JPS6296769A - Fuel feeder for internl combustion engine - Google Patents
Fuel feeder for internl combustion engineInfo
- Publication number
- JPS6296769A JPS6296769A JP23511285A JP23511285A JPS6296769A JP S6296769 A JPS6296769 A JP S6296769A JP 23511285 A JP23511285 A JP 23511285A JP 23511285 A JP23511285 A JP 23511285A JP S6296769 A JPS6296769 A JP S6296769A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- fuel
- valve
- mixer
- control valve
- 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
Links
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、内燃機関の燃料供給装置に関し、特にガソ
リンなどの液体燃料と、液化石油ガスなどの気体燃料と
を適宜切換えて使用する内燃機関の燃料供給装置に関す
る。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a fuel supply system for an internal combustion engine, and in particular to an internal combustion engine that uses liquid fuel such as gasoline and gaseous fuel such as liquefied petroleum gas by appropriately switching between them. The present invention relates to a fuel supply device.
（従来の技術）
石油資源の枯渇化などにより、近時の内燃機関では燃料
が多様化する傾向にあって、例えばガソリンなどの液体
燃料と、液化石油ガス（Ｌ、Ｐ。(Prior Art) Due to the depletion of petroleum resources, modern internal combustion engines tend to use more diverse fuels, such as liquid fuels such as gasoline and liquefied petroleum gases (L, P, etc.).
Ｇ）などの気体燃料とを適宜切換えて用いるものが提供
されている。Gaseous fuels such as G) and the like are provided.
この種の内燃機関では、一般的には液体燃料を混合霧化
させるだめの気化器と、気体燃料と吸入空気とを混合す
るミキサー（混合器）とを吸気通路に併設しており、特
に燃料の切換時に技術的課題があった。In this type of internal combustion engine, a vaporizer that mixes and atomizes liquid fuel and a mixer that mixes gaseous fuel and intake air are generally installed in the intake passage. There were technical issues when switching.
すなわち、燃料を切換える際には、二種類の燃料が重複
して供給されると、無駄な燃料を消費するだけでなく、
内燃機関に供給される混合気が過温化し、内燃は関の運
転に支障を来たす。In other words, when switching fuels, if two types of fuel are supplied redundantly, not only will fuel be wasted;
The air-fuel mixture supplied to the internal combustion engine becomes overheated, and the internal combustion engine becomes inoperable.
つまり、望ましい切換状態は、使用中の一方の燃料がほ
ぼ完全に放出された後に、切換えられた他方の燃料が円
滑に供給されることである。In other words, the desired switching condition is for the one fuel in use to be almost completely discharged before the other fuel being switched to is smoothly supplied.
そこで、このような問題点を解決し、円滑な燃料の切換
えを可能にする燃料供給装置として、例えば特開昭５７
−１８４４６号公報にて開示された装置がある。Therefore, as a fuel supply device that solves these problems and enables smooth fuel switching, for example, Japanese Patent Laid-Open No. 57
There is a device disclosed in Japanese Patent No.-18446.
同号報の燃料供給装置は、燃料供給の重複を避けるため
、いずれか一方の使用状態から他方に切換える際に、切
換えと同時に他方の燃料を直ちに供給せず、所定時間遅
らせて供給することを基本構成とし、その具体的な手段
として、気体燃料の充填された圧力容器と、内燃機関の
供給通路に設けられたミキサーと、これらの間に介装さ
れた調圧装置とからなる気体燃料供給系路を、調圧装置
の２次側とミキ（す−間に設けた制御弁を遅延開閉する
ものが示されている。In order to avoid duplication of fuel supply, the fuel supply system in the same issue requires that when switching from one state of use to the other, the fuel of the other is not immediately supplied at the same time as the switch is made, but is supplied after a predetermined period of time. The basic structure is a gas fuel supply consisting of a pressure vessel filled with gas fuel, a mixer installed in the supply passage of the internal combustion engine, and a pressure regulating device interposed between these. A system is shown in which a control valve provided between the secondary side of the pressure regulating device and the mixer is opened and closed in a delayed manner.
