FR2889244A1 - Exhaust gas depolluting device for internal combustion engine, has injector supplied by returning circuit of fuel leakages from common injection harness, where circuit has control valve for maintaining fuel leakages under pressure - Google Patents

Exhaust gas depolluting device for internal combustion engine, has injector supplied by returning circuit of fuel leakages from common injection harness, where circuit has control valve for maintaining fuel leakages under pressure Download PDF

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Publication number
FR2889244A1
FR2889244A1 FR0552371A FR0552371A FR2889244A1 FR 2889244 A1 FR2889244 A1 FR 2889244A1 FR 0552371 A FR0552371 A FR 0552371A FR 0552371 A FR0552371 A FR 0552371A FR 2889244 A1 FR2889244 A1 FR 2889244A1
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France
Prior art keywords
fuel
circuit
injector
under pressure
fuel leakages
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Granted
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FR0552371A
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French (fr)
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FR2889244B1 (en
Inventor
Jerome Petit
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Renault SAS
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Renault SAS
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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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The device has a fuel injection system in the exhaust line of an internal combustion engine and comprising an injector (8) placed upstream of a depolluting element (9) e.g. noxtrap, where the system is distinct from that of the engine. The injector sprays fuel in the exhaust line. The injector is supplied by a returning circuit (7) of fuel leakages from a common injection harness (5). The circuit comprises a control valve for maintaining fuel leakages under pressure.

Description

DISPOSITIF DE DEPOLLUTION DES GAZ D'ECHAPPEMENTDEVICE FOR DEPOLLUTING EXHAUST GASES

La présente invention concerne les dispositifs de dépollution des gaz d'échappement d'un moteur à combustion interne à injection, et plus particulièrement les dispositifs de dépollution des gaz d'échappement qui comportent leur propre système d'injection de carburant dans la ligne d'échappement.  The present invention relates to the exhaust gas depollution devices of an internal combustion engine with injection, and more particularly to the exhaust gas depollution devices which comprise their own fuel injection system in the line of combustion. exhaust.

Les moteurs à combustion interne comportent généralement un système d'injection servant à le faire fonctionner. Lorsque le moteur fonctionne, il génère des gaz d'échappement qui contiennent des polluants qu'il faut traiter.  Internal combustion engines generally have an injection system for operating it. When the engine is running, it generates exhaust gases that contain pollutants that need to be treated.

Pour réduire les émissions de polluants dans les gaz d'échappement, les moteurs peuvent comporter leur propre système d'injection de carburant dans la ligne d'échappement, en amont d'un élément de dépollution. Ceci permet de générer de la chaleur dans ce dispositif, et/ou d'augmenter la richesse, la richesse représentant le taux d'hydrocarbures dans un volume de gaz. Le carburant qui est injecté peut provenir du réservoir de carburant du véhicule, ce qui dans ce cas évite de prévoir un réservoir supplémentaire qui serait dédié à ces injections.  To reduce the emissions of pollutants in the exhaust gas, the engines may include their own fuel injection system in the exhaust line, upstream of a depollution element. This makes it possible to generate heat in this device, and / or to increase the richness, the richness representing the hydrocarbon content in a volume of gas. The fuel that is injected can come from the fuel tank of the vehicle, which in this case avoids providing an additional tank that would be dedicated to these injections.

Un problème qui se pose alors est de prévoir un dispositif de dépollution capable de faire parvenir le carburant à l'injecteur. Des solutions connues consistent à utiliser une pompe qui alimente en carburant l'injecteur. Un tel système d'injection est proposé dans le document FR2850704. Cependant, un tel système d'injection reste insuffisant, car il demande d'utiliser des appareils qui entraînent un surcoût important.  A problem that arises then is to provide a depollution device capable of sending the fuel to the injector. Known solutions consist in using a pump that supplies fuel to the injector. Such an injection system is proposed in the document FR2850704. However, such an injection system remains insufficient because it requires the use of devices that cause significant additional cost.

Un des objets de l'invention est de pallier au problème d'alimentation de l'injecteur en carburant.  One of the objects of the invention is to overcome the problem of supply of the fuel injector.

