Abstract: The present invention is directed to a vehicle motion control apparatus, which includes a hydraulic pressure regulating device disposed between a master cylinder and a pair of wheel brake cylinders included in each of a dual hydraulic circuit, and a monitor for monitoring state variable of the vehicle. A desired value is provided for a wheel brake cylinder operatively associated with a wheel to be controlled, on the basis of the state variable. The regulating device is controlled in response to a result of comparison between the desired value and the state variable, to regulate the pressure in at least the wheel brake cylinder operatively associated with said wheel to be controlled. A pressure increasing gradient of the hydraulic braking pressure in the wheel brake cylinder operatively associated with the wheel to be controlled, is set in response to a result of comparison between the desired value and the state variable.

Abstract: This device sets, upon executing only a roll-over preventing control, roll-over preventing braking force exerted on a front wheel at the outer side of the turning direction based upon a table value obtained through an absolute value |Gy| of an actual lateral acceleration and a predetermined table, and sets, upon executing only an US restraining control, US restraining braking force exerted on a rear wheel at the inner side of the turning direction based upon a table value obtained through an absolute value |?Gy| of a lateral acceleration deviation, that is a deviation between a target lateral acceleration and the actual lateral acceleration, and a predetermined table.

Abstract: A first state variable indicative of a rolling motion of a vehicle and a second state variable indicative of a different rolling motion of the vehicle from the first state variable are acquired. A roll increasing tendency of the vehicle is estimated on the basis of a characteristic including the second state variable. At least one of a braking force control and a driving force control is performed to restrain the roll increasing tendency of the vehicle, on the basis of the first state variable acquired when the roll increasing tendency is estimated.

Abstract: In the case where the absolute value of steering angle ?s is equal to or greater than a prescribed angle, a motion control apparatus 10 for a vehicle sets a control gear ratio n in such a manner that when an estimated vehicle-body speed Vso is equal to or greater than a prescribed value, the control gear ratio n becomes a value which is equal to or greater than “20” and which increases with the estimated vehicle-body speed Vso as the absolute value of the steering angle ?s increases, and when the estimated vehicle-body speed Vso is less than the prescribed value, the control gear ratio n becomes a value which is not greater than “20” and which decreases with the estimated vehicle-body speed Vso as the absolute value of the steering angle ?s increases. The apparatus then calculates a target yaw rate Yrt by making use of an equation shown in Step 510 and using the control gear ratio n, and controls a braking force applied to each wheel so that the actual yaw rate Yr coincides with the target yaw rate Yrt.

Abstract: A steering apparatus for a vehicle calculates an assist force F1 corresponding to a steering torque T of a driver on the basis of a table shown in Step 605 in such a manner that the assist force F1 changes in proportion to the steering torque T, and further calculates a coefficient Kt corresponding to the absolute value of an actual lateral acceleration Gy on the basis of a table shown in Step 610. The apparatus calculates a final assist force F through multiplication of the assist force F1 by the coefficient Kt, and controls an electric motor of a steering actuator so as to generate the final assist force F for the steering operation of the driver. As a result, when the absolute value of the actual lateral acceleration Gy is not less than a value Gyth, the final assist force F decreases with an increase in the absolute value, whereby abrupt steering operation by the driver can be avoided.

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: The present invention is directed to a vehicle motion control apparatus, which includes a hydraulic pressure regulating device disposed between a master cylinder and a pair of wheel brake cylinders included in each of a dual hydraulic circuit, and a monitor for monitoring state variable of the vehicle. It is determined whether a wheel out of the wheels operatively associated with the pair of wheel brake cylinders is located on the inside of a curve along which the vehicle is turning, or located on the outside of the curve. Also, a state of road holding of the wheel located on the inside of the curve is determined. A desired value for the wheel located on the outside of the curve is set at least on the basis of the road holding determination.

Abstract: A motion control device 10 for a vehicle exerts braking force only on the rear wheel at the inner side of the turning direction for generating a yawing moment on the vehicle only in the turning direction of the vehicle when an absolute value of an actual lateral acceleration Gy is not more than a value Gyth, i.e., when there is a small possibility of the occurrence of an excessive roll angle on the vehicle body, in case where the turning state of the vehicle is the understeer state. On the other hand, it exerts braking force not only on the rear wheel at the inner side of the turning direction, but also on the front and rear wheels at the outer side of the turning direction for generating a yawing moment in the direction opposite to the turning direction too, when the absolute value of the actual lateral acceleration Gy exceeds the value Gyth, i.e.

