Abstract: A vehicle motion control apparatus includes a first means applying a first braking force to an outer wheel, relative to a turning direction, for suppressing oversteer when the vehicle is judged to be skidding in vehicle turning movement, a second means obtaining a state of a driver's steering operation in the vehicle turning movement, a third means applying a second braking force, set to be smaller than the first braking force, to a wheel located at a horizontally opposite side of the outer wheel to which the first braking force is applied, when the state of the driver's steering operation is judged to be in a steering turning back state, in which a steering wheel is turned from a turning direction to a reverse direction of the turning direction, based on the state of the driver's steering operation obtained by the second means.

Abstract: A steering control apparatus for a vehicle having a power source for generating power, and drive shafts for transferring the power to driving wheels of the vehicle, and a traction control device for controlling braking torque applied to the wheels. The apparatus comprises a detection device for detecting the braking torque applied to the wheels, a calculation device for calculating a driving force difference between the wheels, on the basis of the detected braking torque, a power source state detection device for detecting an actuating state of the power source, and a control device for controlling steering torque created by the steering wheel, and applying torque steer reducing torque to the steering wheel. A desired value of the torque steer reducing torque is determined, based on the driving force difference and the actuating state of the power source.

Abstract: A vehicle motion control apparatus includes hydraulic pressure applying means for applying hydraulic pressure to a wheel cylinder side of any of plural solenoid valves, respectively arranged between a master cylinder and plural wheel cylinders, for the corresponding wheel cylinders even when an operator of the vehicle does not operate a brake operation member, motor controlling means for controlling an output of the electric motor to be reduced in accordance with a condition of a road surface when the hydraulic pressure is applied to the wheel cylinder, and valve controlling means for controlling the operation of the solenoid valve to increase an amount of the brake fluid flown by the operation of the solenoid valve before the output of the electric motor is reduced when the output of the electric motor is controlled to be reduced.

Abstract: A steering device is provided for controlling steering torque applied to a steering wheel of a vehicle. A braking device is provided for controlling longitudinal force applied to each wheel, and a control device is provided for performing at least one of an anti-skid control and a traction control. It is observed whether the control device is performing the control on a split road surface. The steering torque is controlled on the basis of a difference of longitudinal force applied to the right and left wheels, and a turning state amount deviation between a turning state amount and a desired amount thereof. The desired amount of turning state is calculated, on the basis of the turning state of the vehicle obtained when one of the anti-skid control and the traction control is performed on the split road surface.

Abstract: A vehicle motion control apparatus includes a motion controlling process operating a pump for supplying brake fluid between a pressure difference control valve and a pressure increasing control valve and controlling the pressure difference control valve and the pressure increasing control valve, thereby pressurizing the wheel cylinder of the wheel to be controlled, a control amount adjusting process reducing a control amount of a motor when a frictional coefficient of a road surface is small, a load judging process judging a load condition of the motor when determining to reduce the control amount of the motor, and a pressure difference controlling process reducing the pressure difference when the load of the motor is in a high load condition.

Abstract: The vehicle motion control device of the invention utilizes that the detected lateral acceleration Gyd based upon the output from the lateral acceleration sensor takes a value obtained by adding a value corresponding to the roll angle to the actual lateral acceleration based upon the centrifugal force exerted on the vehicle and that the actual lateral acceleration can accurately be calculated and estimated, as the estimated lateral acceleration Gye, based upon the output from the yaw rate sensor, whereby this device judges that there is a tendency in which an excessive roll angle occurs on the vehicle to thereby execute the predetermined roll-over preventing control, when the increasing speed of the detected lateral acceleration Gyd exceeds the first predetermined value and the increasing speed of the estimated lateral acceleration Gye becomes smaller than the second predetermined value (<first predetermined value), i.e.

