Abstract:
In at least some implementations, a method for preventing inadvertant operation of a vehicle access system that includes a plurality of inputs involves providing a keypad operable to output signals to control a vehicle system based on entry of a code via the inputs, detecting when a predetermined access sequence is inputted via the inputs and outputting a signal to a vehicle system to allow access to the vehicle, and operating the keypad in a disabled mode wherein the keypad output signals are not outputted. The disabled mode may be activated either actively or passively or both, and the disabled mode may be terminated either actively or passively or both.

Description:
TECHNICAL FIELD 
       [0001]    The present disclosure relates to a vehicle access system with inadvertent actuation control. 
       BACKGROUND 
       [0002]    Some vehicles include a keypad or other system to permit secure access to a vehicle interior from the exterior of the vehicle. To gain access to a locked vehicle having a keypad a code is entered into the keypad by depressing a series of buttons (often numbered) or by touching the keypad in the area of sensors which detect or register the touch. When the correct code is entered, the state of a vehicle door lock may be changed from locked to unlocked, or vice versa. The keypad sensors may be capacitive and/or touch sensitive and such sensors may be inadvertently actuated by inadvertent human touches, or by water or other capacitive media on the keypad such as may occur during a rain storm or a vehicle car wash. 
       SUMMARY 
       [0003]    In at least some implementations, a method for preventing inadvertant operation of a vehicle access system that includes a plurality of inputs involves providing a keypad operable to output signals to control a vehicle system based on entry of a code via the inputs, detecting when a predetermined access sequence is inputted via the inputs and outputting a signal to a vehicle system to allow access to the vehicle, and operating the keypad in a disabled mode wherein the keypad output signals are not outputted. The disabled mode may be activated either actively or passively under a variety of predefined circumstances, such as (but not limited to), entry of one or more codes, movement of the vehicle, the vehicle transmission being in a gear other than park, or when water is detected at the keyboard or inputs. 
         [0004]    In at least some implementations, a method for preventing inadvertent activation of a vehicle door lock by an access control device that includes multiple inputs that may be activated individually or collectively to provide an output signal to a controller communicated with the vehicle door lock to selectively change the state of the vehicle door lock, includes actively or passively activating a disabled mode of the access control device to prevent activation of the vehicle door lock when the disabled mode is activated. 
         [0005]    The disabled mode may be activated and terminated by various active and passive ways, where active ways involve user action and passive ways may be independent of user action. For example, a passive disenablement requires no action from a user and is implemented automatically by one or more vehicle control systems or controllers. Representative examples include automatic disablement of the keypad (or related controller) upon detecting movement of the vehicle, detecting that the vehicle is in a gear other than park, as a function of the location of the vehicle, or upon sensing water at or on the keypad. Active user disablement may also be permitted and are directly and intentionally controlled by the user. Representative examples include user entry of desired code via the keypad inputs or other manipulation of the keypad inputs or via a vehicle infotainment or other user controlled vehicle system. 
         [0006]    Other embodiments can be derived from combinations of the above and those from the embodiments shown in the drawings and the descriptions that follow. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    The following detailed description of preferred implementations and best mode will be set forth with regard to the accompanying drawings, in which: 
           [0008]      FIG. 1  is an enlarged, fragmentary view of a portion of the vehicle including a keypad; and 
           [0009]      FIGS. 2-5  are flow charts of control systems for a vehicle access system. 
       
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0010]    Referring in more detail to the drawings,  FIG. 1  illustrates a passenger vehicle  10  having a door  12  that may be closed and locked to inhibit access to, and unlocked and opened to permit access to, a passenger compartment  14  of the vehicle  10 . The portion of the vehicle  10  shown in  FIG. 1  includes part of the driver&#39;s side door  12 , B-pillar  16  and a portion of the passenger compartment  14  including a steering wheel  18  can be seen through a window  20  in the driver&#39;s side door  12 . The door  12  may include a frame, an exterior panel  22  on the frame and the window  20  which may move up and down between open and closed positions. A capping or trim piece  24  may be located adjacent to at least part of the window  20 , and may define or cover part of a window frame. In  FIG. 1 , such a trim piece  24  extends vertically along a side of the window  20  (and may cover the side edge of the window and a guide track or frame in which the window moves) adjacent to and, in at least some implementations, overlapping and covering part of the vehicle B-pillar  16 . 
