B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/70
B60T 1/00 (2006.01) B60T 8/26 (2006.01) B60T 8/34 (2006.01) B60T 8/40 (2006.01) B60T 8/44 (2006.01) B60T 13/14 (2006.01) B60T 13/16 (2006.01)
Patent
CA 1238677
S u m m a r y: Brake System for Automotive Vehicles A brake system for automotive vehicles, wherein the brake pedal pressure (F) can be transmitted assisted by auxiliary force to the wheel brake cylinders through pressure lines (brake circuits 1, 2, 31, 32) containing modulators, the said brake system comprising transducers (19 through 22, S1 through S4) for the determination of the wheel rotational behaviour as well as of the vehicle velocity and comprising electronic circuitries (28, 54) for the processing and the logic combining of the measured values as well as for the generation of control signals for the modulators (11 through 18, 39 through 42). Preferably, electromagnetically actua- table valves (11 through 18, 39 through 42) are used as mod- ulators. By virtue of the braking pressure modulators, both a control of the brake force distribution in dependence upon the brake slip of the front wheels and, in addition, a brake slip control preventing locking of the vehicle wheels will be performed. In a particularly straightforward embodiment of this in- vention, the two brake circuits (31, 32) act each directly onto a front wheel and via a braking pressure modulator (39, 40) onto a rear wheel. The distribution of the braking pres- sure onto the front wheels and onto the rear wheels is gov- erned with the aid of these braking pressure modulators (39, 40). With a view to decreasing the braking pressure at - 2 - the rear axle, an electromagnetically actuatable valve (41) is arranged, which is via check valves (43, 44) in communication with the two brake circuits (31, 32) and which, after being energized or changed over, respectively causes discharge of pressure medium into a supply and compensating reservoir (37). With a view to decreasing the braking pressure at the front wheels, the auxiliary energy resp. auxiliary force the power brake booster (33) is supplied with will be reduced, for what purpose e.g. an electromagnetically actuated valve (42) may be used which temporarily "provides for a short-circuit" between the pressure side of the pump (36) delivering the aux- iliary energy and the compensating reservoir (37). In this arrangement, an open-centre booster (33) serves as a power brake booster. Figure 2
450939
Alfred Teves Gmbh
Smart & Biggar
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