WO2001038718A1 - Vanne de retour de carburant a purge d'air - Google Patents

Vanne de retour de carburant a purge d'air Download PDF

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Publication number
WO2001038718A1
WO2001038718A1 PCT/US2000/028787 US0028787W WO0138718A1 WO 2001038718 A1 WO2001038718 A1 WO 2001038718A1 US 0028787 W US0028787 W US 0028787W WO 0138718 A1 WO0138718 A1 WO 0138718A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel
passage
air
recirculation
Prior art date
Application number
PCT/US2000/028787
Other languages
English (en)
Inventor
Michael D. Clausen
Steven R. Knight
Original Assignee
Parker-Hannifin Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/477,489 external-priority patent/US6289879B1/en
Application filed by Parker-Hannifin Corporation filed Critical Parker-Hannifin Corporation
Priority to EP00972255A priority Critical patent/EP1234111B1/fr
Priority to JP2001540037A priority patent/JP2004500505A/ja
Priority to AT00972255T priority patent/ATE297502T1/de
Priority to BR0015720-1A priority patent/BR0015720A/pt
Priority to DE60020731T priority patent/DE60020731T2/de
Priority to CA002386935A priority patent/CA2386935C/fr
Publication of WO2001038718A1 publication Critical patent/WO2001038718A1/fr

Links

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
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0029—Pressure regulator in the low pressure fuel 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0035—Thermo sensitive 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
    • 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
    • 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
    • F02M37/22—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
    • 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