Abstract: A steering device is provided for controlling steering torque applied to a steering wheel of a vehicle. A braking device is provided for controlling longitudinal force applied to each wheel, and a control device is provided for performing at least one of an anti-skid control and a traction control. It is observed whether the control device is performing the control on a split road surface. The steering torque is controlled on the basis of a difference of longitudinal force applied to the right and left wheels, and a turning state amount deviation between a turning state amount and a desired amount thereof. The desired amount of turning state is calculated, on the basis of the turning state of the vehicle obtained when one of the anti-skid control and the traction control is performed on the split road surface.

Abstract: A steering control apparatus is provided for a vehicle having a steering wheel for steering steered wheels of the vehicle, a power source for generating power, and drive shafts for transferring the power to the steered wheels, to be served as driving wheels of the vehicle. The apparatus comprises an accelerating operation detection device for detecting accelerating operation amount by a vehicle driver, and a steering torque control device for controlling steering torque created by the steering wheel, and applying torque steer reducing torque to the steering wheel. The steering torque control device is adapted to reduce torque steer, which is transiently created on the steering wheel due to characteristics of the drive shafts, when the accelerating operation amount detected by the accelerating operation detection device becomes equal to or greater than a predetermined value.

Abstract: A steering control apparatus is provided for a vehicle having a steering wheel for steering its steered wheels, a power source for generating power, and drive shafts for transferring the power to the wheels, to be served as driving wheels of the vehicle, and a traction control device for controlling braking torque applied to the wheels. The apparatus comprises a detection device for detecting the braking torque applied to the wheels, a calculation device for calculating a driving force difference between the wheels, on the basis of the detected braking torque, a power source state detection device for detecting an actuating state of the power source, and a control device provided for controlling steering torque created by the steering wheel, and applying torque steer reducing torque to the steering wheel. A desired value of the torque steer reducing torque is determined, on the basis of the driving force difference and the actuating state of the power source.

Abstract: A target vehicle speed is switched between a target slip vehicle speed and a target torque vehicle speed on the basis of a result of a determination regarding whether or not a vehicle is insufficiently accelerated. More specifically, if traction control is not performed, the target slip vehicle speed is set as the target vehicle speed. If it is determined that the vehicle is sufficiently accelerated during traction control, a value obtained by subtracting a maximum permissible value from a value set last time as the target vehicle speed is compared with the target slip vehicle speed, and the larger one of them is set as the target vehicle speed this time.

Abstract: A hydraulic pressure regulating device is disposed between a master cylinder and a pair of wheel cylinders included in each of a dual hydraulic circuit. A desired value is provided for a wheel cylinder operatively associated with a wheel to be controlled, on the basis of state variable monitored by a monitor. The desired value for at least one wheel cylinder in a hydraulic circuit including the wheel cylinder for the wheel to be controlled, is modified at least in response to operation of a brake pedal to provide a modified desired value. When the brake pedal is operated, the regulating device is controlled in response to a result of comparison between the modified desired value and the state variable, to regulate the pressure in at least one wheel cylinder included in the hydraulic circuit.

Abstract: In a motion control system for a vehicle having four wheels including at least two driving wheels which is driven by a driving power source, first rolling liability judging means (step 112) judges whether or not the rolling liability detected by rolling liability detecting means (step 102, a lateral acceleration sensor 39) for detecting the rolling liability of the vehicle is equal to or greater than a first predetermined rolling liability, and rolling suppression control means (steps 116, 124 to 129) suppresses the rolling liability of the vehicle by increasing the driving force of any of the driving wheels when the first rolling liability judging means judges that the rolling liability detected by the rolling liability detecting means is equal to or greater than the first predetermined rolling liability.

Abstract: A rolling motion stability control apparatus restrains a roll increasing tendency of a vehicle, with each wheel of the vehicle being braked by a wheel brake device. A first braking force control device is provided for applying a first braking force to the wheel, when the vehicle is turned to one direction. A second braking force control device is provided for applying a second braking force to the wheel, when the vehicle is turned to the other direction. A terminating control adjustment device is provided for adjusting the braking force control devices to continue the first braking force being applied, until the second braking force is initiated to be applied, when the vehicle is turned to the one direction, and then to the other direction.

