WO2014000413A1 - V型柴油机用电控高压共轨燃油喷射系统 - Google Patents

V型柴油机用电控高压共轨燃油喷射系统 Download PDF

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Publication number
WO2014000413A1
WO2014000413A1 PCT/CN2013/000705 CN2013000705W WO2014000413A1 WO 2014000413 A1 WO2014000413 A1 WO 2014000413A1 CN 2013000705 W CN2013000705 W CN 2013000705W WO 2014000413 A1 WO2014000413 A1 WO 2014000413A1
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Prior art keywords
common rail
pipe
oil
high pressure
fuel
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PCT/CN2013/000705
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English (en)
French (fr)
Inventor
肖亨琳
韦海
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无锡开普动力有限公司
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Publication of WO2014000413A1 publication Critical patent/WO2014000413A1/zh

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Classifications

    • 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
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—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
    • 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
    • F02M63/0275—Arrangement of common rails
    • F02M63/0285—Arrangement of common rails having more than one common rail
    • F02M63/0295—Arrangement of common rails having more than one common rail for V- or star- or boxer-engines

Definitions

  • the present invention relates to a fuel injection system, and more particularly to an electronically controlled rolling common rail fuel injection system for use in a V-type diesel engine for delivering fuel into an internal combustion engine. Background technique
  • the main feature of the electronically controlled high pressure common rail fuel injection system is that the high pressure in the common rail cavity is directly used for injection, and the common rail chamber is continuously high pressure, and the driving torque required for the high pressure oil pump is much smaller than that of the conventional oil pump.
  • the high pressure common rail fuel injection system can flexibly adjust the oil pressure in the common rail cavity according to the engine load condition as well as the economical and emission requirements, especially optimizing the low speed performance of the engine.
  • the injection timing, the injection amount, and the injection rate are controlled by the solenoid valve on the injector, and the injection amount of the pre-injection and the post-injection and the interval of the main injection in different working conditions can be flexibly adjusted. Therefore, electronically controlled high pressure common rail fuel injection systems have been widely used. Summary of the invention
  • the object of the present invention is to overcome the deficiencies of the conventional mechanical fuel injection system and to provide an electronically controlled high pressure common rail fuel injection system for a V-type diesel engine.
  • an electronically controlled high pressure common rail fuel injection system for a V-type diesel engine comprising a common rail pump, a common rail pipe distributor, a first common rail pipe, a second common rail pipe, and a first spray Oiler, second injector, electronic control unit and various types of sensors; the oil inlet of the common rail pump is connected with the fuel tank, and the oil outlet of the common rail pump is connected with the common rail distributor through a high pressure oil pipe.
  • the rail pipe distributor is respectively connected to the first common rail pipe and the second common rail pipe through the first high pressure main oil pipe and the second high pressure main oil pipe;
  • the first common rail pipe is installed on one side of the first row cylinder of the V type diesel engine
  • the first injectors on the cylinders in the first row of cylinders are respectively connected to the first common rail through the first high pressure oil pipe, and the oil return port of the first injector passes through the first oil return pipe and the fuel tank Connecting;
  • the second common rail tube is installed on one side of the second row cylinder of the V-type diesel engine, and the second injectors on each cylinder of the second column cylinder respectively pass the second high pressure oil pipe and the second common rail a pipe connection, the oil return port of the second injector is connected to the oil tank through a second oil return pipe;
