High voltage common rail electronic control injector

An electronically controlled fuel injection, high-pressure common rail technology, applied to machines/engines, fuel injection devices, engine components, etc., can solve the problems of reducing the response speed and control accuracy, aggravating the impact of the needle valve seat surface, and poor stability. The effect of speeding up hydraulic response, reducing mass, and improving rapidity

Inactive Publication Date: 2009-04-01
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slender control piston has high flexibility, poor stability and high inertia, which reduces the response speed and control accuracy, and will aggravate the impact on the needle seat surface when closing

Method used

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  • High voltage common rail electronic control injector
  • High voltage common rail electronic control injector
  • High voltage common rail electronic control injector

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Embodiment Construction

[0019] The specific structure, working principle and working process of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 2 As shown in Figure 3, a high-pressure common rail electronically controlled fuel injector according to the present invention includes an oil return pipe joint 1, an electrical joint 2, a solenoid valve 3, a high-pressure oil joint 4, a main oil passage 5, and an oil return passage 12 , the oil drain hole 6, the oil inlet hole 7, the control chamber 8, the needle valve spring 10, the spring seat 15 under the needle valve spring, the fuel injection nozzle 11 and the needle valve 13 arranged in the fuel injection nozzle, the solenoid valve 3 is placed on the top of the injector; the control chamber 8 is set on the upper part of the spring seat 15 of the needle valve spring, and the needle valve spring 10 is installed in the control chamber 8; an oil drain passage 17 is provided insid...

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PUM

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Abstract

The invention discloses a high-pressure common-rail electrically controlled fuel injector, pertaining to the field of automobile parts. The invention relates to a fuel injection system of a diesel engine and particularly relates to a high-pressure common-rail electrically controlled fuel injector applied to a high-pressure common-rail fuel injection system. An excellent working environment of an electromagnet is ensured by means of a layout that an electromagnetic valve is arranged at the top so as to facilitate the obtaining of enough electromagnetic forces. Furthermore, the electromagnet can adapt to the application condition of the limitation to the mounting space at the lower part of the fuel injector; a control piston structure is saved by means of a layout that a control chamber is arranged at the bottom and the upper surface of a needle valve is directly adopted to form a part of the wall face of the control chamber, thereby not only reducing the spillage of the needle valve, but also reducing the weight of a moving part, quickening the response speed of a hydraulic response section, reducing the seating impact force of the needle valve and improving the rapidity, the accuracy and the reliability of the electrically controlled fuel injector.

Description

technical field [0001] The invention belongs to the scope of auto parts and relates to a high-pressure common rail fuel injection system, in particular to a high-pressure common rail electronically controlled fuel injector. Background technique [0002] Today, the automotive industry has higher and higher requirements for emission, economy, and reliability. In order to improve the performance of diesel engines, high-pressure, refined, and smart fuel injection is an inevitable direction for the development of fuel injection systems. The high-pressure common rail fuel injection system is the main development direction of the current diesel engine fuel injection system, and the high-pressure common rail electronically controlled injector is the core key component of the high-pressure common rail fuel injection system, which determines the maximum injection pressure of the high-pressure common rail fuel injection system, Response speed, maximum fuel injection rate, reliability a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M47/02F02M51/06F02M61/20
Inventor 周明李立国李慧
Owner TSINGHUA UNIV
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