JPS6221733Y2 - - Google Patents
Info
- Publication number
- JPS6221733Y2 JPS6221733Y2 JP1982035497U JP3549782U JPS6221733Y2 JP S6221733 Y2 JPS6221733 Y2 JP S6221733Y2 JP 1982035497 U JP1982035497 U JP 1982035497U JP 3549782 U JP3549782 U JP 3549782U JP S6221733 Y2 JPS6221733 Y2 JP S6221733Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- slow speed
- throttle
- speed fuel
- path
- 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.)
- Expired
Links
- 239000000446 fuel Substances 0.000 claims description 94
- 230000006837 decompression Effects 0.000 claims description 18
- 241000234435 Lilium Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【考案の詳細な説明】
本考案はLPG気化装置における軽中負荷運転時
の最適な燃料供給を得るための緩速用燃料供給装
置に関するものである。[Detailed Description of the Invention] The present invention relates to a slow speed fuel supply device for obtaining an optimal fuel supply during light and medium load operation in an LPG vaporizer.
従来の１次減圧室より緩速用燃料を取り出すも
のにおいては、アイドルセツト時の燃料量、すな
わち緩速用燃料量の変化によつて、軽中負荷時の
空燃比も変化する欠点が有り、そのため、オート
マチツクミツシヨン付、パワーステアリング付、
エアコン付等によつてアイドルセツトすなわち緩
速用燃料量を変化させた場合、軽中負荷域の空燃
比特性をも変化させてしまい、車両走行のフイー
リングあるいは、エミツシヨン等に悪影響を及ぼ
す。この対策として従来、レギユレータ２次減圧
室の作動設定圧力を変えるようにしているが、そ
の調整には非常に時間がかかつた。 Conventional systems that take out fuel for slow speed from the primary decompression chamber have the disadvantage that the air-fuel ratio at light and medium loads changes depending on the amount of fuel at idle set, that is, the amount of fuel for slow speed. Therefore, it is equipped with automatic transmission, power steering,
If the idle set, that is, the amount of fuel for slow speed is changed by installing an air conditioner, etc., the air-fuel ratio characteristics in the light to medium load range will also be changed, which will have a negative effect on the driving feeling of the vehicle, emission, etc. Conventionally, a countermeasure against this problem was to change the operating pressure setting of the regulator's secondary pressure reduction chamber, but this adjustment took a very long time.
そこで本考案は、これらの問題を解決すること
を目的とするもので、すなわち、１次減圧室１と
２次減圧室２を有し、２次減圧室２に主燃料路４
を設け、１次減圧室に緩速用燃料路９を設け、上
記緩速用燃料路９を２本の供給路に分岐して混合
器側へ連通するようにしたものにおいて、上記分
岐した２本の供給路にそれぞれ緩速用燃料絞り１
０、１１を設け、且つ上記一方の供給路に設けた
緩速用燃料絞り１０を始動、アイドル、軽中負荷
時の燃料制御用とし、他方の供給路に設けた緩速
用燃料絞り１１を軽中負荷時の燃料制御用とし
て、上記絞り１０を有する供給路と絞り１１を有
する供給路とをそれぞれ独立した緩速燃料供給路
となし、更に上記２本の緩速燃料供給路を交互に
開閉する切替バルブを設け、これをスロツトルバ
ルブの開度に関連して作動させるようにしたこと
を特徴とするものである。 Therefore, the present invention aims to solve these problems, that is, it has a primary decompression chamber 1 and a secondary decompression chamber 2, and the secondary decompression chamber 2 has a main fuel path 4.
, a slow speed fuel path 9 is provided in the primary decompression chamber, and the slow speed fuel path 9 is branched into two supply paths that communicate with the mixer side. Slow speed fuel throttle 1 in each supply path
0 and 11, and the slow speed fuel throttle 10 provided on one of the supply channels is used for fuel control during starting, idling, and light and medium loads, and the slow speed fuel throttle 11 provided on the other supply channel is used for fuel control during starting, idling, and light and medium loads. For fuel control during light and medium loads, the supply path with the throttle 10 and the supply path with the throttle 11 are made into independent slow-speed fuel supply paths, and the two slow-speed fuel supply paths are alternately connected. The present invention is characterized in that a switching valve that opens and closes is provided, and the switching valve is operated in relation to the opening degree of the throttle valve.
