Source: https://patents.google.com/patent/JP5369999B2/en
Timestamp: 2020-01-28 07:54:00
Document Index: 450771730

Matched Legal Cases: ['art 20', 'art 11', 'art 20', 'art 24', 'art 24', 'art 11', 'art 20', 'art 20', 'art 11', 'art 11', 'art 11', 'art 12', 'art 25']

JP5369999B2 - Vehicle - Google Patents
JP5369999B2
JP5369999B2 JP2009196799A JP2009196799A JP5369999B2 JP 5369999 B2 JP5369999 B2 JP 5369999B2 JP 2009196799 A JP2009196799 A JP 2009196799A JP 2009196799 A JP2009196799 A JP 2009196799A JP 5369999 B2 JP5369999 B2 JP 5369999B2
JP2009196799A
JP2011046294A (en
憲一 島川
宗裕 高橋
真規 岡田
2009-08-27 Application filed by 株式会社エクォス・リサーチ filed Critical 株式会社エクォス・リサーチ
2009-08-27 Priority to JP2009196799A priority Critical patent/JP5369999B2/en
2011-03-10 Publication of JP2011046294A publication Critical patent/JP2011046294A/en
2013-12-18 Publication of JP5369999B2 publication Critical patent/JP5369999B2/en
238000007514 turning Methods 0 abstract 6
<P>PROBLEM TO BE SOLVED: To provide a vehicle which facilitates turning operation, and easily inclines a vehicle body, and maintains the stability of the vehicle body, and which also improves turning performance, and achieves excellent ride comfort and a stable traveling state. <P>SOLUTION: The vehicle includes the vehicle body including a steering section and a driving section connected to each other; a steering wheel that is the wheel rotatably attached to the steering section and steers the vehicle body; a driving wheel that is the wheel rotatably attached to the driving section and drives the vehicle body; a gravity center movement detection means for detecting the gravity center movement of an occupant; a required turning amount detection means for detecting a required turning amount of the vehicle body required by the occupant; an inclination actuator device for inclining the driving section in a turning direction; and a control device for controlling the inclination of the vehicle body by controlling the inclination actuator device. Upon detection of the gravity center movement of the occupant, the control device initiates the inclination of the vehicle body before inputting the required turning amount. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT
The present invention relates to a vehicle including at least a pair of left and right wheels and a link mechanism that supports the pair of left and right wheels.
In particular, the present invention relates to a vehicle that can improve turning performance, perform stable turning, reduce the burden on an occupant, and ensure comfort.
In recent years, in view of the problem of depletion of energy resources, there has been a strong demand for fuel saving of vehicles. On the other hand, the number of vehicle owners is increasing due to the low price of vehicles, and one person tends to own one vehicle. Therefore, for example, there is a problem that energy is wasted when only one driver drives a four-seater vehicle. The most efficient way to save fuel consumption by reducing the size of the vehicle is to configure the vehicle as a one-seater tricycle or four-wheel vehicle.
However, depending on the running state, the stability of the vehicle may decrease. Therefore, a technique for improving the stability of the vehicle during turning by tilting the vehicle body in the lateral direction has been proposed (for example, see Patent Document 1).
JP 2008-155671 A
However, in the conventional vehicle, in order to improve the turning performance, the vehicle body can be tilted inward in the turning direction, but the operation of tilting the vehicle body is difficult and the turning performance is low. , Passengers may feel uncomfortable or anxious.
The present invention solves the problems of the conventional vehicle, and when the movement of the center of gravity of the occupant is detected, the vehicle body can be tilted before the steering input by the occupant is performed, so that the turning operation is easy. The vehicle body can be easily tilted, the vehicle body stability can be maintained, the turning performance can be improved, the ride comfort is good, and the safety that can realize a stable running state The purpose is to provide a vehicle with high height.
