JP7482505B2 - Gas fuel supply system for engines - Google Patents

Gas fuel supply system for engines Download PDF

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JP7482505B2
JP7482505B2 JP2020098648A JP2020098648A JP7482505B2 JP 7482505 B2 JP7482505 B2 JP 7482505B2 JP 2020098648 A JP2020098648 A JP 2020098648A JP 2020098648 A JP2020098648 A JP 2020098648A JP 7482505 B2 JP7482505 B2 JP 7482505B2
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pressure
intake passage
regulator
gas fuel
intake
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JP2021191952A (en
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修太郎 會澤
直也 末永
智昭 福岡
努 村上
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Nikki Co Ltd
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Nikki Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0293—Safety devices; Fail-safe measures
    • 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
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0284—Arrangement of multiple injectors or fuel-air mixers per combustion chamber
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Description

本発明は、液体または高圧気体の状態で貯留しているガス燃料を所定圧力の気体にしてエンジンに供給するガス燃料供給装置に関し、殊に、レギュレータと吸気通路側を接続して吸気管圧力を導入する吸気管圧力導入管を備えたエンジンのガス燃料供給装置に関する。 The present invention relates to a gas fuel supply device that converts gas fuel stored in a liquid or high-pressure gas state into gas of a predetermined pressure and supplies it to an engine, and in particular to a gas fuel supply device for an engine that is equipped with an intake manifold pressure introduction pipe that connects a regulator to the intake passage side and introduces intake manifold pressure.

従来、ＬＰＧやＣＮＧなどのガス燃料をエンジンに供給するガス燃料供給装置として、例えば図４に示すように燃料ボンベ１に充填・貯留した高圧のガス燃料を、レギュレータ２で所定圧力に減圧調整しながら燃料フィルタ３、インジェクタ４、燃料配管５を介して吸気通路６に配置したミキサー７からエンジン吸気管（インテークマニフォールド）８を経てエンジン９に供給する方式のものが知られている。 Conventionally, a gas fuel supply device that supplies gas fuel such as LPG or CNG to an engine has been known that, for example, as shown in FIG. 4, supplies high-pressure gas fuel filled and stored in a fuel cylinder 1 through a fuel filter 3, an injector 4, a fuel pipe 5, a mixer 7 arranged in an intake passage 6, and then through an engine intake pipe (intake manifold) 8 to an engine 9 while reducing and adjusting the pressure to a predetermined level using a regulator 2.

また、前記吸気通路６の末端側を構成する前記エンジン吸気管８と前記レギュレータ２との間を、吸気管負圧を導入するための吸気管圧力導入管［ＭＡＰホース（Ｍａｎｉｆｏｌｄ Ａｂｓｏｌｕｔｅ Ｐｒｅｓｓｕｒｅ ｈоｓｅ）］１０で接続することで、吸気管負圧を前記レギュレータ２内に導入して利用する技術も例えば特開２００２－２１６４２号公報などに記載されている。 In addition, a technique is described, for example in JP 2002-21642 A, in which an intake pipe pressure introduction pipe [MAP hose (Manifold Absolute Pressure hose)] 10 is used to introduce intake pipe negative pressure between the engine intake pipe 8, which constitutes the end side of the intake passage 6, and the regulator 2, thereby introducing the intake pipe negative pressure into the regulator 2 and utilizing it.

このように、前記吸気管圧力導入管１０を経由させて前記吸気通路６側で生じた吸気管負圧を前記レギュレータ２内に導入することで、前記エンジン９の運転状況に応じて前記レギュレータ２の制御圧力を補正したり、エンジン停止時に前記レギュレータ２内の一次室と二次室との連通を強制閉弁させてガス燃料の流出を防止したりする機能を実現可能なものとしている。 In this way, by introducing the intake pipe negative pressure generated on the intake passage 6 side into the regulator 2 via the intake pipe pressure introduction pipe 10, it is possible to realize functions such as correcting the control pressure of the regulator 2 according to the operating conditions of the engine 9, and forcibly closing the communication between the primary and secondary chambers in the regulator 2 when the engine is stopped to prevent the outflow of gas fuel.