  • the control unit is used to collect the state parameters of the engine and common rail fuel injection system monitored by various sensors, and sends precise control signals through the built-in control strategy and data AP to drive the corresponding
  • the common rail pipe distributor is respectively provided with a rail pressure sensor and a pressure limiting valve component, and the pressure limiting valve component is connected to the fuel tank through the third oil return pipe, when the rail pressure exceeds the limit value When the pressure limiting valve member is opened under pressure, the high pressure fuel is vented back to the tank through the third return line.
  • the common rail pump is mainly composed of an oil pump and a high pressure oil pump, and the oil pump is installed at one end of the high pressure oil pump, and the oil inlet port of the oil pump is connected to the oil tank through the oil pipe, and the oil outlet of the oil pump passes through the oil pipe.
  • the oil inlet is connected, and the oil pump outlet of the pressure oil pump is connected to the common rail pipe distributor through the high pressure oil pipe, and the oil return port of the high pressure oil pump is connected to the fuel tank through the fourth oil return pipe.
  • the invention has the advantages that the V-type diesel engine of the electronically controlled high-pressure common rail fuel injection system of the invention reduces the emission, improves the economy, automatically controls the operation, and has high reliability.
  • Embodiment 1 is a structural diagram of Embodiment 1 of the present invention.
  • Embodiment 2 is a structural diagram of Embodiment 2 of the present invention. detailed description
  • the electronically controlled high pressure common rail fuel injection system of the first embodiment is used on a V-type 12-cylinder diesel engine.
  • the electronically controlled rolling common rail fuel injection system mainly comprises a common rail pump 1, a common rail pipe distributor 2, a first common rail pipe 3, a second common rail pipe 4, a first injector 5, and a second injector. 6.
  • Various types of sensors 8 high pressure oil pipe 9, first high pressure main oil pipe 10, second high pressure main oil pipe 11, second high pressure oil pipe 13, first oil return pipe 14, and second oil return pipe 15
  • the third oil return pipe 16, the pressure limiting valve member 17, the fourth oil return pipe 18 and the oil tank 19 are composed of components.
  • the oil inlet of the common rail pump 1 is connected to the oil tank 19, and the oil outlet of the common rail pump 1 is connected to the common rail distributor 2 through the high pressure oil pipe 9, the common rail distributor 2 is connected to the first common rail 3 and the second common rail 4 through the first high pressure main oil pipe 10 and the second high pressure main oil pipe 11, respectively;
  • the first common rail pipe 3 is installed in the first column of the V type 12 cylinder diesel engine
  • One side of the cylinder, the first row of cylinders has six cylinders, and the first injectors 5 on each cylinder are respectively connected to the first common rail 3 through the first high pressure oil pipe 12, the first injector The oil return port of 5 is connected to the oil tank through the "" oil return pipe 14;
  • the second common rail pipe 4 is mounted on one side of the second row cylinder of the V-type 12-cylinder diesel engine, and the second column cylinder also has six
  • the second injector 6 on each cylinder is connected to the second common rail 4 through the second high pressure oil pipe 13 respectively, and the oil return port of the
  • the common rail pump 1 in Embodiment 1 is mainly composed of an oil pump la and a high pressure oil pump lb.
  • the oil pump la is installed at the lb-end of the high pressure oil pump, and the oil inlet port of the oil pump is connected to the oil tank 19 through the oil pipe, and the oil pump la
