KR100270049B1 - Fuel return system - Google Patents

Fuel return system Download PDF

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Publication number
KR100270049B1
KR100270049B1 KR1019970052574A KR19970052574A KR100270049B1 KR 100270049 B1 KR100270049 B1 KR 100270049B1 KR 1019970052574 A KR1019970052574 A KR 1019970052574A KR 19970052574 A KR19970052574 A KR 19970052574A KR 100270049 B1 KR100270049 B1 KR 100270049B1
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South Korea
Prior art keywords
fuel
pipe
engine
fuel tank
tank
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KR1019970052574A
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Korean (ko)
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KR19990031742A (en
Inventor
권혁용
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정몽규
현대자동차주식회사
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Priority to KR1019970052574A priority Critical patent/KR100270049B1/en
Publication of KR19990031742A publication Critical patent/KR19990031742A/en
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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
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • 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
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • 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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0043—Two-way valves
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves

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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

PURPOSE: A fuel recycling system is provided to improve performance of an engine and fuel efficiency, and to prevent a fuel tank from being expanded with cooling by two fuel tanks, and with ECU(Electronic Control Unit) control of two-way and three-way valves and a fuel pump. CONSTITUTION: A fuel recycle device comprises first and second fuel tanks(21,22) storing fuel; a supply pipe(29) feeding fuel from the first fuel tank to an engine(32); a first recycle pipe(30) supplying fuel remaining after supplying the engine to the second fuel tank through a delivery pipe(31); a direct pipe(34) diverging from the first recycle pipe and connecting the supply pipe; a second recycle pipe(35) recycling fuel from the first recycle pipe to the second fuel tank; a cooling pipe(36) supplying cool air from the second fuel tank to the supply pipe; a three-way valve(27) distributing fuel to the direct pipe and the second recycle pipe; a first two-way valve(25) recycling fuel from the direct pipe to the supply pipe; a second two-way valve(26) recycling fuel from the cooling pipe to the supply pipe; and an ECU(28) controlling first and second two-way valves, and the three-way valve. First and second fuel tanks consist of a first fuel pump(23) supplying fuel to the engine in the first fuel tank, a second fuel pump(24) supplying cool fuel to the engine in the second fuel tank, and the ECU controlling first and second fuel pumps.

Description

연료 재공급 장치Fuel resupply unit

본 발명은 연료 재공급 장치에 관한 것으로서, 보다 상세하게는 엔진에서 사용하고 남은 반송연료를 두 개의 연료탱크와 이방밸브 및 삼방밸브를 사용하여 엔진에 재공급하는 연료 재공급 장치에 관한 것이다.The present invention relates to a fuel resupply apparatus, and more particularly, to a fuel resupply apparatus for resupplying the remaining fuel used in an engine to two engines using two fuel tanks, an anisotropic valve, and a three-way valve.

일반적으로 엔진을 구동하기 위해서는 연료는 필수적이며 연료는 온도와 압력에 따라 연료의 비중과 밀도가 달라짐으로 연료의 공급원인 연료탱크에서부터 연소실에서 연료가 사용되기 까지의 그 일련의 과정은 엔진의 성능, 특히 출력이나 연료의 경제성을 좌우하는 중요한 장치이다.In general, fuel is essential for driving an engine, and the specific gravity and density of the fuel varies with temperature and pressure, so the series of processes from the fuel tank, which is the source of fuel, to the use of the fuel in the combustion chamber, is based on engine performance, In particular, it is an important device that influences the output and fuel economy.

상기의 그 일련의 과정을 연료장치라고 하며 즉, 연료장치는 모든 운전조건하에서 엔진에 필요한 공기와 연료의 혼합상태를 가장 연소하기 쉬운 상태로 공급하는 장치이며, 연료장치의 구성 및 개발은 중요한 과제이다.The series of processes described above is called a fuel device, that is, a fuel device is a device that supplies a mixture of air and fuel required for an engine under the most operating conditions to the most combustible state, and the construction and development of the fuel device are important tasks. to be.

종래 기술의 연료장치를 도 1에 나타낸 바와 같이 구성 및 작용을 설명하면 다음과 같다.Referring to the configuration and operation of the fuel device of the prior art as shown in Figure 1 as follows.

