초록 ▼

This invention is a braking force modulator for hydraulic vehicle brakes which is intended to be inserted into the braking fluid conduit between the main cylinder or the like and one or more of the wheel braking cylinders and controlled by a sensor system for performing braking force modulation. The

This invention is a braking force modulator for hydraulic vehicle brakes which is intended to be inserted into the braking fluid conduit between the main cylinder or the like and one or more of the wheel braking cylinders and controlled by a sensor system for performing braking force modulation. The braking force modulator comprises a piston pump unit (12) with normally open inlet and outlet valves (37, 38) adapted to be closed under the action of a solenoid device (47, 48, 49, 52) whereby the unit is conditioned to act as a piston pump. The inlet and outlet valves (37, 38) are two mutually independent units adapted to be operated individually by one solenoid device each.

대표청구항 ▼

In a brake modulator for use in fluid pressure brake systems and adapted to be inserted into a brake fluid conduit between a brake fluid pressure generator and a wheel braking cylinder and to be controlled by a sensor system, the modulator having first and second conduit coupling means for interposi

In a brake modulator for use in fluid pressure brake systems and adapted to be inserted into a brake fluid conduit between a brake fluid pressure generator and a wheel braking cylinder and to be controlled by a sensor system, the modulator having first and second conduit coupling means for interposition of the modulator in the conduit, first and second valve means in series flow relation with each other and with the conduit coupling means for controlling fluid flow and defining a controlled conduit portion, valve actuator means operatively coupled to the valve means for normally conditioning the valve means for free passage of fluid through the modulator and controllably operable for conditioning the valve means for blocking passage of fluid through the modulator, and means operatively communicating with the controlled conduit portion for cyclically expanding and contracting the volume thereof and thereby for cooperating with the valve means in pumping fluid through the modulator, those improvements in the valve means and valve actuator means which facilitate enhanced operation of the modulator and which comprise each of said valve means having secondary valve means for enlarged volume flow and primary valve means for restricted volume flow and mounted adjacent to and seated in the corresponding one of said secondary valve means, and said valve actuator means having first and second electromagnetic means for operating corresponding ones of said first and second valve means, said electromagnetic means being capable of functioning independently one of the other and each being mounted adjacent to the corresponding one of said valve means and to the same side of said secondary valve means as the associated primary valve means.