  • the oil outlet is connected to the oil inlet of the high pressure oil pump lb through the oil pipe, and the oil outlet of the high pressure oil pump lb is connected to the common rail pipe distributor 2 through the rolling oil pipe 9, and the oil return port of the high pressure oil pump lb is connected to the oil tank 19 through the fourth oil return pipe 18.
  • Both the oil pump la and the high pressure oil pump lb are driven by the same camshaft, which is driven by the crankshaft of the engine.
  • the high pressure oil pump lb is an inline pump with more than two plungers, the cam shaft has more than two cams, and each cam has three cam tips. Thus, the camshaft makes one revolution and each plunger pumps three times the pressurized fuel.
  • each cylinder of the high pressure oil pump lb has a solenoid valve to control the amount of oil.
  • the common rail pipe distributor 2 in the embodiment ⁇ is respectively provided with a rail pressure sensor and a pressure limiting valve member 17, and the pressure limiting valve member 17 is connected to the oil tank 19 through the third oil return pipe 16, when the rail pressure exceeds the limit At the time, the pressure limiting valve member 17 is opened under pressure, and the high pressure fuel is vented back to the tank through the third oil return pipe 16.
  • the oil pump la in the common rail pump 1 draws the fuel from the oil tank 19 to the high pressure oil pump lb, and is pressurized by the high pressure oil pump lb to become the rolling fuel, and the high pressure oil pump lb pumps the high pressure fuel to the total
  • the high-pressure fuel delivered from the common rail pump 1 is accumulated in the common rail distributor 2 through the high pressure oil pipe 9, and the high pressure fuel accumulated in the common rail distributor 2 is separately supplied to the first common rail 3 and the second total
  • the rail tube 4, the high-pressure fuel accumulated in the first common rail tube 3 is sent to the first injector 5 through the first high-pressure branch pipe 12, and the high-pressure fuel accumulated in the second common rail tube 4 is delivered through the second high-pressure branch pipe 13.
  • the second injector 6 is given. This ensures that the pressures in the first total tube 3 and the second common rail tube 4 are the same, so that the injection amounts of the first injector 5 and the second injector 6 are the same.
  • the electronically controlled rolling common rail fuel injection system of the second embodiment is also used for a V-type 12-cylinder diesel engine.
  • the difference from the first embodiment is that the first common rail 3 is mainly composed of the first front common rail 3a, the first rear common rail 3b and the first high pressure connecting oil pipe 20, and the first front common rail 3a passes the first
  • a high pressure main oil pipe 10 is connected to the common rail pipe distributor 2
  • the first rear common rail pipe 3b is connected to the first front common rail pipe 3a through the first high pressure connecting oil pipe 20
  • the second common rail pipe 4 is mainly composed of the second front common rail
  • the tube 4a, the second rear common rail tube 5b and the second high pressure connecting oil pipe 21 are formed, the second front common rail pipe 4a is connected to the common rail pipe distributor 2 through the second high pressure main oil pipe 11, and the second rear common rail pipe 4b is passed through
  • the second high pressure connecting oil pipe 21 is connected to the second front common rail pipe 4a.
  • the pressurized fuel from the common rail distributor 2 is respectively sent to the first front common rail 3a and the second front common rail 4a via the first high pressure main oil pipe 10 and the second high pressure main oil pipe 11 respectively.
  • the first high pressure connecting oil pipe 20 and the second high pressure connecting oil pipe 21 respectively supply the accumulated turbulent fuel oil to the first rear common rail pipe 3b and the second rear common rail pipe 4b; the first front common rail pipe 3a, the first The rear common rail 3b delivers the accumulated high-pressure fuel to the first injector 5 on each cylinder of the corresponding first cylinder bank, and the second front common rail 4a and the second rear common rail 4b accumulate high-pressure fuel It is sent to the second injector 6 on each cylinder in the corresponding second cylinder bank.

