Driving force control device for a vehicle
First Claim
1. A driving force control device for a vehicle, comprising:
- wheel speed sensor for detecting a wheel speed; and
at least one processor, the at least one processor configured for;
estimating, based on the wheel speed, a sprung vibration to be generated in a pitch direction of a vehicle body due to an input from a road surface;
calculating a vibration suppression driving force for suppressing the estimated sprung vibration;
calculating a target driving force acquired by adding the vibration suppression driving force to a driver required driving force to be set depending on a driver required acceleration/deceleration;
controlling a driving force to be generated on a wheel in accordance with the target driving force;
calculating, based on the driver required acceleration/deceleration, an error indication value representing a magnitude of an error, which is included in an estimation of the sprung vibration and is generated by a change in a vehicle body speed; and
decreasing, based on the error indication value, the vibration suppression driving force to be added to the driver required driving force in a case where the error indication value is greater than a threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A sprung vibration estimation unit is configured to calculate a pitch rate of a vehicle body based on the wheel speeds detected by wheel speed sensors. A vibration suppression driving force calculation unit is configured to calculate a vibration suppression driving force for suppressing pitching of the vehicle body based on the pitch rate. An integration unit is configured to calculate a vehicle body speed based on a driver required driving force. A second sprung vibration estimation unit is configured to calculate a pitch rate of the vehicle body (vehicle body speed pitch rate) generated by a change in the vehicle body speed. A determination unit is configured to output a cutoff command for the vibration suppression driving force to an adjustment unit when the vehicle body speed pitch rate is more than a threshold.
15 Citations
11 Claims
-
1. A driving force control device for a vehicle, comprising:
-
wheel speed sensor for detecting a wheel speed; and at least one processor, the at least one processor configured for; estimating, based on the wheel speed, a sprung vibration to be generated in a pitch direction of a vehicle body due to an input from a road surface; calculating a vibration suppression driving force for suppressing the estimated sprung vibration; calculating a target driving force acquired by adding the vibration suppression driving force to a driver required driving force to be set depending on a driver required acceleration/deceleration; controlling a driving force to be generated on a wheel in accordance with the target driving force; calculating, based on the driver required acceleration/deceleration, an error indication value representing a magnitude of an error, which is included in an estimation of the sprung vibration and is generated by a change in a vehicle body speed; and decreasing, based on the error indication value, the vibration suppression driving force to be added to the driver required driving force in a case where the error indication value is greater than a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification