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Diesel fuel injection priming system

A technology for starting oil injection and fuel injection, which is applied in fuel injection devices, low-pressure fuel injection, charging systems, etc., and can solve problems such as inability to restart

Inactive Publication Date: 2012-07-11
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These vapors will inhibit the operation of the injectors, preventing the engine from restarting after the fuel system has been primed with fuel normally

Method used

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  • Diesel fuel injection priming system
  • Diesel fuel injection priming system

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Embodiment Construction

[0010] The following description is for illustration only and is not intended to limit the disclosure and its application or use.

[0011] see figure 1 , the diesel engine 10 having the fuel injection priming system of the present invention will be described below. The engine system 10 includes an engine 12 having an engine block defining a plurality of cylinders 14 and a plurality of pistons 16 respectively disposed within respective respective cylinders 14 .

[0012] Each cylinder 14 in engine 12 is supplied fuel by a fuel supply system. The fuel supply system includes a fuel tank 20 that communicates with a fuel pump 22 and supplies fuel to a fuel supply pipe 26 via a fuel supply pipe 24 . The fuel rail 26 is connected to a plurality of fuel injectors 28 , one for each cylinder 14 . The oil return pipe 30 communicates with the fuel supply pipe 26 and the fuel tank 20 . A controllable pressure relief valve 31 is disposed in the oil return pipe 30 for guiding the fuel in ...

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Abstract

A fuel injection priming system includes a fuel supply line connected to a fuel supply rail. A plurality of piezoelectric fuel injectors are connected to the fuel supply rail. An injector return fuel line is connected to the fuel injectors and in communication with a fuel supply line via a diverter valve to allow pressure fuel from the high pressure fuel pump return line to pressurize the injector return fuel line to backfill the injectors during a priming operation. A fuel restriction device is in communication with the diverter valve to restrict fuel flow through the injector return line toprovide sufficient backfill for the fuel injectors during the priming operation and to allow fuel to pass to the fuel tank from the injector return fuel line during normal operation.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 60 / 975,997, filed September 28,2007. The disclosure of this application is incorporated herein by reference. technical field [0003] The present disclosure relates to fuel injection systems, and more particularly, to a diesel engine fuel injection priming system. Background technique [0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0005] Diesel engines typically use piezoelectric fuel injection systems to inject fuel into the engine. When the fuel in the piezo fuel injection system of a diesel engine runs out, vapors may become trapped in the fuel injector. These vapors will inhibit the operation of the injectors, preventing the engine from restarting after the fuel system has been primed normally with fuel. Contents of the invention [0006] A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M37/20
CPCF02B3/06F02M37/20F02M55/002F02M63/0225F02M69/54F02M63/025
Inventor H·W·哈珀P·赫布尔B·A·奎克
Owner GM GLOBAL TECH OPERATIONS LLC