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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

V型柴油机用电控高压共轨燃油喷射系统，共轨泵（1）的进油口与油箱（19）连接，共轨泵（1）的出油口通过高压油管（9）与共轨管分配器（2）相连接，共轨管分配器（2）分别通过第一高压主油管（10）、第二高压主油管（11）与第一共轨管（3）、第二共轨管（4）连接；第一共轨管（3）安装在V型柴油机第一列缸的一侧，第一列缸中各缸上的第一喷油器（5）分别通过第一高压支油管（12）与第一共轨管（3）连接，第一喷油器（5）的回油口通过第一回油管（14）与油箱（19）连接；第二共轨管（4）安装在V型柴油机第二列缸的一侧，第二列缸中各缸上的第二喷油器（6）分别通过第二高压支油管（13）与第二共轨管（4）连接，所述第二喷油器（6）的回油口通过第二回油管（15）与油箱（19）连接。该V型柴油机降低排放、提高经济性、操作控制自动化、可靠性高。

Description

v型柴油机用电控高压共轨燃油喷射系统 技术领域
[0001] 本发明涉及一种燃油喷射系统，具体地说是一种适用于 V型柴油机的用于将燃油 输送'到内燃机中的电控髙压共轨燃油喷射系统。 背景技术
[0002] 随着国家对环保的日益重视，传统的采用机械式燃油喷射系统的柴油机己经不能 满足国家发展的需要。采用电控高压共轨燃油喷射系统的柴油机已经成为各发动机生产厂 家的研究方向。
[0003] 电控高压共轨燃油喷射系统的主要特点是共轨腔内的高压直接用于喷射,而且共 轨腔内是持续高压，高压油泵所需的驱动力矩比传统油泵小得多。 而且高压共轨燃油喷射 系统可以根据发动机负荷状况以及经济性和排放性的要求对共轨腔内的油压进行灵活调 节，尤其优化了发动机的低速性能。通过喷油器上的电磁阀控制喷射定时、喷射量以及喷速 率，还可以灵活调节不同工况下预喷射和后喷射的喷射油量以及主喷射的间隔。因此，电控 高压共轨燃油喷射系统得到了广泛的应用。 发明内容
[0004] 本发明的目的在于克服传统机械式燃油喷射系统存在的不足，提供一种 V型柴油 机用电控高压共轨燃油喷射系统。
[0005] 按照本发明提供的技术方案： V型柴油机用电控高压共轨燃油喷射系统，包括共 轨泵、共轨管分配器、第一共轨管、第二共轨管、第一喷油器、第二喷油器、电子控制单 ^和 各类传感器；所述共轨泵的进油口与油箱连接,共轨泵的出油口通过高压油管与共轨管分 配器相连接,共轨管分配器分别通过第一高压主油管、第二高压主油管与第一共轨管、第二 共轨管连接；所述第一共轨管安装在 V型柴油机第一列缸的一侧，所述第一列缸中各缸上 的第一喷油器分别通过第一高压支油管与第一共轨管连接，所述第一喷油器的回油口通过 第一回油管与油箱连接；所述第二共轨管安装在 V型柴油机第二列缸的一侧，所述第二列 缸中各缸上的第二喷油器分别通过第二高压支油管与第二共轨管连接，所述第二喷油器的 回油口通过第二回油管与油箱连接；所述电子控制单元用于采集各类传感器监测的发动机 及共轨燃油喷射系统的状态参数,通过内置的控制策略及数据 AP发出精确控制信号，以 驱动对应执行器进行动作，使供油量、轨压、喷油角度、喷油量和喷油器规律按需求反馈调 节；所述各类传感器包括曲轴转速传感器、凸轮转速传感器、轨压传感器、进气温度与压力 传感器、水温传感器、油温传感器。
[0006] 作为本发明的进一步改进，所述共轨管分配器两端分别装有轨压传感器和限压阀 部件，限压阀部件通过第三回油管与油箱连接，当轨压超过限值时，限压阀部件在压力下开 启，高压燃油通过第三回油管泄回到油箱。
[0007] 作为本发明的进一步改进,所述共轨泵主要由输油泵和高压油泵组成，输油泵装 在高压油泵一端,输油泵进油口通过油管与油箱连接，输油泵出油口通过油管与高压油泵 进油口连接,髙压油泵出油口通过高压油管与共轨管分配器连接，高压油泵回油口通过第 四回油管与油箱连接。
[0008] 本发明与现有技术相比,优点在于：釆用本发明电控高压共轨燃油喷射系统的 V 型柴油机降低排放、提髙经济性、操作控制自动化、可靠性高。 附图说明
[0009] 图 1为本发明实施例 1的结构图。
[0010] 图 2为本发明实施例 2的结构图。 具体实施方式
[0011] 下面结合具体附图和实施例对本发明作进一步说明。
[0012] 实施例 1