しかしながら、前記エンジン吸気管８と前記レギュレータ２を前記吸気管圧力導入管１０でそのまま接続した場合、前記吸気通路６側に生じた凝集水等の水分が前記吸気管圧力導入管１０内に侵入し、それが抵抗になって負圧の伝達を妨げる原因になる場合があり、侵入した水分が凝固すると前記吸気管圧力導入管１０を用いた機能が殆ど発揮されなくなってしまうという難点を有している。 However, if the engine intake pipe 8 and the regulator 2 are directly connected by the intake pipe pressure introduction pipe 10, moisture such as condensed water generated on the intake passage 6 side may enter the intake pipe pressure introduction pipe 10, causing resistance and hindering the transmission of negative pressure. If the moisture that has entered solidifies, the function of the intake pipe pressure introduction pipe 10 will be almost completely lost.

このような凝集水の問題は、例えば特開２０１８－２１５１０号公報にも記載されているように、排気の一部をシリンダ内に環流させる排気再循環（ＥＧＲ）装置のＥＧＲガスが露点温度以下になりやすいために吸気通路内で凝集水が頻繁に発生することが知られており、図４に示したエンジンシステムのように、ＥＧＲクーラー１１、ＥＧＲバルブ１２及びそれらの接続配管による排気再循環装置を備えたものにあっては、前記吸気通路６を介して前記吸気管圧力導入管１０内に凝集水が一層侵入しやすい状態となってしまう。 As described in JP 2018-21510 A, for example, the problem of condensed water is known to occur frequently in the intake passage because the EGR gas from an exhaust gas recirculation (EGR) device, which recirculates part of the exhaust gas into the cylinder, tends to drop below the dew point temperature. In an engine system such as the one shown in FIG. 4, which is equipped with an exhaust gas recirculation device consisting of an EGR cooler 11, an EGR valve 12, and their connecting piping, condensed water is more likely to enter the intake pipe pressure introduction pipe 10 via the intake passage 6.

尚、図４中、符号１３はエンジン排気管、符号１４はスロットル、符号１５はターボチャージャー、符号１６はターボチャージャーの吸気通路、符号１７はターボチャージャーの排気通路、符号１８はインタークーラーである。 In FIG. 4, reference numeral 13 denotes an engine exhaust pipe, reference numeral 14 denotes a throttle, reference numeral 15 denotes a turbocharger, reference numeral 16 denotes an intake passage of the turbocharger, reference numeral 17 denotes an exhaust passage of the turbocharger, and reference numeral 18 denotes an intercooler.

特開２００２－２１６４２号公報JP 2002-21642 A 特開２０１８－２１５１０号公報JP 2018-21510 A

本発明は、前記の問題に鑑みてなされたものであり、レギュレータが吸気管圧力導入管で吸気通路側に接続されたガス燃料供給装置について、水分が吸気管圧力導入管に侵入してレギュレータへの吸気管圧力の導入が妨げられるのを防止できるようにすることを課題とする。 The present invention has been made in consideration of the above-mentioned problems, and has an object to prevent moisture from entering the intake pipe pressure introduction pipe and interfering with the introduction of intake pipe pressure to the regulator, in a gas fuel supply device in which a regulator is connected to the intake passage side by an intake pipe pressure introduction pipe.

