WO2018149161A1 - 一种电控共轨发动机快速启动方法 - Google Patents

一种电控共轨发动机快速启动方法 Download PDF

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WO2018149161A1
WO2018149161A1 PCT/CN2017/106274 CN2017106274W WO2018149161A1 WO 2018149161 A1 WO2018149161 A1 WO 2018149161A1 CN 2017106274 W CN2017106274 W CN 2017106274W WO 2018149161 A1 WO2018149161 A1 WO 2018149161A1
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Prior art keywords
common rail
oil
rail engine
controlled common
fine filter
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PCT/CN2017/106274
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English (en)
French (fr)
Inventor
谭贵荣
莫宗华
胡国强
孙步武
周健
陈俊红
赵增亮
李欢
曹杨军
王雪光
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广西玉柴机器股份有限公司
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Application filed by 广西玉柴机器股份有限公司 filed Critical 广西玉柴机器股份有限公司
Priority to EP17896751.9A priority Critical patent/EP3550137A4/en
Priority to US16/468,674 priority patent/US20200095965A1/en
Publication of WO2018149161A1 publication Critical patent/WO2018149161A1/zh

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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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/54—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by air purging means
    • 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
    • F02M55/007—Venting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/001—Arrangements thereof
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N2019/002—Aiding engine start by acting on fuel

Definitions

  • the invention relates to the field of engines, and in particular to a method for quickly starting an electronically controlled common rail engine.
  • the fuel system is an important factor affecting its starting performance.
  • the existing common rail system mainly improves the starting performance of the engine by optimizing the system components and optimizing the layout of the whole machine.
  • these methods cannot completely solve the problem of long starting time or failure to start; on some engines, by adding The installation of an electronic oil pump to speed up the exhaust of the oil circuit can achieve the purpose of speeding up the start-up and increase the cost of the whole machine.
  • the object of the present invention is to provide a method for quickly starting an electronically controlled common rail engine, which can effectively improve the starting performance of the engine.
  • a quick start method for an electronically controlled common rail engine is provided, which is to provide an exhaust device between an oil delivery port of an electronically controlled common rail engine and an oil inlet of a fuel injection pump, and to provide an exhaust device
  • the outlet is connected to the fuel tank through a pipeline to remove the gas present in the fuel during normal operation of the system.
  • the outlet aperture of the exhaust device is initially determined according to the following formula and is determined by trial verification:
  • V is the volume of the fine filter
  • a is the outlet cross-sectional area of the exhaust
  • v is the flow rate of the fuel
  • d is the diameter of the outlet of the exhaust.
  • the venting means is disposed at the oil inlet end of the fine filter.
  • the exhaust device is an exhaust orifice.
  • the pores of the exhaust gas have a pore diameter of 0.2 mm to 3 mm. .
  • the invention has the beneficial effects of:
  • the invention provides an active exhaust by effectively providing an exhaust device by providing an exhaust device at the oil inlet end of the fine filter to effectively exhaust the air through the exhaust device, thereby effectively improving the starting performance of the engine.
  • the invention has the advantages of ingenious structure, high reliability, and no need for an additional control system, thereby effectively reducing the cost; the invention can significantly speed up the starting speed of the engine compared with the electronic fuel pump without the electronic fuel pump.
  • Figure 1 is a block diagram showing the structure of the present invention
  • Figure 2 is a schematic view of the structure of the present invention.
  • FIG. 3 is a schematic structural view of an exhaust device according to the present invention.
  • Figure 4 is a schematic view showing the structural relationship between the fine filter and the exhaust device of the present invention.
  • the present invention provides a quick start method for an electronically controlled common rail engine, which is provided with an exhaust device between an oil outlet of an oil pump 3 of an electronically controlled common rail engine and an oil inlet of the fuel injection pump 5 . 6.
  • the outlet of the venting device 6 is in communication with the fuel tank 1 through a line to exclude gases present in the oil during normal operation of the system.
  • the outlet aperture of the exhaust device 6 is initially determined according to the following formula and is verified by experiments:
  • P is the internal pressure of the fine filter 4
  • V is the volume of the fine filter 4
  • a is the outlet cross-sectional area of the exhaust device 6
  • v is the flow rate of the fuel
  • d is the diameter of the outlet of the exhaust device 6.
  • the experimental data before the installation of the venting device 6 is preset according to the above formula, and the aperture of the vent hole 62 is preset, and then measured by the experiment after the venting device 6 is installed.
  • Each experimental data verifies the aperture of the vent hole 62 according to the above formula, so that the exhaust device 6 can ensure sufficient exhaust capability and avoid excessive fuel flowing back to the tank 1 through the vent hole, thereby not affecting the normal operation of the engine.
  • the exhaust device 6 is disposed at the oil inlet port 41 of the fine filter 4, and after the engine is started, when air enters the fine filter 4, it is discharged back to the oil tank 1 through the exhaust device 6 and the oil pipe 7. At the same time, through the reasonable control of the aperture of the small hole, the air in the fine filter 4 can be discharged without affecting the operation of the engine.
  • the method of the invention can obviously and effectively shorten the starting time of the electronically controlled common rail engine, and can effectively improve the starting performance of the engine.
  • the present invention also provides an electric control common rail engine quick start system, comprising a fuel tank 1, a prefilter 2, an oil pump 3, a fine filter 4, a fuel injection pump 5, and the oil tank 1 passes through the oil pipe 7
  • an exhaust device 6 for removing oil gas is disposed between the oil pump 3 and the fine filter 4, and an outlet of the exhaust device 6 communicates with the oil tank 1 through a fuel pipe.
  • the oil inlet 41 end of the fine filter 4 is provided with a fixing seat 42, and the exhaust device 6 is fixed to the fine filter 4 through the fixing seat 42.
  • the venting device 6 is an oil-filled bolt with a venting orifice.
  • the exhaust device 6 includes a casing 61, a casing inlet 63 provided at one end of the casing 61, and a vent hole 62 provided at a side of the casing 61.
  • the casing inlet 63 is connected to the fixing seat 42, and the vent hole 62 passes through the oil pipe and The oil tank 1 is in communication, and the vent hole 62 has a hole diameter of 0.5 mm.
  • the exhaust device 6 and the fixing base 42 are screwed to fix the exhaust device 6 to the fine filter 4, which can effectively avoid the influence of the vibration of the engine during normal operation on the exhaust device 6.
  • the normal service life and stable working performance of the exhaust unit 6 are improved.
  • the diameter of the vent hole 62 may also be 0.2 mm or 0.7 mm or 1 mm or 1.5 mm or 2 mm or 3 mm.
  • the working process of the embodiment after the engine starts working, the fuel of the oil tank 1 passes through the pre-filter 2, the oil pump 3, the fine filter 4 to the fuel injection pump 5 to inject oil through the oil pipe 7, and when the fine filter 4 has air, it will pass through the row.
  • the gas device 6 and the oil pipe 1 are drained back to the oil tank; at the same time, by properly controlling the small hole diameter, the air in the fine filter 4 is discharged without affecting the operation of the engine. Thereby shortening the time of the next start of the engine and achieving the purpose of smooth start.

