Vehicle behavior control device

摘要

To improve vehicle stability by starting control based on quicker detection of the possibility that a vehicle state will reach an unstable region. It is detected that a vehicle is in a pre-skid state that is the state prior to when the vehicle reaches an unstable region where skid occurs, and brake force is generated in a rear wheel at an outside of a turn when the pre-skid state is detected. As a result of generating this brake force, load applied to the wheels at the outside of the turn increases and lateral force of the vehicle increases. Thus, it is possible to make it more difficult for skid of the vehicle to occur, and so it is possible to inhibit, in advance, gentle deterioration in vehicle behavior such as slow spin. Accordingly, the possibility that a vehicle state has reached an unstable region can be detected earlier.

主权项

1. A vehicle behavior control device comprising:
a state amount calculation means for calculating a state that is taken as an index of a skid state of a vehicle; a skid state determination means for determining whether the vehicle is in an unstable state by comparing a vehicle state with an unstable region in which it is indicated that the vehicle in a skid state, the unstable region being pre-determined based on the state amount calculated by the state amount calculation means; a stable state determination means for determining whether the vehicle is in a stable state by comparing the vehicle state with a stable region in which it is indicated that the vehicle is not in a skid state, the stable region being pre-determined based on the state amount calculated by the state amount calculation means; a transition region determination means for determining whether the vehicle is in a pre-skid state by comparing the vehicle state with a pre-skid transition region which is located between the unstable region and the stable region and in which it is indicated the vehicle is in a pre-skid state in which it can be anticipated that the vehicle will skid at future time, the pre-skid transition region being pre-determined based on the state amount calculated by the state amount calculation means; an anti-skid control means for performing anti-skid control by applying brake force to a front wheel at an outside of a turn and a rear at the outside of the turn when the skid state determination means determines that the vehicle state is in the unstable region; and a pre-skid control means for performing a pre-skid control that applies brake force only to the rear wheel at the outside of the turn when the transition region determination means determines that the vehicle is in the skid transition region.