前記課題を解決するためなされた本発明は、燃料ボンベに充填・貯留した高圧のガス燃料を減圧調整するレギュレータと、吸気通路のスロットルよりも下流位置に前記レギュレータにより減圧したガス燃料を送出するミキサーを備えているとともに排気再循環装置から送出された排気ガスを前記吸気通路における前記スロットルと前記ミキサーとの間に配置した排気ガス導入口から導入して前記ガス燃料に混合する方式のエンジンシステムを備えたエンジンのガス燃料供給装置において、前記レギュレータの受圧部背面に導入するための吸気管圧力導入管の圧力取り出し口を前記吸気通路における前記排気ガス導入口よりも上流で前記スロットルよりも下流の箇所に接続したことを特徴とする。 The present invention, which has been made to solve the above problems, is a gas fuel supply device for an engine equipped with an engine system that includes a regulator that reduces the pressure of high-pressure gas fuel filled and stored in a fuel cylinder, a mixer that delivers the gas fuel reduced in pressure by the regulator to a position downstream of a throttle in an intake passage, and introduces exhaust gas delivered from an exhaust gas recirculation system through an exhaust gas inlet located between the throttle and the mixer in the intake passage and mixes it with the gas fuel, and is characterized in that the pressure outlet of an intake pipe pressure introduction pipe for introducing the gas into the back of the pressure receiving part of the regulator is connected to a location in the intake passage upstream of the exhaust gas inlet and downstream of the throttle.

また、前記課題を解決するためになされたもう一つの発明は、燃料ボンベに充填・貯留した高圧のガス燃料を減圧調整するレギュレータと、上流にターボチャージャーを備えた吸気通路のスロットルよりも下流位置に前記レギュレータにより減圧したガス燃料を送出するミキサーを備えているとともに排気再循環装置から送出された排気ガスを前記吸気通路における前記スロットルと前記ミキサーとの間に配置した排気ガス導入口から導入して前記ガス燃料に混合する方式のエンジンシステムを備えたエンジンのガス燃料供給装置において、前記レギュレータの受圧部背面に導入するための吸気管圧力導入管の圧力取り出し口を前記吸気通路における前記排気ガス導入口よりも上流で且つ前記スロットルよりも上流の箇所に接続したことを特徴とする。 Another invention made to solve the above problem is a gas fuel supply device for an engine equipped with an engine system that includes a regulator that reduces the pressure of high-pressure gas fuel filled and stored in a fuel cylinder, a mixer that delivers the gas fuel reduced in pressure by the regulator downstream of a throttle in an intake passage with a turbocharger upstream, and introduces exhaust gas delivered from an exhaust gas recirculation system through an exhaust gas inlet located between the throttle and the mixer in the intake passage and mixes it with the gas fuel, characterized in that the pressure outlet of an intake pipe pressure introduction pipe for introducing the gas into the back of the pressure receiving part of the regulator is connected to a location upstream of the exhaust gas inlet in the intake passage and upstream of the throttle.

殊に、本発明において、前記吸気管圧力導入管の前記圧力取り出し口が、前記吸気通路
の上方位置に接続されているとともに前記圧力取り出し口の先端が前記吸気通路内に突出している場合には、前記吸気通路の内壁面に滞留している排気凝集水が圧力取り出し口に侵入することを確実に防止することができる。 In particular, in the present invention, when the pressure outlet of the intake manifold pressure introduction pipe is connected to an upper position of the intake passage and the tip of the pressure outlet protrudes into the intake passage, it is possible to reliably prevent exhaust condensed water remaining on the inner wall surface of the intake passage from entering the pressure outlet.

本発明によると、吸気通路とレギュレータが吸気管圧力導入管で接続されたガス燃料供給装置において、水分が吸気管圧力導入管に侵入してレギュレータへの吸気管圧力の導入が妨げられることを有効に防止できるものである。 According to the present invention, in a gas fuel supply device in which an intake passage and a regulator are connected by an intake pipe pressure introduction pipe, it is possible to effectively prevent moisture from entering the intake pipe pressure introduction pipe and interfering with the introduction of intake pipe pressure to the regulator.

