JPS6193262A - Liquefied gas supply device in engine - Google Patents

Liquefied gas supply device in engine

Info

Publication number
JPS6193262A
JPS6193262A JP59214018A JP21401884A JPS6193262A JP S6193262 A JPS6193262 A JP S6193262A JP 59214018 A JP59214018 A JP 59214018A JP 21401884 A JP21401884 A JP 21401884A JP S6193262 A JPS6193262 A JP S6193262A
Authority
JP
Japan
Prior art keywords
valve
passage
idle
fuel
engine
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
JP59214018A
Other languages
Japanese (ja)
Inventor
Yoshiaki Nishi
西　義秋
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
Nippon Carburetor 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 Nippon Carburetor Co Ltd filed Critical Nippon Carburetor Co Ltd
Priority to JP59214018A priority Critical patent/JPS6193262A/en
Publication of JPS6193262A publication Critical patent/JPS6193262A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M21/0203—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
    • 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
    • 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

Landscapes

  • 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)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PURPOSE:To ensure the supply of fuel upon idle-up, by communicating a vaporizer with idle and main fuel passages so that the main fuel passage is also opened when a control valve disposed in an idle passage bypassing a throttle valve is opened. CONSTITUTION:Liquefied gas which is vaporized in a vaporizer 2 is mixed with fuel from an idle fuel passage 6 opened downstream of a throttle valve 12 and fuel from a main fuel supply passage 10 opened to a venturi section. Upon full-closing of the throttle valve then a valve 17 communicates a vacuum passage 19 with a chamber 20 in a diaphragm 22 by means of a switch 16, to close a valve 21 so that fuel is fed only from the idle fuel passage 9. However, when a switch 29 is closed to open a passage 14 bypassing the throttle valve 12 upon operation of a cooler or the like, a switch 28 is also closed to change over the valve 17 for introduction of the atmospheric air. Further, fuel is fed from the main fuel passage 10 to ensure the idle-up of the engine.

Description

【発明の詳細な説明】[Detailed description of the invention]

産業上の利用分野 本発明はＬＰＧのような液化ガスをベーパライザで減圧
ガス化し、この減圧された燃料ガスを混合器で空気と混
合しエンジンに供給する液化ガス供給装置に関するもの
である。 従来の技術 液化ガスをエンジンに供給する装置は八本的にはベーパ
ライザと混合器とを具えて層り。 空燃比をエンジンの状態に応じて制御する手段が設けら
れている。 第２図はその一つでろって、耐圧容器３１の液化ガスを
減圧ガス化するベーパライザ３２の一次室３３と吸気系
３５の吸気マニホルド３６とをねじ付き調整弁３７．遮
断用電磁弁３８を有するアイドル燃料通路３９で接続す
るとともに、ベーパライザ３２の二次室３４と吸気系３
５の混合器４１とを主燃料通路４０で接続し、更に混合
器４１の絞り弁４２をバイパスさせてアイドルアップ用
電磁弁４３を有するアイドル調整通路４４を設け、絞り
弁４２によって作動するリミットスイッチ４６で制御さ
れる切換弁４７な経て導入される大気またはエンジン吸
入負圧で主燃料通路４０の開閉弁４５を駆動するように
ｔINDUSTRIAL APPLICATION FIELD The present invention relates to a liquefied gas supply device that gasifies liquefied gas such as LPG under reduced pressure using a vaporizer, mixes the reduced pressure fuel gas with air in a mixer, and supplies the mixture to an engine. Conventional technology A device for supplying liquefied gas to an engine consists of eight layers, including a vaporizer and a mixer. Means is provided for controlling the air-fuel ratio in response to engine conditions. FIG. 2 shows one of them, which connects the primary chamber 33 of a vaporizer 32 that converts liquefied gas in a pressure-resistant container 31 into gasified gas under reduced pressure, and the intake manifold 36 of an intake system 35 with a threaded regulating valve 37. It is connected by an idle fuel passage 39 having a solenoid valve 38 for shutoff, and is connected to the secondary chamber 34 of the vaporizer 32 and the intake system 3.
The main fuel passage 40 connects the mixer 41 of No. 5 to the mixer 41 of the mixer 41 through the main fuel passage 40, and further bypasses the throttle valve 42 of the mixer 41 to provide an idle adjustment passage 44 having an idle-up solenoid valve 43, and a limit switch operated by the throttle valve 42. The on-off valve 45 of the main fuel passage 40 is driven by atmospheric air or engine suction negative pressure introduced through the switching valve 47 controlled by the switching valve 46.