（発明が解決しようとする問題点）
しかしながら、上記公報の燃料供給装置では、調圧装置
の２次側とミキサー間とを制御弁で開閉するために次の
ような欠点があった。(Problems to be Solved by the Invention) However, the fuel supply device disclosed in the above-mentioned publication has the following drawbacks because the connection between the secondary side of the pressure regulating device and the mixer is opened and closed by a control valve.
すなわら、通常この種の装置では、圧力容器に近接して
開閉弁が段（プられていて、調圧装置の両側に弁を設け
ることは経済的ではない。In other words, in this type of device, the on-off valve is usually stacked close to the pressure vessel, and it is not economical to provide valves on both sides of the pressure regulating device.
また、この種の装置〜を搭載した車両は、圧力容器が重
く、これだけで全体が！化している上に、調圧装置とミ
キサー間を接続するバイブは、多量の気体燃料を供給す
るために大径となっており、これを開閉するには大型の
制御弁を必要とする。Also, in vehicles equipped with this type of device, the pressure vessel is heavy, and the entire pressure vessel is heavy! In addition, the vibrator that connects the pressure regulator and the mixer has a large diameter in order to supply a large amount of gaseous fuel, and requires a large control valve to open and close it.
このため、装置全体が大型化し、ざらに車両が重量化す
るという問題があった。For this reason, there is a problem that the entire device becomes larger and the vehicle becomes heavier.
さらに、上記公報の燃料供給装置では、一方の燃料供給
状態から他方の燃料供給状態への切換えの際に、他方の
燃料供給を万延させる所定時間を、切換時の運転状態を
常に監視して変える必要があるため、構造が複雑になる
問題がある。Furthermore, in the fuel supply device of the above-mentioned publication, when switching from one fuel supply state to the other fuel supply state, the predetermined time for delaying the other fuel supply is changed by constantly monitoring the operating state at the time of switching. Because of the necessity, there is a problem that the structure becomes complicated.
この発明はこのような問題点に鑑みてなされたものであ
って、その目的とするころは、装置の大型化を来たすこ
となく、２種類の燃料の円滑な切換が可能となる内燃機
関の燃料供給装置を提供することにある。This invention was made in view of these problems, and its purpose is to provide a fuel for an internal combustion engine that allows smooth switching between two types of fuel without increasing the size of the device. The purpose is to provide a supply device.
（問題点を解決するための手段）
上記目的を達成するため、この発明は内燃機関の吸気通
路に液体燃料供給用の気化器と、気体燃料供給用の混合
器とを併設し、これらを任意に切換える手回を有する燃
料供給装置において、前記気化器のフロート室から吸気
通路への液体燃料を開閉によって供給・停止する制御弁
を備えている。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a vaporizer for supplying liquid fuel and a mixer for supplying gaseous fuel in the intake passage of an internal combustion engine. The fuel supply device has a control valve that supplies and stops liquid fuel from the float chamber of the carburetor to the intake passage by opening and closing.
より具体的には制御弁は気化器のメインノズルから吸気
通路への燃料（Ｉ（給を直接若しくは間接的にあり御す
る。More specifically, the control valve directly or indirectly controls the supply of fuel (I) from the main nozzle of the carburetor to the intake passage.
また、前記混合器と気体燃料が充填された圧力容器との
間に順次圧力を低減づる調圧装置を設けるとともに、こ
の圧力容器と調圧装置との間に前記切換手段と同期して
作動する開閉弁が設けられている。Further, a pressure regulating device is provided between the mixer and the pressure vessel filled with gaseous fuel to sequentially reduce the pressure, and a pressure regulating device is provided between the pressure vessel and the pressure regulating device and operates in synchronization with the switching means. An on-off valve is provided.