To this end, in the vehicle of the present invention, a vehicle body including a steering unit and a drive unit coupled to each other, a wheel rotatably attached to the steering unit, the steering wheel for steering the vehicle body, and the drive A wheel that is rotatably attached to the vehicle, the driving wheel that drives the vehicle body, a gravity center detection unit that detects movement of the center of gravity of the occupant, and a requested turning that detects a requested turning amount of the vehicle body requested by the occupant A vehicle having amount detection means, a tilting actuator device that tilts the drive unit in a turning direction, and a control device that controls the tilting actuator device to control the tilting of the vehicle body; when the center of gravity movement of the occupant is detected, a request turning amount of input before to start the vehicle body tilt body was a predetermined angle inclined, when the absolute value of the requested turning amount is below the threshold, the car Return the inclination to the original.
According to the configuration of the first aspect, the turning operation is easy, the vehicle body can be tilted easily, the stability of the vehicle body can be maintained, and the maneuverability and comfort for the occupant are improved. Further, by setting the predetermined angle sufficiently small, the passenger does not feel uncomfortable.
It is a figure which shows the structure of the vehicle in embodiment of this invention. It is a principal part enlarged view which shows the structure of the link mechanism in embodiment of this invention, and is the AA arrow line view in FIG. 1 is a top view of a vehicle in an embodiment of the present invention. It is a figure which shows the operation state of the gravity center movement detection sensor in embodiment of this invention, and is a BB arrow line view in FIG. It is a figure which shows the operation state in case the gravity center movement detection sensor in embodiment of this invention is a proximity sensor. It is a figure which shows the operating state of the gravity center movement detection sensor at the time of the vehicle body tilt in embodiment of this invention. It is a figure explaining the time change of the inclination angle in embodiment of this invention. It is a flowchart which shows the outline of operation | movement of the turning control process of the vehicle in embodiment of this invention. It is a flowchart which shows the operation | movement of the initial value setting of the gravity center movement detection sensor in embodiment of this invention. It is a flowchart which shows the detail of operation | movement of the turning control process of the vehicle in embodiment of this invention.
FIG. 1 is a diagram showing a configuration of a vehicle in the embodiment of the present invention, and FIG. 2 is an enlarged view of a main part showing a configuration of a link mechanism in the embodiment of the present invention, and is a view taken along the line AA in FIG. . 1A is a front view, and FIG. 1B is a left side view.
In the figure, reference numeral 10 denotes a vehicle according to the present embodiment, which includes a main body 20 as a vehicle body drive unit, a riding unit 11 as a steering unit on which an occupant gets on and steer, and a center in the width direction in front of the vehicle body. The wheel 12F is a front wheel disposed as a steering wheel, and the left wheel 12L and the right wheel 12R are drive wheels disposed rearward as rear wheels. Further, the lean mechanism for leaning the vehicle body from side to side, that is, the lean mechanism, that is, the vehicle body tilt mechanism, the link mechanism 30 that supports the left and right wheels 12L and 12R, and the tilt as the actuator that operates the link mechanism 30. Actuator device 25. The vehicle 10 may be a tricycle with two front wheels and one rear wheel, or a four-wheel vehicle with two front and rear wheels. In this embodiment, as shown in the figure, a case will be described in which the front wheel is a single wheel and the rear wheel is a left and right wheel tricycle.
When turning, the angle of the left and right wheels 12L and 12R with respect to the road surface 18, that is, the camber angle is changed, and the vehicle body including the riding portion 11 and the main body portion 20 is inclined toward the turning inner wheel, thereby improving the turning performance and the occupant. It is possible to ensure the comfort of the car. That is, the vehicle 10 can tilt the vehicle body in the lateral direction (left and right direction). In the example shown in the figure, the wheels 12L and 12R are upright with respect to the road surface 18, that is, the camber angle is 0 degree.