Definitions

  • the present invention relates generally to fuel systems for internal combustion engines.
  • a tank for holding a supply of fuel
  • an engine where the fuel is converted into energy
  • a filter between the tank and the engine to separate particles and contaminants that could cause adverse effects to the engine.
  • the fuel can wax or plug the filter during cold operation.
  • a heater can be provided internally of the filter housing to heat the fuel and the media as the fuel passes through the filter (see, e.g. , Richard, Patent Specification US-A-4,091,265).
  • Another technique which can be used alternatively or in addition to a filter heater, is to use excess fuel from the engine. Excess fuel that is not burned in the engine is normally recirculated back to the tank. Since the fuel is warmed when it passes through the engine, the fuel can be directed back through the filter to warm the filter. It is believed that prior techniques have included a simple valve that opens under cold temperature operating conditions, and redirects at least a portion of the excess heated fuel back into the filter element. The valve then closes after the engine is warm to direct all the excess fuel back to the tank. While this technique provides some relief from the problem of waxing and plugging of the filter, it is believed that the prior techniques have also recirculated any excess air received back from the engine.
  • the engine supplies air particularly during its priming, and the air is simply fed back with the fuel through the filter to the engine. Recirculating the air with the fuel, however, can effect the combustion characteristics of the engine, which is undesirable from an efficiency standpoint.
  • a fuel system which recirculates excess warm fuel from the engine so as to at least reduce waxing and plugging problems in the filter during cold start, but which can also differentiate between fuel and air, such that only the warm fuel is directed back to the filter during cold star-up, and any air is directed back to the tank.
  • a novel and unique valve for a fuel system which directs excess heated fuel back through the filter during cold operation, and which directs any air from the engine directly back to the tank.
  • the recirculation valve has a body including a fuel supply passage which receives fuel from the tank and directs the fuel to the filter and then on to the engine; and a fuel return passage which receives excess fuel and air from the engine.
  • the fuel return passage includes an enlarged air separation chamber, and a fixed orifice at the downstream end of the air separation chamber to a fuel return outlet port.
  • the orifice has a restricted diameter that allows air to pass to the outlet port, and then back to the tank, but which causes a pressure drop when fuel enters the chamber.
  • a pressure valve is located in a valve passage interconnecting the air separation chamber and the fuel supply passage.
  • the pressure valve includes a spring biased valve head with a valve seal.
  • the pressure valve is normally in a closed condition when only air is present in the air separation chamber to prevent the air from communicating with fuel in the fuel supply passage.
  • the pressure in the chamber increases, and moves the pressure valve into an open condition.
  • the valve is in an open condition, the excess fuel in the chamber flows into the fuel supply passage, and then back the filter, where the warm fuel warms the filter to prevent waxing and plugging.
  • the orifice in the air separation chamber is located toward the upper portion of the chamber such that the air continues to pass directly to the tank, while the fuel, in the bottom portion of the chamber, is directed through the pressure valve and recirculates back to the engine.
  • a thermal actuator can also be provided with the pressure valve to maintain the pressure valve in the closed condition when the fuel through the fuel supply passage is above a predetermined temperature, such as after engine warm-up. In this case, all excess fuel and air is directed through the orifice back to the tank.
  • a relief valve can alternatively be provided in the fuel return outlet port instead of the fixed orifice.
  • the relief valve includes a valve head with a restrictive orifice, where the valve head is spring-biased against an opening into the air separation chamber.
  • the orifice in the relief valve functions in the same manner as the fixed orifice to direct air in the chamber back to the tank, and to cause a pressure drop when fuel is present in the chamber. After the engine warms up and the thermal actuator closes the pressure valve, the relief valve opens to allow excess fuel to easily pass back to the tank with minimal pressure drop.
  • the present invention provides a novel and unique recirculating valve which effectively differentiates between air and fuel, and allows excess heated fuel to recirculate through the fuel system during cold operation to prevent plugging and waxing of the filter, and which directs any air from the engine directly back to the tank.
  • the recirculation valve is simple in construction, and operates effectively to reduce, if not eliminate, any air recirculated back to the engine.
  • Figure 1 is schematic illustration of a fuel system for an internal combustion engine with a recirculation valve constructed according to the principles of the present invention
  • Figure 2 is a cross-sectional side view of a recirculation valve constructed according to the principles of the present invention, with the recirculation valve illustrated in a closed condition;
  • Figure 3 is an exploded view of a pressure valve for the recirculation valve
  • Figure 4 is an enlarged, cross-sectional side view of a portion of the recirculation valve, showing the recirculation valve in an open condition
  • Figure 5 is a cross-sectional side view of the recirculation valve similar to Figure 2, but showing a thermal actuator for the valve in an operative condition;
  • Figure 6 is a cross-sectional side view of a further embodiment of the recirculation valve .
  • a fuel system for an internal combustion engine is indicated generally at 10.
  • the fuel system includes a fuel tank 12 providing fuel through a fuel supply line 14 to an engine 18.
  • the engine 18 is preferrably an internal combustion engine for a vehicle, however, the present invention is applicable to internal combustion engines for any application.
  • a fuel filter 20 is located between the tank and engine to separate particles and other contaminants in the fuel.
  • the fuel filter can be any filter appropriate for the particular application, such as the filter shown in U.S. Patent No. 4,091 ,265.
  • a return line 14 recirculates excess fuel that is not burned in the engine back to tank 12.
  • a fuel recirculation valve, indicated generally at 26, is interposed between return line 24 and supply line 14 to recirculate at least a portion of the hot excess fuel at predetermined temperatures back into supply line 14, where the hot excess fuel can warm the fuel filter 20 to prevent or at least reduce plugging and waxing during cold temperature conditions as at start-up.