さらに、前記混合器と前記調圧装置とを連通ずる気体燃
料供給系路の低圧側の上流側にあって、前記開閉弁に至
るまでの高圧側の圧力が設定値未満のとぎ、上記フロー
ト室から吸気通路に燃料が供給されるように前記制御弁
を作動させる。Furthermore, when the pressure on the high-pressure side up to the on-off valve is lower than a set value on the upstream side of the low-pressure side of the gaseous fuel supply line that communicates the mixer and the pressure regulator, the float chamber The control valve is operated so that fuel is supplied from the air to the intake passage.
この高圧側の圧力は、前記調圧装置の高圧至をＳみ、こ
の装置と前記開閉弁との間の気体燃料供給路内の圧力で
ある。The pressure on the high pressure side is the pressure in the gaseous fuel supply path between the high pressure S of the pressure regulating device and the on-off valve.
（作 用）
上記構成の燃料供給装置では、液体燃料供給用の気化器
を開閉する制御弁を、気体燃料供給系路側の圧力で作動
させるため、例えば気体燃料から液体燃料にＶＪ換えた
場合、ミキサーを介して供給される気体燃料の圧力が設
定値未満にならなければ液体燃料が供給されず、また、
これとは逆に液体燃料から気体燃料に切換えた場合には
、気体燃料側の圧力が供給準備が整う設定値以上になる
」：では、液体燃料の供給は停止されない。(Function) In the fuel supply device having the above configuration, the control valve that opens and closes the vaporizer for liquid fuel supply is operated by the pressure on the side of the gaseous fuel supply system, so for example, when VJ is changed from gaseous fuel to liquid fuel, Liquid fuel is not supplied unless the pressure of the gaseous fuel supplied through the mixer is below a set value, and
On the other hand, when switching from liquid fuel to gaseous fuel, the pressure on the gaseous fuel side becomes equal to or higher than the set value at which supply preparation is completed.Then, the supply of liquid fuel is not stopped.
従って、２種類の燃料が殆ど中復供給されることなく円
滑に切換えられる。Therefore, the two types of fuel can be smoothly switched with almost no intermittent supply.
（実 施 例）
以下、この発明の好適な実施例について添付図面を参照
にして詳細に説明する。(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図は、この発明に係る内燃機関の燃料供給状態の第
１実施例を示している。FIG. 1 shows a first embodiment of a fuel supply state of an internal combustion engine according to the present invention.
同図に示す燃料供給装置は、液体燃料（ガソリン）供給
用の気化器１０と、圧力容器１２内に充填された気体燃
料（ＬＰＧ）を調圧装置１４を介して供給づるミキサー
１６とを内燃は関１８の吸気通路２０に併設している。The fuel supply device shown in the figure has a vaporizer 10 for supplying liquid fuel (gasoline) and a mixer 16 for supplying gaseous fuel (LPG) filled in a pressure vessel 12 via a pressure regulating device 14 for internal combustion. It is attached to the intake passage 20 of the barrier 18.
上記気化器１０は、空気清浄器１９と吸気通路２０との
間に設けられていて、内燃機関１８の負圧により液体燃
料を霧化させるベンチュリ一部２２と、内燃機関１８に
す給される燃料のｉｌｉ＋制御をする較り弁２３と、ベ
ンチュリ一部２２に開口したメインノズル２４と、燃料
タンク２６と燃料フィルター２８および燃料ポンプ３０
を介して流入する液体燃料を常時一定通溜めておくフロ
ート室３２と、フロート室３２とノズル２４とを連通す
る燃料流出通路３３とから構成されていて、メインノズ
ル２４は電気により駆動される電磁弁で構成した制御弁
３４によって直接的に開閉される。The carburetor 10 is provided between an air purifier 19 and an intake passage 20, and includes a venturi portion 22 that atomizes liquid fuel by the negative pressure of the internal combustion engine 18, and a venturi portion 22 that is supplied to the internal combustion engine 18. A comparison valve 23 for controlling fuel ili+, a main nozzle 24 opened to a venturi portion 22, a fuel tank 26, a fuel filter 28, and a fuel pump 30.
