Oil sprayer, electric-control oil spray system and control method thereof

Abstract

The invention discloses an oil sprayer. When a needle valve 3 is in contact with an upper stop point contact surface 8 of the needle valve, a first conductive material A and a second conductive material B form a first conductive loop through the needle valve 3; and when the needle valve 3 is in contact with a lower stop point contact surface 9 of the needle valve, the first conductive material A and a third conductive material C form a second conductive loop through the needle valve 3. A conduction signal of the first conductive loop and the second conductive loop is detected, and position information of the needle valve 3 can be precisely obtained, so that oil spraying amount can be precisely controlled, and consistency and stability of oil spraying amount are realized, and therefore, CO2emission is reduced.

Description

technical field [0001] The invention relates to the technical field of diesel systems, and more specifically relates to a fuel injector, an electronically controlled fuel injector system and a control method thereof. Background technique [0002] After years of development, the electronically controlled fuel injection system has been continuously improved in terms of reducing fuel consumption, improving power and reliability. As one of the four core components of the diesel system, the fuel injector has become the focus of the development of common rail technology in recent years. The electronically controlled fuel injector is the most difficult component in design and process in the electronically controlled common rail system, and it is also the component with the most varieties in the electronically controlled common rail system so far. [0003] With the continuous improvement of energy saving and emission reduction requirements, higher requirements are placed on the fuel...

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Problems solved by technology

[0004] In the prior art, the position change of the needle valve in the fuel injector is reflected by the change of pressure. However, due to the great influence of the pressure fluctuation at the nozzle, the detected position of the needle valve is inaccurate, which in turn affects the accuracy of the injection; the detection by adding a sensor The position of the needle valve in the injector is risky and affects the reliability of the injector

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