本発明の好ましい実施の形態であるガス燃料供給装置の構成を示す配置図である。1 is a layout diagram showing a configuration of a gas fuel supply device according to a preferred embodiment of the present invention. 図１に示した実施の形態における吸気通路への吸気管圧力導入管の圧力取り出し口の接続部を示す一部を切截した拡大部分図である。2 is an enlarged partial view, with a part cut away, showing a connection portion of a pressure outlet port of an intake pipe pressure introduction pipe to an intake passage in the embodiment shown in FIG. 1 . 本発明における異なる実施の形態のガス燃料供給装置の構成を示す配置図である。FIG. 4 is a layout diagram showing a configuration of a gas fuel supply device according to a different embodiment of the present invention. 従来の排気再循環装置を備えたガス燃料供給装置の構成を示す配置図である。FIG. 1 is a layout diagram showing the configuration of a gas fuel supply device equipped with a conventional exhaust gas recirculation device.

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。 Below, we will explain how to implement the present invention with reference to the drawings.

図１は、本発明の好ましい実施の形態であるガス燃料供給装置の構成を示しており、燃料ボンベ１から送出されたＬＰＧやＣＮＧなどの高圧ガス燃料を減圧調整するレギュレータ２と、減圧されて所定圧力の気体となったガス燃料を燃料フィルタ３およびインジェクタ４を介して吸気通路６に送る燃料配管５と、この燃料配管５で送られたガス燃料を空気と混合して前記吸気通路６内に送出するミキサー７を備えている。 Figure 1 shows the configuration of a gas fuel supply device according to a preferred embodiment of the present invention, and includes a regulator 2 that reduces and adjusts the pressure of high-pressure gas fuel such as LPG or CNG delivered from a fuel cylinder 1, a fuel pipe 5 that delivers the reduced-pressure gas fuel to an intake passage 6 via a fuel filter 3 and an injector 4, and a mixer 7 that mixes the gas fuel delivered by the fuel pipe 5 with air and delivers the gas fuel into the intake passage 6.

また、このガス燃料供給装置を備えたエンジンシステムにおいては、エンジン排気管１３と前記吸気通路６との間が、ＥＧＲクーラー１１、ＥＧＲバルブ１２からなる排気再循環（ＥＧＲ）装置を備えた配管で接続されており、エンジン９による排気の一部をＥＧＲガスとして前記吸気通路６側に戻しながら循環させるようになっている。 In addition, in an engine system equipped with this gas fuel supply device, the engine exhaust pipe 13 and the intake passage 6 are connected by piping equipped with an exhaust gas recirculation (EGR) device consisting of an EGR cooler 11 and an EGR valve 12, and a portion of the exhaust gas from the engine 9 is circulated while being returned to the intake passage 6 as EGR gas.

更に、前記レギュレータ２の受圧部背面に導入するための吸気管圧力導入管１０における圧力取り出し口１９を、前記吸気通路６における前記ＥＧＲバルブ１２からのＥＧＲガスを導入する排気ガス導入口２０よりも上流で前記スロットル１４よりも下流の箇所に接続して、レギュレータ２内の大気室（図示せず）に吸気管圧力を導入しながら、エンジン９の運転状況に応じて制御圧力の補正を自動的に行うことができる。 Furthermore, the pressure outlet 19 in the intake pipe pressure introduction pipe 10 for introduction to the rear surface of the pressure-receiving portion of the regulator 2 is connected to a location upstream of the exhaust gas introduction port 20 in the intake passage 6, which introduces EGR gas from the EGR valve 12, and downstream of the throttle 14, so that the control pressure can be automatically corrected according to the operating conditions of the engine 9 while introducing the intake pipe pressure into the atmospheric chamber (not shown) in the regulator 2.

