Motors: expansible chamber type – With signal – indicator or inspection means
Patent
1991-07-30
1993-07-06
Look, Edward K.
Motors: expansible chamber type
With signal, indicator or inspection means
91361, 913691, F01B 2526, F15B 910
Patent
active
052244105
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a brake power booster for brake systems with anti-lock and/or traction slip control. This brake power booster comprises a servo-cylinder and a servo-piston within the servo-cylinder, the position of the servo-piston in the servo-cylinder being detected by a sensing device. In particular, the invention relates to a vacuum brake power booster.
BACKGROUND OF THE INVENTION
The present invention can be applied to state-of-the-art vacuum brake power boosters as described, for example, in the Brake Handbook, 8th edition, Alfred Teves GmbH, herein incorporated by reference for its teachings in the field of brake systems. Specific reference to vacuum brake power boosters is found on pages 94 et seq. of this handbook.
The present invention also can be applied to brake systems which are equipped with anti-block and/or traction slip control. A pneumatic brake power booster for a brake system which has an anti-lock and/or traction slip control is described, for example, in German patent application No. P 3815768.3.
The aforesaid patent application discloses a pneumatic brake power booster, and in particular a vacuum brake power booster for a brake pressure control device. The patent specifically discloses an anti-block control device (ABS device) or a traction slip control device (TSC device) for automotive vehicles with a master cylinder, wheel cylinders, at least one pump for the positioning of at least one piston of the master cylinder, a pressure modulator which modulates the pressure in the wheel cylinders during the control modus, and an electronic controller which processes wheel sensor signals to actuating signals for the inlet valves and for the shut-off valves of the pressure modulator. The booster is comprised of a housing, a piston element, a diaphragm retainer in particular, and a diaphragm, preferably of a rolling diaphragm which sealingly connects the piston element to the housing and which permits movements of the piston element relative to the housing, the piston element being in active connection with the brake pedal.
It is proposed in the aforesaid German patent application that the housing, the piston element, in particular the diaphragm retainer, and the diaphragm preferably the rolling diaphragm, are configured as part of a travel switch for the control of the pump, in particular through the electronic controller.
It is shown by FIG. 4 of the German patent application that a travel sensor housing for a travel sensor 64 projects beyond the outer contour of the vacuum brake power booster.
SUMMARY OF THE INVENTION
It is an object of the present invention to eliminate the projection of the travel sensor from the contour of the booster.
Because of its outer contour, the inventive booster is virtually universally mountable.
The vehicle manufacturers repeatedly change their specifications regarding the mounting spaces for brake power boosters. These modifications involve the location, the size, and the configuration of the mounting space.
It is another object of the present invention to be able to adapt to changes of this kind without any major expenditure.
The inventive booster therefore offers maximum independence with regard to the space offered by the automotive vehicle manufacturers.
In addition, the booster housings can be standardized to a few standard types. Thus, a reduction in the mounting space requirements of the booster are realized.
Furthermore, the susceptibility of the vacuum brake power booster to strain during transport and assembly, due in particular to the projection of the travel sensor, is avoided.
It is a further object of the present invention to simplify the exchangeability and assembly of the vacuum brake power booster.
Moreover, the structural prerequisites are fulfilled by uniting the prior-art vacuum nozzle and the prior-art non-return valve with the sensor housing so as to form a compact assembly unit.
According to the invention, these and other objects are achieved by configuring one portion of the wall of the s
REFERENCES:
patent: 3155188 (1964-11-01), Stoltman
patent: 3970985 (1976-07-01), Sage
patent: 4365538 (1982-12-01), Andoh
patent: 4771604 (1988-09-01), Nakano
patent: 4773222 (1988-09-01), Tanaka et al.
patent: 5123330 (1992-06-01), Roether et al.
patent: 5141295 (1992-08-01), Burgdorf et al.
Graichen Kai-Michael
Kornas Christof
Lewis J. Gordon
Look Edward K.
Ryznic John
Seitter Robert P.
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