Vehicle dynamics control device

摘要

A vehicle dynamics control device includes a control unit that executes braking/driving torque control based upon vehicle information that includes operation input information and vehicle dynamics information. The operation input information includes a lateral motion operation index pertaining to a lateral motion operation executed to generate a lateral motion in the vehicle; the vehicle dynamics information includes a longitudinal acceleration generated in the vehicle and a lateral motion index indicating a lateral motion occurring in the vehicle; and the control unit determines a handling assurance acceleration limit with a maximum longitudinal acceleration value that assumes a substantially linear proportional relationship with the lateral motion operation index and the lateral motion index over a range in which the lateral motion operation index assumes a value equal to or less than a predetermined value or the lateral motion index assumes a value equal to or less than a predetermined value.

主权项

1. A vehicle dynamics control device, comprising:
a control unit that is configured to control a braking torque and a driving torque by respectively correcting a deceleration command and an acceleration command, the deceleration and acceleration command being either voluntarily inputted by a driver or automatically inputted by a control device mounted in a vehicle; and an upper limit calculation unit that is configured to calculate a slip stiffness as a differential value of a longitudinal force exerted on a tire of a wheel of a vehicle with respect to a wheel slip-ratio, wherein
the slip stiffness is a rate of change in the longitudinal force exerted on the tire,the wheel slip ratio is an extent to which an absolute value of a lateral force exerted on the tire changes relative to an absolute value of a wheel side slip angle,the upper limit calculation unit is further configured to set a prescribed value for the slip stiffness, which prescribed value makes an extent of change in the lateral force relative to the wheel side slip angle higher than a prescribed extent of change in the lateral force, andthe control unit is further configured to control the longitudinal force so that a value for the calculated slip stiffness does not exceed the prescribed value for the slip stiffness.