JP2005325690A - Regulator for lpg - Google Patents

Regulator for lpg Download PDF

Info

Publication number
JP2005325690A
JP2005325690A JP2004142103A JP2004142103A JP2005325690A JP 2005325690 A JP2005325690 A JP 2005325690A JP 2004142103 A JP2004142103 A JP 2004142103A JP 2004142103 A JP2004142103 A JP 2004142103A JP 2005325690 A JP2005325690 A JP 2005325690A
Authority
JP
Japan
Prior art keywords
lpg
heating means
pressure regulating
chamber
regulator
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2004142103A
Other languages
Japanese (ja)
Inventor
Koji Kawayoko
弘司 川横
Kazuhisa Hattori
和久 服部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikki Co Ltd
Original Assignee
Nikki Co Ltd
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
Application filed by Nikki Co Ltd filed Critical Nikki Co Ltd
Priority to JP2004142103A priority Critical patent/JP2005325690A/en
Priority to KR1020040101306A priority patent/KR20050109038A/en
Publication of JP2005325690A publication Critical patent/JP2005325690A/en
Pending legal-status Critical Current

Links

Images

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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/06—Apparatus for de-liquefying, e.g. by heating
    • 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
    • F02M15/00—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture
    • F02M15/02—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture with heating means, e.g. to combat ice-formation
    • F02M15/04—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture with heating means, e.g. to combat ice-formation the means being electrical
    • F02M15/045—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture with heating means, e.g. to combat ice-formation the means being electrical for the fuel system, e.g. built into the fuel conduits or nozzles
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a regulator for LPG utilizing both a hot-water heating means employing engine cooling water and an electric heating means employing an electric heater, wherein excellent startability of an engine and operability thereafter can be achieved by implementing a complete vaporization of LPG to surely prevent liquid LPG from being fed to a suction conduit even if vaporization tends to be insufficient due to low temperature of engine cooling water. <P>SOLUTION: In a regulator 3A for LPG which is equipped with a hot-water heating part 32 having a cooling water passage 32b, an electric heating part 31 having a PTC heater 31b and a pressure regulating part 30 having a pressure regulating chamber 30a, and which heats and vaporizes liquid LPG and adjusts the LPG to the prescribed pressure so as to feed the vaporized LPG to a suction conduit of the LPG engine, the electric heating part 31 is arranged on the downstream side of the hot-water heating part 32 and on the upstream side of the pressure regulating part 30a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はＬＰＧを加熱気化するとともに所定圧力に調整してＬＰＧエンジンの吸気管路に送出するＬＰＧ用レギュレータに関する。   The present invention relates to an LPG regulator that heats and vaporizes LPG, adjusts the LPG to a predetermined pressure, and sends the LPG to an intake pipe of an LPG engine.

ＬＰＧは従前より火花点火エンジンの燃料に用いられているが、レギュレータ（ベーパライザ）とミキサとを使用して大気圧程度に減圧した気化ガスとして吸気管路に吸引させてエンジンに供給する方式が広く実施されており、また例えば特開平６−１７７０９号公報に記載されているように所定正圧の気化ガスに調整して吸気管路に噴射させる方式も広く知られている。   LPG has been used as a fuel for spark ignition engines for a long time, but there are a wide variety of systems that use a regulator (vaporizer) and a mixer to suck into the intake pipe as vaporized gas that has been reduced to atmospheric pressure and supply it to the engine. In addition, as described in, for example, Japanese Patent Laid-Open No. 6-17709, a method of adjusting the vaporized gas to a predetermined positive pressure and injecting it into the intake pipe is widely known.

そして、ボンベから取り出した液体のＬＰＧを加熱気化させる方式として、特開平６−１９３５１３号公報に記載されているようにエンジン冷却水を用いる方式が一般的であるが、この方式は冷間始動時など冷却水の温度が低い場合に液体ＬＰＧを充分に気化できない、という不都合が生じる。   As a method for heating and vaporizing the LPG of the liquid taken out from the cylinder, a method using engine cooling water is generally used as described in JP-A-6-193513. When the temperature of the cooling water is low, the liquid LPG cannot be sufficiently vaporized.