次に第１図に示すこの考案の実施例において、
１は１次減圧室、２は２次減圧室である。１次減
圧室１には緩速用燃料ロツク機構３が内装されて
いる。２次減圧室２は主燃料路４にて混合器５の
ベンチユリ部６に連通しており、該主燃料路４に
は主燃料絞り７が設置されている。８は混合気の
スロツトルバルブである。上記緩速用燃料ロツク
機構３には１次減圧室１に連通する緩速用燃料路
９が設けられており、該緩速用燃料路９は、緩速
用燃料絞り１０，１１を途中に設けてなる２本の
供給路１０ａ，１１ａに分岐されており、夫々切
替バルブ１２に連通されている。該切替バルブ１
２は、両供給路１０ａ，１１ａを、その一方が
徐々に開く場合は他方が徐々に閉じるように交互
に開閉するようになつている。また、切替バルブ
１２は緩速用燃料供給路１３によつて前記主燃料
路４に連通されている。該供給路１３は、図示点
線で示す１３ａ〜１３ｄのいずれかの一つで構成
するようにしてもよい。更に切替バルブ１２は、
スロツトルバルブ８の開度により、レバー８ａを
介して作動するようになつているが、混合気の吸
気管負圧、或いは車速等を感知する感知手段を設
け、この感知手段により機械的あるいは電気的に
作動するようにしてもよい。 Next, in the embodiment of this invention shown in FIG.
1 is a primary decompression chamber, and 2 is a secondary decompression chamber. A slow speed fuel lock mechanism 3 is installed in the primary decompression chamber 1. The secondary decompression chamber 2 communicates with a bench lily portion 6 of the mixer 5 through a main fuel passage 4, and a main fuel throttle 7 is installed in the main fuel passage 4. 8 is an air-fuel mixture throttle valve. The slow speed fuel lock mechanism 3 is provided with a slow speed fuel passage 9 communicating with the primary decompression chamber 1, and the slow speed fuel passage 9 has slow speed fuel throttles 10 and 11 in the middle. It is branched into two supply paths 10a and 11a, each of which is communicated with a switching valve 12. The switching valve 1
2 is configured to alternately open and close both supply channels 10a and 11a so that when one of them gradually opens, the other gradually closes. Further, the switching valve 12 is communicated with the main fuel path 4 through a slow speed fuel supply path 13. The supply path 13 may be constructed of any one of 13a to 13d indicated by dotted lines in the figure. Furthermore, the switching valve 12 is
The throttle valve is actuated via a lever 8a depending on the opening degree of the throttle valve 8, but a sensing means is provided to sense the negative pressure of the air-fuel mixture in the intake pipe, the vehicle speed, etc., and this sensing means uses a mechanical or electrical It may also be configured to operate automatically.
第２図は本考案の他の実施例を示すもので、緩
速用燃料路９を分岐することなく直接切替バルブ
１２に連通させ、切替バルブ１２からは、該切替
バルブ１２の作動により開閉する２本の緩速用燃
料供給路１４，１５を出し、これを混合器５に連
通させ、しかも該両緩速用燃料供給路１４，１５
の夫々の途中に前記と同様な緩速用燃料絞り１
０，１１を設けたものである。尚、一方の緩速燃
料供給路１５は、図示点線で示す１５ａ，１５
ｂ，１５ｃ，１５ｄ，１５ｅのいずれか一つで構
成するようにしてもよい。 FIG. 2 shows another embodiment of the present invention, in which the slow speed fuel path 9 is connected directly to the switching valve 12 without branching, and the switching valve 12 is opened and closed by the operation of the switching valve 12. Two slow speed fuel supply paths 14 and 15 are taken out and communicated with the mixer 5, and both of the slow speed fuel supply paths 14 and 15 are connected to the mixer 5.
A slow speed fuel throttle 1 similar to the above is installed in the middle of each of the
0 and 11 are provided. Note that one of the slow fuel supply paths 15 is 15a, 15 indicated by the dotted line in the figure.
It may be made up of any one of b, 15c, 15d, and 15e.
