Fuel injection executing valve

A fuel injection and actuating valve technology, which is applied to fuel injection devices, charging systems, engine components, etc., can solve the problems of low oil drainage capacity, insufficient oil drainage, and large liquid resistance on the suction surface, so as to improve the overall strength and accuracy, avoid cavitation bubbles, reduce the effect of liquid resistance
CN102758712AInactive Publication Date: 2012-10-31北京天纬燃油喷射技术股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京天纬燃油喷射技术股份有限公司
Publication Date
2012-10-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a fuel injection executing valve which is a part of an electromagnetic valve used in a high-pressure storage type fuel supplying system. The electromagnetic valve is mounted on the upper portion of the fuel supplying system. The fuel injection executing valve comprises an attraction side, a guide shaft and fuel passages. The attraction side is attracted on the lower end face of a thrust sleeve of the electromagnetic when the electromagnetic valve is electrified. The guide shaft in cylindrical structure extends downwards from the center of the back of the attraction side, is penetratingly arranged in a central hole of a guide sleeve fixed in a valve chamber and can slide relatively to the central hole. The guide shaft and the attraction side are integrally formed. The fuel passages are in fuel passage structures communicated with the attraction side and used for guaranteeing that low-pressure fuel flowing out of a fuel outlet throttle hole is sufficiently discharged on the attraction side instantly the executing valve is at high-speed attraction. The fuel passages are uniformly circumferentially arranged along the attraction side at intervals and are communicated with a core portion of the attraction side directly or indirectly. By the executing valve, fuel discharge capability of the attraction side can be effectively guaranteed, electromagnetic force loss can be reduced to the greatest extent, and durability of the integrally formed executing valve is improved effectively.
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Description

technical field

[0001] The invention relates to an engine fuel supply system, in particular to an electromagnetically controlled fuel injection executive valve in an injector of the fuel supply system. Background technique

[0002] Solenoid-controlled actuator valves are used in high-pressure accumulator fuel supply systems. Solenoid valves generally include an actuator valve and a coil. The coil receives the control signal from the engine control unit to control the opening and closing of the actuator valve. The actuator valve controls the pressure in the control chamber which controls the injector action.

[0003] The coil is energized, the executive valve responds and moves, and an orifice is opened, which is the oil outlet of the valve body control chamber to control the pressure in the control chamber, which is applied to the matched valve in the control valve body. Control the plunger and the needle valve of the nozzle, so that the displacement of the control plunge...

Claims

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