Abstract: Braking systems including integrated control circuitry and sensors for measuring the pressure and temperature of the brake system and for determining various status information and performance parameters of the braking system and other related systems, such as tire and suspension systems.

Abstract: In an ABS control ECU, a power supply output circuit and a power supply monitoring unit are formed on the same chip. A power supply terminal for the power supply output circuit is provided separately from a power supply terminal for the power supply monitoring unit. A ground terminal for the power supply output circuit is provided separately from a ground terminal for the power supply monitoring unit.

Abstract: Implementation of a travel dynamics control system in a vehicle is facilitated by integration of same with other operational components of an electrically controlled vehicle braking system. In an embodiment of the invention, travel dynamics electronics are integrated with the braking system electronics. In another embodiment, a yawing speed sensor and a transverse acceleration sensor are integrated with the travel dynamics electronics.

Abstract: An antiskid brake system for an automotive vehicle is provided which includes a parameter determining circuit and a braking condition determining circuit. The parameter determining circuit determines a parameter reflecting on brake torque applied to a wheel of the vehicle. The braking condition determining circuit compares the phase of a change in speed of the wheel with the phase of a change in the parameter to determine a phase delay of the change in speed of the wheel and determines the braking condition based on the phase delay, thereby allowing a wheel skid used in the antiskid brake control precisely without employing parameters such as vehicle speed and wheel speed as employed in conventional antiskid brake systems.

Abstract: The method of controlling a motor vehicle braking system to prevent wheel slip or skidding includes generating wheel speed signals indicative of wheel speeds of each of at least two wheels; determining the wheel speeds from each wheel speed signal; determining a vehicle reference speed from one of the wheel speeds; determining whether or not the vehicle reference speed is within a predetermined speed range of 47 to 63 Hz, during which interference signals from a vehicle power source at about a mains frequency are generated that produce false wheel speed signals and controlling the motor vehicle braking system according to a special ABS control method when the vehicle reference speed is within the predetermined speed range. In the special ABS control method the interference signals are accounted for so that improper activation of or influence on the braking system due to the interference signals is prevented.

Abstract: The present invention relates to a process and a control system for generating defined actuating forces in a brake which is electrically operable by way of an actuator, wherein there is a first static relation between the brake's actuating travel and the actuating force. The process and the control system permit determining the actuating forces which develop during operation without additional sensors. To achieve this object, according to the present invention, a second relation which corresponds to the operation of the brake is determined from the first relation and an information which represents the variations of the first relation.

Abstract: When a vacuum booster fails, an pressure amplifying mechanism increases a wheel brake pressure. After that, even when it is detected that the vehicle is brought into a stopped state, the state in which an increased brake fluid pressure is applied to wheel cylinders is held. If a condition for terminating control to maintain a stationary state of the vehicle is satisfied, that is, if a predetermined time period has elapsed since when the vehicle stops, the operation of the pressure amplifying mechanism is stopped to reduce the wheel cylinder pressure.

Abstract: A diagnosis apparatus of solenoid drive circuits for an anti-lock braking system. In the diagnosis apparatus, each comparator outputs H-level signal to each counter in reply to the turning-on of a solenoid of a solenoid valve to reset and start the counter. When the counter counts a predetermined time TI, the counter outputs a carry signal to an OR gate and a diagnosis decision circuit where AND operation of two pairs of the outputs of the counters by each brake hydraulic unit is executed and OR operation of the outputs of the AND elements is execute. A select circuit receives a check signal indicative of a diagnosis executing mode and outputs the diagnosis result to a microcomputer for ABS control. Therefore, the diagnosis is collectively executed to all brake hydraulic systems without degrading the drivability of the vehicle.

Abstract: A control apparatus for an anti-skid brake system of a motor vehicle can ensure operation of electromagnetic valves for actuating wheel brakes even when a battery voltage is low while ensuring a sufficient braking force for a motor vehicle even when an onboard battery of the motor vehicle is connected with reverse polarity.

Abstract: A braking force control system for a motor vehicle, in which a hydraulic pressure control device controls a hydraulic pressure generated by the master cylinder or the pump, in such a way that a target braking torque (Nr in FIG. 1) is calculated from a target slip factor (Sr) and an actual slip factor (S), the target braking torque (Nr) is converted into a target braking hydraulic pressure (Pr), and that an estimative braking hydraulic pressure (P) currently under action is calculated by the use of a hydraulic pressure model, while the controlled variable of the hydraulic pressure control device is calculated from the estimative braking hydraulic pressure (P) and the target braking hydraulic pressure (Pr) by the use of a reverse hydraulic pressure model. Thus, the hydraulic pressure can be controlled in conformity with the actual motion state of the motor vehicle.

Abstract: A drive slip control system for the driven wheels of a motor vehicle is disclosed in which the differential is blocked by the action of the brakes. With the aid of the difference in the rate of rotation of the driven wheels and with the aid of the engine rpm a PID controller and a damping action generate signals that correspond to braking moments which are converted into valve control times and generate a brake pressure at a specific brake.