The main nozzle 24 is composed of a float chamber 32 that always stores a constant amount of liquid fuel that flows in through the main nozzle 32, and a fuel outflow passage 33 that communicates the float chamber 32 with the nozzle 24. It is directly opened and closed by a control valve 34 composed of a valve.
一方、上記ミキサー１６は、上記ベンチュリ一部２２の
上流側に設けられたチョーク弁３６のさらに上流側にあ
って、上記調圧装置１４の２法学１４ａと低圧パイプ３
８を介して連通接続されていて、２次’Ｊ １４ ａか
ら低圧パイプ３８．ミキサー１６と連なる気体燃料供給
系路の低圧側を形成している。On the other hand, the mixer 16 is located further upstream of the choke valve 36 provided upstream of the venturi portion 22, and is connected to the two valves 14a of the pressure regulator 14 and the low pressure pipe 3.
8 and is connected in communication from the secondary 'J 14 a to the low pressure pipe 38. It forms the low pressure side of the gaseous fuel supply line connected to the mixer 16.
調圧装置１４は、バネ材とダイヤフラムとを主要構成部
材とし、弁機構を介在させて１次室１４ｂ （高圧室）
と２次室１４ａ （低圧室）に隔成されており、１数字
１４ｂ、２次’Ｊ１４ａの順に圧力が低くなるように構
成されている。The pressure regulating device 14 has a spring material and a diaphragm as main components, and a primary chamber 14b (high pressure chamber) with a valve mechanism interposed therebetween.
and a secondary chamber 14a (low pressure chamber), and are configured such that the pressure decreases in the order of 1 digit 14b and secondary 'J14a.
調圧装置の１数字１４ｂは、気体燃料供給用の高圧パイ
プ／ＩＯを介して、上記圧力容器１２と接続され、高圧
パイプ４０の途中にこれを開閉づるカットオフバルブ４
２が介装されてｄ３す、これらで気体燃料供給系路の高
圧側を形成している。A number 14b of the pressure regulating device is connected to the pressure vessel 12 through a high pressure pipe/IO for supplying gaseous fuel, and a cut-off valve 4 is located in the middle of the high pressure pipe 40 to open and close it.
2 and d3 are interposed, and these form the high pressure side of the gaseous fuel supply system.
このカットオフバルブ４２は、従来からこの種の装置に
設けられていたちのであって、本発明の開閉弁を構成し
′Ｃａ５す、バッテリー４４および始動スイッチ４Ｇと
直列接続された切換スイッチ４８によって作動され、切
換スイッチ４８の一方の接点は上記燃料ポンプ３０に接
続されている。This cut-off valve 42 has been conventionally provided in this type of device, constitutes the on-off valve of the present invention, and is operated by a changeover switch 48 connected in series with a battery 44 and a starting switch 4G. One contact of the changeover switch 48 is connected to the fuel pump 30.
また、上記調圧装置１４の１数字１４ｂには、１次ηｉ
１４１）内の圧力が設定値未満になるとオン状態にな
る圧力スイッチ５０が取付けられていて、スイッチ５０
の一方は切換スイッチ４８と始動スイッチ４６間に接続
されるとともに、他方は上記制御弁３／′Ｉの駆動コイ
ルに接続されている。In addition, the single number 14b of the pressure regulating device 14 includes the primary ηi
A pressure switch 50 is installed that turns on when the pressure inside 141) becomes less than a set value, and the switch 50
One side is connected between the changeover switch 48 and the starting switch 46, and the other side is connected to the drive coil of the control valve 3/'I.
以りの構成からなる燃料供給装置では、例えば今内燃（
１関１８が気化器１０を介して供給される液体燃料によ
って駆動させられていて、運転者が切換スイッチ４８を
操作して気体燃料による駆動に切換えると、切換スイッ
チ４８の操作により、燃わ１ポンプ３０が停止するとと
もにカットオフバルブ４２が開放され、圧力容器１２内
の気体燃料ば高圧パイプ４０を通って調圧装置１４内の
１次室１４ｂに流入する。In the fuel supply system having the following configuration, for example, internal combustion (
1 engine 18 is driven by liquid fuel supplied through the vaporizer 10, and when the driver operates the changeover switch 48 to switch to driving by gaseous fuel, the operation of the changeover switch 48 causes the combustion engine 18 to When the pump 30 is stopped, the cutoff valve 42 is opened, and the gaseous fuel in the pressure vessel 12 flows into the primary chamber 14b in the pressure regulator 14 through the high pressure pipe 40.
