An energy-saving high-pressure common rail electronically controlled fuel injector

Abstract

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.

Description

technical field [0001] The invention relates to a high-pressure common rail electronically controlled fuel injector, and belongs to the technical field of fuel injection devices for fuel injection systems of internal combustion engines. Background technique [0002] With the increasingly stringent emission regulations and the aggravating energy crisis, people's requirements for the performance indicators of internal combustion engines, such as emission and economy, are constantly increasing. How to reduce diesel engine emissions, reduce fuel consumption and diesel engine power consumption has become a must for the design of diesel engine fuel systems. important issues to face. The characteristics of high pressure, high response, flexible control, and multiple injections of the high-pressure common rail system have the potential to meet increasingly stringent emission regulations and users' requirements for fuel economy and emission. [0003] In order to improve the response...

AI Technical Summary

Problems solved by technology

However, the method of improving the response speed of the system by means of optimizing the high-speed solenoid valve is costly and the cycle is long, and due to the space limitation of the injector body, the space for improving the electromagnetic force is limited

In addition, the current high-pressure common rail electronically controlled fuel injector still has the disadvantages of large radial leakage of high-pressure fuel and large oil return during the injection period of the electronically controlled injector, which leads to large power loss of the internal combustion engine, which is not conducive to improving the fuel efficiency of the internal combustion engine. economy

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