如图 1所示,实施例 1中的电控高压共轨燃油喷射系统用于 V型 12缸柴油机上。该电 控髙压共轨燃油喷射系统主要由共轨泵 1、共轨管分配器 2、第一共轨管 3、第二共轨管 4、第 一喷油器 5、第二喷油器 6、电子控制单元（ECU) 7、各类传感器 8、高压油管 9、第一高压主油 管 10、第二高压主油管 11、第二高压支油管 13、第 回油管 14、第二回油管 15、第三回油管 16、限压阀部件 17、第四回油管 18和油箱 19等零部件组成。
[0013] 如图 1所示，所述共轨泵 1的进油口与油箱 19连接，共轨泵 1的出油口通过高压 油管 9与共轨管分配器 2相连接,共轨管分配器 2分别通过第一高压主油管 10、第二高压主 油管 11与第一共轨管 3、第二共轨管 4连接；所述第一共轨管 3安装在 V型 12缸柴油机第 一列缸的一侧,所述第一列缸具有六个缸，各缸上的第一喷油器 5分别通过第一高压支油 管 12与第一共轨管 3连接,所述第一喷油器 5的回油口通过第^"回油管 14与油箱连接.；所 述第二共轨管 4安装在 V型 12缸柴油机第二列缸的一侧,所述第二列缸中也具有六 缸， 各缸上的第二喷油器 6分别通过第二高压支油管 13与第二共轨管 4连接,所述第二喷油 器 6的回油口通过第二回油管 15与油箱连接；所述电子控制单元（ECU) 7用于采集各类传 感器 8监测的发动机及共轨燃油喷射系统的状态参数，通过内置的控制策略及数据 MAP发 出精确控制信号，以驱动对应执行器进行动作，使供油量、轨压、喷油角度、喷油量和喷油器 规律按需求反馈调节；所述各类传感器 8包括曲轴转速传感器、凸轮转速传感器、轨压传感 器、进气温度与压力传感器、水温传感器、油温传感器等。
[0014] 实施例 1中的共轨泵 1主要由输油泵 la和高压油泵 lb组成，输油泵 la装在高压 油泵 lb—端,输油泵 la进油口通过油管与油箱 19连接，输油泵 la出油口通过油管与高压 油泵 lb进油口连接，高压油泵 lb出油口通过髙压油管 9与共轨管分配器 2连接,高压油泵 lb回油口通过第四回油管 18与油箱 19连接。所述输油泵 la和高压油泵 lb都由同一凸轮 轴驱动，凸轮轴由发动机的曲轴驱动。 高压油泵 lb是一个具有两个以上柱塞的直列泵，凸 轮轴有两个以上凸轮，每个凸轮有三个凸轮尖。 这样，凸轮轴转一圈，每个柱塞都泵送三次 加压燃油。 由油泵凸轮轴驱动，高压油泵 lb的每个缸都有一个电磁阀控制油量。
[0015] 实施例 ί中的共轨管分配器 2两端分别装有轨压传感器和限压阀部件 17，限压阀 部件 17通过第三回油管 16与油箱 19连接，当轨压超过限值时，限压阀部件 17在压力下开 启，高压燃油通过第三回油管 16泄回到油箱。 [0016] 具体应用时，共轨泵 1中的输油泵 la把燃油从油箱 19抽出输送给高压油泵 lb，经 高压油泵 lb加压后成为髙压燃油，高压油泵 lb将高压燃油泵送至共轨管分配器 2,泵送 >后 所剩余的燃油直接回到油箱 19。从共轨泵 1输送来的高压燃油通过高压油管 9被蓄积在共 轨管分配器 2中,共轨管分配器 2中蓄积的高压燃油被分别输送给第一共轨管 3和第二共 轨管 4，第一共轨管 3中蓄积的高压燃油通过第一高压支油管 12输送给第一喷油器 5，第二 共轨管 4中蓄积的高压燃油通过第二高压支油管 13输送给第二喷油器 6。这样可以保证第 一共¼管 3和第二共轨管 4中的压力相同，从而使第一喷油器 5和第二喷油器 6的喷射量 相同。
[0017] 实施例 2
如图 2所示,实施例 2中的电控髙压共轨燃油喷射系统同样也是用于 V型 12缸柴油机 上。 其与实施例 1的区别仅在于：第一共轨管 3主要由第一前共轨管 3a、第一后共轨管 3b 和第 高压连接油管 20组成,第一前共轨管 3a通过第一高压主油管 10与共轨管分配器 2 连接，第一后共轨管 3b通过第一高压连接油管 20与第一前共轨管 3a连接；第二共轨管 4 主要由第二前共轨管 4a、第二后共轨管 5b和第二高压连接油管 21组成，第二前共轨管 4a 通过第二高压主油管 11与共轨管分配器 2连接，第二后共轨管 4b通过第二高压连接油管 21与第二前共轨管 4a连接。
[0018] 这样,从共轨管分配器 2出来的髙压燃油经第一高压主油管 10、第二高压主油管 11分别输送给第一前共轨管 3a、第二前共轨管 4a,再经第一高压连接油管 20、第二高压连 接油管 21将蓄积的髙压燃油分别输送给第一后共轨管 3b、第二后共轨管 4b；第一前共轨管 3a、第一后共轨管 3b将蓄积的高压燃油输送给所对应的第一缸列中各缸上第一喷油器 5， 第二前共轨管 4a、第二后共轨管 4b将蓄积的高压燃油输送给所对应的第二缸列中各缸上 第二喷油器 6。
[0019] 实施例 2中的方案的优点在于，当第一共轨管 3、第二共轨管 4过长不易加工时,可 采用该方案，这样就降低了加工难度。

