초록 ▼

A hydraulic brake system having an anti-lock system (ABS) and traction control (ASR) for motor vehicles including a hydraulic unit with at least one control valve and a return pump having at least one pump element that is embodied as self-aspirating pump element and that is operative in a brake circ

A hydraulic brake system having an anti-lock system (ABS) and traction control (ASR) for motor vehicles including a hydraulic unit with at least one control valve and a return pump having at least one pump element that is embodied as self-aspirating pump element and that is operative in a brake circuit, which contains at least one drive wheel. A valve assembly serves to furnish brake pressure in ASR and each valve assembly comprises a respective charging valve embodied as a 2/2-way magnet valve and an electromagnetic reversing valve. In order that a low hydraulic power requirement can be attained in traction control, only the valve assembly is triggered, and is triggered such that for pressure buildup the electromagnetic reversing valve blocks fluid flow and the charging valve is opened, while for pressure holding both valves block fluid flow, and for pressure reduction the charging valve blocks fluid flow and the electromagnetic reversing valve is opened.

대표청구항 ▼

A hydraulic brake system with an anti-lock system (ABS) and traction control (ASR) for a motor vehicle, including at least one brake circuit (I, II) having a master brake cylinder with at least one brake circuit outlet for controlling a brake pressure by brake pedal actuation, having a brake fluid t

A hydraulic brake system with an anti-lock system (ABS) and traction control (ASR) for a motor vehicle, including at least one brake circuit (I, II) having a master brake cylinder with at least one brake circuit outlet for controlling a brake pressure by brake pedal actuation, having a brake fluid tank that communicates with the master brake cylinder of at least one drive wheel, a hydraulic unit connected to the at least one brake circuit outlet, said hydraulic unit has at least one outlet channel for connection of a wheel brake cylinder associated with said at least one drive wheel of the motor vehicle, at least one control valve connected on a first side to the at least one brake circuit outlet via a first connecting line and on a second side to the at least one outlet channel, and a return pump having at least one pump element embodied as self-aspirating, said at least one pump element is connected on an inlet side to the at least one outlet channel via the at least one control valve and on an outlet side said at least one pump element is connected to the first connecting line, at least one valve assembly for furnishing a brake supply pressure in traction control, said at least one valve assembly has a charging valve, which at least in traction control connects the pump element to said brake fluid tank via a second line connection and blocks said second line connection to the brake fluid tank upon brake pedal actuation, and an electromagnetic reversing valve disposed in the first connecting line, said electromagnetic reversing valve blocks the first connecting line in traction control, said charging valve (47, 47′) is embodied as a 2/2-way magnet valve, and that upon traction control, said at least one valve assembly (46, 46′) and said charging valve are triggered in such a manner that for pressure buildup in the wheel brake cylinder (10) of the at least one drive wheel (11, 12), the electromagnetic reversing valve (48, 48′) assumes a blocking position and the charging valve (47, 47′) assumes an open position, for pressure holding, each the charging valve (47, 47′), and the electromagnetic reversing valve (48, 48′) assume a blocking position, and for brake pressure reduction, the charging valve (47, 47′) assumes a blocking position and the electromagnetic reversing valve (48, 48′) assumes an open position.