Slip-controlled hydraulic vehicle brake system
AssigneeRobert Bosch GmbH
InventorHeinz Siegel
Life of this patent
Estimating the term…
Abstract
A slip-controlled hydraulic vehicle brake system having brake lines that extend between a dual-circuit master cylinder and a respective wheel brake cylinder. A shutoff valve in the respective brake line. A bypass line that bypasses the respective shutoff valve. A pump in the respective bypass line for pumping pressure fluid, drawn from the associated wheel brake cylinder to the master cylinder. The pump (30) is also embodied to feed pressure fluid from the master cylinder to the wheel brake cylinder. The pump is a recirculating positive-displacement vane cell pump. The pump in the bypass lines has a common drive motor whose rotational direction can be reversed. The vehicle brake system is embodied for anti-lock and traction control operation at no additional expense for equipment.
Claims7
A slip-controlled vehicle brake system (10), comprising brake lines (17, 18) that extend between a dual-circuit master cylinder (13) and a respective wheel brake cylinder (19, 20) in each of the brake lines (17, 18),
- a shutoff valve (21) in each respective brake line (17, 18) of the brake system,
- a bypass line (24, 25) that bypasses each respective shutoff valve (21) in said brake lines, and
- a pump (30) in each respective bypass line (24, 25) for pumping pressure fluid, drawn from the associated wheel brake cylinders (19, 20), to the master cylinder (13),
- each of the pumps (30) are also embodied for pumping pressure fluid from the master cylinder (13) to the wheel brake cylinder (19, 20);
- each of the pumps (30) are a recirculating positive-displacement vane cell pump;
- and
- each of the pumps (30) in the bypass lines (24, 25) have a common drive motor (38) whose rotational direction is reversible.
Dependencies are inferred from the claim text.