HIGH-PRESSURE FUEL INJECTION PUMP Russian patent published in 1997 - IPC

FIELD: manufacture of engines; fuel injection equipment of internal combustion engines. SUBSTANCE: valve is fitted in bypass passage of high-pressure fuel injection. Delivery chamber of first plunger pair is located for communication with passage of pipe union through passages in spool valve; cam drive consists of two camshafts kinematically linked with respective plungers and shifted by phase relative to each other. Version of making the valve in form of spring-loaded needle is available. EFFECT: enhanced reliability. 2 cl, 3 dwg