High pressure common rail electronic control fuel injector

A technology of electronically controlled fuel injection and high-pressure common rail, which is applied in the direction of machines/engines, fuel injection devices, engine components, etc., can solve problems such as motion sticking, improve reliability, reduce processing costs, and reduce injection pressure loss Effect

Active Publication Date: 2011-10-12
北油电控燃油喷射系统(天津)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to disclose a high-pressure common rail electronically controlled fuel injector, so as to solve the technical defect of possible movement stagnation in the prior art

Method used

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  • High pressure common rail electronic control fuel injector
  • High pressure common rail electronic control fuel injector
  • High pressure common rail electronic control fuel injector

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] Figure 1-4 Disclosed is a high-pressure common rail electronically controlled fuel injector, including a control plunger 17, an oil needle 18, an oil needle sealing seat surface 28, and an injection hole 29. A volume cavity 5 is formed between it and the oil needle seal seat surface 28. The control plunger 17 is provided with a hollow fuel channel 40 in the vertical axis, and the lower part of the oil needle 18 is sandwiched between the oil needle spring 13 and the oil needle seal seat. Between the surfaces 28, the volume chamber 5 communicates with the control chamber 55 through the fuel passage 40 and the oil inlet hole 48, and the control chamber 55 communicates with the transition chamber 59 of the control valve 60 through the oil outlet hole 56, and the transition chamber 59 communicates with the injection nozzle T...

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Abstract

The invention discloses a high pressure common rail electronic control fuel injector which is characterized in that a control cavity is communicated with the transition cavity of a control valve through an oil outlet, the transition cavity is connected with the oil return pipe of the fuel injector, the top of a ball valve is arranged in the oil outlet which is positioned on a seat surface by a magnetic valve spring through an armature, a magnetic valve coil is arranged above the armature, the top of a control plunger is provided with a conical surface which is axially slant outward, a hemispherical connector is arranged on the top of an oil pin, the oil pin is clamped and matched with the conical surface through the connector and is arranged in the control plunger in a penetrating manner,an oil pin groove is arranged on the bareness part, penetrating through the control plunger, of the oil pin, a snap ring is embedded into the oil pin groove, and an elastic part is clamped between the control plunger and the snap ring. The high pressure common rail electronic control fuel injector in the invention has the advantages of providing flexible timing, accurate control, repeatability, high voltage and good fuel oil pulverization function for a diesel motor combustor and having good stability of small-oil-mass jet.

Description

technical field [0001] The invention relates to a high-pressure common rail diesel 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 spray characteristics of the high-pressure common rail fuel injection system, Response speed, fuel injection rate, reliability and many other key parameters. [0003] Existing high-pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M51/06F02M61/10F02M61/12
CPCF02M47/027F02M61/10F02M61/20
Inventor 尤利李春燕
Owner 北油电控燃油喷射系统(天津)有限公司
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