Non-return valve for a hydraulic vehicle power brake system, and hydraulic vehicle power brake system
AssigneeRobert Bosch GmbH
InventorsAndreas Weh, Martin Hagspiel
Life of this patent
Estimating the term…
Abstract
A non-return valve having a valve opening spring is positioned between an unpressurized brake fluid reservoir and a brake master cylinder of a hydraulic vehicle power brake system having an externally-powered brake pressure generator. The non-return valve allows for a flow-through in the direction of the brake master cylinder and blocking against a return flow from the brake master cylinder into the brake fluid reservoir starting at a counterpressure in the brake master cylinder specified by the valve opening spring.
Claims8
1-6. (canceled)
A non-return valve for a hydraulic vehicle power brake system configured to be positioned between a brake fluid reservoir and a brake master cylinder and allow for a flow in a flow-through direction, the non-return valve having a valve opening spring, which keeps the non-return valve open until a specified counterpressure has been reached in a closing direction counter to the flow-through direction, so that the non-return valve closes only once the specified counterpressure in the closing direction has been exceeded.
A hydraulic vehicle power brake system, comprising:
- a brake master cylinder operable by muscular energy;
- a power brake pressure generator;
- and
- a brake fluid reservoir, wherein the brake master cylinder is connected to the brake fluid reservoir by a non-return valve, which is configured to allow for a flow in a flow-through direction from the brake fluid reservoir to the brake master cylinder and which has a valve opening spring which keeps the non-return valve open until a specified counterpressure is reached in a closing direction counter to the flow-through direction, so that the non-return valve closes only once the specified counterpressure in the closing direction has been exceeded.
A hydraulic externally-powered vehicle brake system, comprising:
- a brake master cylinder operable by muscular energy;
- a power brake pressure generator;
- and
- a brake fluid reservoir, wherein the brake master cylinder is connected to the brake fluid reservoir by a switchable test valve configured to open at a specified overpressure in the brake master cylinder relative to the brake fluid reservoir, and a non-return valve hydraulically parallel to the test valve, which is configured to allow for a flow in a flow-through direction from the brake fluid reservoir to the brake master cylinder and blocks against a flow-through in an opposite closing direction.
Dependencies are inferred from the claim text.