これに対し、図３の配置図に示されるようにエンジン冷却水の熱を利用する温水加熱手段３２に加えてＰＴＣヒータなどの電気ヒータを用いた電気加熱手段３１をレギュレータ３に付帯させて冷却水温度が低くてもＬＰＧを加熱気化できるようにすることが、特開平５−２２３０１４号公報や特開平１１−３２４８１３号公報に提案されている。   On the other hand, as shown in the layout diagram of FIG. 3, in addition to the hot water heating means 32 using the heat of the engine cooling water, the electric heating means 31 using an electric heater such as a PTC heater is attached to the regulator 3 for cooling. JP-A-5-223014 and JP-A-11-324813 propose that LPG can be heated and vaporized even when the water temperature is low.

ところが、特開平１１−３２４８１３号公報に記載の方式は、図３に示したように温水加熱手段の下流側に電気加熱手段を配置した構成であるため、低温始動時などのエンジン冷却水温度が極めて低い場合に電気加熱手段で気化したＬＰＧが下流の温水加熱手段で再び冷却されて再液化してしまい、混合気過濃によるエンジン不調やエンジン停止を招く、という問題を生じやすい。   However, the method described in Japanese Patent Application Laid-Open No. 11-324813 has a configuration in which an electric heating means is arranged downstream of the hot water heating means as shown in FIG. When the temperature is extremely low, the LPG vaporized by the electric heating means is cooled again by the downstream hot water heating means and is liquefied again, which tends to cause a problem that the engine malfunctions or the engine stops due to the rich mixture.

一方、特開平５−２２３０１４号公報に記載の方式は、温水加熱手段の下流側に電気加熱手段を配置した構成であるため、電気的に加熱されて気化したＬＰＧが再液化することを回避することができる。しかしながら、この方式は電気加熱手段がレギュレータの一次減圧室に配置されていることから、冷間始動時などに一次減圧室に入るＬＰＧは温度が低いままであることから液体部分を多量に含んでいるため、一次減圧室内での気化が不十分となって燃料噴射弁に送られる気体ＬＰＧに液体ＬＰＧが混入してしまう、という問題を生じやすい。
特開平６−１７７０９号公報 特開平６−１９３５１３号広報 特開平５−２２３０１４号公報 特開平１１−３２４８１３号公報 On the other hand, the method described in Japanese Patent Laid-Open No. 5-223014 has a configuration in which an electric heating means is disposed downstream of the hot water heating means, and thus avoids reliquefaction of LPG that is electrically heated and vaporized. be able to. However, in this method, since the electric heating means is disposed in the primary decompression chamber of the regulator, the LPG entering the primary decompression chamber at the time of cold start or the like has a low temperature, and thus contains a large amount of liquid part. Therefore, there is a tendency that the liquid LPG is mixed into the gas LPG sent to the fuel injection valve due to insufficient vaporization in the primary decompression chamber.
JP-A-6-17709 JP-A-6-193513 Japanese Patent Laid-Open No. 5-223014 Japanese Patent Laid-Open No. 11-324813

本発明は、上記のような問題点を解決しようとするものであり、エンジン冷却水を用いる温水加熱手段および電気ヒータ用いる電気加熱手段を併用したＬＰＧ用レギュレータについて、低温始動時などエンジン冷却水の温度が低くＬＰＧの気化が不十分となりやすい場合でも、ＬＰＧを完全に気化して液体ＬＰＧが吸気管路に送出されることを確実に回避し、エンジンの始動性およびその後の運転性を良好にすることを課題とする。   The present invention is intended to solve the above-described problems. Regarding an LPG regulator that uses both hot water heating means that uses engine cooling water and electric heating means that uses an electric heater, engine cooling water such as at low temperature start-up can be used. Even when the temperature is low and vaporization of LPG tends to be insufficient, LPG is completely vaporized and liquid LPG is surely avoided from being sent to the intake pipe, improving engine startability and subsequent drivability The task is to do.

