摘要:
A vehicle stability control apparatus calculates a desired yaw rate from the angle of the steering wheel and vehicle's velocity and always executes control so as to have the actual yaw rate correspond to the desired yaw rate. Both of the front wheels' braking force and the rear wheels' braking force are operated according to the amendment momentum calculated by a control in response to the yaw rate difference. However, the actual yaw rate cannot be accurately corresponded to the desired yawing moment without delay when the driver operates a steering wheel rapidly in the emergency evasion condition, the control unit increases the amendment momentum right after the emergency evasion condition. Furthermore, the control unit decreases the amendment momentum when the vehicle is converging on straight-ahead driving.
摘要:
A traction control system is provided which is applicable to a four-wheel drive vehicle in which a torque split system is incorporated. The torque split system is operable to distribute engine torque to front and rear wheels by an engine torque distribution ratio of front to rear wheels variable based on a difference in rotational speeds between the front and rear wheels. The traction control system is responsive to a slippage ratio of the rotational speeds of the wheels to a vehicle speed greater than a preselected threshold to reduce engine torque to control the traction of the wheels. Therefore, the traction control is effectively carried out while ensuring yaw control of a vehicle body by means of the torque split control.
摘要:
A control system for controlling a differential (or slip) limiting force of a limited slip differential of a vehicle comprises a sensor group for sensing a vehicle speed and a wheel speed difference between rotational speeds of left and right drive wheels, and a controller for controlling the differential limiting force by controlling a clutch engagement force of a differential limiting clutch. To improve both of a driving capability on a split friction road surface or a rough road and a vehicle stability in the high speed range, the controller increases the differential limiting force with increase in the wheel speed difference according to a preset control characteristic, and modifying the control characteristic between the differential limiting force and the wheel speed difference so that the differential limiting force tends to be lower when the vehicle speed becomes higher.
摘要:
A control system for a limited-slip differential gear unit is cooperative with a traction control system to provide better vehicle driving stability. The control system for a limited-slip differential gear unit is capable of optimizing driving torque transmission characteristics for improving cornering stability of the vehicle. The limited-slip differential gear unit control system, according to the invention, is operative in response to difference of wheel slippages at driven wheels for slip limiting force in order to adjust wheel slippage of heavier load driven wheel at a predetermined value. The control system is cooperative with a traction control system which is detective of wheel slippage due to wheel spinning caused by excessive driving torque to be applied to the driven wheels and adjusting the driving torque to be distributed to the driven wheels.
摘要:
A four wheel drive system has an interaxle multiple disc friction clutch, an actuator for varying torque transmitted through the clutch to a front wheel drive shaft by varying a clutch pressure of the clutch, first and second sensors for sensing rotational speeds of the front wheel and rear wheel drive shafts, a third element for producing a third signal, and a control unit for controlling a driving torque distribution between the front and rear wheel drive shafts by sending a control signal to the actuator. The control means increases the torque transmitted through the clutch with increase in a speed difference between the front wheel and rear wheel drive shafts in accordance with one of characteristics selected in accordance with the third signal. The third element is designed to find a condition of the vehicle which can be controlled by a driver of the vehicle, and may take the form of an accelerator position sensor or a manually operated selector switch.
摘要:
In a vehicle dynamics control apparatus capable of balancing a vehicle dynamics stability control system and a lane deviation prevention control system, a cooperative control section is provided to make a cooperative control between lane deviation prevention control (LDP) and vehicle dynamics stability control (VDC). When a direction of yawing motion created by LDP control is opposite to a direction of yawing motion created by VDC control, the cooperative control section puts a higher priority on VDC control rather than LDP control. Conversely when the direction of yawing motion created by LDP control is identical to the direction of yawing motion created by VDC control, a higher one of the LDP desired yaw moment and the VDC desired yaw moment is selected as a final desired yaw moment, to prevent over-control, while keeping the effects obtained by both of VDC control and LDP control.
摘要:
In lane keep control apparatus and method for an automotive vehicle, a deceleration controlled variable is calculated on the basis of a state of a tendency of a vehicular deviation from a traffic lane on which the vehicle is traveling and a braking force acted upon each of driven wheels of the vehicle is controlled on the basis of the calculated deceleration controlled variable.
摘要:
In a vehicle dynamics control apparatus enabling vehicle dynamics control and lane deviation prevention control, a processor of a control unit is programmed for determining a driving stability including a vehicle driveability and a vehicle stability, based on at least a steer angle, and for executing the vehicle dynamics control by producing a yaw moment corresponding to a controlled variable of the vehicle dynamics control when the driving stability is deteriorated, and for executing the lane deviation prevention control by producing a yaw moment corresponding to a controlled variable of the lane deviation prevention control when there is a possibility of lane deviation. The processor is further programmed for softening a criterion, which is used to determine the driving stability, based on the controlled variable of the lane deviation prevention control, only when the vehicle dynamics control is inoperative.
摘要:
A lane deviation avoidance system for an adaptive cruise control system equipped vehicle includes an electronic control unit that executes a host vehicle's lane deviation avoidance control in which a change in vehicle dynamic behavior occurs in a direction that avoids the host vehicle from deviating from a driving lane when there is a possibility of the host vehicle's lane deviation from the driving lane. The control unit puts a priority on the lane deviation avoidance control by limiting a driving force acting on the host vehicle, when there is the possibility of the host vehicle's lane deviation from the driving lane.
摘要:
In an automotive lane deviation avoidance system that prevents a host vehicle from deviating from its driving lane by correcting the host vehicle's course in a direction that avoids the host vehicle's lane deviation in the presence of a possibility of the host vehicle's lane deviation, the system calculates a desired yawing moment needed to avoid the host vehicle's lane deviation from the driving lane. The system compensates for the desired yawing moment by a correction factor or a gain, which is determined based on a throttle opening of the host vehicle.