Traction slip controller for road vehicle with antilock braking - has additional master cylinder acted upon by vacuum in larger cylinder with piston position monitor switch

摘要

The vehicle has a hydraulic two-wheel braking circuit (10) with a drive motor (11), ABS system (12) and a traction slip controller (13). The braking circuit for one or more driven wheels includes an additional master cylinder (63) whose piston is positioned by a pneumatic or hydraulic cylinder (64) connected by a valve to the auxiliary power source of the braking force amplifier. The piston of this cylinder (64) has a projecting rod with a radial enlargement which at about one-fifth to one-third of max. travel operates a rocker switch (99). An electronic control unit (50) receives signals from electronic wheel-speed sensors (51-54) and a braking light switch (49) to produce control signals for brake pressure control valves (31-34) and a drive motor (47) of return feed pumps (28, 29). ADVANTAGE - Gives faster and more sensitive application in combination with any type of antilock braking system having individual wheel brake pressure control valves.