JP2012041864A - Filter for gas fuel and gas fuel supply apparatus provided therewith - Google Patents

Filter for gas fuel and gas fuel supply apparatus provided therewith Download PDF

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JP2012041864A
JP2012041864A JP2010183663A JP2010183663A JP2012041864A JP 2012041864 A JP2012041864 A JP 2012041864A JP 2010183663 A JP2010183663 A JP 2010183663A JP 2010183663 A JP2010183663 A JP 2010183663A JP 2012041864 A JP2012041864 A JP 2012041864A
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gas fuel
filter
gas
fuel
engine
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Koji Kawayoko
弘司 川横
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JGC Corp
Nikki Co Ltd
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Nikki Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent reliquefaction of gas fuel vaporized by a vaporizer during passage through a filter for gas fuel, in a gas fuel supply apparatus with the filter for gas fuel.SOLUTION: The filter 5A for gas fuel is disposed at a vaporizer 4 downstream side of a gas fuel supply apparatus 2A for heating and vaporizing liquefied gas fuel to supply the fuel to a gas engine 1, and removes impurities contained in the gas fuel by a built-in filter to send the fuel to the downstream side, and a cooling water passage 9 as a heater is branched from a cooling water passage 8 and is attached to the filter. By heating the filter with engine cooling water, reduction of fuel temperature is avoided until reliquefaction is caused according to filtration.

Description

本発明は、ベーパライザで気化したガス燃料から不純物を除去するためのガス燃料用濾過器、及びそれを備えたガス燃料供給装置に関する。   The present invention relates to a gas fuel filter for removing impurities from gas fuel vaporized by a vaporizer, and a gas fuel supply apparatus including the same.

ＬＰＧ等の液化ガス燃料を気化させながら所定正圧のガス燃料に調整して、ガスエンジンの吸気管路に噴射する燃料供給方式が古くから普及している。このような方式においては、図３に示すように燃料タンク３に貯留した液化ガス燃料を加熱・気化させる手段として、エンジン冷却水を冷却水通路８でベーパライザ４に導入・循環させてエンジン冷却水と液化ガス燃料との間で熱交換を行うことが慣用されている。   A fuel supply system in which liquefied gas fuel such as LPG is adjusted to a gas fuel of a predetermined positive pressure while being vaporized and injected into an intake pipe of a gas engine has long been popular. In such a system, as shown in FIG. 3, as a means for heating and vaporizing the liquefied gas fuel stored in the fuel tank 3, engine cooling water is introduced and circulated in the vaporizer 4 through the cooling water passage 8, and the engine cooling water is supplied. It is customary to exchange heat between the gas and the liquefied gas fuel.

また、この場合、エンジン冷機時などのエンジン冷却水が低温の場合には、液化ガス燃料を充分に加熱・気化できない状況も生じるため、例えば特開平１１−３２４８１３号公報に記載されているベーパライザのように、エンジン冷却水の熱を利用することに加えＰＴＣヒータ等の電気式加熱手段を設けて、エンジン冷却水が低温の場合でも液化ガス燃料を充分に加熱・気化可能としたものも普及している。   In this case, when engine cooling water is cold, such as when the engine is cold, there is a situation where the liquefied gas fuel cannot be sufficiently heated and vaporized. For example, a vaporizer described in JP-A-11-324813 In addition to utilizing the heat of engine cooling water, electric heating means such as PTC heaters are provided to enable the liquefied gas fuel to be sufficiently heated and vaporized even when the engine cooling water is at a low temperature. ing.

ところで、このように液化ガス燃料を気体の状態にしてガスエンジンに噴射・供給するガス燃料供給装置においては、図３に示したように、液化ガス燃料中に含まれるオイルや可塑剤等の不純物からインジェクタを保護する目的で、ベーパライザ４からインジェクタ６に繋がる気体燃料通路７の途中にガス燃料用濾過器５Cを配設し、このような不純物を
フィルタで濾過して除去することが一般に行われている。 By the way, in the gas fuel supply apparatus that injects and supplies the liquefied gas fuel in the gaseous state to the gas engine in this way, as shown in FIG. 3, impurities such as oil and plasticizer contained in the liquefied gas fuel. For the purpose of protecting the injector from the gas, generally, a gas fuel filter 5C is disposed in the middle of the gas fuel passage 7 connected from the vaporizer 4 to the injector 6, and such impurities are filtered and removed by a filter. ing.

