| 摘要 |
<p>PCT No. PCT/EP90/00815 Sec. 371 Date Mar. 13, 1991 Sec. 102(e) Date Mar. 13, 1991 PCT Filed May 21, 1990 PCT Pub. No. WO91/01236 PCT Pub. Date Feb. 7, 1991.An actuating unit for hydraulic automotive vehicle brake systems, including a vacuum brake power booster, a master brake cylinder, and an operating element, configured to achieve a reduction of overall axial length and a simultaneous reduction of the weight and a relief of the booster housing from forces of reaction. The brake pedal (3) operating arm is interposed between the vacuum brake power booster (1) and the master brake cylinder engaging an axially extending member interconnecting a control valve piston and a master cylinder piston (2). The booster housing (10) and fluid reservoir (4) are mounted within the engine compartment while the master cylinder housing has a flange portion fixed to the splashwall and a main portion which projects out of the engine compartment through the splash wall, and into the passenger compartment. The hydraulic reaction forces are absorbed directly from the master cylinder housing into the splashwall rather than through the booster housing. Actuation of the fluid reservoir valves (40, 41) associated with the pressure chambers (14, 15) of the master brake cylinder (2) takes place simultaneously with the actuation of the control valve (13) located at one end of the booster housing of the vacuum brake power booster (1). Air required for venting of the power chamber (6) of the vacuum brake power booster (1) is drawn into the control valve from an intake formed on the control valve and projecting into the engine compartment of the vehicle.</p> |
