CN101408143B - 柴油机燃料喷射起动注油系统 - Google Patents

柴油机燃料喷射起动注油系统 Download PDF

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Publication number
CN101408143B
CN101408143B CN2008101619297A CN200810161929A CN101408143B CN 101408143 B CN101408143 B CN 101408143B CN 2008101619297 A CN2008101619297 A CN 2008101619297A CN 200810161929 A CN200810161929 A CN 200810161929A CN 101408143 B CN101408143 B CN 101408143B
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fuel
return tube
feed pipe
sparger
injectors
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Expired - Fee Related
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CN101408143A (zh
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H·W·哈珀
P·赫布尔
B·A·奎克
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

一种燃料喷射起动注油系统，包括与燃料分供管连接的燃料供给管。多个压电式燃料喷射器与所述燃料分供管连接。喷射器回油管与所述燃料喷射器连接，并通过换向阀与燃料供给管连通，用以在起动注油过程中使来自所述高压燃料泵回油管的压力燃料对所述喷射器回油管加压，从而使燃料回送到所述喷射器中。燃料节流装置与所述换向阀连通，以在起动注油操作过程中限制燃料流经喷射器回油管从而提供足够的燃料回送到燃料喷射器中，并在正常操作中使来自喷射器回油管的燃料流入燃料箱。

Description

柴油机燃料喷射起动注油系统
相关申请的交叉引用
本申请要求2007年9月28日提交的美国临时申请第60/975,997号的权益。在以引用方式将该申请的公开内容并入本文。
技术领域
本公开涉及燃料喷射系统，更具体地，涉及一种柴油机燃料喷射起动注油系统。
背景技术
本节所述内容仅仅是为了提供与本发明有关的背景信息，可能并不构成现有技术。
柴油发动机通常使用压电式燃料喷射系统来将燃料喷射入发动机。当柴油发动机压电式燃料喷射系统中的燃料用尽时，在燃料喷射器中可能会捕集到蒸气。这些蒸气将抑制喷射器的操作，使发动机在燃料系统用燃料进行了正常的起动注油后无法重新起动。
发明内容
一种燃料喷射起动注油系统包括与燃料分供管连接的燃料供给管。多个压电式燃料喷射器与所述燃料分供管连接。喷射器回油管与所述燃料喷射器连接，并通过换向阀和回油节流装置与加压油管连通，用以在起动注油操作过程中让来自所述加压油管的燃料对所述喷射器回油管加压并回送到所述喷射器中。
根据本文的描述，人们很容易清楚本发明的其它应用领域。应该理解，本文的描述和具体实施例仅用于示例说明，并不用于限制本公开的范围。
附图说明
本公开的附图仅用于示例说明的目的，而不以任何形式来限制本公开的范围。
图1是具有本发明燃料喷射起动注油系统的柴油发动机系统的示意图。
具体实施方式
下面的描述只用于举例说明，并不用于限制本公开及其应用或使用。
参见图1，下面将对具有本发明燃料喷射起动注油系统的柴油发动机10进行描述。发动机系统10包括发动机12，该发动机12具有发动机机体，该发动机机体限定了多个汽缸14以及分别设置在各自相应汽缸14中的多个活塞16。
由燃料供给系统向发动机12中的每个汽缸14供给燃料。该燃料供给系统包括燃料箱20，该燃料箱20与燃料泵22连通，并经由燃料供给管24将燃料供给到燃料分供管26。燃料分供管26与多个燃料喷射器28连接，每个喷射器28对应一个汽缸14。回油管30与燃料分供管26及燃料箱20相连通。回油管30中设置有可控泄压阀31，用以将燃料分供管26中的燃料通过回油管30导回燃料箱20中。喷射器回油管32与喷射器28连接，并通过调压阀36、换向阀38及回油节流装置40与燃料箱20连通。调压阀36与喷射器回油管32相连通，以调节/保持供给到喷射器28中的燃料的压力。换向阀38可以是电子阀或机械阀，在起动注油操作过程中，可对其进行控制，以将来自高压燃料泵回油管39的加压燃料供给到喷射器28中。
回油节流装置40与换向阀38相连通，以对流入燃料箱20中的燃料加以限制，足以使得来自高压燃料泵回油管39的燃料能够被回送到喷射器28中，从而消除了可能在燃料用尽后被捕集到的蒸气。
燃料喷射器28可采用压电式燃料喷射器。当柴油发动机压电式燃料喷射系统的燃料用尽时，在燃料喷射器28中可能会捕集到蒸气。这些蒸气将使发动机12在燃料系统用燃料进行了正常的起动注油后无法重新起动。当充满不可压缩的蒸气/燃料混合物时，喷射器28可能无法正常工作。通过换向阀38和节流旁路装置40对喷射器回油管32进行增压，压电式喷射器适当的起动注油使发动机能够重新启动。通过利用节流旁路装置40经由换向阀38供给的压力来提供足够的压力以使燃料回送到喷射器回油管32，起动注油系统可提供适当的回油压力，以使压电式喷射器能够根据重新启动发动机所需的要求来运行。

Claims (4)

1.一种用于柴油发动机的燃料喷射起动注油系统，包括：
燃料箱；
燃料供给管，与所述燃料箱连接；
多个燃料喷射器，与所述燃料供给管连接；
喷射器回油管，与所述多个燃料喷射器连接，且通过换向阀与高压燃料泵回油管相连通，所述换向器可被选择性地控制，以在起动注油过程中允许来自燃料供给管中的燃料对所述喷射器回油管加压；以及
燃料节流装置，与所述换向阀连通，从而对所述喷射器回油管充分加压以使燃料回送到所述多个燃料喷射器中，并使燃料在正常操作中流入燃料箱。
2.如权利要求1所述的燃料喷射起动注油系统，其特征在于，所述燃料供给管包括燃料泵。
3.一种柴油发动机系统，包括：
限定了多个汽缸的发动机机体；
多个活塞，分别设置在对应的一个所述汽缸中；
燃料箱；
燃料供给管，与所述燃料箱连接；
燃料分供管，与所述燃料供给管连接；
多个燃料喷射器，与所述燃料分供管连接，并且分别与所述多个汽缸中的对应汽缸连通；
喷射器回油管，与所述燃料分供管连接，并通过换向阀与所述燃料供给管连通，所述换向器可被选择性地控制，以在起动注油过程中使来自高压燃料泵回油管的燃料对所述喷射器回油管加压；以及
燃料节流装置，与所述换向阀连通，从而对所述喷射器回油管充分加压以使燃料回送到所述多个燃料喷射器中，并使得燃料正常操作中流入燃料箱。
4.如权利要求3所述的发动机系统，其特征在于，所述燃料供给管包括燃料泵。
CN2008101619297A 2007-09-28 2008-09-27 柴油机燃料喷射起动注油系统 Expired - Fee Related CN101408143B (zh)

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US97599107P 2007-09-28 2007-09-28
US60/975991 2007-09-28
US12/204199 2008-09-04
US12/204,199 US7568471B2 (en) 2007-09-28 2008-09-04 Diesel fuel injection priming system

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CN101408143B true CN101408143B (zh) 2012-07-11

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US20090084361A1 (en) 2009-04-02
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