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Fault isolation in electronic returnless fuel system

A technology of fuel system and fuel delivery system, applied in the field of fuel delivery system

Inactive Publication Date: 2013-08-21
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This reactive diagnosis may not occur until vehicle performance is already compromised

Method used

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  • Fault isolation in electronic returnless fuel system
  • Fault isolation in electronic returnless fuel system
  • Fault isolation in electronic returnless fuel system

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Embodiment Construction

[0115] Referring now to the drawings, which are shown for purposes of illustrating some exemplary embodiments only and not for purposes of limiting said embodiments, figure 1Vehicle 10 including fuel delivery system 20 is schematically shown. The fuel delivery system 20 may be an electronic return-free fuel system (ERFS), which may include an ERFS controller 50 . In ERFS, a fuel tank 24 containing a supply of fuel 23 (eg, gasoline, ethanol, E85, or other combustible fuel) is sealed from the surrounding environment and lacks a dedicated fuel return line. A fuel pump 28 , such as a roller cell pump or gerotor pump, is submerged in fuel 23 within fuel tank 24 and is operable in response to control from ERFS controller 50 and The fuel 23 is supplied to the internal combustion engine 12 in response to the feedback signal. The fuel rail 30 is in fluid communication with fuel injectors of the internal combustion engine 12 . Although figure 1 A vehicle is shown schematically, but ...

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Abstract

The invention refers to fault isolation in an electronic returnless fuel system. A method for detecting and isolating an actual fault in a fuel delivery system having a fuel pump and a fuel pump motor, includes monitoring fuel pressure, pump current, and pump voltage. Each of a plurality of fault triggers are designated as one of flagged and un-flagged based on at least one of the fuel pressure, the pump current and the pump voltage. The actual fault in the fuel delivery system is isolated from a plurality of possible faults when a condition respective to one of the possible faults is satisfied based on at least one of the plurality of fault triggers designated as flagged and un-flagged.

Description

technical field [0001] The present invention relates to fuel delivery systems. Background technique [0002] The statements in this section merely provide background information related to the present disclosure. Accordingly, this content is not intended to constitute an admission of prior art. [0003] It is desirable to supply fuel to internal combustion engines in a continuous and reliable manner. A typical vehicle fuel system includes a fuel pump that is submerged in a fuel tank. Fuel filters and pressure regulators may be positioned on respective inlet and outlet sides of the fuel pump. The filtered fuel is thus delivered to a fuel rail where it is ultimately injected into engine cylinders. The Electronic Returnless Fuel System (ERFS) includes a sealed fuel tank and lacks a dedicated fuel return line. These and other features of ERFS help minimize vehicle emissions. [0004] Conventional diagnostic techniques for vehicle fuel systems typically rely on knowledge of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/04
CPCF02D41/22F02D41/3082F02D2041/2058F02D2041/224F02D2041/225F02D2200/0602F02M37/08
Inventor Y.A.霍奈姆
Owner GM GLOBAL TECH OPERATIONS LLC