しかしながら、ガス燃料用濾過器５Cに内蔵されたフィルタ自体がガス燃料の濾過時に
熱交換体としても作用するため、低温時にベーパライザ４で暖められた燃料温度を低下させることがあり、場合により気化したガス燃料が再液化してエンジン不調の原因になってしまうという問題がある。 However, since the filter itself incorporated in the gas fuel filter 5C also acts as a heat exchanger when filtering the gas fuel, the temperature of the fuel warmed by the vaporizer 4 may be lowered at low temperatures, and may be vaporized in some cases. There is a problem that the gas fuel reliquefies and causes engine malfunction.

特開平１１−３２４８１３号公報Japanese Patent Laid-Open No. 11-324813

本発明は、上記のような問題を解決しようとするものであり、ガス燃料用濾過器を備えたガス燃料供給装置について、ベーパライザで気化したガス燃料がガス燃料用濾過器を通過する際に再液化するのを防止できるようにすることを課題とする。   The present invention is intended to solve the above-described problems. Regarding a gas fuel supply apparatus equipped with a gas fuel filter, the gas fuel vaporized by the vaporizer is regenerated when it passes through the gas fuel filter. It is an object to prevent liquefaction.

前記課題を解決するため、本発明は、液化ガス燃料を加熱・気化してガスエンジンに供給するガス燃料供給装置のベーパライザ下流側に配設され、内蔵したフィルタでガス燃料に含まれる不純物を除去して下流側に送るガス燃料用濾過器において、そのフィルタには加熱手段が付設されており、この加熱手段でフィルタを加温することにより、濾過に伴い燃料温度が低下して再液化を生じることを回避する。   In order to solve the above-mentioned problems, the present invention is arranged on the downstream side of a vaporizer of a gas fuel supply device that heats and vaporizes liquefied gas fuel and supplies it to a gas engine, and removes impurities contained in the gas fuel with a built-in filter. In the filter for gas fuel sent downstream, the filter is provided with a heating means, and heating the filter with this heating means causes the fuel temperature to drop along with the filtration to cause reliquefaction. Avoid that.

このように、ガス燃料供給装置のガス燃料用濾過器に内蔵しているフィルタに加熱手段を付設して加温しておくことにより、フィルタを通過するガス燃料の温度が過剰に低下す
ることを回避して、ガス燃料の再液化を確実に防止する。 In this way, by attaching a heating means to the filter built in the gas fuel filter of the gas fuel supply device and heating the filter, the temperature of the gas fuel passing through the filter is excessively lowered. By avoiding it, the re-liquefaction of gas fuel is surely prevented.

また、このガス燃料用濾過器において、その加熱手段が、エンジン冷却水の導入・循環路を有してエンジン冷却水の熱を利用した加熱を行う機能を少なくとも備えている、ことを特徴としたものとすれば、エンジン冷却水温が所定レベル以上に上がった状況でガス燃料の再液化を充分に防止することができる。   Further, in this gas fuel filter, the heating means has at least a function of performing heating using the heat of the engine cooling water by having an introduction / circulation path of the engine cooling water. If so, re-liquefaction of gas fuel can be sufficiently prevented in a situation where the engine cooling water temperature has risen above a predetermined level.

さらに、上述したガス燃料用濾過器において、その加熱手段が、少なくとも電気式ヒータを有して電気的な加熱を行う機能を備えている場合にはエンジン冷却水が低温の場合でもガス燃料の再液化を確実に防止することができる。   Further, in the above-described gas fuel filter, when the heating means has at least an electric heater and a function of performing electrical heating, the gas fuel can be regenerated even when the engine coolant is at a low temperature. Liquefaction can be reliably prevented.

さらにまた、燃料タンク側から液化ガス燃料を導入して加熱・気化するベーパライザと、気化したガス燃料をガスエンジンの吸気管路に噴射するインジェクタと、ベーパライザからインジェクタまで延設されてガス燃料を送る気体燃料通路とを備えたガス燃料供給装置において、その気体燃料通路の途中に上述したガス燃料用濾過器が配設されており、ガスエンジンに再液化したガス燃料を供給しないこととすれば、上述したガス燃料用濾過器の機能を確実に発揮させることができる。   Furthermore, a vaporizer that introduces liquefied gas fuel from the fuel tank side to heat and vaporize, an injector that injects the vaporized gas fuel into the intake pipe of the gas engine, and a gas fuel that is extended from the vaporizer to the injector. In the gas fuel supply device provided with the gas fuel passage, if the gas fuel filter described above is disposed in the middle of the gas fuel passage and the gas fuel re-liquefied is not supplied to the gas engine, The function of the gas fuel filter described above can be exhibited reliably.