The link mechanism 30 includes a left vertical link unit 33L that supports a left wheel 12L and a left rotation driving device 51L including an electric motor that applies driving force to the wheel 12L, a right wheel 12R, and the wheel 12R. A right vertical link unit 33R that supports a right rotation drive device 51R composed of an electric motor or the like that applies a driving force to an upper side, and an upper horizontal link unit 31U that connects the upper ends of the left and right vertical link units 33L and 33R; The lower horizontal link unit 31D that connects the lower ends of the left and right vertical link units 33L and 33R, and the central vertical member 21 that has an upper end fixed to the main body 20 and extends vertically. The left and right vertical link units 33L and 33R and the upper and lower horizontal link units 31U and 31D are rotatably connected. Further, the upper and lower horizontal link units 31U and 31D are rotatably connected to the central vertical member 21 at the center thereof. When the left and right wheels 12L and 12R, the left and right rotational drive devices 51L and 51R, the left and right vertical link units 33L and 33R, and the upper and lower horizontal link units 31U and 31D are described in an integrated manner, The rotation drive device 51, the vertical link unit 33, and the horizontal link unit 31 will be described.
The rotary drive device 51 as a drive actuator device is a so-called in-wheel motor, and a body as a stator is fixed to the vertical link unit 33 and is a rotor attached to the body so as to be rotatable. A rotating shaft is connected to the shaft of the wheel 12, and the wheel 12 is rotated by the rotation of the rotating shaft. The rotational drive device 51 may be a motor other than an in-wheel motor.
The tilting actuator device 25 is a rotary electric actuator including an electric motor or the like, and includes a cylindrical body as a stator and a rotating shaft as a rotor rotatably attached to the body. The body is fixed to the main body portion 20 via the mounting flange 22, and the rotating shaft is fixed to the lateral link unit 31 </ b> U on the upper side of the link mechanism 30. The rotation axis of the tilting actuator device 25 functions as a tilting axis for tilting the main body 20, and is coaxial with the rotation axis of the connecting portion between the central vertical member 21 and the upper horizontal link unit 31U. When the tilt actuator device 25 is driven to rotate the rotation shaft with respect to the body, the upper horizontal link unit 31U rotates with respect to the main body 20 and the central vertical member 21 fixed to the main body 20. Then, the link mechanism 30 operates, that is, bends and stretches. Thereby, the main-body part 20 can be inclined. Note that the tilting actuator device 25 may have its rotational axis fixed to the central vertical member 21.
The riding part 11 is connected to the front end of the main body part 20 via a connecting part 24. The connecting part 24 has a function of connecting the riding part 11 and the main body part 20 so as to be relatively displaceable in a predetermined direction. For example, the main body part 20 is connected to the riding part 11 in a vertical direction and a horizontal direction ( It has a function of connecting in a swingable manner in the swiveling direction.
The boarding part 11 includes a seat 11a, a footrest 11b, a windbreak part 11c, and a loading platform 11d. The seat 11 a is a part for a passenger to sit while the vehicle 10 is traveling. The footrest 11b is a part for supporting the occupant's foot, and is disposed on the front side (the left side in FIG. 1B) and below the seat 11a.
A steering device 41 is disposed in front of the seat 11a. The steering device 41 is provided with members necessary for steering such as a handle bar 41a as a steering device, a meter such as a speed meter, an indicator, and a switch. The occupant operates the handle bar 41a and other members to instruct the traveling state of the vehicle 10 (for example, traveling direction, traveling speed, turning direction, turning radius, etc.). As a steering device that is a means for detecting the required turning amount of the vehicle body requested by the occupant, other devices such as a steering wheel, a jog dial, a touch panel, and a push button are used instead of the handle bar 41a. It can also be used as In addition, the steering device 41 includes a steering amount detector such as an encoder that detects the steering amount of the handle bar 41a as a steering device. In the present embodiment, the steering amount of the steering device is detected as the required turning amount.
Further, a battery device (not shown) is disposed behind or below the riding section 11 or on the main body section 20. The battery device is an energy supply source for the rotation drive device 51 and the tilt actuator device 25. Further, a control device, an inverter device, and the like (not shown) are accommodated in the rear portion or the lower portion of the riding portion 11 or in the main body portion 20. Further, the main body 20 is provided with a sensor housing case 55 that houses various sensors such as an acceleration sensor.
