A fuel injector integrating an electronically controlled unit pump

A single unit pump and fuel injector technology, which is applied in fuel injection devices, machines/engines, charging systems, etc., to achieve the effects of convenient processing, reduced processing difficulty and cost, and easy installation

Active Publication Date: 2019-09-13
CHONGQING HONGJIANG MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electronically controlled unit pump and the electronically controlled fuel injector are still connected through high-pressure oil pipes. The problems in this split structure need to be changed urgently.

Method used

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  • A fuel injector integrating an electronically controlled unit pump
  • A fuel injector integrating an electronically controlled unit pump
  • A fuel injector integrating an electronically controlled unit pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] see Figure 1 to Figure 5 The fuel injector that integrates the electronically controlled unit pump is shown, including the pump body 5 of the electronically controlled unit pump, the plunger couple 4 arranged in the pump body, and the column set outside the upper part of the plunger couple. Plug spring 6, its prominent substantive features are: the inner wall of the upper end of a nozzle locking sleeve 1 is threadedly connected with the outer wall of the lower end of the pump body 5, and the inner wall of the nozzle locking sleeve 1 is sequentially connected from bottom to top. A nozzle assembly 2 and an oil outlet valve assembly 3 are provided, and the upper end of the oil outlet valve assembly is in close contact with the lower end of the plunger couple 4; a gear 7, a rack 8 and a gear 8 are arranged on the upper part of the pump body 5 Driving rod 11, the l...

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PUM

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Abstract

The invention relates to a fuel injector integrating an electronic unit pump. The fuel injector comprises a pump body of the electronic unit pump, a plunger and barrel assembly and a plunger spring externally sleeving the upper part of the plunger and barrel assembly; the inner wall of an upper end part of a nozzle lock sleeve is in screw-thread fit connection to the outer wall of a lower end part of the pump body; a nozzle assembly and a delivery valve assembly are successively arranged in the nozzle lock sleeve from bottom to top; the upper end of the delivery valve assembly leans against the lower end of the plunger and barrel assembly; a gear, a rack and a lifting lever are arranged in the upper part of the pump body, the lower end of the lifting lever is matched with the upper end part of the plunger and barrel assembly and the upper end thereof is engaged with the gear, and the gear is engaged with the rack; and a fuel inlet connector and a fuel return connector are connected to two sides of the pump body, respectively. The fuel injector provided by the invention is concise and compact in structure and convenient to mount; fuel can be prevented from leaking to an upper lubricating cavity of the pump body to pollute lubricating oil, and the machining difficulty and cost of the pump body can be reduced, and the service life of the pump body is prolonged.

Description

technical field [0001] The invention relates to a diesel engine, in particular to a fuel injector integrating an electronically controlled unit pump, especially suitable for a speed of 600-900 r / min, a single-cylinder rated power of 235-280kW, and a cylinder diameter of φ270-φ310mm. A diesel engine with a stroke of 265-390mm. Background technique [0002] The technology of electronically controlled fuel injection for diesel engines has developed rapidly in recent years, and more and more diesel engines are equipped with electronically controlled fuel injection systems. Usually, the electronically controlled fuel injection system includes electronically controlled unit pump, high-pressure fuel pipe and fuel injector. The rapid response of electronically controlled components is used to realize fast and accurate control of the fuel injection quantity and injection law of the diesel engine, thereby improving the economy and performance of the diesel engine. Power performance, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M57/02
Inventor 彭琦陈廷博
Owner CHONGQING HONGJIANG MACHINERY CO LTD
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