A three-wheeled vehicle having a pair of front wheels and a single rear wheel is provided with a roll-related reactive system. The roll-related reactive system provides braking of at least one of the front wheels independent of braking initiated by an operator of the vehicle.

A motor vehicle hydraulic brake system which includes a front brake circuit and a rear brake circuit. The rear brake circuit includes a blend back proportioning valve which controls the pressure in the rear brake circuit. The blend back proportioning valve includes a pressure reducing sleeve and a pressure intensifying piston. The pressure reducing sleeve in conjunction with the pressure intensifying piston maintains increases in rear brake pressure proportional to but less than increases in mas...

An hydraulic braking pressure control unit for a vehicle includes a first valve member installed at an intermediate point in a flow passage providing communication between the rear brake system of a tandem master cylinder and rear wheel cylinders, the valve member is adapted to open and close the passage, and a proportioning valve is normally urged in one direction to keep the valve member away from its seat to establish communication between the tandem master cylinder and the rear wheel cylinde...

Dual-circuit pressure regulators for brake systems are known in which the two valve pistons are acted upon by means of two separate control springs. In this known arrangement, it is difficult to make the forces of the two control springs equal and the forces of the two control springs are not adjustable. To overcome these disadvantages, the dual-circuit pressure regulator of the present invention employs a single control spring common to the two valve pistons and one valve-closing member interac...

A dual type hydraulic circuit for a vehicle brake which comprises a control valve for controlling the hydraulic pressure in the rear wheel cylinders such that the distribution of braking pressure to the front and rear wheels may be appropriate in either cases, when both circuits are in normal function or when one circuit is faulty. The control valve includes a proportioning valve with a valve piston for opening and closing a fluid passage to the rear wheel cylinder, and a differential piston for...

In an hydraulic braking system for a vehicle the rear wheel brakes are adapted to be applied by a fluid pressure generated by, and dependent upon, the pressure applied to at least one of the front wheel brakes. Control of the rear wheel brakes may be achieved by a fluid power unit under the control of at least one solenoid-operative valve which, in turn, is responsive to signals from sensing means responsive to the behaviour of the rear wheels.

Antilock control system wherein pressure at the front and rear axles is controlled in cycles which each include a pressure reduction followed by a build-up of the brake pressure in pulses having holding phases therebetween. When a build-up of brake pressure at the front axle exceeds a predetermined time, the rate of build-up at the rear axle is reduced. The system prevents too much pressure build-up at the rear axle during the dynamic load transfer which occurs when braking a vehicle having a hi...

A method and an apparatus are described for controlling the braking force distribution in a vehicle between front and rear axles, such that at least while the vehicle is traveling in a curve, the braking force at the rear wheels is established individually in such a way that the difference between the velocity of that rear wheel and a front wheel velocity assumes defined values.

A method of controlling a brake force in a brake system including a front wheel system and a rear wheel system, includes the steps of: operating a brake in the front wheel system by using a hydraulic pressure corresponding to an amount of brake pedal operation; and controlling a wheel speed of the rear wheel system via a feedback mechanism to match a wheel speed of the front wheel system.

A control device for motor vehicle hydraulic braking circuits of the type having separate circuits for the front wheel brakes and the rear wheel brakes and a pressure reducer for reducing the braking pressure applied to the rear wheel brakes in relation to the pressure applied to the front wheel brakes. The control device operates to short circuit or bypass the pressure reducer in the event of a loss of braking pressure in the front wheel braking circuit so that the maximum braking effect can be...