The wheel 12F is connected to the riding section 11 via a front wheel fork 17 that is a part of a suspension device (suspension device). The suspension device is a device similar to a suspension device for front wheels used in, for example, general motorcycles, bicycles, and the like, and the front wheel fork 17 is, for example, a telescopic type fork with a built-in spring. As in the case of a general motorcycle, bicycle, etc., the wheel 12F as the steered wheel changes the steering angle in accordance with the operation of the handlebar 41a by the occupant, thereby changing the traveling direction of the vehicle 10.
Further, the vehicle 10 in the present embodiment has a vehicle body control system as a control device (not shown). The vehicle body control system is a kind of computer system, and is connected to a control device 41, a rotation drive device 51, a tilt actuator device 25, a steering amount detector, and the like. Further, a centroid movement detection sensor 56 (to be described later) for detecting the occupant's centroid movement is connected to the vehicle body control system. The vehicle body control system is also connected to a wheel tachometer (not shown) that detects the rotation speed of the wheel 12 and a vehicle body inclination angle meter (not shown) that detects the inclination angle of the vehicle body, and comprehensively controls all operations of the vehicle 10. Control. Specifically, when the movement of the center of gravity of the occupant is detected, the vehicle body starts to be tilted before the required turning amount is input.
Next, the center-of-gravity movement detection sensor 56 will be described in detail.
FIG. 3 is a top view of the vehicle in the embodiment of the present invention, FIG. 4 is a diagram showing an operation state of the center-of-gravity movement detection sensor in the embodiment of the present invention, and is a BB arrow view in FIG. FIG. 6 is a diagram showing an operation state when the center-of-gravity movement detection sensor according to the embodiment of the present invention is a proximity sensor, and FIG. 6 is a diagram showing an operation state of the center-of-gravity movement detection sensor when the vehicle body is tilted according to the embodiment of the present invention. . 4 to 6, (a) is a diagram showing a state where the center of gravity has not moved, and (b) is a diagram showing a state where the center of gravity has moved to the right side.
In the present embodiment, the center-of-gravity movement detection sensor 56 for detecting the center-of-gravity movement of the occupant is disposed on the seat 11a of the riding section 11 as shown in FIG. The center-of-gravity movement detection sensor 56 includes a right-side center-of-gravity movement detection sensor 56R disposed on the right side of the vehicle body and a left-side center-of-gravity movement detection sensor 56L disposed on the left side of the vehicle body. Based on the detection value of the movement detection sensor 56L, the movement of the center of gravity of the occupant in the left-right direction is detected. When the right side gravity center movement detection sensor 56R and the left side gravity center movement detection sensor 56L are described in an integrated manner, they will be described as the gravity center movement detection sensor 56. Further, although the right side gravity center movement detection sensor 56R and the left side gravity center movement detection sensor 56L may each be a plurality, only a single case will be described here.
In the example shown in FIG. 4, the right center-of-gravity movement detection sensor 56R and the left center-of-gravity movement detection sensor 56L are composed of sensors that directly measure loads, such as a load detection sensor, a surface pressure sensor, and a load cell, and an occupant sits on the seat 11a. The load applied to the right side and the left side of the seat 11a generated by the seating is detected.
As shown in FIG. 4A, when the weight of the occupant is M [kg] and the center of gravity is located at the left and right centers on the seat 11a, the right center-of-gravity movement detection sensor 56R and the left center-of-gravity movement are detected. As indicated by an arrow C, the loads received by the detection sensor 56L are equal to each other. Therefore, the detection values of the right side gravity center movement detection sensor 56R and the left side gravity center movement detection sensor 56L are both Mg / 2 [N].
However, if the centroid of the occupant moves to either the left or right, the detection values of the right centroid movement detection sensor 56R and the left centroid movement detection sensor 56L are different, so that the movement of the occupant's center of gravity can be detected.
