| 摘要 |
943,989. Hydraulic brakes; valves. BENDIX CORPORATION. March 9, 1962 [March 27, 1961], No. 9235/62. Headings F2F and F2V. A deceleration sensing valve for use in a vehicle hydraulic master cylinder braking system comprises a valve body 20 with a chamber 28 inclined vertically in a forward direction and extending in the line of motion of the vehicle, a partition wall 32 across the chamber having an opening therethrough controlled by a spring loaded poppet valve 46 which is normally kept open by the weight of a ball 50, an inlet port 42 on the front side of the partition member being connected to one of the sets of front or rear wheel brake cylinders. In operation, the master cylinder forces fluid through the inlet port 40, through the open valve 46 and outlet port 42 to the rear wheel brake cylinders C while at the same time forcing fluid through the outlet port 44 to the front wheel brake cylinders B. As the pressure to the front and rear brake cylinders increases, the deceleration of the vehicle also increases until the ball 50 is caused to roll up the sidewalls 24 of the chamber 28 to allow the poppet valve 46 to close. When this happens, no further increase in pressure is produced in the rear wheel brake cylinders C and any further increase in pressure from the master cylinder will flow directly to the front wheel brake cylinders B through the port 44. To allow for drum expansion due to heat during a severe stop, an expansible chamber D is provided controlled by a spring-loaded piston 62. Reference has been directed by the Comptroller to Specification 900,999. |