ガス燃料を濾過するフィルタに加熱手段を付設した本発明によると、ベーパライザで気化したガス燃料が下流側のガス燃料用濾過器を通過する際に再液化することを防止することができる。   According to the present invention in which heating means is attached to a filter for filtering gas fuel, it is possible to prevent the gas fuel vaporized by the vaporizer from being reliquefied when passing through the downstream gas fuel filter.

本発明における第１の実施の形態のガス燃料供給装置を配設したガスエンジンの燃料供システムの配置図である。1 is a layout view of a fuel supply system for a gas engine in which a gas fuel supply device according to a first embodiment of the present invention is provided. 本発明における第２の実施の形態のガス燃料供給装置を配設したガスエンジンの燃料供給システムの配置図である。It is a layout view of a fuel supply system of a gas engine provided with a gas fuel supply device of a second embodiment of the present invention. 従来例によるガス燃料供給装置を配設したガスエンジンの燃料供給システムの配置図である。It is a layout view of a fuel supply system of a gas engine provided with a gas fuel supply device according to a conventional example.

以下に、図面を参照しながら本発明を実施するための形態を説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

図１は、本発明における第１の実施の形態としてのガス燃料供給装置２Aを配設したガ
スエンジン１の燃料供給システムの配置図を示している。本実施の形態では、図３に示した従来と同様に、ガスエンジン１に供給する液化ガス燃料としてＬＰＧを想定しており、燃料タンク３貯留した液化ガス燃料を、ベーパライザ４に液体の状態で送出するようになっている。 FIG. 1 shows a layout of a fuel supply system of a gas engine 1 provided with a gas fuel supply device 2A as a first embodiment of the present invention. In the present embodiment, LPG is assumed as the liquefied gas fuel supplied to the gas engine 1 as in the conventional case shown in FIG. 3, and the liquefied gas fuel stored in the fuel tank 3 is supplied to the vaporizer 4 in a liquid state. It is supposed to be sent out.

そして、ベーパライザ４内に導入した液化ガス燃料を加熱し、気体の状態にして気体燃料通路７を通りインジェクタ６に送出することでガスエンジン１に供給するものであるが、その際、液化ガス燃料中に含有しているオイルや可塑剤等の残渣分（不純物）は気化により分離抽出されることから、これを気体燃料通路７の途中に配設した気体燃料用濾過器５Aのフィルタで濾過して除去することにより、インジェクタ６を保護するようになって
いる。 Then, the liquefied gas fuel introduced into the vaporizer 4 is heated to be in a gaseous state and sent to the injector 6 through the gaseous fuel passage 7 and supplied to the gas engine 1. Residues (impurities) such as oil and plasticizer contained therein are separated and extracted by vaporization, and are filtered through a filter of a gas fuel filter 5A disposed in the middle of the gas fuel passage 7. By removing it, the injector 6 is protected.

しかしながら、図３に示した従来例においては、ベーパライザ４でガス燃料を加熱・気化してインジェクタ６側に送出する際、ガス燃料がガス燃料用濾過器５Cを通過する時に
、そのフィルタと熱交換することで外気温程度まで冷却されて再液化してしまい、これが
インジェクタ６から噴射されることでエンジン不調を招く結果となる、という問題があった。 However, in the conventional example shown in FIG. 3, when gas fuel is heated and vaporized by the vaporizer 4 and sent to the injector 6 side, when the gas fuel passes through the gas fuel filter 5C, heat exchange with the filter is performed. As a result, it is cooled to about the outside air temperature and is liquefied again, and there is a problem that this causes the engine malfunction by being injected from the injector 6.

そこで、本発明において、ガス燃料用濾過器５Aに内蔵したフィルタに加熱手段を付設
し、この加熱手段でフィルタを加温しておくことにより、濾過に伴うガス燃料の過剰な温度低下を回避してその再液化を防止できるようにした。 Therefore, in the present invention, a heating means is attached to the filter built in the gas fuel filter 5A, and the filter is heated by this heating means, thereby avoiding an excessive temperature drop of the gas fuel accompanying filtration. So that reliquefaction can be prevented.