L'invention fournit dans ce but un dispositif de dépollution comportant un injecteur alimenté par un circuit de retour de fuites de carburant d'une rampe commune du moteur.  To this end, the invention provides a depollution device comprising an injector fed by a fuel leak return circuit of a common motor ramp.

Selon d'autres caractéristiques de l'invention le circuit de retour de fuites de carburant peut comporter des moyens pour maintenir les fuites de carburants sous pression, l'injecteur peut être relié au circuit de retour de fuites en amont des moyens pour maintenir les fuites de carburants sous pression, le deuxième système d'injection peut comporter un moyen de commande d'une phase de dépollution, par exemple une vanne pilotée par un calculateur du moteur, le dispositif peut comporter un moyen d'accumulation de carburant.  According to other features of the invention, the fuel leakage return circuit may comprise means for maintaining fuel leaks under pressure, the injector may be connected to the leak return circuit upstream of the means for maintaining leaks. of pressurized fuels, the second injection system may comprise a control means for a depollution phase, for example a valve controlled by an engine computer, the device may comprise a fuel accumulation means.

La présente invention et ses avantages seront mieux compris à la lecture de la description détaillée d'un mode de réalisation pris à titre d'exemple et nullement limitatif, et illustré par les dessins annexés sur lesquels: la figure 1 est un schéma d'un système injection de carburant d'un moteur et du dispositif de dépollution selon l'invention, la figure 2 est un schéma d'un mode de réalisation de 20 l'invention Le moteur à combustion interne comporte un système d'injection 1 en référence à la figure 1. Le système d'injection 1 alimente le moteur en carburant pour le faire fonctionner. Ce système d'injection 1 sera appelé par la suite premier système d'injection 1. Il comporte une partie haute pression et une partie basse pression, la partie basse pression se trouvant en amont d'une pompe à carburant haute pression 4.  The present invention and its advantages will be better understood on reading the detailed description of an embodiment taken by way of example and in no way limiting, and illustrated by the appended drawings in which: FIG. 1 is a diagram of a DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a diagram of an embodiment of the invention. The internal combustion engine comprises an injection system 1 with reference to FIG. Figure 1. Injection system 1 supplies fuel to the engine to operate. This injection system 1 will be called hereinafter the first injection system 1. It comprises a high pressure part and a low pressure part, the low pressure part upstream of a high pressure fuel pump 4.

La partie basse pression comporte un réservoir 2 de carburant. Le réservoir 2 est relié à un filtre 3 qui fournit le carburant filtré à la 30 pompe haute pression 4.  The low pressure portion comprises a fuel tank 2. The tank 2 is connected to a filter 3 which supplies the filtered fuel to the high pressure pump 4.

La partie haute pression comporte la pompe haute pression 4 qui alimente en carburant des injecteurs 6 par le biais d'une rampe commune d'injection 5. La pompe 2 génère des pressions de carburant qui peuvent être supérieures à 1000 bars.  The high pressure portion comprises the high pressure pump 4 which supplies fuel to the injectors 6 via a common injection rail 5. The pump 2 generates fuel pressures that may be greater than 1000 bar.

Ces hautes pressions sont à l'origine de nombreuses fuites qui sont récupérées. Un exemple est le circuit 7 de retour des fuites de 10 carburant qui proviennent de la rampe commune 5. Ce circuit 7 renvoi le carburant dans la partie basse pression du système d'injection. Par exemple le circuit 7 renvoi le carburant au filtre à carburant 3.  These high pressures are the source of many leaks that are recovered. An example is the return circuit 7 for fuel leaks that come from the common rail 5. This circuit 7 returns the fuel in the low pressure part of the injection system. For example, the circuit 7 sends the fuel back to the fuel filter 3.