そこで本発明は、エンジン冷却水を用いる温水加熱手段と電気ヒータを用いる電気加熱手段と調圧室を有する気化ガス調圧手段とを具え、液体ＬＰＧを加熱気化するとともに所定圧力に調整してＬＰＧエンジンの吸気管路に送出するＬＰＧ用レギュレータにおいて、電気加熱手段を温水加熱手段の下流側であって調圧室の上流側に配置したものとした。尚、本発明における調圧室は、ＬＰＧを二段減圧して大気圧程度の気化ガスとするものでは一次減圧室であり、ＬＰＧを一段減圧して所定正圧の気化ガスとするものでは単一の減圧室である。   Therefore, the present invention includes a hot water heating means using engine cooling water, an electric heating means using an electric heater, and a vaporized gas pressure regulating means having a pressure regulating chamber, which heats and vaporizes the liquid LPG and adjusts the LPG to a predetermined pressure. In the regulator for LPG delivered to the intake pipe of the engine, the electric heating means is disposed downstream of the hot water heating means and upstream of the pressure regulating chamber. The pressure regulating chamber in the present invention is a primary decompression chamber when the LPG is depressurized in two stages to obtain a vaporized gas at about atmospheric pressure, and a single pressure depressurization chamber is obtained when the LPG is depressurized one stage to obtain a predetermined positive pressure vaporized gas. One decompression chamber.

このように電気加熱手段を温水加熱手段の下流側に配置したことで、低温始動時などにおいて電気的に加熱されて気化したＬＰＧが、低温のエンジン冷却水が通る温水加熱手段により再び液化してしまうことを回避することができる。加えて、電気加熱手段を調圧室の上流側に配置したことで液体ＬＰＧが調圧室に入ることがなく、従って液体ＬＰＧが吸気管路に送出されることを確実に回避することができる。   By arranging the electric heating means downstream of the hot water heating means in this way, the LPG that is electrically heated and vaporized at the time of low temperature start or the like is liquefied again by the hot water heating means through which the low-temperature engine cooling water passes. Can be avoided. In addition, since the electric heating means is arranged on the upstream side of the pressure regulating chamber, the liquid LPG does not enter the pressure regulating chamber, and therefore it is possible to reliably avoid the liquid LPG being sent to the intake pipe. .

また、上述したＬＰＧ用レギュレータを、電気加熱手段、温水加熱手段、気化ガス調圧手段の三つを一体化して一個の装置とすれば、全体としてコンパクトなものとなって、燃料供給システム内に配設するためのスペースを小さいものとしながら充分にその機能を発揮させることができる。   Further, if the above-described LPG regulator is integrated into one device by combining the electric heating means, the hot water heating means, and the vaporized gas pressure adjusting means, the entire system becomes compact and is contained in the fuel supply system. The function can be sufficiently exerted while reducing the space for disposition.

さらに、その電気加熱手段について、電気ヒータが配置されている加熱室を上下に縦長のものとして、その下端側に温水加熱手段からの流入口を設け上端側に調圧室への流出口を設けたものとすれば、軽比重の気体ＬＰＧのみが上端側から調圧室に流入するようになるため、吸気管路に送出される気体ＬＰＧに液体ＬＰＧが混入してしまうことを確実に回避することができる。そして、電気ヒータをＰＴＣヒータが縦置きに配置されたものとすれば、ＰＴＣヒータの放熱面に沿ってＬＰＧが上方へ流れることで熱交換効果がすぐれたものとなるためＬＰＧがさらに確実に気化されやすくなる。   Further, regarding the electric heating means, the heating chamber in which the electric heater is disposed is vertically long, and an inlet from the hot water heating means is provided at the lower end side, and an outlet to the pressure regulating chamber is provided at the upper end side. If this is the case, only the light specific gravity gas LPG flows into the pressure adjusting chamber from the upper end side, so that the liquid LPG is reliably prevented from being mixed into the gas LPG delivered to the intake pipe. be able to. If the PTC heaters are arranged vertically in the electric heater, the LPG flows upward along the heat dissipation surface of the PTC heater, so that the heat exchange effect is excellent, so that the LPG is more reliably vaporized. It becomes easy to be done.

本発明によると、温水加熱手段と電気加熱手段とを併用したＬＰＧ用レギュレータについて、温度が低くＬＰＧを完全に気化させにくい状況においてもＬＰＧが液体のまま吸気管路に送出されることを有効に防止して、エンジンの始動性およびその後の運転性を良好なものとすることができるものである。   According to the present invention, an LPG regulator that uses both hot water heating means and electric heating means can effectively deliver LPG as a liquid to the intake pipe even when the temperature is low and LPG is not easily vaporized. Thus, the engine startability and the subsequent drivability can be improved.

