摘要:
Arrangements (e.g., method, apparatus, computer-readable non-transitory media embodying a program) for compensating for understeer or oversteer behavior in a vehicle having a fully active suspension, including: determining whether an understeer or oversteer condition exists; determining a compensation torque needed to correct the understeer or oversteer condition; and generating the compensation torque by using the fully active suspension to shift tire loads between tires.
摘要:
A method of controlling drivability of a vehicle detects an overall load acting on the vehicle. A mass of the vehicle or an estimate thereof is obtained. A controller determines whether the vehicle is negotiating a curve during a driving situation. If the vehicle is negotiating a curve during the driving situation, the controller determines whether the vehicle has a tendency to oversteer or to understeer. The load acting on the vehicle is dynamically changed or a suspension stiffness of the vehicle is dynamically adjusted to reduce the tendency of the vehicle to oversteer or to understeer.
摘要:
An apparatus for quickly and accurately determining a counter steer state of a vehicle is provided. The apparatus comprises a turning direction obtaining unit 70 obtaining a turning direction of a vehicle, an oversteer state determination unit 71 determining whether the vehicle is in an over steer state, a steering angle based yaw rate obtaining unit 72 obtaining a steering angle based yaw rate to be determined based at least on a steering angle, a lateral acceleration based yaw rate obtaining unit 73 based at least on a lateral acceleration, a counter steer state determination unit 74 determining that the vehicle is in a counter steer state against the vehicle turning in the vehicle turning direction if the steering angle based yaw rate obtained by the steering angle based yaw rate obtaining unit 72 is smaller than the lateral acceleration based yaw rate obtained by the lateral acceleration based yaw rate obtaining unit 73 when the oversteer state determination unit 71 determines that the vehicle is in the oversteer state for the vehicle turning in the vehicle turning direction obtained by the turning direction obtaining unit 70.
摘要:
The counter steer detecting method includes the steps of detecting a steering angle by a steering angle sensor, detecting a lateral acceleration by a lateral acceleration sensor, and determining counter steer according to the steering angle detected by the steering angle sensor and the lateral acceleration detected by the lateral acceleration sensor on the basis of a counter steer determination area table indicating whether or not the counter steer is on in relation to the combination of steering angle and lateral acceleration.
摘要:
Controllable dampers are used to improve vehicle responses and stability during severe vehicle handling maneuvers. A total handling damping value for the vehicle is derived, preferably from the greatest of a yaw rate error value, a lateral acceleration value and a time derivative of lateral acceleration value. In addition, a control ratio of front axle roll damping to total roll damping is derived, preferably from the yaw rate error value, an oversteer/understeer indication and possibly vehicle speed. From these values, handling damping values are derived for each wheel of the vehicle and blended with damping values for the same wheels derived from suspension component movement to determine a corner damping command for each controllable damper. Preferably, the damping values derived from suspension component movement are shifted away from damping control of the vehicle body toward handling damping control when yaw rate error is large in magnitude.
摘要:
A control apparatus for controlling the twisting amount of a stabilizer provided between left and right wheels of a vehicle in accordance with the vehicle running state. The control apparatus includes a hydraulic cylinder unit coupled between one end portion of the twistable stabilizer and one of the wheels and the cylinder unit has a cylinder body and a piston slidable therein to be expandable and contractable in accordance with movements of the piston. Also included in the apparatus is a hydraulic actuator comprising control valves and coupled to the cylinder unit to control a position of the piston, the position thereof corresponding to the twisting amount of the stabilizer and being detectable by a position sensor. A control unit determines a predetermined stable condition of the vehicle on the basis of a steering angle of a steering wheel, which is detectable by a steering sensor, and obtains a neutral position of the piston taken under the condition that the vehicle is in the predetermined stable condition. Further, the control unit determines a turning state of the vehicle on the basis of the steering angle and to determine a target piston position with respect to the neutral position in accordance with the degree of the vehicle turning state, then outputting a control signal to the actuator so that the piston assumes the target piston position.
摘要:
Arrangements (e.g., method, apparatus, computer-readable non-transitory media embodying a program) for compensating for understeer or oversteer behavior in a vehicle having a fully active suspension, including: determining whether an understeer or oversteer condition exists; determining a compensation torque needed to correct the understeer or oversteer condition; and generating the compensation torque by using the fully active suspension to shift tire loads between tires.
摘要:
A yaw stability control system (18) is enhanced to include roll stability control function for an automotive vehicle and includes a plurality of sensors (28–39) sensing the dynamic conditions of the vehicle. The sensors may include a speed sensor (20), a lateral acceleration sensor (32), a yaw rate sensor (28) and a longitudinal acceleration sensor (36). The controller (26) is coupled to the speed sensor (20), the lateral acceleration sensor (32), the yaw rate sensor (28) and a longitudinal acceleration sensor (36). The controller (26) generates both a yaw stability feedback control signal and a roll stability feedback control signal. The priority of achieving yaw stability control or roll stability control is determined through priority determination logic. If a potential rollover event is detected, the roll stability control will take the priority. The controller for roll stability control function determines a roll angle of the vehicle from the lateral acceleration sensor signal and calculates the feedback control signal based on the roll angle.
摘要:
A yaw stability control system (18) is enhanced to include roll stability control function for an automotive vehicle and includes a plurality of sensors (28–39) sensing the dynamic conditions of the vehicle. The sensors may include a speed sensor (20), a lateral acceleration sensor (32), a yaw rate sensor (28) and a longitudinal acceleration sensor (36). The controller (26) is coupled to the speed sensor (20), the lateral acceleration sensor (32), the yaw rate sensor (28) and a longitudinal acceleration sensor (36). The controller (26) generates both a yaw stability feedback control signal and a roll stability feedback control signal. The priority of achieving yaw stability control or roll stability control is determined through priority determination logic. If a potential rollover event is detected, the roll stability control will take the priority. The controller for roll stability control function determines a roll angle of the vehicle from the lateral acceleration sensor signal and calculates the feedback control signal based on the roll angle.