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

Novel common rail oil injector

A common rail fuel injector and fuel injector technology, which is applied in the direction of machines/engines, fuel injection devices, engine components, etc., can solve problems such as high temperature, affecting the stability and reliability of fuel injectors, limiting fuel injection pressure, etc.

Active Publication Date: 2015-01-07
CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST +1
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More high-pressure fuel will leak into the low-pressure oil circuit, which will increase energy loss and limit the increase of fuel injection pressure, resulting in higher temperature in the low-pressure oil circuit of the injector, which will affect the stability and reliability of the injector. sex

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
  • Novel common rail oil injector
  • Novel common rail oil injector
  • Novel common rail oil injector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] A new type of common rail injector control cavity in the present invention can refer to the attached figure 1 , 2 description of.

[0031] The sliding spool composed of the control piston 1 of the injector, the injector body 3, the orifice plate A 10, the orifice plate B 17, the spool C 8 and the spool D 16, and the ball valve 22 form the control valve. The control chamber 2 has only one oil passage connected to the high-pressure oil passage and the low-pressure oil passage. This oil passage is both the oil inlet passage and the oil outlet passage of the control chamber 2, and there is no throttle hole. The control chamber 2 on the top of the injector body 3 has two oil passages, one oil passage is connected with the high-pressure oil passage and the low-pressure oil passage, and the other oil passage G5 is connected with the bottom oil chamber 6 of the spool C8 to prevent the spool from Oil resistance occurs during the movement, and the bottom 7 of the spool C is gui...

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 invention discloses a novel common rail oil injector. The novel common rail oil injector comprises a control valve consisting of a control piston, an oil injector body, a sliding valve core and a ball valve, wherein a top oil cavity connected with the ball valve is formed in the top of the sliding valve core; a valve core spring is arranged in the top oil cavity for pressing against the top of the sliding valve core; a middle oil cavity is formed in the middle periphery of the sliding valve core, and is communicated with the top oil cavity through a throttle hole; a lower oil cavity communicated with a high-pressure oil inlet way is formed in the lower periphery of the sliding valve core; a bottom oil cavity communicated with a top control cavity of the control piston is formed in the bottom of the sliding valve core; the control cavity is communicated with the middle oil cavity through an oil way; a boss is arranged in the lower oil cavity of the sliding valve core; and the upper surface of the boss fits the top surface of the lower oil cavity to form a sealing ring belt to control the communication between the lower oil cavity and the middle oil cavity. The novel common rail oil injector controls the pressure of the control cavity through the sliding valve core to control the oil injecting process, so that the large reduction of dynamic oil return of the oil injector is realized, and the oil injecting efficiency of the oil injector is improved.

Description

technical field [0001] The invention belongs to the field of fuel injection systems for internal combustion engines, and in particular relates to a novel common rail fuel injector. Background technique [0002] In order to meet increasingly stringent emission regulations, fuel system injection pressures are getting higher and higher. At present, most common rail injectors form a control chamber at the upper end of the control piston, and the control chamber has an oil inlet orifice and an oil outlet orifice. The oil inlet orifice is connected to the high-pressure oil passage, and the oil outlet orifice is connected to the low-pressure oil passage through the solenoid valve. According to its working principle, the fuel injector controls the rise or fall of the fuel pressure in the control chamber, thereby passing The pressure difference controls the axial up and down movement of the control piston of the fuel injector. Similar fuel injectors are disclosed in CN1773098A, CN1...

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
Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/10F02M61/20
Inventor 郭立新缪雪龙宋永平傅立运杨海涛夏兴兰居钰生
Owner CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST
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