Abstract: A vehicle motion control apparatus is provided for controlling a braking force applied to each wheel in response to a vehicle state, and controlling a driving force transmitted from an internal combustion engine to driven wheels, to perform a vehicle stability control. The apparatus includes a vehicle state monitor for monitoring state variable of the vehicle, a braking force control device for controlling the braking force applied to each wheel on the basis of the state variable monitored by the vehicle state monitor, an engine output control device for controlling the driving force transmitted to the driven wheels on the basis of the state variable monitored by the vehicle state monitor, and a braking operation detection device for detecting a braking operation by a driver of the vehicle.

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 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: This device sets, upon executing only a roll-over preventing control, roll-over preventing braking force exerted on a front wheel at the outer side of the turning direction based upon a table value obtained through an absolute value |Gy| of an actual lateral acceleration and a predetermined table, and sets, upon executing only an US restraining control, US restraining braking force exerted on a rear wheel at the inner side of the turning direction based upon a table value obtained through an absolute value |?Gy| of a lateral acceleration deviation, that is a deviation between a target lateral acceleration and the actual lateral acceleration, and a predetermined table.

Abstract: The present invention is directed to a vehicle motion control apparatus, which includes a hydraulic pressure regulating device disposed between a master cylinder and a pair of wheel brake cylinders included in each of a dual hydraulic circuit, and a monitor for monitoring state variable of the vehicle. A desired value is provided for a wheel brake cylinder operatively associated with a wheel to be controlled, on the basis of the state variable. The regulating device is controlled in response to a result of comparison between the desired value and the state variable, to regulate the pressure in at least the wheel brake cylinder operatively associated with said wheel to be controlled. A pressure increasing gradient of the hydraulic braking pressure in the wheel brake cylinder operatively associated with the wheel to be controlled, is set in response to a result of comparison between the desired value and the state variable.

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 the 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.

Abstract: The present invention is directed to a vehicle motion control apparatus, which includes a hydraulic pressure regulating device disposed between a master cylinder and a pair of wheel brake cylinders included in each of a dual hydraulic circuit, and a monitor for monitoring state variable of the vehicle. A desired value is provided for a wheel brake cylinder operatively associated with a wheel to be controlled, on the basis of the state variable. And, the desired value for at least one wheel brake cylinder in a hydraulic circuit including the wheel brake 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. The regulating device is controlled in response to a result of comparison between the desired value and the state variable, to regulate the pressure in the wheel brake cylinder for the wheel to be controlled.

Abstract: The present invention is directed to a vehicle motion control apparatus, which includes a hydraulic pressure regulating device disposed between a master cylinder and a pair of wheel brake cylinders included in each of a dual hydraulic circuit, and a monitor for monitoring state variable of the vehicle. It is determined whether a wheel out of the wheels operatively associated with the pair of wheel brake cylinders is located on the inside of a curve along which the vehicle is turning, or located on the outside of the curve. Also, a state of road holding of the wheel located on the inside of the curve is determined. A desired value for the wheel located on the outside of the curve is set at least on the basis of the road holding determination.

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: In the roll-over preventing control, a vehicle motion control device 10 causes inner-wheel braking force, according to the absolute value of an actual lateral acceleration Gy, only on the rear wheel at the inner side of the turning direction when the absolute value |Gy| of the actual lateral acceleration is not less than a rear-wheel-side reference value Gyr and not more than a front-wheel-side reference value Gyf thereby causing height lowering force at the vehicle rear-side section of the inner side of the turning direction.

Abstract: This control device for a vehicle obtain a cant amount CANT by subtracting, from a detected actual lateral acceleration Gy, an estimated lateral acceleration Gyest corresponding to centrifugal force due to a turning run, calculated based upon the difference between the wheel speed at the left side of the vehicle body and the wheel speed at the right side of the vehicle body, by utilizing the fact that a lateral acceleration sensor 54 that detects the detected actual lateral acceleration Gy according to a component of external force (centrifugal force, gravity or the like) exerted on the vehicle detects, as the detected actual lateral acceleration Gy, the acceleration whose absolute value is greater than the absolute value of the actual lateral acceleration (≠0) actually exerted on the vehicle (based upon the centrifugal force due to the turning run), that is running approximately straight, by the amount according to the cant amount CANT in the body roll direction of the road surface.

Abstract: A hydraulic brake pressure controller and method for pressure increase in a wheel cylinder of a hydraulic brake pressure controller is adapted to obtain favorable ABS control performance in light of the vehicle driving road surface and the stepping force of the brake pedal involves adjusting the pressure increase output time of the pulse pressure increase from a master cylinder to the wheel cylinder based on the pressure differential between the master cylinder hydraulic pressure and the wheel cylinder hydraulic pressure of each wheel cylinder. The wheel cylinder hydraulic pressure of each wheel cylinder is calculated based on an estimated vehicle deceleration obtained from an estimated vehicle speed.