次に作動について説明する。まず第１図の実施
例について説明すると、始動、アイドル、軽負荷
時等の軽負荷運転時には、切替バルブ１２が図示
の状態にあり、LPG気化装置の１次減圧室１から
の緩速用燃料は、緩速用燃料ロツク機構３、緩速
用燃料路９を通り、緩速用燃料絞り１０にて調量
されて、供給路１０ａより切替バルブ１２に入
り、緩速用燃料供給路１３を通つて混合器５に供
給される。またこの時、主燃料は、スロツトルバ
ルブ８の開度、すなわちベンチユリ６部の負圧に
応じて、２次減圧室２から主燃料路４、主燃料用
絞り７を経てベンチユリ６へ吸引供給される。こ
の状態より更に、スロツトルバルブ８が開かれ、
吸入空気量が増加すると、切替バルブ１２が段階
的に切替えられて、供給路１０ａが閉じると共に
供給路１１ａが開き、これにより緩速用燃料は、
緩速用燃料絞り１１によつて調量され、切替バル
ブ１２を通つて供給される。従つて、始動、アイ
ドル、軽負荷時には、燃料供給量は、ほとんど緩
速用燃料絞り１０により調量され、一方スロツト
ルバルブ８が開かれ、切替バルブ１２が切替つた
後においては、燃料供給量は緩速用燃料絞り１１
及び主燃料用絞り７によつて調量される。 Next, the operation will be explained. First, to explain the embodiment shown in FIG. 1, during light load operation such as starting, idling, and light load, the switching valve 12 is in the state shown, and the slow speed fuel is supplied from the primary decompression chamber 1 of the LPG vaporizer. The fuel passes through the slow speed fuel lock mechanism 3 and the slow speed fuel path 9, is metered by the slow speed fuel throttle 10, enters the switching valve 12 from the supply path 10a, and flows through the slow speed fuel supply path 13. is supplied to the mixer 5. At this time, the main fuel is sucked and supplied from the secondary decompression chamber 2 to the bench lily 6 via the main fuel passage 4 and the main fuel throttle 7 depending on the opening degree of the throttle valve 8, that is, the negative pressure in the bench lily 6. be done. Further from this state, the throttle valve 8 is opened,
When the amount of intake air increases, the switching valve 12 is switched in stages to close the supply passage 10a and open the supply passage 11a, whereby the slow speed fuel is
The amount of fuel is metered by a slow speed fuel throttle 11 and supplied through a switching valve 12. Therefore, during startup, idling, and light load, the amount of fuel supplied is mostly regulated by the slow speed fuel throttle 10, while after the throttle valve 8 is opened and the switching valve 12 is switched, the amount of fuel supplied is is slow speed fuel throttle 11
And the amount is metered by the main fuel throttle 7.
第２図においては、切替バルブ１２の下流を２
本の供給路１４，１５に分岐して夫々に緩速用燃
料絞り１０，１１を設けたもので、その作動は第
１図のものとほぼ同じである。 In FIG. 2, the downstream of the switching valve 12 is
The main supply paths 14 and 15 are branched and provided with slow speed fuel throttles 10 and 11, respectively, and their operation is almost the same as that in FIG.
以上のようにこの考案にあつては、緩速用燃料
路を２本の供給路に分岐して夫々に緩速用燃料絞
り１０，１１を設け、一方の供給路に設けた緩速
用燃料絞り１０を始動、アイドル、軽負荷時等の
緩速用燃料制御に用い、他方の供給路に設けた絞
り１１をスロツトルを開いていつた後の軽中負荷
時の緩速用燃料制御に用いて、夫々独立した緩速
用燃料供給路としたので、アイドルセツト時の空
燃比を変えたとき、従来のものにおいては第３図
に示すように軽中負荷域迄空燃比が変わるのに比
べ、本考案においては、第４図に示すようにアイ
ドルセツト時の空燃比を変化させても、軽中負荷
域においては、空燃比は一定となる。したがつ
て、一度軽中負荷空燃比を、主燃料絞り７と緩速
用燃料絞り１１で設定すれば、アイドルセツト時
の空燃比を調整する緩速用燃料絞り１０を種々の
要求に対し調整を行つても、軽中負荷域の空燃比
は変化しない。このことから、昨今要求されてい
る排気ガス規制及び低燃費化から要求される軽中
負荷域の空燃比の安定化及び、種々のアイドルセ
ツトの要求に対し、実用上有効なものである。 As described above, in this invention, the slow speed fuel path is branched into two supply paths, each of which is provided with slow speed fuel throttles 10 and 11, and one supply path is provided with slow speed fuel. The throttle 10 is used for slow speed fuel control during starting, idling, light loads, etc., and the throttle 11 provided on the other supply path is used for slow speed fuel control during light and medium loads after the throttle is opened. , are independent fuel supply paths for slow speed, so when the air-fuel ratio at idle setting is changed, compared to the conventional model where the air-fuel ratio changes up to the light and medium load range as shown in Figure 3. In the present invention, even if the air-fuel ratio at idle setting is changed as shown in FIG. 4, the air-fuel ratio remains constant in the light to medium load range. Therefore, once the light/medium load air-fuel ratio is set using the main fuel throttle 7 and the slow-speed fuel throttle 11, the slow-speed fuel throttle 10, which adjusts the air-fuel ratio at idle setting, can be adjusted to meet various requirements. Even if this is done, the air-fuel ratio in the light and medium load range will not change. For this reason, it is practically effective for stabilizing the air-fuel ratio in the light and medium load range, which is required due to exhaust gas regulations and low fuel consumption, which are required these days, and for various idle set requirements.
