Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Common-rail fuel injection system fuel supply pump

A technology of fuel injection system and fuel supply pump, which is applied in the direction of charging system, fuel injection pump, fuel injection device, etc., can solve the problems of affecting the sliding property of the plunger, large assembly stress, poor assembly process, etc., to improve performance and Reliability, improve work reliability, improve the effect of assembly and disassembly process

Active Publication Date: 2006-05-17
CHINA FIRST AUTOMOBILE
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the assembly process, problems such as parts slipping and sealing ring deflection are prone to occur, resulting in oil leakage or rework
Therefore, the assembly process of the above structure is poor, and the sealing of the components is difficult to guarantee.
In addition, as described in the above-mentioned European patent specification, due to the large assembly stress, the deformation of the plunger sleeve (11) will be caused, and the inner hole of the plunger sleeve will be deformed and contracted, which will affect the sliding performance of the plunger.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Common-rail fuel injection system fuel supply pump
  • Common-rail fuel injection system fuel supply pump
  • Common-rail fuel injection system fuel supply pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The structural features and assembly conditions of the fuel supply pump of the common rail fuel injection system designed according to the present invention will be described in detail below in conjunction with the accompanying drawings.

[0012] figure 1 Shown is a fuel supply pump for a common rail fuel injection system of a low-emission compression ignition engine (diesel engine) designed according to the present invention. The camshaft (2) installed in the pump body (1) among the figure is driven to rotate by the engine. Rotating camshaft drives oil pumping part (10) and oil delivery pump (not shown among the figure) work through tappet body part (3) and plunger spring (4). When the oil pumping part (10) works, it can provide high-pressure fuel oil with a pressure of 160MPa or higher to the common rail pipe.

[0013] figure 2 Shown is the structure of the oil pumping part (10) in this embodiment. Among them, the oil pumping part (10) consists of a plunger slee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a fuel-feeding pump of common rail injection system applicable to vehicle low-discharge compression ignition engine. It is mainly characterized by that external peripheral surface of valve seat in its fuel-pumping component has screw threads, the valve seat is fixed in the screw hole of plunger bushing and can be used for making orifice plate be lightly pressed on the sealed end face of plunger bushing. Besides, on the valve seat several circular holes for mounting and removal are set, and the sealing ring is mounted in the circular groove positioned in the middle of clamping nut.

Description

technical field [0001] The invention relates to a fuel supply pump for a common rail fuel injection system of an internal combustion engine, in particular to a fuel supply pump suitable for a common rail fuel injection system of a low-emission compression ignition engine (diesel engine) used in vehicles. Background technique [0002] In order to meet the increasingly stringent emission regulations, it is necessary to improve the control accuracy of fuel injection quantity and fuel injection timing, and to precisely control the fuel injection rate of each cylinder of the engine. Electronically controlled common rail fuel injection system is a new technology that can meet the above requirements. In the common rail fuel injection system, the high-pressure fuel supply pump driven by the engine provides high-pressure fuel to the common rail pipe, and the common rail pressure can reach 160MPa or higher. One or more oil pumping components are mounted on the oil supply pump. The s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02M59/46F02M63/02
Inventor 张礼林胡森峰庄福如杨凯
Owner CHINA FIRST AUTOMOBILE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com