Le dispositif de dépollution comporte son propre système d'injection de carburant dans la ligne d'échappement. Ce système d'injection est distinct de celui du moteur, et sera appelé deuxième système d'injection de carburant. Le deuxième système d'injection comporte un injecteur 8 qui pulvérise du carburant dans la ligne d'échappement. Il est placé en amont d'un élément 9 de dépollution. L'élément de dépollution peut être un piège à oxydes d'azote, appelé noxtrap , un catalyseur d'oxydation, ou encore un ensemble constitué d'au moins l'un des deux combiné avec un filtre à particules.  The depollution device has its own fuel injection system in the exhaust line. This injection system is separate from that of the engine, and will be called the second fuel injection system. The second injection system comprises an injector 8 which sprays fuel into the exhaust line. It is placed upstream of a depollution element 9. The depollution element may be a nitrogen oxide trap, called a noxtrap, an oxidation catalyst, or an assembly consisting of at least one of the two combined with a particulate filter.

Selon l'invention, l'injecteur 8 est alimenté par le circuit 7 de retour des fuites de carburant de la rampe commune 5.  According to the invention, the injector 8 is fed by the fuel leakage return circuit 7 of the common rail 5.

En référence à la figure 2, le circuit 7 de retour de fuites de carburant de la rampe 5 peut comporter des moyens 10 pour maintenir les fuites de carburants sous pression. Ces moyens 10 évitent d'avoir recours à une pompe supplémentaire au cas où la pression du carburant ne serait pas suffisante pour alimenter l'injecteur 8. Le deuxième système d'injection, et plus particulièrement l'injecteur 8, est relié au circuit 7 de retour de fuites en amont de ces moyens 10 pour maintenir les fuites de carburants sous pression.  With reference to FIG. 2, the fuel leak return circuit 7 of the ramp 5 can comprise means 10 for maintaining leakage of fuels under pressure. These means 10 avoid using an additional pump in case the fuel pressure is not sufficient to supply the injector 8. The second injection system, and more particularly the injector 8, is connected to the circuit 7 return of leaks upstream of these means 10 to maintain the leakage of fuels under pressure.

Ces moyens 10 peuvent consister en un clapet de régulation. Ce clapet de régulation 10 est alors taré à la pression qui est nécessaire pour permettre à l'injecteur 8 de pulvériser du carburant dans la ligne d'échappement. Ce clapet 10 de régularisation peut être intégré au filtre à carburant 3.  These means 10 may consist of a control valve. This regulation valve 10 is then calibrated to the pressure that is necessary to allow the injector 8 to spray fuel into the exhaust line. This regulating valve 10 can be integrated in the fuel filter 3.

Le deuxième système d'injection, ou système d'injection de carburant dans la ligne d'échappement, peut comporter un moyen de commande d'une phase de dépollution. Le moyen de commande peut comporter une vanne 11 pilotée par un calculateur du moteur. Cette vanne 11 est placée en amont de l'injecteur 8. Elle s'ouvre lors du lancement d'une phase de régénération pour permettre l'injection du carburant dans la ligne d'échappement.  The second injection system, or fuel injection system in the exhaust line, may include a control means for a depollution phase. The control means may comprise a valve 11 controlled by a motor computer. This valve 11 is placed upstream of the injector 8. It opens at the launch of a regeneration phase to allow the injection of fuel into the exhaust line.

Selon une variante, le dispositif de dépollution peut comporter un moyen d'accumulation 12, tel qu'un accumulateur. Cet accumulateur 12 peut être disposé en amont de la vanne 1 1, et stocke une partie des fuites de carburant. Il peut ainsi compléter l'alimentation en carburant de l'injecteur 8 quand la vanne 11 est ouverte si le débit de fuite de carburant en provenance du circuit 7 de retour est inférieur au débit nécessaire pour réaliser la phase de dépollution.  According to one variant, the depollution device may comprise an accumulation means 12, such as an accumulator. This accumulator 12 may be disposed upstream of the valve January 1, and stores a portion of the fuel leaks. It can thus supplement the fuel supply of the injector 8 when the valve 11 is open if the fuel leakage flow from the return circuit 7 is less than the flow required to perform the depollution phase.