연료를 저장하는 연료탱크(11)와, 상기 연료탱크(11)의 내부에는 저장된 연료를 압송하여 엔진으로 공급하는 기능을 가진 연료펌프(12)와, 상기 연료탱크(11)로부터 압송된 연료는 공급관(13)을 따라 엔진으로 공급되고, 분배관(14)을 따라 각 실린더별로 적절하게 연료가 공급되고, 공급되고 남은 연료는 압력조절기(17)와, 반송관(15)를 거쳐서 상기 연료탱크(11)로 다시 모이게 된다.A fuel tank 11 for storing fuel, a fuel pump 12 having a function of supplying the stored fuel to the engine by feeding the stored fuel into the fuel tank 11, and the fuel pumped from the fuel tank 11 The fuel is supplied to the engine along the supply pipe 13, the fuel is properly supplied to each cylinder along the distribution pipe 14, and the remaining fuel is supplied to the fuel tank via a pressure regulator 17 and a transport pipe 15. It is gathered again at (11).

그러나, 상기의 연료장치는 엔진의 고속, 고부하에서는 엔진주변의 열과 온도에 의해서 연료의 온도가 상승되어 최적의 연소조건이 되지 않아 엔진의 성능이 저하되고, 연료의 과다한 소모 및 연료탱크의 팽창 등 많은 문제점이 있었다.However, in the above fuel device, at high speed and high load of the engine, the temperature of the fuel is increased by the heat and temperature around the engine, which is not an optimal combustion condition. Therefore, the performance of the engine is reduced, excessive consumption of fuel, expansion of the fuel tank, etc. There were many problems.

본 발명은 상기한 문제점을 해결하기 위해 안출된 것으로서, 두 개의 연료탱크를 사용한 냉각기능과, 이방밸브 및 삼방밸브와 연료펌프에 ECU의 제어기능을 추가하여 엔진의 성능과 연비를 향상시키고, 연료탱크의 팽창을 방지할 수 있는 연료 재공급 장치를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, by adding a cooling function using two fuel tanks, the control of the ECU in the two-way valve, three-way valve and the fuel pump to improve the performance and fuel economy of the engine, fuel It is an object of the present invention to provide a fuel resupply apparatus capable of preventing expansion of a tank.

도 1은 종래 기술의 연료 재공급 장치에 관한 도식도1 is a schematic diagram of a fuel resupply device of the prior art.

도 2는 본 발명의 연료 재공급 장치에 관한 도식도이다.2 is a schematic view of a fuel resupply device of the present invention.

＜도면의 주요 부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

21 : 제 1 연료탱크 22 : 제 2 연료탱크21: first fuel tank 22: second fuel tank

23 : 제 1 연료펌프 24 : 제 2 연료펌프23: first fuel pump 24: second fuel pump

25 : 제 1 이방밸브 26 : 제 2 이방밸브25: first anisotropic valve 26: second anisotropic valve

