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Fuel injector

A technology of fuel injectors and injectors, applied in fuel injection devices, fuel injection devices with sensors, instruments, etc., can solve problems such as pressure sensor damage

Inactive Publication Date: 2011-07-06
DELPHI INT OPERATIONS LUXEMBOURG S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This configuration is disadvantageous because the pressure sensor may be damaged during assembly and maintenance of the engine components

Method used

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  • Fuel injector
  • Fuel injector
  • Fuel injector

Examples

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Embodiment Construction

[0042] In the remainder of this document, the terms "upper" and "lower" refer to the orientation of the fuel injectors in the respective figures. However, it should be appreciated that, in use, the fuel injectors may be arranged in any suitable spatial orientation. The terms "outer" and "inner" are used with reference to an origin located on the longitudinal axis of the fuel injector.

[0043] see Figures 1 to 3 , in a first embodiment of the present invention, a fuel injector 20 is provided that includes a generally tubular injector body 22 . The injector body 22 houses components mounted to allow control of fuel passage from a fuel inlet 24 to an outlet 26 provided in a nozzle housing 28 adjacent the lowermost end of the injector body 22 . Such a component arrangement and its operation are described, for example, in the applicant's European patent EP 0995901 B. In this arrangement, in use, the piezoelectric actuator controls the movement of the valve needle housed in the...

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PUM

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Abstract

A fuel injector comprises an injector body (22; 22f), a capnut (38; 38c; 38f), and a pressure sensor (72a-f) exposed to pressure changes in a combustion chamber (51) in use, wherein the pressure sensor (72a-f) is accommodated within the capnut. Optionally, the fuel injector further comprises a signal cable (98; 98f) external to the injector body (22) to connect with the pressure sensor (72a-f).

Description

technical field [0001] The present invention relates to fuel injectors for internal combustion engines. More specifically, the present invention relates to a fuel injector with an integrated pressure sensor for determining the pressure in the combustion chamber of the engine. Background technique [0002] During operation of an internal combustion engine, the combustion of fuel takes place in one or more combustion chambers defined in part by associated cylinders disposed in the engine block. The capacity of each combustion chamber is determined by the position of the reciprocating piston, and gases are admitted to and discharged from the combustion chambers through inlet and discharge valves provided in the cylinder head. The gas pressure in the combustion chamber at a given time is determined by parameters such as piston position and valve opening or closing configuration. [0003] In a diesel engine (compression ignition), fuel is admitted to the combustion chamber thro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06F02M57/00
CPCG01L23/10F02M51/005G01L23/145F02M57/005G01L23/16F02M61/14F02D35/023G01L23/223G01L23/222F02D35/02G01L23/18F02M61/16F02M2200/24Y10T29/49298
Inventor M·P·库克
Owner DELPHI INT OPERATIONS LUXEMBOURG S A R L
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