FIG. 4B shows an example in which the center of gravity of the occupant moves in the right direction. In this case, as shown by the arrow C, the loads received by the right centroid movement detection sensor 56R and the left centroid movement detection sensor 56L are non-uniform. Then, the detection value MR [N] of the right centroid movement detection sensor 56R becomes larger than the detection value ML [N] of the left centroid movement detection sensor 56L. Thereby, it is detected that the center of gravity of the passenger has moved to the right.
It is also conceivable that the occupant is in a posture where his / her hip floats from the seat 11a. Even in such a case, in order to detect the movement of the center of gravity of the occupant, the center-of-gravity movement detection sensor 56 can be disposed on the footrest 11b. Thereby, the change of the load concerning the footrest 11b through a passenger | crew's leg | foot is detectable. The center-of-gravity movement detection sensor 56 may be disposed on both the seat 11a and the footrest 11b, only on the seat 11a, or only on the footrest 11b as necessary. Also good.
The center-of-gravity movement detection sensor 56 does not necessarily include a sensor that directly measures a load, but includes a sensor that detects a distance from an object such as a proximity sensor and a contact sensor. Also good. In this case, as shown in FIG. 5, the right-side center-of-gravity movement detection sensor 56R and the plate-like lower member 57D and the plate-like upper member 57U disposed above and below the plate-like upper member are swingable. A left center-of-gravity movement detection sensor 56L is provided. Reference numeral 57C denotes a swinging shaft member that swingably supports the lower member 57D at the center of the left and right, and 58 denotes spring members disposed on both the left and right sides of the swinging shaft member 57C. Is generated.
As shown in FIG. 5A, when the center of gravity of the occupant is located at the center of the left and right, the distance between the upper member 57U and the right center of gravity movement detection sensor 56R, and the upper member 57U and the left center of gravity movement detection sensor. The distance to 56L is equal to each other. Therefore, the detection values of the right center-of-gravity movement detection sensor 56R and the left side center-of-gravity movement detection sensor 56L are equal.
FIG. 5B shows an example in which the center of gravity of the occupant moves in the right direction. In this case, the distance between the upper member 57U and the right center of gravity movement detection sensor 56R is shorter than the distance between the upper member 57U and the left side center of gravity movement detection sensor 56L. The right center-of-gravity movement detection sensor 56R detects the proximity or contact of the upper member 57U. Thereby, it is detected that the center of gravity of the passenger has moved to the right.
In addition, since the detection direction of the gravity center movement detection sensor 56 is parallel to the axial center direction of the vehicle body, even when the vehicle body is tilted to the left and right, based on the detection value of the gravity center movement detection sensor 56, The center of gravity movement to can be detected.
For example, as shown in FIG. 6A, the center of gravity of the occupant is positioned at the left and right centers on the seat 11a even when the axis of the vehicle body is inclined to the right by an angle θ with respect to the vertical line. In this case, since the axial component of the occupant's weight acts on the left and right centers on the seat 11a, the loads received by the right centroid movement detection sensor 56R and the left centroid movement detection sensor 56L are as indicated by an arrow C. Are equal to each other. The detection values of the right center of gravity movement detection sensor 56R and the left center of gravity movement detection sensor 56L are both Mgcos η / 2 [N].
FIG. 6B shows an example in which the center of gravity of the occupant moves in the right direction. In this case, as shown by the arrow C, the loads received by the right centroid movement detection sensor 56R and the left centroid movement detection sensor 56L are non-uniform. Then, the detection value MR [N] of the right centroid movement detection sensor 56R becomes larger than the detection value ML [N] of the left centroid movement detection sensor 56L. Thereby, it is detected that the center of gravity of the passenger has moved to the right.
Next, the operation of the vehicle 10 configured as described above will be described. Here, only the operation of the turning control process will be described. First, an outline of the operation of the turning control process will be described.