Claims (8)

Revendicationsclaims 1) Dispositif de dépollution des gaz d'échappement d'un moteur à combustion interne à injection comportant son propre système d'injection de carburant dans la ligne d'échappement du moteur par un injecteur (8) placé en amont d'un élément de dépollution (9), caractérisé en ce que l'injecteur (8) est alimenté par un circuit (7) de retour de fuites de carburant d'une rampe commune (5) d'injection du moteur.  1) Exhaust gas depollution device of an internal combustion engine with injection having its own fuel injection system in the exhaust line of the engine by an injector (8) placed upstream of an element of depollution (9), characterized in that the injector (8) is fed by a fuel leakage return circuit (7) of a common engine injection ramp (5). 2) Dispositif de dépollution selon la revendication 1, caractérisé en ce que l'injecteur (8) est alimenté en carburant sous pression par des moyens maintenant ces fuites de carburants sous pression.  2) A pollution control device according to claim 1, characterized in that the injector (8) is supplied with fuel under pressure by means maintaining these leaks of fuels under pressure. 3) Dispositif de dépollution selon la revendication 2, caractérisé en ce que ces moyens maintenant ces fuites de carburants sous pression sont associés au circuit (7) de retour de fuites.  3) A pollution control device according to claim 2, characterized in that these means maintaining these leaks of pressurized fuels are associated with the circuit (7) return leaks. 4) Dispositif de dépollution selon la revendication 3, caractérisé en ce que l'injecteur (8) est relié au circuit (7) de retour de fuites en amont des moyens (10) pour maintenir les fuites de carburants sous pression.  4) A pollution control device according to claim 3, characterized in that the injector (8) is connected to the leakage return circuit (7) upstream of the means (10) for maintaining leakage of fuel under pressure. 5) Dispositif de dépollution selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le système d'injection de carburant dans la ligne d'échappement comporte un moyen de commande d'une phase de dépollution.  5) A pollution control device according to any one of claims 1 to 4, characterized in that the fuel injection system in the exhaust line comprises a control means of a depollution phase. 6) Dispositif de dépollution selon la revendication 5, caractérisé en ce que le moyen de commande comporte une vanne (11) pilotée par un calculateur du moteur.  6) A pollution control device according to claim 5, characterized in that the control means comprises a valve (11) controlled by a computer engine. 7) Dispositif selon la revendication 5 ou 6, caractérisé en ce qu'il comporte un moyen d'accumulation (12) de carburant.  7) Device according to claim 5 or 6, characterized in that it comprises a fuel accumulation means (12). 8) Dispositif selon la revendication 7, caractérisé en ce que le moyen d'accumulation (12) est disposé en amont du moyen de commande.  8) Device according to claim 7, characterized in that the accumulation means (12) is disposed upstream of the control means.
FR0552371A 2005-07-29 2005-07-29 DEVICE FOR DEPOLLUTING EXHAUST GASES Active FR2889244B1 (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071427A1 (en) * 2007-12-04 2009-06-11 Robert Bosch Gmbh Device for fuel injection in an internal combustion engine
CN102822466A (en) * 2010-04-07 2012-12-12 日野自动车株式会社 Method and device for preventing fuel freezing in postprocessing burner system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5189876A (en) * 1990-02-09 1993-03-02 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification system for an internal combustion engine
GB2357047A (en) * 1999-12-11 2001-06-13 Ford Global Tech Inc Exhaust gas purification system
WO2002043840A1 (en) * 2000-11-30 2002-06-06 Robert Bosch Gmbh Device and method for subsequently treating exhaust gases

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5189876A (en) * 1990-02-09 1993-03-02 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification system for an internal combustion engine
GB2357047A (en) * 1999-12-11 2001-06-13 Ford Global Tech Inc Exhaust gas purification system
WO2002043840A1 (en) * 2000-11-30 2002-06-06 Robert Bosch Gmbh Device and method for subsequently treating exhaust gases

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071427A1 (en) * 2007-12-04 2009-06-11 Robert Bosch Gmbh Device for fuel injection in an internal combustion engine
CN102822466A (en) * 2010-04-07 2012-12-12 日野自动车株式会社 Method and device for preventing fuel freezing in postprocessing burner system
CN102822466B (en) * 2010-04-07 2015-09-02 日野自动车株式会社 The fuel means to prevent freezing of reprocessing buner system and device

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