【っている、エンジンのアイドリング時は開閉弁４５
にエンジン吸入負圧が作用して主燃料通路４０を閉じて
いるので燃料ガスはアイドルｇ料ｊＩｎ路３９のみから
エンジンに供給される。酸１２弁４２が開かれはじめる
とリミットスイッチ４６が作動し開閉弁４５に大気圧が
作用して主燃料通路４０を開くので燃料ガスは混合器４
１のベンチュリ４８に開口した主ノズルから吸気系３５
に送出されるようＫなる。エンジンが停止すると遮断用
電磁弁３８が作動してアイドル燃料通路３９を遮断する
とともにベーパライザ３２に内蔵されたロック機構が動
いて主燃料通路４０への燃料ガスの流出を停止する。 発明が解決しようとする問題点 前記第２図のよ５な構成の液化ガス供給装置によると、
アイドリング時に自動車の冷房装ジ、前照灯など電気負
荷を発生する機器類が動作して電磁駆動のアイドル調整
弁４３がアイドル調整通路４４を開いたとぎ、主燃料通
路４０が閉じていてアイドル燃料通路３９のみから燃料
ガスが吸気系３５に送出されているため。 絞り弁４２をバイパスして流れる空気によって混合気が
薄くなりエンジンの回転低下や停止を招くことがあった
。 本発明はペーパライザから吸気系へ燃料ガスを送るアイ
ドル燃料通路および主燃料通路と、アイドリング時に主
燃料通路を閉じる開閉弁と、絞り弁をバイパスして吸気
系圧設けられアイドル調整弁によって開閉されるアイド
ル調整通路とケ具えたエンジンの液化ガス供給装置にお
いて、前記アイドル調整弁が開弁したとき前記開閉弁が
連動して開弁する構成としたことによって前記問題点を
解決するための手段とした。 本発明を第１図に示す実施例にへいて説明すると、耐圧
容器ｌの液化ガスを減圧ガス化するベーパライザ２の一
次室３と吸気系５の吸気マニホルド６とがねじ付き調整
弁７．電磁駆動の遮断弁８を有するアイドル燃料通路９
で接続されているとともに、ペーパライザ２の二次室４
と吸気糸５の混合器１１とが開閉弁１５を有する主燃料
通路１０で接続されている。 また、混合器１１の絞り弁１２をバイパスして電磁駆動
のアイドル調整弁１３を有するアイドル調整通路１４が
設けられている。 開閉弁１５は吸気系５の絞り弁１２の下流＋１１１１と
電磁駆動の切換弁１７を有する負、圧通路１９で接続さ
れた負王室２Ｇ、中央に弁体２１を固着したダイヤフラ
ム２２．戻しばね２３および弁座２４を有し、エンジン
の吸入負圧が負圧９２０［導入されると弁体２１が弁座
２４に密着して主燃料通路１０を閉じるようＶｃｔ【つ
ている。 切換弁１７はティド１１ング時に吸気糸５と負圧室２０
とを連通し、無負荷乃至低負荷運転以後は負王室２０を
大気に開放するもので、絞り弁１２と一体に回動できる
レバー２５に接近させて投機したリミットスイッチ１６
にレバー２５カ絞り弁１２の開きはじめに梓触したと欠
切換弁１７が負圧室２０と大気とを連ユ４するように動
作する。 アイドル調整弁１３に駆ｖｌ電流を供給する電気回路２
６（（は電１Ｈ２７，ｌＪレースイツチ２８のコイル、
電気負荷を発生する機４塙と連動する開閉スイッチ２９
が設けられ、また切換弁１７にリミットスイッチ１６と
は別に駆動′α流を供給する電気回路３０［前記リレー
スイッチ２８が設けられている。 このような構成の本実施例罠よると、エンジンのアイド
リング時に開閉弁１５は主燃料通路１０を閉じているの
でねじ付き調整弁７で流量を調整芒れた低速燃料のみが
アイドル燃料通路９を通って吸気系５に送出される。こ
のアイド１１ング時において自動車の冷房装置。 ）ｔＴ照灯なとの′１１℃気色電気発生する→２：÷類
を動作させると開閉スイッチ２９が電気回路２６を閉成
してアイドル調整弁１３を開弁さセ、これと同時Ｋ　１
７レースイツチ２８が電気回路３０を閉成して切換弁１
７を動作させ開閉弁１５ｔｆ開弁させる。このため、ア
イドル調整通路】４を通って空気がエンジンに吸込まれ
るとともに主燃料通路１０を通って燃料が送出されるよ
うになる。 発明の効果 以上の説明から＋１！解されるように２本発明によると
アイドル調整通路を空気が流れるとき主燃料通路からも
燃料が送出されるようになるので、アイドリング時に電
気負荷を発生する機器類が動作しても所要空燃比の混合
気が大量にエンジンに供給され１回転低下や停止を招く
ことなく安定したアイドリングが行われるものである。[When the engine is idling, the on-off valve 45
Since engine suction negative pressure acts on the main fuel passage 40 to close the main fuel passage 40, fuel gas is supplied to the engine only from the idle g-fuel passage 39. When the acid 12 valve 42 starts to open, the limit switch 46 is activated and atmospheric pressure acts on the on-off valve 45 to open the main fuel passage 40, so that the fuel gas flows into the mixer 4.
Intake system 35 from the main nozzle opened to venturi 48 of 1
K so that it is sent out. When the engine is stopped, the shutoff solenoid valve 38 operates to shut off the idle fuel passage 39, and the locking mechanism built into the vaporizer 32 operates to stop the flow of fuel gas into the main fuel passage 40. Problems to be Solved by the Invention According to the liquefied gas supply device having the five configurations shown in FIG.
When the vehicle's cooling system, headlights, and other devices that generate electrical loads operate during idling and the electromagnetically driven idle adjustment valve 43 opens the idle adjustment passage 44, the main fuel passage 40 is closed and the idle fuel is This is because fuel gas is sent to the intake system 35 only from the passage 39. The air flowing bypassing the throttle valve 42 may thin the air-fuel mixture, resulting in a reduction in engine speed or a stoppage of the engine. The present invention includes an idle fuel passage and a main fuel passage that send fuel gas from a paperizer to the intake system, an on-off valve that closes the main fuel passage during idling, and an intake system pressure that bypasses the throttle valve and is opened and closed by an idle adjustment valve. In a liquefied gas supply system for an engine, which is equipped with an idle adjustment passage, the on-off valve is opened in conjunction with the opening of the idle adjustment valve, thereby solving the above problem. . The present invention will be explained with reference to the embodiment shown in FIG. 1. The primary chamber 3 of the vaporizer 2, which gasifies the liquefied gas in the pressure-resistant container 1 under reduced pressure, and the intake manifold 6 of the intake system 5 are connected to a threaded regulating valve 7. Idle fuel passage 9 with electromagnetically driven shutoff valve 8