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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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

一种电控共轨发动机快速启动方法，该方法是在电控共轨发动机的输油泵（3）出油口到喷油泵（5）进油口之间设置排气装置（6），并将排气装置（6）的出口通过管路与油箱（1）连通，以在系统正常工作时排除燃料中存在的气体。该方法通过在精滤器（4）的进油口（41）设置排气装置（6），使精滤器（4）中的空气通过排气装置（6）排出，从而实现主动排气，可有效的提高发动机的启动性能。

Description

一种电控共轨发动机快速启动方法 技术领域
本发明涉及发动机领域，尤其涉及一种电控共轨发动机快速启动方法。
背景技术
在现有电控共轨发动机中，燃油系统是影响其启动性能的重要因素。目前，现有共轨系统主要是通过优化系统零部件、优化整机布置设计来提升发动机的启动性能，但这些方法不能彻底的解决启动时间长或无法启动的问题；在一些发动机上，通过加装电子输油泵来加快油路排气可以达到加快启动目的，又会增加整机成本。同时，在现有的技术中并未意识到输油泵至喷油泵段存在气体对启动性能的影响。
发明内容
本发明的目的是，提供一种电控共轨发动机快速启动方法，可有效的提高发动机的启动性能。
为实现该目的，提供一种电控共轨发动机快速启动方法，该方法是在电控共轨发动机的输油泵出油口到喷油泵进油口之间设置排气装置，并将排气装置的出口通过管路与油箱连通，以在系统正常工作时排除油料中存在的气体。
优选地，所述排气装置的出口孔径根据下述公式初步确定并且经试验验证后确定：
Figure PCTCN2017106274-appb-000001
其中，P为精滤器的内压力，V为精滤器的容积，a为排气装置的出口横截面积，v为燃油的流速，d为排气装置的出口的孔径。
优选地，所述排气装置设置在精滤器的进油口端。
优选地，所述排气装置为一个排气小孔。
优选地，所述排气小孔的孔径为0.2mm～3mm。。
本发明与现有技术相比，其有益效果在于：
本发明通过在精滤器的进油口端设置排气装置，使精滤中的空气通过排气装置排出，从而实现主动排气，可有效的提高发动机的启动性能。本发明与增加电子输油泵方案相比，结构巧妙、可靠性高，并且无需额外的控制系统，有效的降低成本；本发明与不带电子输油泵方案相比，可明显加快发动机的启动速度。
附图说明
图1为本发明的结构框图；
图2为本发明的结构示意图；
图3为本发明中排气装置的结构示意图；
图4为本发明中精滤器和排气装置的结构关系示意图。
具体实施方式
下面结合实施例，对本发明作进一步的描述，但不构成对本发明的任何限制，任何在本发明权利要求范围所做的有限次的修改，仍在本发明的权利要求 范围内。
如图1所示，本发明提供了一种电控共轨发动机快速启动方法，该方法是在电控共轨发动机的输油泵3出油口到喷油泵5进油口之间设置排气装置6，并将排气装置6的出口通过管路与油箱1连通，以在系统正常工作时排除油料中存在的气体。
如图3、图4所示，所述排气装置6的出口孔径根据下述公式初步确定并且经试验验证后确定：
Figure PCTCN2017106274-appb-000002
其中，P为精滤器4的内压力，V为精滤器4的容积，a为排气装置6的出口横截面积，v为燃油的流速，d为排气装置6的出口的孔径。
在本实施例中，在排气孔62的孔径计算时，通过排气装置6安装前的实验数据根据上述公式预设排气孔62的孔径，再通过安装排气装置6后的实验测量的各实验数据根据上述公式校核排气孔62的孔径，使排气装置6能保证足够的排气能力并且避免通过排气孔流回油箱1的燃油过多，从而不影响发动机的正常工作。
如图4所示，排气装置6设置在精滤器4的进油口41端，启动发动机工作后，当有空气进入精滤器4内时，会通过排气装置6与油管7排回油箱1；同时通过对小孔孔径的合理控制，能够实现排出精滤器4内空气的同时又不影响发动机的运行。
通过本发明的方法可有明显、有效的缩短电控共轨发动机的启动时间，可有效的提高发动机的启动性能。
