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High-pressure common-rail electronic control oil injector

An electronically controlled fuel injection, high-pressure common rail technology, applied in machine/engine, fuel injection device, special fuel injection device, etc., to achieve good effects of energy saving, emission reduction, and engine noise reduction

Active Publication Date: 2013-01-30
北油电控燃油喷射系统(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to disclose a high-pressure common rail electronically controlled fuel injector to solve the technical problem of improving the injection stability of small fuel volume

Method used

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  • High-pressure common-rail electronic control oil injector
  • High-pressure common-rail electronic control oil injector
  • High-pressure common-rail electronic control oil injector

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Such as Figure 1-9 As shown, a high-pressure common-rail electronically controlled fuel injector is disclosed, the high-pressure common-rail electronically controlled fuel injector is driven by a solenoid valve 12, the oil needle 18 is connected with the control plunger 17, and the control plunger 17 is equipped with a control valve The sleeve 16 and the force of the oil needle spring 13 make the oil needle 18 top mounted on the sealing seat surface 28 of the needle valve body, the lower part of the oil needle 18 is clamped in the needle valve body 6, and the cooperation between the needle valve body 6 and the oil needle 18 The conical surfaces form a certain inclination angle with the vertical direction. For the convenience of description, the outer contact surfaces of the oil needle 18 and the needle valve body 6 are r...

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PUM

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Abstract

Disclosed is a high-pressure common rail electric control fuel injector which includes a fuel injector body (1), a nozzle body (6) and a fuel needle-plunger unit. In the fuel injector body (1) and the nozzle body (6), a volume chamber (5) is formed between a lower end of a plunger (17) and a sealing seat surface (28) of the nozzle body (6). In the volume chamber (5), an annular throttle passage is formed between a fuel needle (18) and the nozzle body (6). The annular throttle passage has the minimum flow cross-sectional area when the fuel needle (18) is seated on the sealing seat surface (28). The varying of the flow cross-sectional area of the annular throttle passage makes the fuel pressure in the volume chamber (5) below the annular throttle passage lower than the fuel pressure in the volume chamber (5) above the annular throttle passage during initial open period or close period of the fuel needle (18). The high-pressure common rail electric control fuel injector can stably control the little-fuel injection and can realize the good effect of reducing the engine noise.

Description

technical field [0001] The invention 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 the inevitable development direction of fuel injection systems. The high-pressure common rail fuel injection system is the main development direction of today's diesel engine fuel injection system, and the high-pressure common rail electronic control injector is the core key component of the high-pressure common rail fuel injection system, which determines the response speed of the high-pressure common rail fuel injection system, Many key parameters such as fuel injection rate and reliability. [0003] Existing high-pressure common rail electronically co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06F02M47/00F02M61/10
CPCF02M47/027F02M45/12F02M55/008F02M61/12F02M61/205F02M63/0056F02M2200/28
Inventor 尤利李春燕
Owner 北油电控燃油喷射系统(天津)有限公司