The invention discloses an energy-saving high-pressure common-rail electronic-control oil
injector. The energy-saving high-pressure common-rail electronic-control oil
injector is characterized in that a high-speed
electromagnetic valve is of a built-in structure and is compressed by a butterfly spring, and compressing force on the high-speed
electromagnetic valve can be adjusted by the aid of an adjusting
gasket; a hydraulic
servo mechanism is positioned on the lower portion of the high-speed
electromagnetic valve and is mounted inside an oil
injector body; a control valve is provided with a positioning plane and a high-pressure sealing spherical surface, so that influence of accumulated
machining errors on components can be reduced; a
needle valve assembly comprises a
needle valve body, a
needle valve, a clip type spring seat, a spring and a sleeve. The energy-saving high-pressure common-rail electronic-control oil injector has the advantages that the needle valve body has an oil-passage-free character, and accordingly the production cost can be reduced; a large
conical surface is arranged on the top of the needle valve,
throttle holes and a circular groove are formed in the upper portion of the needle valve, a small cylinder is arranged in the middle of the needle valve, a spiral groove is formed in the lower portion of the needle valve, a
throttle hole is formed in the sleeve, and the sleeve, the needle valve and the needle valve body are matched with one another, so that the electronic-control oil injector is quick in response, free of leakage and low in oil return,
power consumption and
fuel oil consumption of a high-pressure common-rail
diesel engine can be reduced, emission of the
diesel engine can be improved, and the energy-saving high-pressure common-rail electronic-control oil injector is particularly applicable to repeated injection common-rail diesel engines.