この状態では、まだメインノズル２４からの液体燃料の
供給は停止されていない。In this state, the supply of liquid fuel from the main nozzle 24 has not yet been stopped.
そして、１数字１４ｂ内の圧力が上昇し設定値以上にな
ると、圧力スイッチ５０がオン状態となって、バッテリ
４１４から始動スイッチ４６を介して圧力スイッチ５０
．制御弁３４に至る回路により、制御弁３４が作動し、
気化器１０のメインノズル２４を閉塞して液体燃料の吸
気通路２０への供給を直らに停止Ｊる。Then, when the pressure inside the number 14b increases and exceeds the set value, the pressure switch 50 is turned on, and the pressure switch 50 is turned on from the battery 414 via the start switch 46.
．． The circuit leading to the control valve 34 causes the control valve 34 to operate;
The main nozzle 24 of the carburetor 10 is closed to immediately stop the supply of liquid fuel to the intake passage 20.
また、圧力スイッチ５０の作動どはぼ同時に、気体燃料
は調圧装置１４の１数字１４ｂから２次室１４ａと流入
し、低圧バイ１３８を介してミキサー１６に至り、空気
清）′ｐ器１９から取込まれたエアーと混合されて吸気
通路２０に供給される。Also, almost at the same time as the pressure switch 50 is activated, gaseous fuel flows into the secondary chamber 14a from the number 14b of the pressure regulator 14, reaches the mixer 16 via the low pressure bypass 138, and air purifier 19. The mixed air is mixed with air taken in from the air and is supplied to the intake passage 20.
従って、この場合には、気体燃料の供給型苗が整えられ
るまでは、気化器１０からの液体燃料を供給していて、
１次Ｙ１４ｂ内の圧力が上界して準（−６が終わるとメ
インノズル２４を閉じて、燃ｒＩの平Ｆｉ供給と供給の
空白期間の発生を防止している。Therefore, in this case, until the gaseous fuel supply type seedlings are prepared, liquid fuel is supplied from the vaporizer 10,
When the pressure in the primary Y14b rises and reaches quasi (-6), the main nozzle 24 is closed to prevent the occurrence of a blank period between the flat Fi supply and the supply of the fuel rI.
一方、気体燃１１の使用中に液体燃料の使用に切換えた
場合には、切換スイッチ７′Ｉ８の操作によりカッ１〜
オフバルブ４２が閉止され、燃料ポンプ３０が始動する
。On the other hand, when switching to the use of liquid fuel while using gaseous fuel 11, the switch 7'I8 can be operated to
Off valve 42 is closed and fuel pump 30 is started.
切換操作によって気化器１０のメインノズル２４を閉止
している制御弁２３は、これにより直ちに開放されず、
ミキサー１６を介して気体燃料が消費され、調圧装置１
４の１送室１４ｂの圧力が降下し、設定値未満になると
圧力スイッチ５０がオフ状態となって制御弁２３の回路
が開放され、その結果、メインノズル２４が開放される
。The control valve 23 that closes the main nozzle 24 of the carburetor 10 by the switching operation is not immediately opened due to this,
Gaseous fuel is consumed via the mixer 16 and the pressure regulator 1
When the pressure in the 4-1 feeding chamber 14b decreases and becomes less than the set value, the pressure switch 50 is turned off, the circuit of the control valve 23 is opened, and as a result, the main nozzle 24 is opened.
これによりメインノズル２４から液体燃料が吸気通路２
０に供給される。As a result, liquid fuel flows from the main nozzle 24 into the intake passage 2.
