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Onboard fuel injector test

A fuel injector, fuel pump technology, used in the testing of fuel injection devices, machine/structural components, engine testing, etc., can solve the problem of no test system, unable to easily locate specific components, etc.

Inactive Publication Date: 2010-02-10
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Without a way to test the system, technicians may not be able to easily target specific components
For example, in the case of fuel injectors, a service technician may replace the entire set of fuel injectors when only one fuel injector is faulty

Method used

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  • Onboard fuel injector test
  • Onboard fuel injector test
  • Onboard fuel injector test

Examples

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Embodiment Construction

[0015] The following descriptions of preferred embodiments are merely illustrative in nature and in no way limit the invention and its application or use. For simplicity, the same reference numbers are used in the drawings to refer to similar elements. As used herein, the term module refers to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated or group) and memory, a combinational logic circuit that executes one or more software or firmware programs Or other suitable components that provide the described functionality.

[0016] now refer to figure 1 , shows a typical engine system 10 . A typical engine system 10 includes an engine 12 having an intake manifold 14 and an exhaust manifold 16 . The engine system 10 also includes a fuel injection system 18 having a fuel rail 20 and a plurality of fuel injectors 22 connected to each cylinder 24 . The engine system 10 also includes a plurality of ignition assemblies 36 coupled...

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PUM

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Abstract

A method of testdiagnosing the operation of each of a plurality of fuel injectors of an internal combustion engine system includes inhibiting ignition of the engine, monitoring a fuel pressure withina fuel rail of the engine and pulsing a fuel injector of the plurality of fuel injectors of the engine. Whether the fuel pressure has stabilized is determined and a pressure differential is calculatedbased on a pre-pulse fuel pressure and a post-pulse fuel pressure when the fuel pressure has stabilized. A technician determines whether the fuel injector is operating properly based on the pressuredifferential.

Description

technical field [0001] The present invention relates to engine systems, and more particularly to systems and methods for determining whether a fuel injector on a direct injection fuel system is having a flow problem. Background technique [0002] The contents in this section merely provide background technology related to the present disclosure and may not constitute prior art. [0003] Internal combustion engine systems include an engine that combusts a fuel and air mixture within cylinders to produce drive torque. More specifically, air is drawn into the engine through the intake manifold and distributed to the cylinders. Air is mixed with fuel, and the air-fuel mixture is burned. Some engines are called direct injection engines, which include a fuel system that injects fuel directly into the cylinders. That is, air is drawn into the cylinder and mixed with fuel within the cylinder itself. The fuel system typically includes a fuel rail that provides fuel to various fue...

Claims

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Application Information

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IPC IPC(8): F02M65/00
CPCF02M65/00F02M65/003
Inventor M·切梅洛
Owner GM GLOBAL TECH OPERATIONS LLC