図１は、本発明のレギュレータ３Ａが配置されたＬＰＧエンジンの燃料供給システムの配置図を示している。ボンベ１に液体の状態で貯留されているＬＰＧは、液体ＬＰＧ流路９Ａ，気体ＬＰＧ流路９Ｂを通ってエンジン４の吸気管路４ｂに設置した燃料噴射弁５に供給されるようになっている。そして、その経路のボンベ１に近接位置に遮断弁２が配置され、その下流側にレギュレータ３Ａが配置されている。   FIG. 1 shows a layout of a fuel supply system for an LPG engine in which the regulator 3A of the present invention is disposed. The LPG stored in the cylinder 1 in a liquid state is supplied to the fuel injection valve 5 installed in the intake pipe 4b of the engine 4 through the liquid LPG channel 9A and the gas LPG channel 9B. Yes. And the shut-off valve 2 is arrange | positioned in the proximity | contact position to the cylinder 1 of the path | route, and the regulator 3A is arrange | positioned in the downstream.

レギュレータ３Ａは、主に図２を参照して気化ガス調圧手段として調圧室３０ａを有する調圧部３０、電気加熱手段として加熱室３１ｃにＰＴＣヒータ３１ｂを配設した電気加熱部３１、温水加熱手段として冷却水通路３２ｂを有する温水加熱部３２を具えている。そして、レギュレータ３Ａの底部側に配置された温水加熱部３２の冷却水通路３２ｂは、エンジン４の冷却水ジャケット４ａと冷却水送出路８ａ，冷却水戻し路８ｂによって接続されている。   The regulator 3A mainly includes a pressure adjusting unit 30 having a pressure adjusting chamber 30a as a vaporized gas pressure adjusting unit with reference to FIG. 2, an electric heating unit 31 having a PTC heater 31b disposed in a heating chamber 31c as an electric heating unit, A hot water heating unit 32 having a cooling water passage 32b is provided as a heating means. And the cooling water path 32b of the hot water heating part 32 arrange | positioned at the bottom part side of the regulator 3A is connected by the cooling water jacket 4a of the engine 4, the cooling water delivery path 8a, and the cooling water return path 8b.

冷却水ジャケット４ａ内のエンジン冷却水は、冷却水送出路８ａを経由して温水加熱部３２内の冷却水通路３２ｂに送られ、加熱室３２aを邪魔板によって蛇行しながら流れるＬＰＧと熱交換を行い、冷却水戻し路８ｂを経由して冷却水ジャケット４ａに戻され循環するようになっている。尚、燃料噴射弁５からの燃料噴射および遮断弁２の開閉とＰＴＣヒータ３１ｂへの通電は、図示しない電子式制御装置で制御されるようになっている。また、この電子式制御装置はボンベ１に配置された図示しない温度センサでＬＰＧ温度を検知するとともに、エンジン４の冷却水ジャケット４ａに配置された図示しない温度センサでエンジン温度を検知するようになっている。   The engine cooling water in the cooling water jacket 4a is sent to the cooling water passage 32b in the hot water heating unit 32 via the cooling water delivery path 8a, and exchanges heat with the LPG flowing while meandering the heating chamber 32a by a baffle plate. And then returned to the cooling water jacket 4a via the cooling water return path 8b and circulates. The fuel injection from the fuel injection valve 5, the opening and closing of the shutoff valve 2, and the energization to the PTC heater 31b are controlled by an electronic control device (not shown). The electronic control device detects the LPG temperature with a temperature sensor (not shown) arranged in the cylinder 1 and detects the engine temperature with a temperature sensor (not shown) arranged in the cooling water jacket 4 a of the engine 4. ing.

図１のレギュレータ３Ａを拡大した縦断面図である図２を参照して、レギュレータ３Ａは、液体ＬＰＧを加熱気化する熱交換器としての温水加熱部３２および電気加熱部３１、ならびに気化したＬＰＧを所定圧力に調整するための調圧部３０とを具えている。また、このレギュレータ３Ａは調圧部３０と温水加熱部３２および電気加熱部３１とが一体となって一個の装置に形成されているとともに、温水加熱部３２の下流側に配置された電気加熱部３１が、調圧部３０における調圧室３０ａの外部上流側に配置されていることを特徴の一つとしている。   Referring to FIG. 2 which is an enlarged vertical sectional view of the regulator 3A in FIG. 1, the regulator 3A includes a hot water heating unit 32 and an electric heating unit 31 as heat exchangers for heating and vaporizing the liquid LPG, and the vaporized LPG. And a pressure adjusting unit 30 for adjusting to a predetermined pressure. In addition, the regulator 3 </ b> A includes the pressure adjusting unit 30, the hot water heating unit 32, and the electric heating unit 31 integrally formed in one device, and an electric heating unit disposed on the downstream side of the hot water heating unit 32. One of the features is that 31 is arranged on the upstream side of the pressure regulating chamber 30a in the pressure regulating unit 30.