0.
この場合にも、調圧装置１４の２送室１４ａからミキナ
ー１６に至る気体燃料供給系路中の燃料が放出された後
に、気化器１０のメインノズル２４が開放されるため、
二種類の燃料の重複供給は殆ど生じない。Also in this case, the main nozzle 24 of the carburetor 10 is opened after the fuel in the gaseous fuel supply line from the two feed chambers 14a of the pressure regulator 14 to the mixer 16 is released.
Redundant supply of two types of fuel hardly occurs.
なお、上記実施例の圧力スイッチ５０のバッテリ４４側
の接続点は、第１図中２点鎖線で示すように、切換スイ
ッチ４８と燃料ポンプ３０との間に設けてもよい。Note that the connection point of the pressure switch 50 in the above embodiment on the battery 44 side may be provided between the changeover switch 48 and the fuel pump 30, as shown by the two-dot chain line in FIG.
第２図は、この発明に係る内燃機関の燃料供給装置の第
２実施例を示しており、以下にその特徴点についてのみ
説明する。FIG. 2 shows a second embodiment of the fuel supply system for an internal combustion engine according to the present invention, and only its features will be described below.
すなわち、この実施例では、上記気化器１０のフロート
室３２とメインノズル２４とを連通する吸気通路２０の
上流側に、ベンチュリ一部２２の上流側に開口＋Ｆａ
５２を設けたエアブリード５４を連通形成し、この間口
端５２を上記制御弁３４で開閉し、間接的にメインノズ
ル２４を制御するように構成されている。エアブリード
５４の間口端５２を制御弁３４で閉止すると、上記第１
実施例と同じように、フロート室３２と燃料流出通路３
３を介してメインノズル２４から液体燃料が吸気通路２
０に供給される。That is, in this embodiment, an opening +Fa is provided on the upstream side of the venturi portion 22 on the upstream side of the intake passage 20 that communicates the float chamber 32 of the carburetor 10 and the main nozzle 24.
The main nozzle 24 is indirectly controlled by opening and closing the air bleed 54 provided with the air bleed 52 by the control valve 34. When the front end 52 of the air bleed 54 is closed by the control valve 34, the first
As in the embodiment, the float chamber 32 and the fuel outflow passage 3
Liquid fuel is supplied to the intake passage 2 from the main nozzle 24 via the
0.
一方、エアブリード５４の開口＠ｉ５２が制御弁３４の
作動により開放されると、エアブリード５４がら空気が
メインノズル２４側に流入して、液体燃料の供給が停止
される。On the other hand, when the opening @i52 of the air bleed 54 is opened by the operation of the control valve 34, air flows into the main nozzle 24 through the air bleed 54, and the supply of liquid fuel is stopped.
従って、この実施例では、制御弁３４を作動する圧力ス
イッチ５０は、調圧装置１４の１送室１４ｂの圧力が設
定値未満になるとオン状態となり、また所定の圧力が設
定値以上になるとオフ状態にすれば、上記第１実施例と
同じ作用を秦づる。Therefore, in this embodiment, the pressure switch 50 that operates the control valve 34 is turned on when the pressure in the first feeding chamber 14b of the pressure regulator 14 becomes less than the set value, and turned off when the predetermined pressure exceeds the set value. In this case, the same effect as in the first embodiment can be obtained.
第３図は、この発明に係る内燃機関の燃料供給装置の第
３実施例を示してＪ５す、以下にその特徴点についての
み説明する。FIG. 3 shows a third embodiment of the fuel supply system for an internal combustion engine according to the present invention, and only its features will be described below.
同図に示す第３実施例では、上記第１および第２実施例
が気化器１０のメインノズル２４を、電気的に作動する
制御弁３４で開閉するものであったのに対し、これをバ
ネとダイヤフラムとで構成し、ダイヤフラムの作動室と
上記調圧装置１４の１次掌１４ｂとを１＆続パイプ５６
で連通し、調圧装置１４の１次至１４ｂの圧力で直接制
御弁３４′を作動させている。In the third embodiment shown in the figure, the main nozzle 24 of the carburetor 10 is opened and closed by an electrically operated control valve 34 in the first and second embodiments, whereas this is operated by a spring. and a diaphragm, and the working chamber of the diaphragm and the primary arm 14b of the pressure regulating device 14 are connected to each other by a connecting pipe 56.