Abstract: In rollover prevention control, an inner front wheel braking force is generated only in a front wheel located on the radially inner side of a turning locus in a relatively early stage where the absolute value of actual lateral acceleration is between a first value and a second value. When the absolute value becomes greater than the second value, in addition to the inner front wheel braking force, an inner rear wheel braking force is generated in a rear wheel located on the radially inner side of the turning locus. When the absolute value becomes greater than a third value, in addition to the inner rear wheel breaking wheel, an outer wheel braking force is generated in the front wheel located on the radially outer side of the turning locus. Thus, an increase in the roll angle is suppressed, and a desired turning locus tracing performance is maintained satisfactorily.

Abstract: The present invention is directed to a vehicle motion control apparatus, which includes normally open valves to supply hydraulic pressure discharged from a master cylinder into wheel brake cylinders, normally closed valves to reduce wheel cylinder pressure, and a proportional pressure difference valve which is disposed between the master cylinder and the normally open valves, to regulate a pressure difference between the hydraulic pressure at the side of the master cylinder and the hydraulic pressure at the side of the normally open valves to be of a desired value. A pressure generating device is provided for generating the hydraulic pressure independently of the master cylinder to supply it into a passage between the pressure difference valve and the normally open valves. The hydraulic pressure in one of the wheel brake cylinders in one hydraulic circuit is regulated on the basis of monitored vehicle state variable.

Abstract: A control of a vehicle motion control device 10 is as follows during an oversteer restraining control. Specifically, when tire inflation pressure is appropriate, the device sets braking force exerted on each of front and rear wheels at the outer side of the turning direction so as to be reference braking forces Ff1 and Fr1, that are generated when an absolute value of a lateral acceleration deviation ?Gy is not less than a reference value a1 and that respectively increase up to an upper limit value ff and upper limit value fr in accordance with the increase in the absolute value of the lateral acceleration deviation ?Gy.

Abstract: An angular velocity detection device is provided for detecting an angular velocity about a single axis tilted in a longitudinal direction of a vehicle to a normal axis thereof. An actual motion state variable of the vehicle is calculated on the basis of the detected angular velocity. At least one of the braking force and driving force applied to a vehicle is controlled to stabilize a yawing motion and a rolling motion of the vehicle, on the basis of a motion state variable deviation between a desired motion state variable and the actual motion state variable, e.g., a deviation between a yaw velocity and a roll velocity of the vehicle.

Abstract: A rolling motion stability control apparatus restrains a roll increasing tendency of a vehicle, with each wheel of the vehicle being braked by a wheel brake device. A first braking force control device is provided for applying a first braking force to the wheel, when the vehicle is turned to one direction. A second braking force control device is provided for applying a second braking force to the wheel, when the vehicle is turned to the other direction. A terminating control adjustment device is provided for adjusting the braking force control devices to continue the first braking force being applied, until the second braking force is initiated to be applied, when the vehicle is turned to the one direction, and then to the other direction.

Abstract: According to a roll increasing tendency estimation apparatus, a state variable is calculated in response to magnitude of a rolling moment of the vehicle, to provide a roll input magnitude, and a state variable is calculated in response to variation in time of the rolling moment, to provide a roll input velocity. A roll increasing tendency of a vehicle is estimated on the basis of a relationship between the calculated roll input magnitude and the calculated roll input velocity. On the basis of a relationship between the roll input magnitude and roll input velocity, at least one of a braking force control and a driving force control may be performed, to restrain the roll increasing tendency of the vehicle.

Abstract: A rolling motion stability control apparatus restrains a roll increasing tendency of a vehicle, with each wheel of the vehicle being braked by a wheel brake device. A first braking force control device is provided for applying a first braking force to the wheel, when the vehicle is turned to one direction. A second braking force control device is provided for applying a second braking force to the wheel, when the vehicle is turned to the other direction. References for starting controls of the first and second braking force control devices are set to be of predetermined values, respectively. The reference for starting the control of the second braking force control device is modified to be smaller than a predetermined value, when the vehicle is turned to the one direction.