FIG. 7 is a diagram for explaining the change over time of the inclination angle in the embodiment of the present invention, and FIG. 8 is a flowchart showing an outline of the operation of the vehicle turning control process in the embodiment of the present invention. In FIG. 7, (a) shows a comparative example, and (b) shows the present embodiment.
When the turning control process is started, the vehicle body control system first performs control based on gravity center input (step S1). Specifically, based on the detection value of the center-of-gravity movement detection sensor 56, it is determined whether or not the occupant's center of gravity has moved to the left or right. When the center of gravity moves, the vehicle is inclined A (step S2), assuming that the occupant intends to turn, and the vehicle 10 is inclined by a predetermined angle A in the direction in which the center of gravity moves. The turning control process is a process that is repeatedly executed by the vehicle body control system (for example, at intervals of 0.2 [ms]) while the vehicle 10 is powered on, and improves turning performance during turning. This is a process for ensuring the comfort of passengers.
Here, the angle A is a preset value, and the inclination angle of the vehicle 10 is determined based on the steering amount input from the handle bar 41a, that is, the required turning amount in a normal turning control process. That is, it is a value smaller than the minimum value of the lean angle, for example, about 1 degree.
Subsequently, the vehicle body control system performs control based on the steering input (step S3). In this case, similarly to the normal turning control process, the tilting actuator device 25 is set so that the tilting angle is determined based on the steering amount input from the handlebar 41a, that is, the required turning amount as the steering input. The vehicle 10 is tilted by driving control. That is, vehicle tilt control is performed from the steering angle (step S4), and the process is terminated. The vehicle tilt control is a control that follows a target tilt angle determined based on a required turning amount.
As a result, as shown in FIG. 7 (b), the vehicle is tilted when it is determined that the occupant intends to turn, and the vehicle is tilted to an angle A, so that the operation of the handle bar 41a by the occupant is started. The vehicle body starts to tilt before the required turning amount is input (ie, when the steering input is generated). Therefore, the occupant can perform an operation of turning the vehicle 10 without feeling uncomfortable. In other words, when the occupant moves the center of gravity in the turning direction, the inward turning of the vehicle body starts, so the operation feeling during turning is similar to that of a vehicle that tilts the vehicle body like a two-wheeled vehicle Thus, the operability is natural and good.
On the other hand, when the control based on the center of gravity is not performed, as shown in FIG. 7A, after the operation of the handlebar 41a by the occupant is started, that is, after the required turning amount is input ( The car body will begin to tilt (after steering input occurs). In a turning operation of a vehicle that tilts a vehicle body such as a two-wheeled vehicle, generally, an occupant first moves the center of gravity in a turning direction, and then operates a handle or the like. Therefore, even if the center of gravity is moved as the intention of turning, if the vehicle body tilt is not started until the operation of the handlebar 41a is started, the occupant feels a time lag and feels uncomfortable with the turning operation of the vehicle 10. .
Next, the initial value setting operation of the gravity center movement detection sensor 56 will be described in detail. Hereinafter, for convenience of explanation, only the case where the center-of-gravity movement detection sensor 56 is composed of a sensor that directly measures a load will be described.
FIG. 9 is a flowchart showing the initial value setting operation of the center-of-gravity movement detection sensor according to the embodiment of the present invention.
In general, when the vehicle 10 is traveling straight, the center of gravity of the occupant can be considered to be located at the center of the left and right on the seat 11a as shown in FIG. When the vehicle 10 is traveling straight, the center of gravity of the occupant may be biased to either the left or right when carrying the vehicle, hanging on the shoulder, or when the occupant is inclined. is there. In this case, as shown in FIG. 4B, the detection value MR [N] of the right centroid movement detection sensor 56R and the detection value ML [N] of the left centroid movement detection sensor 56L are not equal. In this case, when starting to turn, since the center of gravity of the occupant moves in the turning direction from the state where the center of gravity is biased to either the left or right, the state where the center of gravity is biased to either the left or right is grasped as the initial state. It is necessary to keep it. Therefore, in this embodiment, the initial value of the gravity center movement detection sensor 56 is set.