The pressure from the primary to 14b of the pressure regulator 14 operates the direct control valve 34'.
この構成においても、制御弁３４−の作動によりメイン
ノズル２４が開閉され、上記実施例と同じ作用が得られ
、液体、気体燃料を重複供給することなく円滑に供給で
きるとともに、この実施例では１送室１４ｂの圧力によ
って作動する圧力スイッチ５０が不要となって、構成が
簡単となり部品点数も削減される。In this configuration as well, the main nozzle 24 is opened and closed by the operation of the control valve 34-, and the same effect as in the above embodiment can be obtained, and liquid and gaseous fuel can be smoothly supplied without redundant supply. The pressure switch 50, which is activated by the pressure in the feeding chamber 14b, is not required, which simplifies the configuration and reduces the number of parts.
なお、上記実施例では気化器１０として、低速ｄ５よび
高速系の複数のベンチュリ一部２２を備えた、いわゆる
収用式のものを例示したが、この発明の実施はこれに限
られるものではなく、通常の単胴式のものであってもよ
い。In the above embodiment, the carburetor 10 is of a so-called expropriation type, which is equipped with a plurality of low-speed d5 and high-speed venturi parts 22, but the implementation of the present invention is not limited to this. It may be a normal single-hulled type.
また、上記第１および第２実施例の圧力スイッチ５０の
設置個所および第３実施例の制御弁３４−のダイヤフラ
ムの作動室と連通させる個所は、調圧装置１４の１送室
１４ｂだけでなく、調圧装置１４の１送室１４ｂとカッ
トオフバルブ４２の間であってもよい。Furthermore, the installation location of the pressure switch 50 in the first and second embodiments and the location that communicates with the operating chamber of the diaphragm of the control valve 34- in the third embodiment are not limited to the first sending chamber 14b of the pressure regulating device 14. , it may be between the first sending chamber 14b of the pressure regulating device 14 and the cut-off valve 42.
（発明の効果）
以上、実ＩＡ例で詳細に説明したように、この発明に係
る内燃機関の燃料供給装置においては、任意に切換えら
れる２種類の燃料を、重複させることなく、しかも空白
期間を発生づることなく円滑に供給できる。(Effects of the Invention) As explained above in detail in the practical IA example, in the fuel supply system for an internal combustion engine according to the present invention, two types of fuel that can be arbitrarily switched can be switched without overlapping and without overlapping the blank period. It can be supplied smoothly without any trouble.
また、気化器からの液体燃料の供給・停止を、気体燃料
供給系路中の開閉弁に至るまでの高圧側圧力で直接ない
しは間接的に行なうため、従来から設けられていた開閉
弁をそのまま有効利用でき、しかも調圧装置の低圧側に
大型の制御弁を設（ブる必要がなく、装置全体の大型化
と車両の重量化も防止される。In addition, the liquid fuel supply from the vaporizer is directly or indirectly controlled by the high-pressure side pressure up to the on-off valve in the gaseous fuel supply line, so the conventional on-off valve can be used as is. Moreover, there is no need to install a large control valve on the low pressure side of the pressure regulating device, which prevents the entire device from becoming larger and the vehicle from becoming heavier.