本実施の形態では、ガスエンジン１から延設された冷却水通路８の送出側から冷却水通路９を分岐してガス燃料用濾過器５Ａに接続してから冷却水通路８の戻し側に接続して循環路を形成しており、これが加熱手段を構成するものとして、ガス燃料用濾過器５Ａ内にエンジン冷却水を導入・循環させてフィルタを加温するようになっている。   In the present embodiment, the cooling water passage 9 is branched from the delivery side of the cooling water passage 8 extending from the gas engine 1 and connected to the gas fuel filter 5A and then connected to the return side of the cooling water passage 8. Thus, a circulation path is formed, and this constitutes a heating means. The engine cooling water is introduced and circulated in the gas fuel filter 5A to heat the filter.

この構成により、エンジン冷却水温が所定レベル以上ある場合には、ガス燃料用濾過器５Ａのフィルタがエンジン冷却水により加温されることで、ガス燃料用濾過器５Ａに導入されフィルタで濾過されたガス燃料の温度が再液化を招くようなレベルまで低下しないものとなり、その再液化を防止することができる。   With this configuration, when the engine cooling water temperature is equal to or higher than a predetermined level, the filter of the gas fuel filter 5A is heated by the engine cooling water, so that it is introduced into the gas fuel filter 5A and filtered through the filter. The temperature of the gas fuel does not decrease to a level that causes reliquefaction, and the reliquefaction can be prevented.

図２は、本発明における第２の実施の形態としてのガス燃料供給装置２Ｂを配設した、ガスエンジンの燃料供給システムの配置図を示している。前述したガス燃料供給装置２Ａにおいては、ガス燃料用濾過器５Ａの加熱手段がエンジン冷却水の熱を利用する構成であるため、エンジン冷却水温が所定レベル未満である間は充分なる加熱機能が発揮されないという難点がある。   FIG. 2 is a layout view of a fuel supply system for a gas engine, in which a gas fuel supply device 2B according to a second embodiment of the present invention is provided. In the gas fuel supply device 2A described above, since the heating means of the gas fuel filter 5A uses the heat of the engine cooling water, a sufficient heating function is exhibited as long as the engine cooling water temperature is below a predetermined level. There is a difficulty that is not done.

そこで、本実施の形態のガス燃料供給装置２Ｂにおいては、そのガス燃料用濾過器５Ｂの加熱手段として電気式ヒータ５１を内蔵して電気的な加熱を可能とした点を特徴としている。これにより、エンジン冷却水温が充分に高くない状況であっても、ガス燃料用濾過器５Ｂに内蔵したフィルタを所定温度まで加温することができ、これを通過するガス燃料が再液化を生じるようなレベルまで温度低下するのを回避して、その再液化を防止できるようにしている。   Therefore, the gas fuel supply device 2B of the present embodiment is characterized in that an electric heater 51 is incorporated as a heating means of the gas fuel filter 5B to enable electric heating. As a result, even in a situation where the engine coolant temperature is not sufficiently high, the filter built in the gas fuel filter 5B can be heated to a predetermined temperature, and the gas fuel passing through the filter can be reliquefied. Therefore, it is possible to prevent re-liquefaction by avoiding a temperature drop to a certain level.

尚、前述の場合において、図示しない電子制御ユニットが温度センサを介して外気温又はガス燃料用濾過器５Ｂのフィルタ温度を検知するものとし、この電子制御ユニットで温度状況に応じて電気式ヒータ５１への通電を制御する構成とすれば、無駄な電力消費を回避しやすい。   In the above-described case, an electronic control unit (not shown) detects the outside air temperature or the filter temperature of the gas fuel filter 5B via a temperature sensor. If it is set as the structure which controls the electricity supply to, it will be easy to avoid useless power consumption.

また、図示は省略するが、ガス燃料用濾過器５Ａのエンジン冷却水の熱を利用する冷却水通路９による加熱手段と、ガス燃料用濾過器５Ｂの電気式ヒータ５１による加熱手段を併用することも可能であり、この場合も電子制御ユニットがエンジン冷却水温を検知しながら、その温度状況に応じて電気式ヒータ５１への通電を最小限に抑えるように制御を実行する構成とすれば、前述と同様に無駄な電力消費を回避しやすいものとなる。   Although not shown, heating means by the cooling water passage 9 using the heat of the engine cooling water of the gas fuel filter 5A and heating means by the electric heater 51 of the gas fuel filter 5B are used in combination. Also in this case, if the electronic control unit detects the engine cooling water temperature and performs control so as to minimize the energization to the electric heater 51 according to the temperature condition, Similarly, it is easy to avoid wasteful power consumption.