When the turning control process is started, the vehicle body control system first detects the center of gravity (step S11). Specifically, the detection value MR [N] of the right centroid movement detection sensor 56R and the detection value ML [N] of the left centroid movement detection sensor 56L are acquired.
Subsequently, the vehicle body control system sets the detection value of each center-of-gravity movement detection sensor 56 as an initial value (step S12), and ends the process. In this case, as shown in FIG. 4B, even if the detection value MR [N] and the detection value ML [N] are not equal, the detection value MR [N] and the detection value ML [N] The initial value MRI [N] and the initial value MLI [N] of the right center-of-gravity movement detection sensor 56R and the left center-of-gravity movement detection sensor 56L are set.
Next, details of the operation of the turning control process will be described.
FIG. 10 is a flowchart showing details of the operation of the vehicle turning control process according to the embodiment of the present invention.
First, the vehicle body control system detects the center of gravity (step S21). Specifically, the detection value MR [N] of the right centroid movement detection sensor 56R and the detection value ML [N] of the left centroid movement detection sensor 56L are acquired.
Subsequently, the vehicle body control system compares the detected value with an initial value (step S22). Specifically, the detection value MR [N] of the right center of gravity movement detection sensor 56R and the detection value ML [N] of the left center of gravity movement detection sensor 56L are compared with the initial value MRI [N] and the initial value MLI [N]. Then, it is determined whether or not the center of gravity moves.
If the detection value MR [N] of the right center of gravity movement detection sensor 56R and the detection value ML [N] of the left center of gravity movement detection sensor 56L are different from the initial value MRI [N] and the initial value MLI [N], the occupant Has moved the center of gravity, that is, it has been determined that there has been a center of gravity movement, and the vehicle body control system performs vehicle tilting based on the center of gravity input (step S23). Specifically, assuming that the occupant has a intention to turn, the vehicle 10 is inclined by an angle A in the direction in which the center of gravity moves.
As described above, the angle A degree is a preset value, and is determined based on the steering amount input from the handle bar 41a, that is, the requested turning amount in a normal turning control process. The inclination angle, that is, a value smaller than the minimum value of the lean angle. As will be described later, the inclination is returned to the original when steering is not performed by the occupant, but even in that case, the value is small enough not to give the occupant a sense of incongruity. Specifically, the angle A degree is desirably about 1 degree.
Subsequently, the vehicle body control system measures the steering angle (step S24). Specifically, the steering amount of the handle bar 41a as the required turning amount measured by the steering amount detector, that is, the rotation angle θ of the steering shaft of the wheel 12F is acquired. Note that the value of θ is zero when the angle of the steering shaft when traveling straight is zero as a reference value, positive when the steering shaft rotates to turn right, and negative when the steering shaft rotates to turn left. Suppose that
Then, the vehicle body control system compares the absolute value of the rotation angle θ with B (step S25). Here, B is a preset boundary value, which is a value indicating a range of play or rattling of the control device 41, and is, for example, about 0.5 degrees.
As a result of the comparison, when the absolute value of the rotation angle θ is B or less, that is, when | θ | ≦ B, the steering amount of the handle bar 41a is very small. The occupant is assumed not to steer, so the vehicle should go straight. That is, the vehicle body is kept upright without changing the rudder angle of the wheel 12F and the link mechanism 30 is not operated, that is, the lean angle control is not performed.
Therefore, the vehicle body control system returns the vehicle inclination (step S26). That is, in step S23, the vehicle 10 is tilted by an angle A in the direction in which the center of gravity has moved, assuming that the occupant has a intention to turn based on the detection result of the center of gravity. Since it has been found that it is more appropriate to consider that there is no intention to turn, control for restoring the inclination by the angle A is executed.
Then, the vehicle body control system resets the initial value (step S27) and ends the turning control process. Specifically, the detected value MR [N] and the detected value ML [N] acquired by detecting the center of gravity in step S21 are respectively used as the initial value MRI [of the right center of gravity movement detection sensor 56R and the left center of gravity movement detection sensor 56L. N] and the initial value MLI [N].
