High-pressure common rail oil atomizer cylindrical surface hemispherical control valve

Abstract

The invention discloses a high-pressure common rail oil atomizer cylindrical surface hemispherical control valve mainly used for a high-pressure common rail fuel system oil atomizer device. The high-pressure common rail oil atomizer cylindrical surface hemispherical control valve comprises a high-speed electromagnetic valve, an armature hemisphere, a guiding block, a valve body, a high-precision conical surface, an oil outlet throttling hole and the like. The high-pressure common rail oil atomizer cylindrical surface hemispherical control valve has the beneficial effects that the high-pressurecommon rail oil atomizer cylindrical surface hemispherical control valve is similar to domestically-disclosed diesel engine oil atomizer coupled pieces suitable for multiple kinds of fuel, but the problem that the control valve coupled piece conical face seal face contact area is small, the generated impact pressure is too high, abrasion is likely to be caused, and materials are fatigue and peeloff is solved. The cylindrical surface hemispherical control valve is adopted, the contact manner that the control valve closes a high-pressure oil path is enhanced into the face contact from line contact, and seal effectiveness is greatly improved; and according to the control valve, through precision fitting of hole walls of a middle hole and an inner hole of an upper guiding plate and the armature hemisphere cylindrical surface, accurate guiding is achieved, and meanwhile the control valve key core part machining difficulty is greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of fuel injectors of various high-pressure common rail fuel systems, and in particular relates to a cylindrical hemispherical control valve of a high-pressure common rail fuel injector. Background technique [0002] The development of diesel vehicles has become an important strategy for the automobile industry of various countries. With the increase in the number of construction machinery and transport vehicles in various countries in the world, the exhaust gas emitted by diesel engines has become one of the main causes of pollution to the earth's environment. How to take measures to protect the earth's environment on which human beings depend is an urgent task. Since the 1980s, my country has formulated relevant standards accordingly, taking environmental protection as a major issue. At the same time, countries around the world have also begun to find and explore other methods and adopt other effective tec...

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Problems solved by technology

[0003] However, there are still certain defects in the existing device for use. Due to the need to meet the needs of high-speed operation of the engine, the armature hemisphere needs to be continuously squeezed at high speed and high pressure on the sealing surface of the conical surface of the control valve coupler. It is prone to high-speed movement during work, causing friction and heat generation, and causing easy wear and material fatigue and peeling off, thereby reducing the service life of the product;

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