第１図及び第２図はこの考案の実施例を示す各
断面図、第３図は従来の装置のスロツトルバルブ
開度に対する空燃比特性を示す図、第４図はこの
考案によるスロツトルバルブ開度に対する空燃比
特性を示す図である。
１……１次減圧室、２……２次減圧室、３……
緩速用燃料ロツク機構、４……主燃料路、５……
混合器、７……主燃料用絞り、８……スロツトル
バルブ、９……緩速用燃料路、１０，１１……緩
速用燃料絞り、１０ａ，１１ａ……分岐した連通
路、１２……切替バルブ、１３……緩速用燃料供
給路、１４，１５……分岐した連通路である緩速
用燃料供給路。
Figures 1 and 2 are cross-sectional views showing an embodiment of this invention, Figure 3 is a diagram showing air-fuel ratio characteristics with respect to throttle valve opening of a conventional device, and Figure 4 is a throttle valve according to this invention. FIG. 3 is a diagram showing air-fuel ratio characteristics with respect to opening degree. 1...Primary decompression chamber, 2...Secondary decompression chamber, 3...
Slow speed fuel lock mechanism, 4... Main fuel path, 5...
Mixer, 7... Main fuel throttle, 8... Throttle valve, 9... Slow speed fuel path, 10, 11... Slow speed fuel throttle, 10a, 11a... Branched communication path, 12... ...Switching valve, 13... Slow speed fuel supply path, 14, 15... Slow speed fuel supply path which is a branched communication path.
Claims (1)
室２に主燃料路４を設け、１次減圧室に緩速用燃
料路９を設け、上記緩速用燃料路９を２本の供給
路に分岐して混合器側へ連通するようにしたもの
において、上記分岐した２本の供給路にそれぞれ
緩速用燃料絞り１０、１１を設け、且つ上記一方
の供給路に設けた緩速用燃料絞り１０を始動、ア
イドル、軽中負荷時の燃料制御用とし、他方の供
給路に設けた緩速用燃料絞り１１を軽中負荷時の
燃料制御用として、それぞれ独立した緩速燃料供
給路となし、更に上記２本の緩速燃料供給路を交
互に開閉する切替バルブを設け、これをスロツト
ルバルブの開度に関連して作動させるようにした
ことを特徴とするLPG気化装置における緩速用燃
料供給機構。 It has a primary decompression chamber 1 and a secondary decompression chamber 2, the secondary decompression chamber 2 is provided with a main fuel path 4, the primary decompression chamber is provided with a slow speed fuel path 9, and the slow speed fuel path 9 is provided with a main fuel path 4. In a device in which two supply paths are branched and communicated with the mixer side, slow speed fuel throttles 10 and 11 are provided in each of the two branched supply paths, and one of the supply paths is provided with slow speed fuel throttles 10 and 11. The slow speed fuel throttle 10 provided on the other side is used for fuel control during starting, idling, and light and medium loads, and the slow speed fuel throttle 11 provided on the other supply path is used for fuel control during light and medium loads. The LPG is characterized in that it has a fast fuel supply path, and is further provided with a switching valve that alternately opens and closes the two slow speed fuel supply paths, and is operated in relation to the opening degree of the throttle valve. A slow-speed fuel supply mechanism in a carburetor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3549782U JPS58137856U (en) | 1982-03-12 | 1982-03-12 | Slow speed fuel supply mechanism in LPG vaporizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3549782U JPS58137856U (en) | 1982-03-12 | 1982-03-12 | Slow speed fuel supply mechanism in LPG vaporizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58137856U JPS58137856U (en) | 1983-09-16 |
| JPS6221733Y2 true JPS6221733Y2 (en) | 1987-06-02 |
Family
ID=30046968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3549782U Granted JPS58137856U (en) | 1982-03-12 | 1982-03-12 | Slow speed fuel supply mechanism in LPG vaporizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58137856U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5425915B2 (en) * | 1975-04-15 | 1979-08-31 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS608135Y2 (en) * | 1977-07-22 | 1985-03-20 | 愛三工業株式会社 | Slow speed fuel supply mechanism in LPG vaporizer |
-
1982
- 1982-03-12 JP JP3549782U patent/JPS58137856U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5425915B2 (en) * | 1975-04-15 | 1979-08-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58137856U (en) | 1983-09-16 |
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