         [0011]    To control actuation of a lock  28  associated with the door  12 , a vehicle access system  30  may include an access control device which may include a keypad  32  having one or more inputs  34  and a controller  36 . Additionally, a wireless remote control device such as a key FOB or a NFC device, may be used for control of the vehicle door lock. In the implementation shown, the keypad  32  is located within the window trim piece  24 , and may be embedded there for improved appearance and protection from the exterior environment and contaminants. In such implementations, the trim piece  24  may define a contact surface for the keypad, and may be translucent or transparent to permit light transmission therethrough, such as LED lighting of the keypad or surrounding area to facilitate viewing the keypad and its inputs. Other locations for the keypad may also be used, such as in the door panel, on or near a door handle, and the like. The keypad inputs  34  may include one or more buttons or sensors that are coupled to or communicated with the controller  36  so that actuation of the inputs  34  provides an output signal or signals to the controller  36 . The input or inputs  34  may be individually or otherwise actuated to permit entry of a code recognizable by the controller  36 . And the inputs  34  may be manually actuated such as by pressing a finger against or passing a finger near a sensor or button of the input. In response to one or more predetermined output signals from the inputs  34 , the controller  36  may provide an output that controls a vehicle system, such as changing the state of a vehicle door lock  28  from locked to unlocked or vice versa, opening a vehicle trunk, or the like. 
         [0012]    In the example shown in  FIG. 1 , the keypad  32  includes a plurality of inputs  34  that are capacitive or touch sensitive or both, and include discrete sensors beneath a finish surface which may be smooth and free of depressions or protrusions, if desired. The area outboard of and overlying each sensor  34  may include certain indicia  38  (e.g. on the trim piece  24 , or beneath the surface of the trim piece) to identify the effective region or area of the sensor, to facilitate user interaction with the sensor. As shown, the area of each sensor  34  includes one or more numbers to aid a user in sequentially entering a code having any desired quantity of places (where each number is one place), such as 13435 or 2367. In the example shown, five inputs  34  (e.g. sensors) are provided and each sensor has two numbers associated therewith providing number options beyond just 1-5 and including 0-9. Any indicia may be used instead of or in addition to numbers, such as letters, symbols, pictures, depressions or protrusions. 
         [0013]    In the example of capacitive touch sensitive inputs  34 , water and other conductive materials may erroneously cause actuation of the inputs and this can lead to inadvertent or unintentional actuation of the door lock(s)  28  or other system controlled or controllable by the keypad  32 . Hence, when it is raining or the vehicle  10  is traveling through a carwash such that water contacts the keypad  32 , an erroneous or inadvertent actuation of the door locks  28  may occur which is generally not desirable. 
         [0014]    For example, some vehicle users do not know the door lock activation code, for example, a user who is not the owner of the vehicle, or who does not use the keypad  32  to lock or unlock the vehicle doors. So an inadvertent locking of the vehicle doors  12  when the keys are inside the vehicle  10  is undesirable. This may occur when the vehicle  10  is left running (e.g. to let it warm up) while it is raining or snowing, and the rain or snow may actuate the keypad  32  and cause an unintended locking of the door  12 . In some carwashes, the driver of the vehicle  10  is not present within the vehicle as the vehicle moves through the carwash facility. An unintended locking of the door  12  in that situation may cause an issue when an employee of the carwash is unable to get into the vehicle  10 , and the driver or owner of the vehicle is not nearby to or is otherwise unable to enter the code into the keypad  32  to unlock the door. Hence, the carwash employee may be unable move the vehicle  10  out of the carwash line and the carwash line must be stopped to prevent other vehicles from colliding with the locked vehicle. These are just a couple situations where unintended inadvertent actuation of the keypad  32  can cause a problem. 
         [0015]    To inhibit or prevent unintended actuation of vehicle access system  30  via the keypad  32 , the system  30  may provide one or more ways to either override, ignore or disable the keypad inputs  34  and/or the controller  36 , or otherwise ignore controller output signals or not cause the controller to send output signals, in certain situations. The ignoring, overriding or disabling may remain for a certain duration of time, number of times the vehicle (e.g., vehicle engine) is started, actuation of a vehicle door handle (e.g. opening the driver&#39;s door), until a certain code is entered into the keypad  32  or some other threshold is reached or event occurs. Further, the ignoring, overriding or disabling may occur automatically upon sensing certain conditions or events, or by user control, such as by entering a certain code into the keypad  32  or otherwise actuating one or more of the inputs  34  in a certain manner. 