27 : 삼방밸브 28 : ECU27: three-way valve 28: ECU

13, 29 : 공급관 15, 30 : 반송관13, 29: supply pipe 15, 30: return pipe

14, 31 : 분배(DELIVERY)관 32 : 엔진14, 31: DELIVERY pipe 32: engine

17, 33 : 압력조절기 34 : 직송관17, 33: pressure regulator 34: direct delivery pipe

35 : 제 2 반송관 36 : 냉각관35 second conveying tube 36 cooling tube

상기한 과제를 실현하기 위한 본 발명의 연료 재공급 장치는 연료가 저장된 제 1 연료탱크 및 제 2 연료탱크와; 상기 제 1 연료탱크에서 송출된 연료를 엔진으로 공급하는 공급관과; 엔진에 공급되고 남은 연료는 분배관을 거쳐 제 2 연료탱크로 반송되는 제 1 반송관과; 제 1 반송관에서 분기되어 상기 공급관으로 바로 공급되는 직송관과; 상기 제 1 반송관에서 제 2 연료탱크로 반송하는 제 2 반송관과; 상기 제 2 연료탱크에서 송출된 냉각된 연료를 공급관으로 공급하는 냉각관과; 상기 직송관 및 제 2 반송관으로 연료를 분기하는 삼방밸브와; 직송관의 연료를 공급관으로 재공급하는 제 1 이방밸브와; 상기 냉각관의 연료를 공급관으로 재공급하는 제 2 이방밸브와; 상기 제 1 이방밸브 제 2 이방밸브 및 삼방밸브를 제어하는 ECU로 구성된 것을 특징으로 한다.A fuel resupply device of the present invention for realizing the above object comprises a first fuel tank and a second fuel tank in which fuel is stored; A supply pipe for supplying fuel discharged from the first fuel tank to the engine; A first conveying pipe which is supplied to the engine and is left with the remaining fuel to the second fuel tank via a distribution pipe; A direct delivery pipe branched from the first conveying pipe and directly supplied to the supply pipe; A second conveying tube conveying from said first conveying tube to a second fuel tank; A cooling tube for supplying the cooled fuel sent out from the second fuel tank to a supply pipe; A three-way valve for branching fuel to the direct pipe and the second carrier pipe; A first anisotropic valve for resupplying the fuel of the direct delivery pipe to the supply pipe; A second anisotropic valve for resupplying the fuel of the cooling pipe to the supply pipe; The first anisotropic valve is characterized by consisting of the ECU for controlling the second anisotropic valve and the three-way valve.

이하, 첨부된 도면을 참조하여 본 발명의 구성 및 실시 예를 설명하면 다음과 같다.Hereinafter, a configuration and an embodiment of the present invention will be described with reference to the accompanying drawings.

본 발명에 의한 연료 재공급 장치는 도 2에 나타낸 바와 같이 연료가 저장된 제 1 연료탱크(21) 및 제 2 연료탱크(22)와; 상기 제 1 연료탱크(21)에서 송출된 연료를 엔진(32)으로 공급하는 공급관(29)과; 엔진(32)에 공급되고 남은 연료는 분배관(31)을 거쳐 제 2 연료탱크(22)로 반송되는 제 1 반송관(30)과; 제 1 반송관(30)에서 분기되어 상기 공급관(29)으로 바로 공급되는 직송관(34)과; 상기 제 1 반송관(30)에서 제 2 연료탱크(22)로 반송하는 제 2 반송관(35)과; 상기 제 2 연료탱크(22)에서 송출된 냉각된 연료를 공급관(29)으로 공급하는 냉각관(36)과; 상기 직송관(34) 및 제 2 반송관(35)으로 연료를 분기하는 삼방밸브(27)와; 직송관(34)의 연료를 공급관(29)으로 재공급하는 제 1 이방밸브(25)와; 상기 냉각관(36)의 연료를 공급관(29)으로 재공급하는 제 2 이방밸브(26)와; 상기 제 1 이방밸브(25), 제 2 이방밸브(26) 및 삼방밸브(27)를 제어하는 ECU(28)로 구성되어 있다.The fuel resupply device according to the present invention includes a first fuel tank 21 and a second fuel tank 22 in which fuel is stored, as shown in FIG. 2; A supply pipe (29) for supplying the fuel sent from the first fuel tank (21) to the engine (32); The fuel remaining after being supplied to the engine 32 is conveyed to the second fuel tank 22 via the distribution pipe 31; A direct delivery pipe 34 branched from the first conveying pipe 30 and directly supplied to the supply pipe 29; A second conveying pipe (35) for conveying from the first conveying pipe (30) to the second fuel tank (22); A cooling pipe 36 for supplying the cooled fuel sent from the second fuel tank 22 to the supply pipe 29; A three-way valve 27 for branching fuel to the direct delivery pipe 34 and the second transfer pipe 35; A first anisotropic valve 25 for resupplying the fuel of the direct delivery pipe 34 to the supply pipe 29; A second anisotropic valve 26 for resupplying the fuel of the cooling pipe 36 to the supply pipe 29; It consists of the ECU 28 which controls the said 1st anisotropic valve 25, the 2nd anisotropic valve 26, and the three way valve 27. As shown in FIG.