第１図はこの発明に係る燃料供給装置の第１実施例を示
す全体構成図、第２図は第２実施例を示す要部断面図、
第３図は第３実施例を示す要部断面図である。
１０・・・・・・気化器 １２・・・・・・圧力
容器１４・・・・・・調圧装置 １６・・・・・・
ミキサー１８・・・・・・内燃機関 ２０・・・・
・・吸気通路２４・・・・・・メインノズル ３２・・
・・・・フロート室３４．３／ｌ −・・・制御弁
特許出願人 マツダ 株式会社代 理
人 弁理士・ −色健輔同
弁理士 松本雅利第２図
１ｑ
づど
第３図
ＱFIG. 1 is an overall configuration diagram showing a first embodiment of a fuel supply device according to the present invention, FIG. 2 is a sectional view of main parts showing a second embodiment,
FIG. 3 is a sectional view of a main part showing a third embodiment. 10... Carburizer 12... Pressure vessel 14... Pressure regulator 16...
Mixer 18... Internal combustion engine 20...
...Intake passage 24...Main nozzle 32...
...Float chamber 34.3/l -...Control valve patent applicant Mazda Motor Corporation agent Patent attorney - Kensuke Shiro
Patent Attorney Masatoshi Matsumoto Figure 2 1q Zudo Figure 3 Q
Claims (1)
料供給用の混合器とを併設し、これらを適宜切換える手
段を有する燃料供給装置において、該気化器のフロート
室から該吸気通路への燃料を供給・停止する制御弁と、
該混合器と該気体燃料が充填された圧力容器との間に調
圧装置とを設けるとともに、該圧力容器と該調圧装置と
の間に該切換手段に同期して作動する開閉弁を設け、該
調圧装置と該混合器とを連通する気体燃料供給系路の低
圧側の上流側にあって該開閉弁に至るまでの高圧側の圧
力が設定値未満のとき、該フロート室から吸気通路に燃
料が供給されるように該制御弁を作動させてなることを
特徴とする内燃機関の燃料供給装置。In a fuel supply device that includes a vaporizer for liquid fuel supply and a mixer for gaseous fuel supply in an intake passage of an internal combustion engine, and has a means for appropriately switching between them, A control valve that supplies and stops fuel;
A pressure regulating device is provided between the mixer and the pressure vessel filled with the gaseous fuel, and an on-off valve that operates in synchronization with the switching means is provided between the pressure vessel and the pressure regulating device. , when the pressure on the high-pressure side upstream of the low-pressure side of the gaseous fuel supply line that communicates the pressure regulator and the mixer, up to the on-off valve, is less than the set value, air is taken in from the float chamber. A fuel supply device for an internal combustion engine, characterized in that the control valve is operated so that fuel is supplied to the passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23511285A JPS6296769A (en) | 1985-10-23 | 1985-10-23 | Fuel feeder for internl combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23511285A JPS6296769A (en) | 1985-10-23 | 1985-10-23 | Fuel feeder for internl combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6296769A true JPS6296769A (en) | 1987-05-06 |
Family
ID=16981232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23511285A Pending JPS6296769A (en) | 1985-10-23 | 1985-10-23 | Fuel feeder for internl combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6296769A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2731473A1 (en) * | 1995-03-07 | 1996-09-13 | Peugeot | Starting device for motor vehicle internal combustion engine |
| WO2007061239A1 (en) * | 2005-11-23 | 2007-05-31 | Fujitec Inc. | Gas fuel supply apparatus |
| KR100765259B1 (en) * | 2005-11-23 | 2007-10-09 | 가부시키가이샤 후지텍 | Gas fuel supply apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5718446A (en) * | 1980-07-09 | 1982-01-30 | Hitachi Ltd | Fuel feed device for internal combustion engine |
-
1985
- 1985-10-23 JP JP23511285A patent/JPS6296769A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5718446A (en) * | 1980-07-09 | 1982-01-30 | Hitachi Ltd | Fuel feed device for internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2731473A1 (en) * | 1995-03-07 | 1996-09-13 | Peugeot | Starting device for motor vehicle internal combustion engine |
| WO2007061239A1 (en) * | 2005-11-23 | 2007-05-31 | Fujitec Inc. | Gas fuel supply apparatus |
| KR100765259B1 (en) * | 2005-11-23 | 2007-10-09 | 가부시키가이샤 후지텍 | Gas fuel supply apparatus |
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