  • the recirculating valve 26 includes a one-piece valve body 30 having a fuel supply passage 32.
  • the fuel supply passage 32 has a fuel supply inlet port 34 receiving fuel from the fuel tank and a fuel supply outlet port 36 directing fuel to the engine.
  • Body 30 further includes a fuel return passage 38 with a fuel return inlet port 40 receiving excess fuel from engine 18, and a fuel return outlet port 42 fluidly connected to fuel tank 12.
  • Fuel return passage 38 includes an enlarged air separation chamber, indicated at 43, with ports 40 and 42 connected toward the upper portion of the chamber.
  • a restricted orifice 44 is provided between the chamber 43 and the fuel return outlet port 42.
  • a valve passage 48 interconnects chamber 43 and fuel supply passage 32.
  • Valve passage 48 includes a reduced diameter portion 49 opening into the lower portion of chamber 43, and a enlarged diameter portion 50 opening into fuel supply passage 32.
  • An annular shoulder 51 is defined between reduced portion 49 and enlarged portion 50.
  • the recirculation valve 26 includes a pressure valve, indicated generally at 54.
  • the pressure valve 54 controls the recirculation of excess heated fuel received through fuel return inlet port 40 to the fuel supply passage 32.
  • the pressure valve 54 includes a hollow valve head 56 having an annular elastomeric gasket 58 mounted thereon. Gasket 58 is closely received on a cylindrical body portion 59 of the valve head and retained between a lower annular flange 60 and an upper annular flange 62 at opposite ends of head.
  • the pressure valve 54 further includes a hollow thermal valve body 66 having an outer annular lower spring stop portion 68 and an inner annular lower spring stop portion 70.
  • Body 66 further includes a central cylindrical post 72 projecting axially upward from inner annular lower spring stop portion 70.
  • valve head 56 and thermal valve body 66 are each preferably formed in one piece from an appropriate material, such as plastic.
  • a pressure regulator spring 74 is received about the central post 72 of body 66, and extends between the lower spring stop 70 and the lower annular flange 60 of valve head 56 (see Fig. 2).
  • a thermal actuator return spring 76 is also received about central post 72 and extends between outer spring stop 68 and shoulder 51 in valve passage 49 (see Fig. 2).
  • the pressure valve further includes a thermal actuator 80 that is received within the hollow thermal valve body 66.
  • Thermal actuator 80 includes a cylindrical base 81 which is fixed to a cylindrical flange 83 (Fig. 2) projecting from valve body 30 into fuel supply passage 32.
  • An annular flange 84 surrounds base 81 and allows the actuator to be properly located in a small cylindrical chamber of thermal valve body
  • the thermal actuator 80 further includes a central post 85 which is normally retracted within a cylindrical body 86 in the actuator when the ambient temperature exposed to base 81 is below a predetermined level, but which extends outwardly from body 86 when the ambient temperature exposed to base 81 increases above such predetermined level.
  • the operation of the thermal actuator 80 should be well-known to those skilled in the art.
  • Thermal actuator 80 is preferably a commercially-available actuator from Caltherm, under Part No. CT 5032-02M. Thermal actuators of this type are commonly used in automotive coolant thermostats. It is noted that other types of thermal actuators could also be used with the present invention, one such alternative being a bi-metal, dome-shaped disk which would "flip" from one condition to another depending upon the temperature to which it is exposed. Other such appropriate actuators should also be well-known to those skilled in the art.
  • the thermal actuator 80 fits closely within thermal valve body 66, and the cylindrical post 72 of the thermal valve body 66 is received closely within the hollow cylindrical body
  • thermal actuator return spring 76 biases thermal valve body 66 downwardly, away from shoulder 51, such that the body 66 is maintained in an even, non-cocked position.
  • the pressure regulator spring 74 biases valve head 56 upwardly, toward shoulder 51 , such that gasket 58 is sealed against the shoulder.
  • Shoulder 51 thereby also provides a valve seat for the pressure valve 54.
  • Figure 2 illustrates the cold start or cold operating condition of the engine, where the ambient temperature and fuel are at relatively low temperatures. Fuel is drawn from the fuel tank, and directed through fuel supply passage 32 to the filter, and then on to the engine. The base 81 of the thermal actuator 80 is exposed to the fuel, and the thermal actuator is maintained in a non-operative, or retracted condition.
  • excess air (typically at pressures of less than 2 psi) is received through fuel return inlet port 40 and passes into air separation chamber 43.
  • the pressure valve 54 is set through the spring constant of pressure regulator spring 74, such that the pressure regulator valve remains closed.
  • the air passes through the restricted orifice 54 and through fuel return outlet port 40 directly back to the fuel tank. As such, the pressure valve 54 prevents the air from being recirculated to the engine, and thereby maintains the efficiency of the engine.
  • Air separation chamber 43 is sized so as to collect excess fuel and allow the fuel to recirculate through pressure valve 44, and to allow any returning air to pass through restricted orifice 44 and return directly to the fuel tank.
  • the size of the air separation chamber, the size of the restricted orifice 44, and the spring force on pressure regulator spring 74, can be easily determined depending upon the particular application.
  • a device for controlling the recirculation of fuel in the fuel system of an internal combustion engine.
  • the device effectively separates air from the excess fuel, such that the excess fuel can be used to heat the filter and prevent waxing and plugging during cold-start operation, while any air is directed back to the fuel tank such that it will not reduce the efficiency of the engine.
  • a relief valve can alternatively be provided to accomplish the same result as the fixed orifice 44, as well as to reduce the pressure drop of excess fuel returning to the tank during warm operation.
  • the relief valve 90 includes an annular elastomeric seal 92 with a central restricted orifice 93.
  • a relief spring 96 normally urges seal 92 against an annular flange 97 surrounding an opening 98 into chamber 43.
  • Relief spring 96 preferably has a spring force slightly greater than pressure regulator spring 74, such that the relief valve remains closed when the pressure valve is operational.
  • the spring force of relief spring 96 can also easily be determined depending upon the particular application.
  • the other operating characteristics of the pressure relief valve shown in Figure 6 are the same as described previously with respect to Figures 2-5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