         [0016]    For ease of description, any state in which the keypad inputs  34  are not operable to perform the intended function (e.g. control a door lock) will hereafter be called a disabled mode, and is intended to include ignoring, overriding, disabling or otherwise rendering the keypad or a controller associated therewith unable to perform a function that the keypad or controller could otherwise perform. 
         [0017]    For example, the keypad inputs  34  may be disabled whenever the vehicle  10  (e.g. the vehicle transmission) is in a gear other than park. Because the keypad  32  is located on an exterior of the vehicle  10 , it can be assumed that genuine or intended actuation of the keypad  32  will only occur when the vehicle  10  is in park. In the carwash example, vehicles are usually placed into a neutral gear when moving through a carwash so the keypad in this scenario would be disabled because the vehicle transmission is not in park. Similarly, the keypad  32  may be disabled anytime the vehicle  10  is determined to be moving, that is, not stationary. Again, it may be assumed that genuine or intended keypad actuation will not occur when the vehicle  10  is in motion and should only occur when the vehicle is stationary. Further, the presence of water at or near the keypad  32  or its inputs  34  may be detected and the disabled mode of the keypad may be activated. 
         [0018]    Still further, the vehicle may include some sensors, telematics or communication equipment and signals or information therefrom may be used to determine that the vehicle is in or near a location wherein disablement is desired, and that may cause activation of the disabled mode. In one example, geospatial information, GPS, GNSS or map data, may be used to determine the vehicle proximity to a car wash and cause disablement based on such proximity alone or in combination with other factors (e.g. vehicle speed, time near the car wash, etc, which may help to determine if the vehicle is stopping at the car wash or merely passing by). WIFI, RF, LAN, or other signals may also be transmitted between a car wash and the vehicle, and within a vehicle via a vehicle CAN/LIN, to aid in determining the vehicle proximity to a car wash and subsequent activation of the disabled mode. Further, vehicle sensors and cameras may be used to detect vehicle proximity to a car wash (e.g. camera detection of a car wish sign) to activate the disabled mode as desired. While described with reference to a car wash, the vehicle proximity to other locations may also be used to activate the disabled mode, a car wash is just one example for ease of description herein. Further, when proximity to a car wash is determined by a first sensor (e.g. GPS, RF, or the like), a second sensor may be used to confirm this, such as a sensor or other means to detect water on the vehicle. Hence, in at least some implementations, disabled mode would only be activated when signals from both sensors (or at least two) provide a suitable indication. 
         [0019]    The various disablements noted above may be considered passive because the user need not do anything with regard to the keypad  32  to cause the disablement. Other passive disablements may also be used, the above examples are not intended to be an exhaustive list of passive disablements. 
         [0020]    The keypad  32  may also be disabled in one or more ways by the user and these disablements may be considered to be active disablements because they require some affirmative action on the part of the user. Representative active disablements include actuation of one or more inputs  34  in a predetermined manner, such as: repeated actuation of a single input (e.g. actuating the same sensor several times consecutively), one lengthy actuation of a single input (e.g. actuating for 3 continuous seconds), actuation of a specific code (e.g. actuating sensor corresponding to 9191 or other code), simultaneous actuation of multiple inputs (actuating two or more inputs at the same time, either once, once and holding the actuation for a certain time, or multiple consecutive actuations of the same multiple inputs), or the like. Multiple such actuations may be used in combination. Further, instead of discrete sensors/inputs  34 , the keypad may include one sensor with multiple areas the actuation of which may be differentiated or determined so that the location of touch or actuation may be determinable by the system. In this way, actuating or touching different portions of the sensor equates to actuating different sensors. With such a sensor, and even with multiple sensors  34 , a pattern may be traced by a user (e.g. drawing a line, letter(s), numbers, etc, by moving a user&#39;s finger along the sensor), and the pattern may be recognizable as a code to activate the disabled mode of the keypad  32  or associated controller  36 . Additionally, a vehicle infotainment or other interactive control system (interactive in the sense that the user may make selections among multiple options) may permit the user to activate or terminate the disabled mode via one or more commands or prompts provided from such system to the vehicle access system. 