以上、述べたように、ガス燃料用濾過器を備えたガス燃料供給装置について、本発明により、ベーパライザで気化したガス燃料が下流側のガス燃料用濾過器を通過する際に再液化するのを有効に防止することができる。   As described above, in the gas fuel supply device including the gas fuel filter, according to the present invention, the gas fuel vaporized by the vaporizer is reliquefied when passing through the gas fuel filter on the downstream side. It can be effectively prevented.

１ ガスエンジン、２Ａ，２Ｂ ガス燃料供給装置、３ 燃料タンク、４ ベーパライザ、５Ａ，５Ｂ ガス燃料用濾過器、６ インジェクタ、７ 気体燃料通路、８，９ 冷却水通路、５１ 電気式ヒータ
DESCRIPTION OF SYMBOLS 1 Gas engine, 2A, 2B Gas fuel supply apparatus, 3 Fuel tank, 4 Vaporizer, 5A, 5B Gas fuel filter, 6 Injector, 7 Gas fuel passage, 8, 9 Cooling water passage, 51 Electric heater

Claims (4)

液化ガス燃料を加熱・気化してガスエンジンに供給するガス燃料供給装置のベーパライザ下流側に配設され、内蔵したフィルタでガス燃料に含まれる不純物を除去して下流側に送るガス燃料用濾過器において、前記フィルタには加熱手段が付設されており、該加熱手段で前記フィルタを加温することにより、濾過に伴って燃料温度が低下して再液化を生じることを回避することを特徴としたガス燃料用濾過器。   A gas fuel filter that is disposed downstream of a vaporizer in a gas fuel supply device that heats, vaporizes, and supplies liquefied gas fuel to a gas engine, removes impurities contained in the gas fuel with a built-in filter, and sends it to the downstream side In the above, the filter is provided with a heating means, and by heating the filter with the heating means, it is possible to avoid the occurrence of reliquefaction due to a decrease in fuel temperature accompanying filtration. Gas fuel filter. 前記加熱手段が、少なくともエンジン冷却水の導入・循環路を有して前記エンジン冷却水の熱を利用した加熱を行う機能を備えていることを特徴とする請求項１に記載したガス燃料用濾過器。   2. The gas fuel filtration according to claim 1, wherein the heating means has at least an engine cooling water introduction / circulation path and has a function of heating using the heat of the engine cooling water. vessel. 前記加熱手段が、少なくとも電気式ヒータを有して電気的な加熱を行う機能を備えていることを特徴とする請求項１または２に記載したガス燃料用濾過器。   The gas fuel filter according to claim 1 or 2, wherein the heating means has at least an electric heater and has a function of performing electrical heating. 燃料タンク側から液化ガス燃料を導入して加熱・気化する前記ベーパライザと、ガス燃料を前記ガスエンジンの吸気管路に噴射する前記インジェクタと、前記ベーパライザから前記インジェクタまで延設されてガス燃料を送る気体燃料通路とを備えた前記ガス燃料供給装置において、前記気体燃料通路の途中に請求項１，２または３に記載したガス燃料用濾過器が配設されており、前記ガスエンジンに再液化したガス燃料を供給しないことを特徴としたガス燃料供給装置。
The vaporizer that introduces liquefied gas fuel from the fuel tank side to heat and vaporize, the injector that injects the gas fuel into the intake pipe of the gas engine, and the gas fuel that is extended from the vaporizer to the injector In the gas fuel supply device comprising a gas fuel passage, the gas fuel filter according to claim 1, 2 or 3 is disposed in the middle of the gas fuel passage, and is reliquefied in the gas engine. A gas fuel supply device characterized by not supplying gas fuel.
JP2010183663A 2010-08-19 2010-08-19 Filter for gas fuel and gas fuel supply apparatus provided therewith Withdrawn JP2012041864A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102817746A (en) * 2012-09-12 2012-12-12 潍柴动力西港新能源发动机有限公司 Gas temperature control system of natural gas engine
US9895642B2 (en) 2015-08-10 2018-02-20 Hyundai Motor Company Filter device for gas container and method of installing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102817746A (en) * 2012-09-12 2012-12-12 潍柴动力西港新能源发动机有限公司 Gas temperature control system of natural gas engine
US9895642B2 (en) 2015-08-10 2018-02-20 Hyundai Motor Company Filter device for gas container and method of installing the same

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