IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0809292
(2004-03-25)
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발명자
/ 주소 |
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출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
9 |
초록
▼
In a hydraulic braking system operated by an external force, for vehicles, in particular motor vehicles, having a primary pressure source which is operated by external energy and provide brake pressure to the wheel brakes during normal operation, and which also has a foot-actuated auxiliary pressure
In a hydraulic braking system operated by an external force, for vehicles, in particular motor vehicles, having a primary pressure source which is operated by external energy and provide brake pressure to the wheel brakes during normal operation, and which also has a foot-actuated auxiliary pressure source which supplies the wheel brakes with brake pressure during emergency operation, to increase the degree of safety, a special hydraulic circuit is provided wherein, during emergency operation, only comparatively few valves between the wheel brakes and a hydraulic reservoir have to be closed so as to be free of leakage, while operational safety is increased by the valves being connected in series.
대표청구항
▼
What is claimed is: 1. A hydraulic braking system operated by an external force, for vehicles, in particular motor vehicles, having at least two axles, comprising a low-pressure-side hydraulic reservoir (3), at least one primary pressure source (2', 2") which is operated by external energy and whic
What is claimed is: 1. A hydraulic braking system operated by an external force, for vehicles, in particular motor vehicles, having at least two axles, comprising a low-pressure-side hydraulic reservoir (3), at least one primary pressure source (2', 2") which is operated by external energy and which is connected to the hydraulic reservoir (3) for the supply of a hydraulic medium, an auxiliary pressure source (10) which is independent of said primary pressure source (2', 2") and can be actuated by an operator and which is connected to the hydraulic reservoir (3) for the supply of hydraulic medium and the delivery side of which communicates with the hydraulic reservoir (3) in the non-actuated state off the auxiliary pressure source (10), displacer assemblies (5) each being assigned to a wheel brake for independent actuation of the latter, normally closed controllable inlet valves (6) which are assigned each separately to the displacer assembly (5) for the controllable connection of the latter to the primary pressure source or to one of the primary pressure sources (2', 2"), normally open connecting valves (7) which are assigned each to the displacer assembly (5) and in parallel to the respective inlet valve (6) and which are interconnected with one another, axle by axle, on their side facing away from the assigned displacer assembly (5), a normally closed outlet valve (8) which is assigned each to an axle and arranged in each case between the hydraulic reservoir (3) and the interconnected sides of the connecting valves (7 ) of the respective axle, and normally open separating valves (9) which are assigned each to an axle and are arranged in each case parallel to the outlet valve (8) of the respective axle between the auxiliary pressure source (10) and the interconnected sides of the connecting valves (7) of this axle, other axles including further outlet valves ( 8) between the hydraulic reservoir (3) and the interconnected sides of the connecting valve (7) of these axles and further separating valves (9) being arranged between the delivery side of the auxiliary pressure source (10) and the interconnected sides of the connecting valves (7) of these axles, the outlet valves ( 8) forming a series connection, in which the connecting valves ( 7) of a second axle are connected in each case between the outlet valves of the first and of the second axle. 2. The braking system operated by an external force as claimed in claim 1, wherein the first axle is a front axle and the second axle a rear axle. 3. The braking system operated by an external force as claimed in claim 1, wherein the connecting valves (7) and the outlet valves (8) are control valves. 4. The braking system operated by an external force as claimed in claim 1, wherein all valves (6 to 9) are seat-controlled valves. 5. The braking system operated by an external force as claimed in claim 1, wherein at least part of the hydraulic medium displaced from at least one of the displacer assemblies (5) as a result of lifting play, with the wheel brakes not actuated, is conducted to the auxiliary pressure source (10) via the separating valve ( 9) assigned to the respective axle. 6. The braking system operated by an external force as claimed in claim 1, wherein a line path, leading to the auxiliary pressure source (10), of each displacer assembly (5) is designed as a venting path whereby air, gas and vapor bubbles travel to the auxiliary pressure source by virtue of buoyancy. 7. The braking system operated by an external force as claimed in claim 1, wherein connections between the auxiliary pressure source (10) and reservoir (3) are designed as venting paths, in such a way that air, gas and vapor bubbles travel to the reservoir by virtue of buoyancy. 8. The braking system operated by an external force as claimed in one claim 1, wherein, at the end of a braking maneuver, the outlet valves (8) are closed and the separating valves (9) opened, and, as a result of a lifting play of the displacer assemblies (5) due to the connecting valves (7) being open, with the brake not actuated, a hydraulic stream assisting a venting of the system to a system part (10), which is open to the atmosphere, can be generated.
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