         [0021]    Further, the disabled mode may remain in effect until a specific code (e.g., enable code) is manually entered into the keypad  32  (thereby ending the disabled mode), or the disabled mode is manually terminated via a vehicle infotainment or interactive system, or for a specific time period, or until water is no longer detected, or until the vehicle is no longer moving, or until it is determined that the vehicle is no longer in or near a particular geographic location (e.g. a carwash), or until the vehicle (e.g. its engine) is shutdown and restarted, etc. When user action is required to terminate the disabled mode such termination may be deemed to be active, and when user action is not required to terminate the disabled mode such termination may be deemed passive. Hence, the system disabled mode may actively or passively activated, and the system disabled mode may be actively or passively terminated. In some instances, the vehicle may be shipped with the access system in the disabled mode so that the system is not actuated during, for example, vehicle final assembly and delivery of the vehicle to a vehicle dealership or customer. In these instances, an initial activation code may be entered into the keypad to terminate the disabled mode and activate the keypad. This initial keypad activation may also occur passively such as by determination that the vehicle is located at a dealership (with geospatial information, communication with some device or network at the dealership and the vehicle, etc) and then activating the keypad without direct manipulation of the keypad. 
         [0022]    In at least some embodiments, the user may actively choose among various enablement modes. For example, when actively initiating the disabled mode, a user may use the keypad  32 , and the sensors/inputs  34  thereof, in particular, to select a desired mode from a plurality of different disabled modes. For example, in an embodiment, the user may be able to select among different disabled modes that provide different features, and in particular, either passive or active enablement or system reactivation out of disabled mode. Hence, by manipulation of the keypad in a predetermined manner (e.g. entry of a code) the user may select a disabled mode that requires user action to terminate the disabled mode (e.g. active enablement) or the user may select a disabled mode that permits passive termination of the disabled mode (e.g. passive enablement, such as enablement after some duration of time, among other options as noted above). In such an embodiment, for example, an actuation of one or more inputs  34  in a particular manner may activate the disabled mode generally, and then the subsequent actuation of one or more inputs  34  in a particular manner may activate a specific disabled mode. That is, each type of disabled mode may have its own manner of being selected and implemented, such as by entry of different codes, one assigned to the different disabled modes. By way of illustration, in one non-limiting example the continued actuation of an input (e.g., input “1-2”) for a predetermined amount of time (e.g., 7 seconds) may activate the disabled mode. Following the activation of the disabled mode generally, the actuation of one input (e.g., input “5-6”) followed by a second actuation of the same input may cause the one particular disabled mode to be activated. Alternatively, the actuation of one input (e.g., input “5-6”) followed a subsequent actuation of a different input (e.g., input “9-0”) may cause a different one of the disabled modes to be activated. And the actuation of one input (e.g., input “9-0”) followed by a second actuation of the same input may cause yet another disabled mode to be activated. 
         [0023]    As with the activation of the disabled mode generally, in at least some embodiments, the activation of a particular disabled mode may be indicated via the keypad  32  by the visual or tactile means described above. For example, the activation of a particular mode may be indicated by flashing of the illumination source (e.g. LED or other light source) associated with the inputs  34  or keypad  32  a certain number of times corresponding to that particular mode. 
         [0024]    While certain inputs for activating different disabled modes, and certain indicators indicating the activation of those modes have been described above, it will be appreciated that other inputs or input combinations/sequences and/or indicators may certainly be used instead as the present disclosure is not limited to any particular inputs and/or indicators. 
         [0025]      FIG. 2  shows a simple control scheme  40  to determine whether the disabled mode is to be initiated. Sensor data, input activation and the like is used at  42  to determine at  44  whether disabled mode is to be initiated. If disabled mode is to be initiated, then keypad use and outputs therefrom are not permitted at  46 , and if disabled mode is not initiated then keypad use and outputs therefrom are permitted at  48 .  FIG. 4  shows a control scheme  60  to determine when active termination of the disabled mode occurs. The keypad is shown at  32  and if disabled mode is initiated at  62  then keypad outputs are disabled at  64 . If disabled mode has not been initiated, then code entry at  66  is outputted at  68 . If no code is entered at  66  then no action is taken as represented at  70 . 
