Composite microdisplacement oil jetter of IC engine with piezoelectric control

A technology of fuel injectors and internal combustion engines, which is applied in the direction of machines/engines, fuel injection devices, mechanical equipment, etc., and can solve problems such as difficulty in forming a homogeneous mixture, achieve reduced HC and NOx emissions, high control accuracy, and increase compression ratio Effect
CN1818370AInactive Publication Date: 2006-08-16侯德洋
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
侯德洋
Publication Date
2006-08-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The piezoelectric-controlled micro-displacement combined fuel injector for internal combustion engines belongs to a fuel-injector apparatus for the fuel system of internal combustion engines. Because of being controlled by a piezoelectric element, its fuel-injection correct time is easy to regulate. An internal tapered angle 2 alpha being offset from beta angle is disposed at the outlet of a fuel nozzle. An oil-guide slot is opened on an umbrella-injection internal tapered surface in order to control the appointed area where the oil beam can reach the combustion chamber easily.
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Description

technical field

[0001] The invention relates to a micro-displacement composite fuel injector for an internal combustion engine controlled by piezoelectricity, which belongs to the fuel injection device of the fuel system of the internal combustion engine. Background technique

[0002] At present, most of the fuel injectors that inject fuel into the combustion chamber in the common rail fuel system of internal combustion engines use solenoid valves to control the back pressure acting on the needle valve of the fuel injector. When the back pressure acting on the needle valve is high, the fuel injector does not spray oil; when the back pressure acting on the needle valve is low, the high-pressure oil moves the needle valve up, and the fuel injector injects oil. In recent years, it has been a common method to control the back pressure acting on the needle valve of the injector by using the expansion or contraction deformation of the piezoelectric material when it is electrified,...

Claims

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