レギュレータ３Ａの調圧部３０は、調圧室３０ａの圧力が設定圧力よりも低くなるとダイヤフラム３０ｃが入口弁３０ｄを開いて電気加熱部３１の加熱室３１ｃ内で気化されたＬＰＧを流出口３１ｄより調圧室３０ａに流入させ、設定圧力よりも高くなると入口弁３０ｄを閉じて調圧室３０ａへの流入を停止させることにより、調圧室３０ａに一定の圧力に減圧された気体ＬＰＧを保有させる、という従来のものと同様の動作を行う。   When the pressure in the pressure adjusting chamber 30a becomes lower than the set pressure, the pressure adjusting unit 30 of the regulator 3A opens the inlet valve 30d and the LPG vaporized in the heating chamber 31c of the electric heating unit 31 is discharged from the outlet 31d. When the pressure is made to flow into the pressure regulating chamber 30a and becomes higher than the set pressure, the inlet valve 30d is closed and the flow into the pressure regulating chamber 30a is stopped, so that the pressure regulating chamber 30a holds the gas LPG decompressed to a constant pressure. The same operation as the conventional one is performed.

レギュレータ３ＡにおけるＬＰＧ流路は、ボンベ１から延びる液体ＬＰＧ流路９Ａが温水加熱部３２の加熱室３２ａの底部に接続され、この加熱室３２ａの上端部が流入口３１ａにより電気加熱部３１の加熱室３１ｃの底部に接続され、さらにこの加熱室３１ｃの頂部が流出口３１ｄにより調圧部３０の調圧室３０aに接続され、調圧室３０aの上部に接続した気体ＬＰＧ流路９Ｂを経て燃料噴射弁５にＬＰＧを送出するようになっている。   In the LPG flow path in the regulator 3A, the liquid LPG flow path 9A extending from the cylinder 1 is connected to the bottom of the heating chamber 32a of the hot water heating unit 32, and the upper end of the heating chamber 32a is heated by the inflow port 31a. The fuel is connected to the bottom of the chamber 31c, and the top of the heating chamber 31c is connected to the pressure regulating chamber 30a of the pressure regulating section 30 through the outlet 31d, and the gas LPG flow path 9B is connected to the top of the pressure regulating chamber 30a. LPG is sent to the injection valve 5.

電気加熱部３１は、縦長の空間である加熱室３１ｃ内に、ＰＴＣヒータ３１ｂを調圧室３０ａとの隔壁に導電性接着剤で接着して縦置きに配置している。従って、この上下に長い加熱室３１ｃにおいて、ＬＰＧがＰＴＣヒータ３１ｂの放熱面に沿って上昇しながら効率的に加熱されるものであり、温水加熱部３２からの流入口３１ａがその下端部に設けられ調圧室３０ａへの流出口３１ｄが上端部に設けられていることで、液体ＬＰＧと加熱気化された気体ＬＰＧとがその比重差で上下に分離され、気体ＬＰＧのみが調圧室３０ａに流入するようになっている。   The electric heating unit 31 is disposed vertically in a heating chamber 31c which is a vertically long space by bonding a PTC heater 31b to a partition wall with the pressure regulating chamber 30a with a conductive adhesive. Accordingly, in the heating chamber 31c that is long above and below, the LPG is efficiently heated while rising along the heat radiation surface of the PTC heater 31b, and the inlet 31a from the hot water heating unit 32 is provided at the lower end thereof. Since the outlet 31d to the pressure regulating chamber 30a is provided at the upper end, the liquid LPG and the heated and vaporized gas LPG are separated up and down by the specific gravity difference, and only the gas LPG enters the pressure regulating chamber 30a. Inflow.

