摘要:
A vehicle orientation control device is provided in a four wheel drive vehicle capable of applying braking and driving force to each of the vehicle wheels. The vehicle orientation control device (24) is provided in a vehicle control device (10) for controlling the four wheel drive vehicle and includes a standard yaw rate calculating unit (25), a yaw rate sensor (22), a target yaw moment calculating unit (26), a braking and driving force commanding unit (15), and a yaw moment control unit (27). The yaw moment control unit (27) includes an allocation ratio varying unit (27a) for continuously changing the front and rear allocation ratio of the yaw moment control torque to be distributed to the front and rear wheels (3) and (2) in dependence on the detected actual yaw rate that is detected by the yaw rate sensor (22).
摘要:
A control system to generate a yaw torque of an all-wheel drive vehicle comprises a brake control module 18. The brake control module 18 determines the desired powertrain torque 44 for the vehicle 10 based upon a plurality of factors including available torque from the powertrain. The brake control module 18 determines a first torque 44 and a second torque 26, wherein the first torque 44 and the second torque 26 are combined to provide the total desired yaw torque 49 of the vehicle 10. The first torque 44 is generated between wheels of the vehicle 10 by applying torque 44 from the powertrain 14 to different wheels 21 of the vehicle 10 and the second torque 26 is generated by applying different braking torque from a braking system 16 of the vehicle 10.
摘要:
Braking/driving force control that includes: detecting a driver's operating state for causing the vehicle to run; detecting a vehicle body motional state while the vehicle is running; computing a target longitudinal driving force for causing the vehicle to run and motional state amounts for controlling a vehicle body behavior on the basis of the detected operating state and motional state; and computing driving or braking forces allocated to the wheels so as to achieve the computed target longitudinal driving force and target motional state amounts and that the braking/driving force generating mechanism causes the wheels to generate independently.
摘要:
In an apparatus for detecting a skid occurred on a four-wheel drive vehicle having a prime mover and a transmission, an actual rear right/left wheel speed ratio between the rear right/left wheel speeds is calculated based on detected front and rear wheel rotational speeds, a front/rear wheel slip ratio during grip-driving is calculated by retrieving characteristics of a front/rear wheel slip ratio set with respect to a rear right/left wheel speed ratio using the calculated actual rear right/left wheel speed ratio, an actual front/rear wheel slip ratio is calculated based on the detected front wheel rotational speed and the rear wheel rotational speed, and occurrence of skid is then determined based on a difference between the calculated front/rear wheel slip ratio during grip-driving and the calculated actual front/rear wheel slip ratio.
摘要:
The invention provides a method of progressive engagement of all-wheel drive for a mobile vehicle. A set of vehicle parameters is sensed, and an all-wheel drive lock value is determined based on the sensed set of vehicle parameters. Vehicle subsystem control activation is determined, and the all-wheel drive lock value is adjusted based on the vehicle subsystem control activation determination. An all-wheel drive controller is engaged based on the adjusted all-wheel drive lock value.
摘要:
The embodiments of the present application disclose a stability control system and a stability control method for a four-wheel drive electric vehicle and the four-wheel drive electric vehicle. In the stability control system, when the lateral acceleration is equal to or greater than an acceleration threshold, at least one of a first braking force signal, a second braking force signal, a first logic signal and a second logic signal is obtained. When the first logic signal is obtained, the body of the electric vehicle is controlled to keep stable. When the first braking force signal and the second logic signal are obtained, a motor is controlled to apply braking force to an outside front wheel. When the second braking force signal and the second logic signal are obtained, motors are controlled to apply braking force to the outside front wheel and an inside rear wheel.
摘要:
Embodiments of the present invention provide a vehicle sideslip control system for maintaining a non-zero value of sideslip whilst cornering. The system comprises a vehicle sideslip controller operable automatically to control the vehicle to apply a positive or negative torque to one or more wheels of the vehicle in such a manner as to maintain the non-zero value of sideslip.
摘要:
A vehicle dynamics control (VDC) apparatus for an automotive vehicle with a differential limiting device capable of limiting at least one of a differential motion between front and rear wheel axles and a differential motion between left and right wheel axles, includes a VDC system that controls a braking force of at least one of road wheels to control vehicle cornering behavior depending on a vehicle's turning condition independently of a driver's braking action. The VDC system advances a VDC initiation timing used in a differential limited state in which at least one of the front-and-rear wheel axle differential motion and the left-and-right wheel axle differential motion is limited, in comparison with a VDC initiation timing used in a differential non-limited state in which the front-and-rear wheel axle differential motion and the left-and-right wheel axle differential motion are allowed.
摘要:
Improved methods of controlling the stability of a vehicle are provided via the cooperative operation of vehicle stability control systems such as an Active Yaw Control system, Antilock Braking System, and Traction Control System. These methods use recognition of road surface information including the road friction coefficient (mu), wheel slippage, and yaw deviations. The methods then modify the settings of the active damping system and/or the distribution of drive torque, as necessary, to increase/reduce damping in the suspension and shift torque application at the wheels, thus preventing a significant shift of load in the vehicle and/or improving vehicle drivability and comfort. The adjustments of the active damping system or torque distribution temporarily override any characteristics that were pre-selected by the driver.
摘要:
A motion control apparatus for a four-wheel drive vehicle performs over-steer suppressing control when the vehicle is in an over-steer state so as to apply a braking force to a front wheel located on the outer side of a turning locus without lowering engine output, and performs LSD control for the front/rear wheels when the obtained difference between wheel speeds of the left and right wheels exceeds an allowable limit so as to apply a braking force for suppressing idle rotation to the one of the left and right wheels that is of higher wheel speed. During execution of the over-steer suppression control, the braking force for suppressing front-wheel idle rotation to be imparted to the front wheel located on the inner side of the turning locus by means of the front-wheel-side LSD control is lowered, whereby the rear wheels become unlikely to produce excessive idle rotation.