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Diesel fuel injection priming system

A technology of fuel injection and fuel injectors, which is applied in the direction of fuel injection devices, charging systems, engine starting, etc.

Inactive Publication Date: 2009-04-01
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Injectors may not function properly when filled with unpressurized vapor / fuel mixture

Method used

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

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Embodiment Construction

[0011] The following description is merely exemplary in nature and is not intended to limit the application or uses of the invention.

[0012] Referring to FIG. 1 , a diesel engine system 10 having a fuel injection priming system in accordance with the principles of the present invention will now be described. The engine system 10 includes an engine 12 having an engine block defining a plurality of cylinders 14 and a plurality of pistons 16 disposed in respective ones of the plurality of cylinders 14 .

[0013] A fuel supply system is provided to supply fuel to each cylinder 14 of the engine 12 . The fuel supply system includes a fuel tank 20 in communication with a fuel pump 22 that supplies fuel to a fuel rail 26 via a fuel supply line 24 . The fuel rail 26 is connected to a plurality of fuel injectors 28 , each fuel injector 28 corresponding to a respective cylinder of the plurality of cylinders 14 . A return fuel line 30 communicates with a pressure control valve 31 conn...

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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 device to allow high pressure fuel from the fuel supply line to pressurize the injector return fuel line to backfill the injectors during a priming operation. A one-way valve is in communication with the diverter device to manage the pressurized fuel provided to the plurality of fuel injectors during the priming operation and to allow fuel to pass to the fuel tank during normal operation.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 60 / 975,983, filed September 28, 2007. The disclosures of the aforementioned applications are hereby incorporated by reference. technical field [0003] The present application relates to a fuel injection system and in particular to a fuel injection priming system for a diesel engine. 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 for injecting fuel into the engine. When a diesel engine's piezoelectric fuel injection system runs out of fuel, vapors can become trapped in the fuel injector. These vapors may prevent the engine from restarting after priming the fuel system with fuel during normal priming. Injectors may not function properly when filled with an...

Claims

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Application Information

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IPC IPC(8): F02M63/00F02N99/00
CPCF02B3/06F02M55/002F02M37/20F02M55/02F02M63/0225
Inventor P·赫布尔H·W·哈珀
Owner GM GLOBAL TECH OPERATIONS LLC