尚、図面中、符号１３はエンジン排気管、符号１５はターボチャージャー、符号１６はターボチャージャーの吸気通路、符号１７はターボチャージャーの排気通路、符号１８はインタークーラーである。 In the drawings, reference numeral 13 denotes an engine exhaust pipe, reference numeral 15 denotes a turbocharger, reference numeral 16 denotes an intake passage of the turbocharger, reference numeral 17 denotes an exhaust passage of the turbocharger, and reference numeral 18 denotes an intercooler.

本実施の形態によると、前記ＥＧＲバルブ１２から送出された水分を含むＥＧＲガスが前記排気ガス導入口２０から前記吸気通路６に入る箇所で凝集水等の水分が生じるが、前記レギュレータ２の受圧部背面に導入するための前記吸気管圧力導入管１０の前記圧力取り出し口１９を、前記吸気通路６における前記ＥＧＲバルブ１２からのＥＧＲガスを導入する前記排気ガス導入口２０よりも上流の箇所に接続したことにより、前記吸気管圧力導入管１０内に水分が侵入することを防止して、前記吸気管圧力導入管１０内に水分が侵入することによる前記レギュレータ２内への圧力導入機能が妨げられてしまうことを確実に防止することができる。 According to this embodiment, moisture such as condensed water is generated at the point where the moisture-containing EGR gas sent out from the EGR valve 12 enters the intake passage 6 from the exhaust gas inlet 20. However, by connecting the pressure outlet 19 of the intake pipe pressure introduction pipe 10 for introducing the EGR gas to the back side of the pressure-receiving portion of the regulator 2 to a point in the intake passage 6 upstream of the exhaust gas inlet 20 for introducing the EGR gas from the EGR valve 12, moisture is prevented from entering the intake pipe pressure introduction pipe 10, and it is possible to reliably prevent moisture from entering the intake pipe pressure introduction pipe 10 and impeding the pressure introduction function into the regulator 2.

また、本実施の形態では、図２に示したように、前記吸気管圧力導入管１０の前記圧力取り出し口１９が前記吸気通路６の上方位置に接続されているとともに前記圧力取り出し口１９の先端が前記吸気通路６内に突出している。 In addition, in this embodiment, as shown in FIG. 2, the pressure outlet 19 of the intake pipe pressure introduction pipe 10 is connected to an upper position of the intake passage 6, and the tip of the pressure outlet 19 protrudes into the intake passage 6.

前記ＥＧＲバルブ１２から送出された水分を含むＥＧＲガスが前記排気ガス導入口２０から前記吸気通路６に入る箇所で生じる凝集水等の水分の多くは前記吸気通路６の下方に溜まるので、凝集水が吸気管圧力導入管１０における前記取出口１９から侵入することがなく、更に、前記圧力取り出し口１９の先端が前記吸気通路６内に突出していることから、前記吸気通路６内壁面に滞留している排気凝集水が前記圧力取り出し口１９から前記吸気管圧力導入管２０に侵入することも確実に防止することができる。 Most of the moisture, such as condensed water, generated when the moisture-containing EGR gas sent from the EGR valve 12 enters the intake passage 6 from the exhaust gas inlet 20 accumulates below the intake passage 6, so the condensed water does not enter through the outlet 19 of the intake pipe pressure introduction pipe 10. Furthermore, because the tip of the pressure outlet 19 protrudes into the intake passage 6, it is possible to reliably prevent exhaust condensed water remaining on the inner wall surface of the intake passage 6 from entering the intake pipe pressure introduction pipe 20 through the pressure outlet 19.

図３は本発明の異なる実施の形態を示すものであり、基本的に前記図１に示した実施の形態と同様であるが、前記レギュレータ２の受圧部背面に導入するための前記吸気管圧力導入管１０の前記圧力取り出し口１９を前記吸気通路６における前記排気ガス導入口２０よりも上流で且つ前記スロットル１４よりも上流の箇所に接続した点が異なる。 Figure 3 shows a different embodiment of the present invention, which is basically the same as the embodiment shown in Figure 1, except that the pressure outlet 19 of the intake pipe pressure introduction pipe 10 for introduction to the rear surface of the pressure receiving part of the regulator 2 is connected to a location in the intake passage 6 upstream of the exhaust gas introduction port 20 and upstream of the throttle 14.