Le corps de vanne (30) de cette vanne de retour (26) pour circuit de carburant (10) de moteur à combustion interne (18) comporte un passage d'arrivée de carburant (32) et un passage de retour de carburant (38). Ce passage de retour de carburant (38) est pourvu d'une chambre de dégazage (43) et d'un orifice à obturateur (44). Une soupape de pression (54) permet au surplus de carburant de retour chaud de la chambre de dégazage (43) de repartir avec le carburant dans le passage d'arrivée de carburant (32). La vanne de retour (26), qui renvoie également l'air dans le réservoir (12), empêche l'air d'arriver dans le moteur (18). Un thermocouple (80) maintient la vanne de pression (54) en position fermée lorsque le carburant dépasse une température définie. Une soupape de décharge (90) peut équiper l'orifice de sortie du retour de carburant (42) de façon à permettre au carburant de repasser facilement dans le réservoir (12) dans les conditions normales de fonctionnement.
PCT/US2000/028787 1999-11-24 2000-10-18 Vanne de retour de carburant a purge d'air WO2001038718A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP00972255A EP1234111B1 (fr) 1999-11-24 2000-10-18 Vanne de retour de carburant a purge d'air
JP2001540037A JP2004500505A (ja) 1999-11-24 2000-10-18 空気を除去できる燃料戻し再循環弁
AT00972255T ATE297502T1 (de) 1999-11-24 2000-10-18 Kraftstoffrückführventil mit entlüftung
BR0015720-1A BR0015720A (pt) 1999-11-24 2000-10-18 Válvula de recirculação de combustìvel de retorno para a eliminação de ar
DE60020731T DE60020731T2 (de) 1999-11-24 2000-10-18 Kraftstoffrückführventil mit entlüftung
CA002386935A CA2386935C (fr) 1999-11-24 2000-10-18 Vanne de retour de carburant a purge d'air