         [0026]      FIG. 5  shows a control  80  scheme regarding initiation of disabled mode at  82  either actively or passively. Active initiation of the disabled mode is shown at  84  which determines if a disable code has been entered via the keypad  32  and, if so, disabled mode is initiated at  85 . Passive initiations of disabled mode are shown at: a)  86  which uses an accelerometer  88  to determine if the vehicle is in motion and, if so, disabled mode is initiated at  85 ; b)  90  which determines if the transmission  92  is in a gear other than park and, if so, disabled mode is initiated at  85 ; c)  94  which uses a water sensor  96  to determine if water is present at the vehicle exterior (e.g. at the keypad) and, if so, disabled mode is initiated at  85 ; and d)  98  which uses information  100  relating to the vehicle location (geospatial information or communication with the vehicle) to determine if the vehicle is at a car wash, and if so, then disabled mode is initiated at  85 . It is noted that  FIG. 5  only shows positive responses from decision blocks  84 ,  86 ,  90 ,  94  and  98 . Negative responses may be ignored in that no action need be taken unless the stated condition in each decision block is met. 
         [0027]    Similar actuations as noted above may be used to terminate the disabled mode, or re-enable a disabled keypad, if desired. The re-enablement actuations may be the same as or different than the disabling code (e.g., ending the disabled mode is activated by the controller  36  detecting the entry of an enable code via the inputs  34 ), as desired. And the above noted disablements could be used in any desired combination, including combinations of passive, active or both passive and active disablements.  FIG. 3  shows a simple control scheme  50  to determine whether the disabled mode is to be terminated. Sensor data, input activation and the like is used at  52  to determine at  54  whether disabled mode is to be terminated. If disabled mode is to be terminated, then keypad use and outputs therefrom are permitted at  56 , and if disabled mode is not terminated then disabled mode continues at  58 . 
         [0028]    The vehicle  10  may provide a response to the user upon disablement or re-enablement of the keypad  32 . The response could be provided via the keypad  32  by visual or tactile means, such as flashing an illumination source (e.g. LED or other light source) associated with the inputs  34  or keypad  32  generally one or a plurality of times, changing the state of an illumination source (e.g. turning an illumination source off upon disablement or on upon re-enablement) or by actuation of an audible signal or alarm, or actuation of a vibrating or other haptic feedback device. The response could also involve other vehicle systems, like the vehicle horn, lights (interior or exterior) or the like. 
         [0029]      FIG. 2  is a simplified flow chart of one control system for activating a vehicle door lock. At  50  it is determined if the keypad  32  is being operated in the disabled mode. If the keypad  32  is being operated in the disabled mode, any keypad inputs  34  are disabled or disregarded by the controller  36  at  52  (i.e., not outputted by the controller) so that inadvertent input actuation cannot activate the door lock  28 . If the keypad  32  is not being operated in the disabled mode, then it is determined at  54  if the correct code was entered at the keypad  32  via the inputs  34 . If the correct code was entered, then the door lock  28  is activated at  56 ; otherwise, no action is taken at  58 . 
         [0030]      FIG. 3  is simplified flow chart of another control system for activating a vehicle door lock. At  60  it is determined if a correct disable code was entered at the keypad  32  via the inputs  34 . If a correct disable code was entered, any keypad inputs  34  are disabled or disregarded by the controller  36  at  62  (e.g., are not outputted by the controller) so that inadvertent input actuation cannot activate the door lock  28 . If a correct disable code was not entered, then an accelerometer or other device  64  is used to determine if the vehicle  10  is in motion at  66 . If the vehicle  10  is in motion, any keypad inputs  34  are, as described above, disabled or disregarded by the controller  36  at  62  e.g., are not outputted by the controller). If the vehicle  10  is not moving, then the door lock  28  is only activated at  60  upon entry of the correct code at the keypad  32  via the inputs  34 , which is determined at  58 . 
         [0031]    While a couple examples of control systems for activating a vehicle door lock have been described above, it will be appreciated the present disclosure is not intended to be limited solely to those examples. Rather, any number of suitable control systems for activating a vehicle door lock other than those described above may certainly be used/implemented, and thus, the present disclosure is not limited to any particular control system(s). Additionally, it will be further appreciated that the present disclosure is not intended to be limited to the steps in the examples described above being performed in any particular order, as different orders of the steps (e.g., those illustrated in  FIG. 3 ) are certainly possible. 
         [0032]    It should be understood that all references to direction and position, unless otherwise indicated, refer to the orientation of the parking brake actuator illustrated in the drawings. In general, up or upward generally refers to an upward direction within the plane of the paper and down or downward generally refers to a downward direction within the plane of the paper. 
         [0033]    While the forms of the invention herein disclosed constitute presently preferred embodiments, many others are possible. It is not intended herein to mention all the possible equivalent forms or ramifications of the invention. It is understood that the terms used herein are merely descriptive, rather than limiting, and that various changes may be made without departing from the spirit or scope of the invention.