本実施の形態のレギュレータ３Ａは以上のような構成であり、電気加熱部３１
が温水加熱部３２の下流側に配置されていることで、低温始動時などエンジン冷却水温度が低い場合に、電気加熱部３１のＰＴＣヒータ板３１ｂの放熱面で加熱されたＬＰＧがエンジン冷却水で冷却されて再液化してしまうことを確実に回避することができる。 The regulator 3A of the present embodiment has the above-described configuration, and the electric heating unit 31
Is arranged on the downstream side of the hot water heating unit 32, so that when the engine cooling water temperature is low, such as at a low temperature start, the LPG heated on the heat radiation surface of the PTC heater plate 31b of the electric heating unit 31 is engine cooling water. It can be reliably avoided that the liquid is cooled and re-liquefied.

また、電気加熱部３１の加熱室３１ｃが縦長であってＬＰＧの流入口３１ａが下端部に流出口３１ｄが上端部に配置されており、ＰＴＣヒータ３１ｂが縦置きに配置され加熱室３１ｃがＰＴＣヒータ３１ｂの放熱面に沿う上下に長い上向きの流路となるため、熱交換の効率が極めて良好となるとともに気体ＬＰＧと液体ＬＰＧとが上下に確実に分離されることになる。従って、レギュレータ３Ａから燃料噴射弁５に送出されるＬＰＧに液体ＬＰＧが混入されることを有効に回避することができるものである。尚、ＰＴＣヒータ３１ｂの複数枚を互いに隙間を設けて並行に縦置き配置してもよく、このようにすることで加熱気化能力が向上し大流量のＬＰＧに対応できるようになる。   Further, the heating chamber 31c of the electric heating unit 31 is vertically long, the LPG inlet 31a is disposed at the lower end, the outlet 31d is disposed at the upper end, the PTC heater 31b is disposed vertically, and the heating chamber 31c is disposed at the PTC. Since the flow path is long and upward along the heat dissipation surface of the heater 31b, the efficiency of heat exchange is extremely good, and the gas LPG and the liquid LPG are reliably separated vertically. Therefore, it is possible to effectively avoid the liquid LPG from being mixed into the LPG delivered from the regulator 3A to the fuel injection valve 5. It should be noted that a plurality of PTC heaters 31b may be vertically arranged in parallel with a gap between them, and in this way, the heating and vaporization ability is improved and it is possible to cope with a large flow rate LPG.

本実施の形態のＬＰＧ用レギュレータが配置された燃料供給システムの配置図。The layout of the fuel supply system by which the regulator for LPG of this Embodiment is arrange | positioned. 図１のレギュレータを拡大した縦断面図。The longitudinal cross-sectional view which expanded the regulator of FIG. 従来のＬＰＧ用レギュレータが配置された燃料供給システムの配置図。The layout of the fuel supply system by which the regulator for conventional LPG is arrange | positioned.

符号の説明Explanation of symbols

３Ａ レギュレータ、 ３０ 調圧部、 ３０ａ 調圧室、 ３１ 電気加熱部、 ３１ａ 流入口、 ３１ｂ ＰＴＣヒータ、 ３１ｃ 加熱室、 ３１ｄ 流出口、 ３２ 温水加熱部、 ３２ａ 加熱室、 ３２ｂ 冷却水通路
3A regulator, 30 pressure adjusting unit, 30a pressure adjusting chamber, 31 electric heating unit, 31a inlet, 31b PTC heater, 31c heating chamber, 31d outlet, 32 hot water heating unit, 32a heating chamber, 32b cooling water passage

Claims (4)