本実施の形態によると、前記図１に示した実施の形態と同様に前記レギュレータ２の受圧部背面に導入するための前記吸気管圧力導入管１０の前記圧力取り出し口１９を前記吸気通路６における前記排気ガス導入口２０よりも上流に接続しただけでなく、前記吸気管圧力導入管１０の前記圧力取り出し口１９を前記吸気通路６における前記スロットル１４の上流に移動したことにより、前記ＥＧＲバルブ１２から送出された水分を含むＥＧＲガスが前記排気ガス導入口２０から前記吸気通路６に入る箇所で凝集水等の水分が前記スロットル１４により遮蔽されて、更に前記吸気管圧力導入管１０内に水分が侵入することを防止するため、前記吸気管圧力導入管１０内に水分が侵入することによる前記レギュレータ２内への圧力導入機能が妨げられてしまうことを、更に確実に防止することができる。 According to this embodiment, similarly to the embodiment shown in FIG. 1, the pressure outlet 19 of the intake pipe pressure introduction pipe 10 for introduction to the rear surface of the pressure receiving portion of the regulator 2 is connected upstream of the exhaust gas inlet 20 in the intake passage 6, and the pressure outlet 19 of the intake pipe pressure introduction pipe 10 is moved upstream of the throttle 14 in the intake passage 6. As a result, moisture such as condensed water is blocked by the throttle 14 at the point where the moisture-containing EGR gas sent from the EGR valve 12 enters the intake passage 6 from the exhaust gas inlet 20, and further moisture is prevented from entering the intake pipe pressure introduction pipe 10. Therefore, it is possible to more reliably prevent the pressure introduction function into the regulator 2 from being hindered due to moisture entering the intake pipe pressure introduction pipe 10.

燃料ボンベ、２ レギュレータ、３ 燃料フィルタ、４ インジェクタ、５ 燃料配管、６ 吸気通路、７ ミキサー、８ エンジン吸気管、９ エンジン、１０ 吸気管圧力導入管、１１ ＥＧＲクーラー、１２ ＥＧＲバルブ、１３ エンジン排気管、１４ スロットル、１５ ターボチャージャー、１６ 吸気通路、１７ 排気通路、１８ インタークーラー、１９ 圧力取り出し口、２０ 吸気管圧力導入管 Fuel bottle, 2 Regulator, 3 Fuel filter, 4 Injector, 5 Fuel pipe, 6 Intake passage, 7 Mixer, 8 Engine intake pipe, 9 Engine, 10 Intake pipe pressure introduction pipe, 11 EGR cooler, 12 EGR valve, 13 Engine exhaust pipe, 14 Throttle, 15 Turbocharger, 16 Intake passage, 17 Exhaust passage, 18 Intercooler, 19 Pressure outlet, 20 Intake pipe pressure introduction pipe

Claims (3)