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16447499P 1999-11-24 1999-11-24
US60/164,474 1999-11-24
US09/477,489 2000-01-04
US09/477,489 US6289879B1 (en) 1999-11-24 2000-01-04 Air eliminating return fuel recirculation valve

Publications (1)

Publication Number Publication Date
WO2001038718A1 true WO2001038718A1 (fr) 2001-05-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/028787 WO2001038718A1 (fr) 1999-11-24 2000-10-18 Vanne de retour de carburant a purge d'air

Country Status (3)

Country Link
JP (1) JP2004500505A (fr)
CA (1) CA2386935C (fr)
WO (1) WO2001038718A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754881A2 (fr) 2005-07-06 2007-02-21 Kyosan Denki Co., Ltd. Soupape de recirculation
GB2436854A (en) * 2006-04-03 2007-10-10 Parker Hannifin Corp Apparatus for controlling the temperature of fuel supplied to an engine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5604320B2 (ja) * 2010-09-06 2014-10-08 株式会社クボタ エンジンの燃料供給装置
JP2013221410A (ja) * 2012-04-12 2013-10-28 Fuji Heavy Ind Ltd 航空機燃料の脱気システム及び航空機燃料の脱気方法
KR101405686B1 (ko) 2012-12-18 2014-06-10 현대자동차주식회사 자동차의 에어밴트 시스템

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091265A (en) 1975-08-06 1978-05-23 Racor Industries, Inc. Fuel filter heating assembly
US4502450A (en) * 1979-07-13 1985-03-05 Standard-Thomson Corporation Diesel fuel control valve and system
US4502451A (en) * 1982-08-25 1985-03-05 Standard-Thomson Corporation Diesel fuel control apparatus and system
US4617116A (en) * 1984-05-04 1986-10-14 Ford Motor Company Automotive type fuel feed system
EP0819458A1 (fr) * 1996-07-18 1998-01-21 Filtrauto Filtre à gazole pour moteur diesel et dispositif d'alimentation incluant un tel filtre
EP0887542A2 (fr) * 1997-06-25 1998-12-30 Stanadyne Automotive Corp. Filtre à carburant et circuit de démarrage à froid

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Publication number Priority date Publication date Assignee Title
US4454848A (en) * 1981-09-18 1984-06-19 Duprez Wayne R Diesel fuel control apparatus and system
CA1136501A (fr) * 1979-07-13 1982-11-30 Wayne R. Duprez Systeme et soupape de regulation de l'alimentation en mazout
JPS6123654Y2 (fr) * 1979-12-27 1986-07-15
JPS59175670U (ja) * 1983-05-12 1984-11-24 ヤンマーディーゼル株式会社 低質油機関の循環形燃料供給装置
GB2158150B (en) * 1984-05-04 1987-07-15 Ford Motor Co I c engine fuel injection supply system
JPS643813A (en) * 1987-06-25 1989-01-09 Victor Company Of Japan Floating type magnetic head
JPH066935B2 (ja) * 1989-12-16 1994-01-26 日産自動車株式会社 ディーゼルエンジン用燃料フィルタ装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091265A (en) 1975-08-06 1978-05-23 Racor Industries, Inc. Fuel filter heating assembly
US4502450A (en) * 1979-07-13 1985-03-05 Standard-Thomson Corporation Diesel fuel control valve and system
US4502451A (en) * 1982-08-25 1985-03-05 Standard-Thomson Corporation Diesel fuel control apparatus and system
US4617116A (en) * 1984-05-04 1986-10-14 Ford Motor Company Automotive type fuel feed system
EP0819458A1 (fr) * 1996-07-18 1998-01-21 Filtrauto Filtre à gazole pour moteur diesel et dispositif d'alimentation incluant un tel filtre
EP0887542A2 (fr) * 1997-06-25 1998-12-30 Stanadyne Automotive Corp. Filtre à carburant et circuit de démarrage à froid

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754881A2 (fr) 2005-07-06 2007-02-21 Kyosan Denki Co., Ltd. Soupape de recirculation
EP1754881A3 (fr) * 2005-07-06 2007-11-21 Kyosan Denki Co., Ltd. Soupape de recirculation
US7971849B2 (en) 2005-07-06 2011-07-05 Kyosan Denki Co., Ltd. Recirculating valve
GB2436854A (en) * 2006-04-03 2007-10-10 Parker Hannifin Corp Apparatus for controlling the temperature of fuel supplied to an engine
EP1843036A3 (fr) * 2006-04-03 2009-04-08 Parker Hannifin (UK) Limited Appareil pour le contrôle de la température du combustible fourni à un moteur
GB2436854B (en) * 2006-04-03 2010-12-22 Parker Hannifin Corp Apparatus for controlling the temperature of fuel supplied to an engine

Also Published As

Publication number Publication date
CA2386935C (fr) 2008-04-15
CA2386935A1 (fr) 2001-05-31
JP2004500505A (ja) 2004-01-08

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