如图2至图4所示，本发明还提供了一种电控共轨发动机快速启动系统，包括油箱1、预滤器2、输油泵3、精滤器4、喷油泵5，油箱1通过油管7依次与预滤器2、输油泵3、精滤器4、喷油泵5连接，喷油泵5的回油口又通过油管7与油箱1 连接，输油泵3与精滤器4之间设有排除油料气体的排气装置6，该排气装置6的出口通过油管与油箱1连通。精滤器4的进油口41端设置有固定座42，排气装置6通过固定座42固定于精滤器4上。
排气装置6为一个带排气小孔的过油螺栓。排气装置6包括壳体61、设于壳体61一端的壳体入口63、设于壳体61侧面的排气孔62，壳体入口63与固定座42连接，排气孔62通过油管与油箱1连通，该排气孔62的孔径为0.5mm。
在本实施例中，排气装置6与固定座42之间通过螺纹拧紧，使排气装置6固定于精滤器4上，可以有效的避免发动机正常工作时的振动对排气装置6的影响，提高排气装置6的正常使用寿命和稳定的工作性能。
此外，排气孔62的孔径也可为0.2mm或0.7mm或1mm或1.5mm或2mm或3mm。
本实施例的工作过程：在发动机启动工作后，油箱1的燃油经油管7依次通过预滤2、输油泵3、精滤器4到喷油泵5进行喷油，当精滤器4有空气会通过排气装置6与油管1排回油箱；同时通过对小孔孔径的合理控制，实现排出精滤器4内空气的同时又不影响发动机的运行。从而缩短发动机下次启动的时间并且达到顺利启动的目的。
本发明与现有电控共轨发动机启动系统的效果对比，如表1，
表1
Figure PCTCN2017106274-appb-000003
通过表1可以看出，本发明的启动时间比现有电控共轨发动机的启动时间有明显、有效的缩短，可有效的提高发动机的启动性能。
以上仅是本发明的优选实施方式，应当指出对于本领域的技术人员来说，在不脱离本发明结构的前提下，还可以作出若干变形和改进，这些都不会影响发明实施的效果和专利的实用性。

Claims (5)

  1. 一种电控共轨发动机快速启动方法，其特征在于，该方法是在电控共轨发动机的输油泵出油口到喷油泵进油口之间设置排气装置，并将排气装置的出口通过管路与油箱连通，以在系统正常工作时排除油料中存在的气体。
  2. 根据权利要求1所述的一种电控共轨发动机快速启动方法，其特征在于：所述排气装置的出口孔径根据下述公式初步确定并且经试验验证后确定：
    Figure PCTCN2017106274-appb-100001
    其中，P为精滤器的内压力，V为精滤器的容积，a为排气装置的出口横截面积，v为燃油的流速，d为排气装置的出口的孔径。
  3. 根据权利要求1所述的一种电控共轨发动机快速启动方法，其特征在于：所述排气装置设置在精滤器的进油口端。
  4. 根据权利要求1所述的一种电控共轨发动机快速启动方法，其特征在于：所述排气装置为一个排气小孔。
  5. 根据权利要求4所述的一种电控共轨发动机快速启动方法，其特征在于：所述排气孔的孔径为0.2mm～3mm。
PCT/CN2017/106274 2017-02-17 2017-10-23 一种电控共轨发动机快速启动方法 WO2018149161A1 (zh)

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EP17896751.9A EP3550137A4 (en) 2017-02-17 2017-10-23 FAST ACTIVATION METHOD USED IN AN ELECTRICALLY CONTROLLED COMMON RAIL ENGINE
US16/468,674 US20200095965A1 (en) 2017-02-17 2017-10-23 Rapid activation method of electrically controlled common rail engine

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CN201710088317.9A CN106837642A (zh) 2017-02-17 2017-02-17 一种电控共轨发动机快速启动方法
CN201710088317.9 2017-02-17

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CN107061082A (zh) * 2017-02-17 2017-08-18 广西玉柴机器股份有限公司 电控共轨发动机无忧启动系统
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