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AssigneePoclain Hydraulics Industrie
InventorsJean-Marie Rouillard, Philippe Lucienne
Estimating the term…
A braking system comprises one or more brake cylinders (100, 200, 300, 400) each associated with one or more wheels, a fluid supply (10), and a brake control (14) for commanding the feeding of fluid to the cylinder or cylinders via one or more brake valves and one or more brake pipes (44, 46). The system also comprises a function selector (50) adapted to adopt an antislip mode position (50A) or antilock mode positions in which it connects a branch pipe (52) to a fluid feed pipe (54) or to a return line (56) and a control valve (110, 210, 310, 410) for the or each brake cylinder adapted to adopt a normal braking position (100A, 210A, 310A, 410A) to connect the cylinder to the brake pipe (44, 46) and one or more special mode positions (110B, 210B, 310B, 410B) to connect the cylinder to the branch pipe (52) that the function selector connects to the return line or to the feed. The system further comprises means (120, 220, 320, 420, UC) for detecting wheelspin or a wheel tending to lock and for commanding the function selector (50) and the control valve associated with the brake cylinder associated with that wheel accordingly.
An antislip regulation and an antilock braking system for a vehicle equipped with a braking system comprising at least one brake cylinder associated with one or more wheels, a source of fluid under pressure, a brake control adapted to be operated to effect braking by feeding said cylinders with fluid under pressure via at least one brake valve and at least one brake pipe,
An antislip and an antilock control valve for one or more wheels of a vehicle, having a first channel connected to a brake cylinder, a second channel connected to a braking pressure source, a third channel connected to a pressure relief pipe, and a fourth channel connected to an antislip pressure source, said control valve being a progressive valve that includes a movable member movable between a normal braking position in which the first and second channels are connected together and isolated from the third and fourth channels, an antilock mode position in which the first and third channels are connected together and isolated from the second and fourth channels, and an antislip mode position in which the first and fourth channels are connected together and isolated from the second and third channels, wherein said valve includes means for varying a communication area between the first and fourth channels in the antislip mode position as a function of the pressure in the first channel and for varying the communication area between the first and third channels in the antilock mode position as a function of the pressure In the first channel.
Dependencies are inferred from the claim text.