and is connected to the secondary chamber 4 of the paper riser 2.
and a mixer 11 of the intake line 5 are connected through a main fuel passage 10 having an on-off valve 15. Further, an idle adjustment passage 14 is provided which bypasses the throttle valve 12 of the mixer 11 and has an electromagnetically driven idle adjustment valve 13. The on-off valve 15 is connected to the downstream side 1111 of the throttle valve 12 of the intake system 5 through a negative pressure passage 19 having an electromagnetically driven switching valve 17, and a diaphragm 22. It has a return spring 23 and a valve seat 24, and is arranged so that when the engine intake negative pressure is introduced into the negative pressure 920, the valve body 21 comes into close contact with the valve seat 24 and closes the main fuel passage 10. The switching valve 17 connects the suction line 5 and the negative pressure chamber 20 during
The limit switch 16 is placed close to a lever 25 that can be rotated together with the throttle valve 12, and is connected to the limit switch 16 to open the negative royalties 20 to the atmosphere after no-load or low-load operation.
When the lever 25 touches the throttle valve 12 at the beginning of opening, the disconnection valve 17 operates to connect the negative pressure chamber 20 to the atmosphere. Electric circuit 2 that supplies driving voltage current to the idle adjustment valve 13
6 ((Electronic 1H27, lJ race switch 28 coil,
Opening/closing switch 29 linked to the machine 4 that generates electrical load
In addition to the limit switch 16, the switching valve 17 is provided with an electric circuit 30 (the relay switch 28 is also provided) for supplying the driving 'α flow. According to this embodiment having such a configuration, when the engine is idling, the on-off valve 15 closes the main fuel passage 10, so that only the low-speed fuel whose flow rate is adjusted by the threaded regulating valve 7 flows through the idle fuel passage 9. and is sent to the intake system 5. During this idling time, the air conditioning system of the automobile. ) When the T light is turned on, electricity is generated at 11℃ → 2: When ÷ is operated, the on/off switch 29 closes the electric circuit 26 and opens the idle adjustment valve 13, and at the same time K 1
7 Race switch 28 closes electric circuit 30 and switches valve 1
7 to open the on-off valve 15tf. Therefore, air is drawn into the engine through the idle adjustment passage 4 and fuel is delivered through the main fuel passage 10. +1 from the explanation beyond the effects of the invention! As can be understood, according to the present invention, when air flows through the idle adjustment passage, fuel is also sent out from the main fuel passage, so even if equipment that generates electrical loads operates during idling, the required air-fuel ratio remains unchanged. A large amount of air-fuel mixture is supplied to the engine, allowing stable idling without causing a rotation drop or stopping.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の実施例の構成図、第２図は従来例の構
成図である。 ２・・・・・・ベーパライザ、５・・・・・・吸気系、
９・・・・・アイドル燃料通路、１０・・・・・主燃料
通路、１１・・・・・混合器、１２・・・・・・絞り弁
、１３・・・・・・アイドルび１整弁、１４・・・・・
・アイドル調整通路、ｔＳ・・・・−・開閉弁、１７・
・・・切頃弁、２８・・・・・リレースイッチ。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. 2... Vaporizer, 5... Intake system,
9: Idle fuel passage, 10: Main fuel passage, 11: Mixer, 12: Throttle valve, 13: Idle adjustment Valve, 14...
・Idle adjustment passage, tS...--Opening/closing valve, 17.
...Cut valve, 28...Relay switch.