As described above, the turning control process is repeatedly executed by the vehicle body control system while the vehicle 10 is powered on.
Further, the absolute value of the rotation angle θ is compared with B. If the absolute value of the rotation angle θ is larger than B, that is, if | θ |> B, the occupant is considered to be steering. Therefore, the vehicle body control system performs lean angle control (step S28) and ends the turning control process.
Note that the lean angle in the lean angle control, that is, the lean angle of the vehicle body can be obtained from the turning radius and the vehicle speed. That is, when the steering angle is θ 1 , the axial distance (wheel base) between the wheel 12F and the wheels 12L and 12R is L, and the turning radius is R, the relationship of the following equation (1) is obtained according to Ackerman Janto's theory. Is established.
R = L / sin θ 1 (1)
When the lean angle is θ 2 , the vehicle speed is V, and the gravitational acceleration is g, the following equation (2) is established as a basic equation used for calculating the lean angle of the two-wheeled vehicle.
R = V 2 / g / tan θ 2 Formula (2)
Then, the tilt actuator device 25 is driven and controlled based on the lean angle obtained according to the equation (2) to control the tilt angle of the vehicle 10.
On the other hand, the detection value is compared with the initial value, and the detection value MR [N] of the right center of gravity movement detection sensor 56R and the detection value ML [N] of the left center of gravity movement detection sensor 56L are the initial value MRI [N] and the initial value MLI. When it is equal to [N], it is determined that the occupant has not moved the center of gravity, that is, the center of gravity has not been moved, and the vehicle body control system measures the steering angle (step S29).
Subsequently, the vehicle body control system compares the absolute value of the rotation angle θ with B (step S30). If the absolute value of the rotation angle θ is equal to or less than B, that is, if | θ | ≦ B, turning control is performed. The process ends.
When the absolute value of the rotation angle θ is larger than B, that is, when | θ |> B, the vehicle body control system performs lean angle control (step S31) and ends the turning control process.
As described above, in the present embodiment, when the movement of the center of gravity of the occupant is detected, it is determined that the occupant intends to turn, and the vehicle 10 is moved to the angle A degree before the operation of the handlebar 41a by the occupant is started. It is designed to tilt up to. Thereby, the passenger can perform an operation of turning the vehicle 10 without feeling uncomfortable.
Even after that, when the occupant does not operate the handle bar 41a, it is assumed that the occupant has no intention to turn, and the inclination of the vehicle 10 is restored. In this case, since the angle A is set sufficiently small, the occupant does not feel uncomfortable even if the inclination is restored.
The present invention is not limited to the above-described embodiment, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.
The present invention can be used for a vehicle including at least a pair of left and right wheels and a link mechanism that supports the pair of left and right wheels.
DESCRIPTION OF SYMBOLS 10 Vehicle 11 Boarding part 12F, 12R, 12L Wheel 20 Main-body part 25 Inclination actuator apparatus
A vehicle body including a steering unit and a drive unit coupled to each other;
A wheel rotatably attached to the steering unit, the steering wheel for steering the vehicle body;
A wheel rotatably attached to the drive unit, the drive wheel driving the vehicle body;
A center-of-gravity movement detecting means for detecting the movement of the center of gravity of the occupant;
Requested turning amount detecting means for detecting a requested turning amount of the vehicle body requested by an occupant;
A tilting actuator device for tilting the drive unit in a turning direction;
A vehicle having a controller for controlling the tilt of the vehicle body by controlling the actuator device for tilting,
When the movement of the center of gravity of the occupant is detected, the control device starts tilting the vehicle body before tilting the required turning amount to tilt the vehicle body by a predetermined angle, and the absolute value of the required turning amount is equal to or less than a threshold value. In some cases, the vehicle is characterized in that the inclination of the vehicle body is restored .
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JP2009196799A Active JP5369999B2 (en) 2009-08-27 2009-08-27 Vehicle
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