| 摘要 |
A hydraulic brake booster for a motor vehicle includes a housing defining a piston chamber and a piston in the chamber. The piston divides the piston chamber into low-pressure and high-pressure chambers. A piston bore extends along an axis within the piston and has an inlet connected to a brake accumulator. A check valve is in the inlet, the check valve configured to check flow from the high-pressure fluid source through the inlet, and a spool valve is in the piston bore. The spool valve seals the piston bore with a single sealing surface, simplifying construction and reducing leakage. |