또한, 상기 제 1 및 제 2 연료탱크(21,22)는 제 1 연료탱크(21)에 내장되어 연료를 엔진(32)으로 송출시키는 제 1 연료펌프(23)와, 제 2 연료탱크(22)에 내장되어 냉각된 연료를 엔진(32)으로 송출시키는 제 2 연료펌프(24)와, 상기 제 1 연료펌프(23) 및 제 2 연료펌프(24)를 제어하는 ECU(28)로 구성되어 있다.In addition, the first and second fuel tanks 21 and 22 may be embedded in the first fuel tank 21 and may include a first fuel pump 23 and a second fuel tank 22 for delivering fuel to the engine 32. And a second fuel pump 24 for delivering the cooled fuel to the engine 32 and an ECU 28 for controlling the first fuel pump 23 and the second fuel pump 24. have.

상기와 같이 구성되는 본 발명에 따른 연료 재공급 장치의 작용을 도 2에 나타낸 바와 같이 설명하면 다음과 같다.Referring to the operation of the fuel re-supply device according to the present invention configured as described above as shown in Figure 2 as follows.

먼저, 엔진(32)이 구동하면 제 1 연료탱크(21)에 저장된 연료는 제 1 연료펌프(23)에 의해서 연료가 송압되어 공급관(29)과 분배관(31)을 통하여 각 실린더로 연료가 공급된다. 각 실린더로 연료가 공급되고 남은 연료는 연료조절기(33)와 반송관(30)을 따라 전송되어 1차적으로 삼방밸브(27)를 거쳐 제 1 이방밸브(25)를 통하여 다시 상기 분배관(31)으로 전송되어 각 실린더로 연료가 공급된다.First, when the engine 32 is driven, fuel stored in the first fuel tank 21 is pumped by the first fuel pump 23 to supply fuel to each cylinder through the supply pipe 29 and the distribution pipe 31. Supplied. Fuel is supplied to each cylinder and the remaining fuel is transferred along the fuel regulator 33 and the conveying pipe 30, and primarily through the three-way valve 27 and the first anisotropic valve 25 again to the distribution pipe 31. And fueled to each cylinder.

이때, 제 1 연료펌프(23)는 가변(VARIABLE)펌프로 제작되었기 때문에 상기 반송관(30)으로부터 전송되고 남은 연료는 연료압력에 맞도록 적절하게 구동이 되어 필요한 만큼 엔진으로 공급하고, 그래도 남은 연료는 상기 제 1 연료탱크(21)로 가는 것이 아니라, 제 2 연료탱크(22)로 보내어 진다.At this time, since the first fuel pump 23 is manufactured as a variable pump, the remaining fuel transferred from the conveying pipe 30 is properly driven to match the fuel pressure and supplied to the engine as needed, and the remaining fuel The fuel does not go to the first fuel tank 21 but is sent to the second fuel tank 22.

상기 제 2 연료탱크(22)는 스틸(STEEL)로 되어 있으므로 높은 온도의 반송 연료를 냉각시키는 기능을 수행하여 연료가 온도에 의해서 탱크내에서 팽창하는 요소를 제거하게 된다. 냉각된 연료는 다시 제 2 연료펌프(24)에 의해서 송압되어 제 2 이방밸브(26)와, 제 1 이방밸브(25)를 거쳐서 다시 상기 분배관(31)으로 전송되어 각 실린더로 연료가 공급되는 장치이다.Since the second fuel tank 22 is made of steel, the second fuel tank 22 performs a function of cooling a high temperature conveying fuel to remove an element in which the fuel expands in the tank due to the temperature. The cooled fuel is again pumped by the second fuel pump 24 and transferred to the distribution pipe 31 through the second anisotropic valve 26 and the first anisotropic valve 25 to supply fuel to each cylinder. Device.

또한, 상기 제 1 이방밸브(25)와 제 2 이방밸브(26)와, 삼방밸브(27)와, 제 1 연료펌프(23)와, 제 2 연료펌프(24)는 연료압력에 따라 ECU(28)에 의해서 제어를 받기 때문에 연료탱크 내의 연료팽창을 막게 되고, 불필요한 연료소모를 감소시키게 된다.The first anisotropic valve 25, the second anisotropic valve 26, the three-way valve 27, the first fuel pump 23, and the second fuel pump 24 may be ECUs according to fuel pressure. Controlled by 28) prevents fuel expansion in the fuel tank and reduces unnecessary fuel consumption.

