Patent ID: 11904864
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An update system for related value information, comprising:
a first vehicle and a second vehicle, wherein the second vehicle is the same vehicle as the first vehicle or a vehicle different from the first vehicle; and
a storage device,
wherein the storage device is arranged in any one of the first vehicle, the second vehicle, and a place other than the first vehicle and the second vehicle,
wherein the first vehicle includes a sensor configured to measure a sensor value for identifying a road surface displacement-related value, which is a value related to a road surface displacement being a displacement, in a vertical direction, of a road surface on which the first vehicle travels,
wherein the second vehicle includes a control force generation device configured to generate a control force in the vertical direction such that the control force is generated between at least one wheel of the second vehicle and a vehicle body part corresponding to a position of the at least one wheel,
wherein the first vehicle is configured to:
obtain the sensor value from the sensor at predetermined measurement intervals and obtain a measurement position at which the sensor value is measured, in a period from a time at which a predetermined measurement start condition is satisfied to a time at which a predetermined measurement end condition is satisfied; and
provide, to the storage device, travel information formed by associating the sensor value and the measurement position with each other,

wherein the second vehicle is configured to:
obtain, through use of the related value information held by the storage device, as a control related value, a road surface displacement-related value at a predicted passing position at which the at least one wheel is predicted to pass at a time when a predetermined period elapses from a current time;
obtain a target force for damping a sprung portion of the second vehicle based on the control related value; and
execute preview damping control of controlling the control force generation device such that the control force generation device coincides the control force with the target force when the wheel passes the predicted passing position,

wherein the storage device includes a related value information storage configured to store related value information in which the road surface displacement-related value corresponding to a position of the road surface is registered, and
wherein the storage device is configured to:
apply high-pass filter processing to one of the sensor value included in the travel information provided from the first vehicle and the road surface displacement-related value identified based on the sensor value, to thereby obtain a road surface displacement-related value from which a low frequency component lower than a predetermined cutoff frequency is removed;
add a value which is obtained by applying the high-pass filter processing to one of the sensor value and the road surface displacement-related value in a chronological order of the measurement of the sensor value, and a value which is obtained by applying the high-pass filter processing to one of the sensor value and the road surface displacement-related value in a reverse chronological order of the measurement of the sensor value, to each other, to thereby remove the low frequency component from the road surface displacement-related value;
update the related value information based on the road surface displacement-related values obtained by excluding, from the road surface displacement-related values from which the low frequency component is removed, at least one of: start-stage related values being a first predetermined number of road surface displacement-related values from a start-point related value being a road surface displacement-related value identified based on the sensor value obtained when the predetermined measurement start condition is satisfied; or end-stage related values being a second predetermined number of road surface displacement-related values to an end-point related value being a road surface displacement-related value identified based on the sensor value obtained when the predetermined measurement end condition is satisfied; and
update the related value information based on the road surface displacement-related values obtained by excluding the start-stage related values and the end-stage related values from the road surface displacement-related values from which the low frequency component is removed.