Pressure valve

Details Pressure valve Pressure valve

1993-01-29

1994-03-15

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

1375395, 417296, F16K 1718

Patent

active

052938972

ABSTRACT:
A pressure valve to be secured into a supply line between a pump work chamber of a fuel injection pump and a injection location of an internal combustion engine to be supplied with fuel. A pressure valve closing element provided with a sealing face is pressed by a compression spring onto a valve body provided with a valve seat. To reduce pressure waves in the supply line caused by a sudden closing of the pressure valve, a check valve that opens in the direction of the pump work chamber, and that comprises a valve seat, a valve closing element, a spring plate and a restoring spring is disposed in a through conduit of the pressure valve closing element, which is preceded by a throttle restriction. Throttling of the fuel flowing downstream of the check valve is avoided by disposing a through conduit in the spring plate. A filler piece inserted into the through conduit and defining the opening stroke of the check valve, also has a longitudinal bore that opens into a transverse bore for an unthrottled fuel flow.

REFERENCES:
patent: 4692102 (1987-09-01), Hafele
patent: 4926902 (1990-05-01), Nakamura
patent: 4930553 (1990-06-01), Grillo

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