상기와 같이 구성되고 작용하는 본 발명에 의한 연료 재공급 장치는 두 개의 연료탱크를 사용한 냉각기능과, 이방밸브 및 삼방밸브와 연료펌프에 ECU의 제어기능을 추가함으로써, 연료탱크내의 온도상승과 팽창을 막고, 아울러 연료소모량을 줄이고 엔진의 성능을 향상시키는 효과를 얻을 수 있다.The fuel resupply device according to the present invention constructed and acting as described above has a cooling function using two fuel tanks, and a temperature rise and expansion in the fuel tank by adding an ECU control function to the two-way valve, the three-way valve and the fuel pump. To reduce fuel consumption and improve engine performance.

Claims (3)

연료가 저장된 제 1 연료탱크 및 제 2 연료탱크와; 상기 제 1 연료탱크에서 송출된 연료를 엔진으로 공급하는 공급관과; 엔진에 공급되고 남은 연료는 분배관을 거쳐 제 2 연료탱크로 반송되는 제 1 반송관과; 제 1 반송관에서 분기되어 상기 공급관으로 바로 공급되는 직송관과; 상기 제 1 반송관에서 제 2 연료탱크로 반송하는 제 2 반송관과; 상기 제 2 연료탱크에서 송출된 냉각된 연료를 공급관으로 공급하는 냉각관과; 상기 직송관 및 제 2 반송관으로 연료를 분기하는 삼방밸브와; 직송관의 연료를 공급관으로 재공급하는 제 1 이방밸브와; 상기 냉각관의 연료를 공급관으로 재공급하는 제 2 이방밸브와; 상기 제 1 이방밸브 제 2 이방밸브 및 삼방밸브를 제어하는 ECU로 구성된 것을 특징으로 하는 연료 재공급 장치.A first fuel tank and a second fuel tank in which fuel is stored; A supply pipe for supplying fuel discharged from the first fuel tank to the engine; A first conveying pipe which is supplied to the engine and is left with the remaining fuel to the second fuel tank via a distribution pipe; A direct delivery pipe branched from the first conveying pipe and directly supplied to the supply pipe; A second conveying tube conveying from said first conveying tube to a second fuel tank; A cooling tube for supplying the cooled fuel sent out from the second fuel tank to a supply pipe; A three-way valve for branching fuel to the direct pipe and the second carrier pipe; A first anisotropic valve for resupplying the fuel of the direct pipe to the supply pipe; A second anisotropic valve for resupplying the fuel of the cooling pipe to the supply pipe; And a ECU for controlling the first two-way valve and the three-way valve. 제 1 항에 있어서,The method of claim 1, 상기 제 1 연료탱크에 내장되어 연료를 엔진으로 송출시키는 제 1 연료펌프와, 상기 제 1 연료펌프를 제어하는 ECU로 구성된 것을 특징으로 하는 연료 재공급 장치.And a first fuel pump embedded in the first fuel tank for delivering fuel to the engine, and an ECU for controlling the first fuel pump. 제 1 항에 있어서,The method of claim 1, 상기 제 2 연료탱크에 내장되어 냉각된 연료를 엔진으로 송출시키는 제 2 연료펌프와, 상기 제 2 연료펌프를 제어하는 ECU로 구성된 것을 특징으로 하는 연료 재공급 장치.And a second fuel pump configured to deliver fuel cooled in the second fuel tank to the engine, and an ECU controlling the second fuel pump.
KR1019970052574A 1997-10-14 1997-10-14 Fuel return system KR100270049B1 (en)

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Publication number Priority date Publication date Assignee Title
CN103835845A (en) * 2012-11-22 2014-06-04 沈家企业股份有限公司 Fuel oil supply device and oil return three-way pipe therein

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KR101431848B1 (en) * 2009-12-30 2014-08-25 현대중공업 주식회사 Recycling fuel oil system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103835845A (en) * 2012-11-22 2014-06-04 沈家企业股份有限公司 Fuel oil supply device and oil return three-way pipe therein

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