Claims (1)

【特許請求の範囲】 ベーパライザから吸気系へ燃料ガスを送る アイドル燃料通路および主燃料通路と、アイドリング時
に主燃料通路を閉じる開閉弁と、絞り弁をバイパスして
吸気系に設けられアイドル調整弁によつて開閉されるア
イドル調整通路とを具えたエンジンの液化ガス供給装置
において、前記アイドル調整弁が開弁したとき前記開閉
弁が連動して開弁するように構成したことを特徴とする
液化ガス供給装置。[Claims] An idle fuel passage and a main fuel passage that send fuel gas from the vaporizer to the intake system, an on-off valve that closes the main fuel passage during idling, and an idle adjustment valve that is provided in the intake system bypassing the throttle valve. A liquefied gas supply device for an engine comprising an idle adjustment passage that is opened and closed by the engine, characterized in that when the idle adjustment valve opens, the opening/closing valve opens in conjunction with the idle adjustment valve. Feeding device.
JP59214018A 1984-10-12 1984-10-12 Liquefied gas supply device in engine Pending JPS6193262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59214018A JPS6193262A (en) 1984-10-12 1984-10-12 Liquefied gas supply device in engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59214018A JPS6193262A (en) 1984-10-12 1984-10-12 Liquefied gas supply device in engine

Publications (1)

Publication Number Publication Date
JPS6193262A true JPS6193262A (en) 1986-05-12

Family

ID=16648908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59214018A Pending JPS6193262A (en) 1984-10-12 1984-10-12 Liquefied gas supply device in engine

Country Status (1)

Country Link
JP (1) JPS6193262A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009516119A (en) * 2005-11-15 2009-04-16 シュエン、ウェイチー Electronically controlled fuel-saving clutch device for vehicles
CN103133186A (en) * 2011-11-29 2013-06-05 本田技研工业株式会社 Fuel supply system for gas engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009516119A (en) * 2005-11-15 2009-04-16 シュエン、ウェイチー Electronically controlled fuel-saving clutch device for vehicles
US7901322B2 (en) 2005-11-15 2011-03-08 Waikei Huen Electronic control fuel save clutch device for vehicle
JP4871958B2 (en) * 2005-11-15 2012-02-08 シュエン、ウェイチー Electronically controlled fuel-saving clutch device for vehicles
CN103133186A (en) * 2011-11-29 2013-06-05 本田技研工业株式会社 Fuel supply system for gas engine

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