Claims

权 利 要 求
1. V型柴油机用电控高压共轨燃油喷射系统，包括共轨泵（1)、共轨莺分配器（2)、第 一共轨管（3)、第二共轨管（4)、第一喷油器（5)、第二喷油器（6)、电子控制单元（7)和各类 传感器（8) ;所述共轨泵（1 )的进油口与油箱（19)连接，共轨泵（1 )的出油口通过高压油管 (9)与共轨管分配器（2)相连接,共轨管分配器（2)分别通过第一高压主油管（10)、第二高 压主油管（11 )与第一共轨管（3)、第二共轨管（4)连接；所述第一共轨管（3)安装在 V型柴 油机第一列缸的一侧，所述第一列缸中各缸上的第一喷油器（5)分别通过第一高压支油管 ( 12)与第一共轨管（3)连接，所述第一喷油器（5)的回油口通过第一回油管（14)与油箱 ( 19)连接；所述第二共轨管（4)安装在 V型柴油机第二列缸的一侧,所述第二列缸中各缸上 的第二喷油器（6)分别通过第二高压支油管（13 )与第二共轨管（4)连接，所述第二喷油器 (6)的回油口通过第二回油管（15)与油箱连接；所述电子控制单元 (7)用于采集各类传感 器（8)监测的发动机及共轨燃油喷射系统的状态参数，通过内置的控制策略及数据 MAP发 出精确控制信号，以驱动对应执行器进行动作，使供油量、轨压、喷油角度、喷油量和喷油器 规律按需求反馈调节；所述各类传感器（8)包括曲轴转速传感器、凸轮转速传感器、轨压传 感器、进气温度与压力传感器、水温传感器、油温传感器。
2. 如权利要求 1所述的 V型柴油机用电控高压共轨燃油喷射系统，其特征在于：所述 共轨管分配器（2)两端分别装有轨压传感器和限压阀部件（17)，限压阀部件（17)通过第三 回油管（ 16)与油箱（ 19)连接，当轨压超过限值时,限压阀部件（ 17)在压力下幵启，高压燃 油通过第三回油管（16)泄回到油箱（19)。
3. 如权利要求 1所述的 V型柴油机用电控高压共轨燃油喷射系统，其特征在于：所述 共轨泵（1 )主要由输油泵（fa)和高压油泵（lb)组成，输油泵（la)装在高压油泵（lb) - 端,输油泵（la)进油口通过油管与油箱（19)连接，输油泵（la)出油口通过油管与高压油泵 ( lb)进油口连接，高压油泵（lb)出油口通过高压油管（9)与共轨管分配器（2)连接，高压 油泵（ lb)回油口通过第四回油管（ 18)与油箱（19)连接。
4. 如权利要求 1所述的 V型柴油机用电控高压共轨燃油喷射系统，其特征在于：所述 第一共轨管（3)包括第一前共轨管（3a)、第一后共轨管（3b)和第一高压连接油管（20),第 一前共轨管（3a)通过第一高压主油管（10)与共轨管分配器（2)连接，第一后共轨管（3b) 通过第一髙压连接油管（20)与第一前共轨管（3a)连接；所述第二共轨管（4)包括第二前共 轨管（4a)、第二后共轨管（5b)和第二高压连接油管（21)，第二前共轨管（4a)通过第二高压 主油管（11 )与共轨管分配器（2)连接，第二后共轨管（4b)通过第二髙压连接油管（21 )与 第二前共轨管 (4a)连接。
PCT/CN2013/000705 2012-06-27 2013-06-17 V型柴油机用电控高压共轨燃油喷射系统 WO2014000413A1 (zh)

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