燃料ボンベに充填・貯留した高圧のガス燃料を減圧調整するレギュレータと、吸気通路のスロットルよりも下流位置に前記レギュレータにより減圧したガス燃料を送出するミキサーを備えているとともに排気再循環装置から送出された排気ガスを前記吸気通路の前記スロットルと前記ミキサーとの間に配置した排気ガス導入口から導入して前記ガス燃料に混合する方式のエンジンシステムを備えたエンジンのガス燃料供給装置において、前記レギュレータの受圧部背面に導入するための吸気管圧力導入管の圧力取り出し口を前記吸気通路における前記排気ガス導入口よりも上流で前記スロットルよりも下流の箇所に接続したことを特徴とするガス燃料供給装置。 A gas fuel supply device for an engine having an engine system that includes a regulator that reduces the pressure of high-pressure gas fuel filled and stored in a fuel cylinder, a mixer that delivers the gas fuel reduced in pressure by the regulator to a position downstream of a throttle in an intake passage, and introduces exhaust gas delivered from an exhaust gas recirculation device through an exhaust gas inlet located between the throttle in the intake passage and the mixer and mixes it with the gas fuel, the gas fuel supply device being characterized in that the pressure outlet of an intake pipe pressure introduction pipe for introducing the gas into the back of the pressure receiving part of the regulator is connected to a position in the intake passage upstream of the exhaust gas inlet and downstream of the throttle. 燃料ボンベに充填・貯留した高圧のガス燃料を減圧調整するレギュレータと、上流にターボチャージャーを備えた吸気通路のスロットルよりも下流位置に前記レギュレータにより減圧したガス燃料を送出するミキサーを備えているとともに排気再循環装置から送出された排気ガスを前記吸気通路のスロットルとミキサーとの間に配置した排気ガス導入口から導入して前記ガス燃料に混合する方式のエンジンシステムを備えたエンジンのガス燃料供給装置において、前記レギュレータの受圧部背面に導入するための吸気管圧力導入管の圧力取り出し口を前記吸気通路における前記排気ガス導入口よりも上流で且つ前記スロットルよりも上流の箇所に接続したことを特徴とするガス燃料供給装置。 A gas fuel supply device for an engine having an engine system that includes a regulator that reduces the pressure of high-pressure gas fuel filled and stored in a fuel cylinder, a mixer that delivers the gas fuel reduced in pressure by the regulator downstream of a throttle in an intake passage with a turbocharger upstream, and introduces exhaust gas delivered from an exhaust gas recirculation device through an exhaust gas inlet located between the throttle in the intake passage and the mixer and mixes it with the gas fuel, the gas fuel supply device being characterized in that the pressure outlet of an intake pipe pressure introduction pipe for introducing the gas into the back of the pressure receiving part of the regulator is connected to a location upstream of the exhaust gas inlet in the intake passage and upstream of the throttle. 前記吸気管圧力導入管の前記圧力取り出し口が、前記吸気通路の上方位置に接続されているとともに前記圧力取り出し口の先端が前記吸気通路内に突出していることを特徴とする請求項１または２記載のガス燃料供給装置。 The gas fuel supply device according to claim 1 or 2, characterized in that the pressure outlet of the intake pipe pressure introduction pipe is connected to an upper position of the intake passage and the tip of the pressure outlet protrudes into the intake passage.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002021642A (en) 2000-07-11 2002-01-23 Nikki Co Ltd Fuel gas feeder for engine
JP2002221037A (en) 2001-01-22 2002-08-09 Toyota Motor Corp Cylinder injection type gas fuel internal combustion engine
JP2003027989A (en) 2001-07-13 2003-01-29 Toyota Motor Corp Internal combustion engine fuel supply system control method and control system
US20120085322A1 (en) 2010-10-12 2012-04-12 Alfred Trzmiel Internal Combustion Engine as well as Retrofitting/Conversion Kit for such an Internal Combustion Engine
JP2018021510A (en) 2016-08-03 2018-02-08 日野自動車株式会社 Condensed water suppression device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002021642A (en) 2000-07-11 2002-01-23 Nikki Co Ltd Fuel gas feeder for engine
JP2002221037A (en) 2001-01-22 2002-08-09 Toyota Motor Corp Cylinder injection type gas fuel internal combustion engine
JP2003027989A (en) 2001-07-13 2003-01-29 Toyota Motor Corp Internal combustion engine fuel supply system control method and control system
US20120085322A1 (en) 2010-10-12 2012-04-12 Alfred Trzmiel Internal Combustion Engine as well as Retrofitting/Conversion Kit for such an Internal Combustion Engine
JP2018021510A (en) 2016-08-03 2018-02-08 日野自動車株式会社 Condensed water suppression device

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