エンジン冷却水を用いる温水加熱手段と電気ヒータを用いる電気加熱手段と調圧室を有する気化ガス調圧手段とを具え、液体ＬＰＧを加熱気化するとともに所定圧力に調整してＬＰＧエンジンの吸気管路に送出するＬＰＧ用レギュレータにおいて、
前記電気加熱手段は、前記温水加熱手段の下流側であって前記調圧室の上流側に配置されている、
ことを特徴とするＬＰＧ用レギュレータ。 A hot water heating means using engine cooling water, an electric heating means using an electric heater, and a vaporized gas pressure regulating means having a pressure regulating chamber are provided to heat and vaporize the liquid LPG and to adjust the pressure to a predetermined pressure, thereby taking the intake pipe of the LPG engine In the LPG regulator sent to
The electric heating means is disposed downstream of the hot water heating means and upstream of the pressure regulating chamber.
LPG regulator characterized by the above. 前記電気加熱手段、温水加熱手段、気化ガス調圧手段の三つが一体化して一個の装置とされていることを特徴とする請求項１に記載したＬＰＧ用レギュレータ。   The LPG regulator according to claim 1, wherein the electric heating means, the hot water heating means, and the vaporized gas pressure adjusting means are integrated into a single device. 前記電気加熱手段は、前記電気ヒータが配置されている加熱室が上下に縦長の空間を有しており、前記加熱室の下端側に前記温水加熱手段からの流入口が設けられ上端側に前記調圧室への流出口が設けられていることを特徴とする請求項１または２に記載したＬＰＧ用レギュレータ。   In the electric heating means, a heating chamber in which the electric heater is disposed has a vertically long space, an inlet from the hot water heating means is provided on the lower end side of the heating chamber, and the upper end side is The LPG regulator according to claim 1 or 2, wherein an outlet to the pressure regulating chamber is provided. 前記電気ヒータはＰＴＣヒータを縦置きに配置したものであることを特徴とする請求項１，２または３に記載したＬＰＧ用レギュレータ。
4. The LPG regulator according to claim 1, 2 or 3, wherein the electric heater is a PTC heater arranged vertically.
JP2004142103A 2004-05-12 2004-05-12 Regulator for lpg Pending JP2005325690A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004142103A JP2005325690A (en) 2004-05-12 2004-05-12 Regulator for lpg
KR1020040101306A KR20050109038A (en) 2004-05-12 2004-12-03 Regulator for lpg

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004142103A JP2005325690A (en) 2004-05-12 2004-05-12 Regulator for lpg

Publications (1)

Publication Number Publication Date
JP2005325690A true JP2005325690A (en) 2005-11-24

Family

ID=35472225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004142103A Pending JP2005325690A (en) 2004-05-12 2004-05-12 Regulator for lpg

Country Status (2)

Country Link
JP (1) JP2005325690A (en)
KR (1) KR20050109038A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010174870A (en) * 2009-02-02 2010-08-12 Keihin Corp Lpg fuel heater

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100830178B1 (en) * 2007-05-04 2008-05-16 주식회사 엘씨글로벌 A fuel vaporization system for liquefied petroleum gas vehicles
KR100890706B1 (en) * 2007-08-29 2009-03-27 콘티넨탈 오토모티브 시스템 주식회사 Apparatus and method for heating pressure controller of cng car
CN103498738B (en) * 2013-10-24 2015-07-08 江南工业集团有限公司 Vehicle liquefied natural gas vaporizer
ITUB20152802A1 (en) 2015-08-03 2017-02-03 Metatronix S R L SYSTEM FOR THE THERMAL CONDITIONING OF A GASEOUS FUEL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010174870A (en) * 2009-02-02 2010-08-12 Keihin Corp Lpg fuel heater

Also Published As

Publication number Publication date
KR20050109038A (en) 2005-11-17

Similar Documents

Publication Publication Date Title
US20080053416A1 (en) Vapor and liquid fuel injection system
JP2010144734A (en) Vehicle-mounted fuel separation device
US8061330B2 (en) Fuel supplying apparatus for gas engine
JP3881569B2 (en) Liquid material vaporizer
JP2005325690A (en) Regulator for lpg
JP4378698B2 (en) Regulator for LPG
JP4199702B2 (en) Heating system for liquefied gas fuel supply system
JP4284591B2 (en) LPG heat exchanger
JP4352377B2 (en) LPG heat exchanger
JP2005214011A (en) Regulator for liquified petroleum gas
JP4345443B2 (en) In-vehicle fuel separation system
WO2001066999A1 (en) Liquefied gas evaporator
WO2002050418A1 (en) Gas fuel feeder of internal combustion engine
JP2006046211A (en) Method and device for supplying lpg fuel to engine
JP2010163909A (en) On-vehicle fuel separation device
JP6058930B2 (en) Fuel supply device for internal combustion engine
JP2002070652A (en) Pressure regulator in liquefied gas feeding device for engine
JP2003328859A (en) Pressure regulator for lpg
JP2004309039A (en) Integral liquefied gas vaporizer
JP2006249981A (en) Reformed gas-utilizing internal combustion engine
JP3690352B2 (en) Combustion equipment
JP5193826B2 (en) Liquid material vaporizer
KR20090121172A (en) Electrical heater of vaporizer
JP4459119B2 (en) Fuel supply system for gas engine
JP4352376B2 (en) Engine liquefied gas fuel supply system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070511

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090804

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20091215