Unlock instant, AI-driven research and patent intelligence for your innovation.

Dual check valve fuel injector with single actuator

A technology of fuel injectors and check valves, which is applied in the direction of fuel injection devices, charging systems, engine components, etc., and can solve problems such as few structures

Inactive Publication Date: 2018-02-02
CATERPILLAR INC
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the field is replete with seemingly complex fuel injectors that purportedly implement a wide range of fuel injection strategies, few of these fuel injector designs have structures suitable for mass production

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
  • Dual check valve fuel injector with single actuator
  • Dual check valve fuel injector with single actuator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] reference Figure 1-3 , The fuel injector 10 includes an injector body 11 that defines a first nozzle outlet group 12, a second nozzle outlet group 13 and a discharge outlet 14. Arranged in the ejector body 11 are a first nozzle cavity 21, a second nozzle cavity 22, a first control cavity 23 and a second control cavity 24. The first check valve member 40 defines the through passage 41 and is positioned entirely inside the injector body 11. The first check valve member 40 includes a closing hydraulic surface 42 that is exposed to the fluid pressure in the first control chamber 23. The first check valve member can move between a closed position and an open position. In the closed position, the first check valve member contacts the first seat 25 on the ejector body 11 and covers the first nozzle outlet group 12 so that the fluid Blocking the first nozzle cavity 21 to the first nozzle outlet group 12, in the open position, the first check valve member does not contact the ...

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

A fuel injector includes first and second check valve members that open and close first and second nozzle outlet sets, respectively, to inject two fuels that differ in at least one of chemical identity, pressure and molecular state. The first check valve member defines a through passage, includes a closing hydraulic surface exposed to fluid pressure in the first control chamber, and moves into and out of contact with a first seat on an injector body. The second check valve member includes a closing hydraulic surface exposed to fluid pressure in a second control chamber, and moves into and out of contact with a second seat located on the first check valve member. A control valve member is movable between first and second positions that respectively block and allow fluid communication between the first and second control chambers and a drain outlet.

Description

Technical field [0001] The present invention relates generally to fuel injectors, and more particularly to fuel injectors having first and second check valve members controlled by a single actuator. Background technique [0002] Over the years, fuel injectors have developed to have an ever-increasing range of capabilities in different injection timings, injection rates, injection configurations, injection pressures, and many other aspects. These expanded capabilities are often accompanied by increased complexity, increased component count, and additional electrical actuators. Recently, the trend in the industry is to equip fuel injectors with the ability to inject two fuels that are different in at least one of chemical characteristics, pressure, and molecular state. Although the field is full of seemingly complex fuel injectors with purportedly implementing a wide range of fuel injection strategies, these fuel injector designs rarely have a structure suitable for mass productio...

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 Patents(China)
IPC IPC(8): F02M51/06F02M61/06
CPCF02M43/04F02M45/086F02M61/045F02M61/1826
Inventor D·R·科尔德伦
Owner CATERPILLAR INC