Power plants – Pressure fluid source and motor – Pulsator
Patent
1996-08-02
1997-11-11
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Pulsator
92161, B60T 1300, F01B 100
Patent
active
056851502
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention pertains to a pressure control device for slip-controlled hydraulic brake systems and more specifically to mounting systems thereof.
BACKGROUND OF THE INVENTION
EP 0,356,817 B1 discloses a pressure control device for slip-controlled hydraulic brake systems. In a first embodiment, the pump unit that is combined with the pressure modulator is fastened on both tie rods of the pneumatic power booster. For this purpose, one end face of the pressure modulator is provided with a holding lug for fastening the first tie rod in the holding lug via damping elements. The second tie rod also engages in a holding lug of a holding part that consists of flat steel and is fastened to the cover of the electric motor. In one additional embodiment, the holding part of flat steel which is fastened to the end surface of the housing of the electric motor is, in contrast to the first embodiment, not fastened on the tie rods, but rather a holding screw of the master cylinder. In a third embodiment, a holding device formed of two holding bolts and one flange is provided on the hydraulic unit as a multipoint suspension, with said holding device being fastened on both tie rods between the master cylinder and the pneumatic power booster. The hydraulic unit is screwed to the holding device inside the damping elements arranged in the suspension by means of a strap that encompasses the housing of the electric motor as well as a holding lug that is integrally formed on the end surface region of the pressure modulator.
All previously described suspensions of the hydraulic unit on the power booster or the master cylinder are associated with increased manufacturing expenditures, namely because the hydraulic unit needs to be provided with correspondingly complicated holding lugs and the separate retention on the end surface of the electric motor requires a particularly rigid motor housing. In addition, it is possible that distortions occur during the mounting of the hydraulic unit on the power booster or the master cylinder. Consequently, the structural volume and the weight are significantly increased.
SUMMARY OF THE INVENTION
The invention is based on the objective of developing a pressure control device for slip-controlled hydraulic brake systems that allows a simple and inexpensive fastening of the hydraulic unit on the brake pressure transducer as well as a standardization of the suspension points for all housing variations of the hydraulic unit and ensures a simple, optimal vibration damping between the hydraulic unit and the holding device, wherein the housing of the electric motor is alleviated from all holding forces.
According to the invention, this objective is attained with the characteristics disclosed in the characterizing portion of claim 1, according to which a multipoint suspension is arranged on the hydraulic unit, with said multipoint suspension being exclusively connected to a holding device via elastically deformable damping elements in such a way that the housing of the electric motor is alleviated from the holding forces of the multipoint suspension.
These measures ensure that the number of individual components required is kept to a minimum, and that a standardization with respect to the uniformity of the holding points is attained. The housing of the electric motor can be correspondingly short and have thin walls. In addition, a standardization of the brake line connections is provided for identical holding devices.
Additional characteristics and advantages of the invention are described below with reference to the constructive embodiments shown in the figures.
BRIEF DESCRIPTION OF THE FIGURES
FIG. 1 is a top view one basic embodiment of the arrangement of a multipoint suspension on a hydraulic unit.
FIG. 2 is a top perspective representation of a pressure control device with a concrete embodiment of the arrangement for suspending the hydraulic unit on the brake pressure transducer.
FIG. 3 is a top view of a holding device for fastening the hydraulic unit on the brake pre
REFERENCES:
patent: 3175235 (1965-03-01), Randol
patent: 3606756 (1971-09-01), Hellmann
patent: 4826121 (1989-05-01), Rossigno et al.
patent: 5022717 (1991-06-01), Heibel et al.
patent: 5331813 (1994-07-01), Heibel
PCT Application Serial No. 89/01434 Dated Feb. 23, 1989.
PCT Application Serial No. 93/02901 Dated Feb. 18, 1993.
Czarnetzki Edwin
Hinz Axel
ITT Automotive Europe GmbH
Lewis J. Gordon
Nguyen Hoang
Twomey Thomas N.
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