JPH022925Y2 - - Google Patents
Info
- Publication number
- JPH022925Y2 JPH022925Y2 JP18337984U JP18337984U JPH022925Y2 JP H022925 Y2 JPH022925 Y2 JP H022925Y2 JP 18337984 U JP18337984 U JP 18337984U JP 18337984 U JP18337984 U JP 18337984U JP H022925 Y2 JPH022925 Y2 JP H022925Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- passage
- fuel
- fuel passage
- slow
- 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 85
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 230000006837 decompression Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 241000234435 Lilium Species 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising 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】 イ 考案の目的 イ−1 産業上の利用分野 本考案はLPG機関の燃料供給装置に関する。[Detailed explanation of the idea] B. Purpose of the invention E-1 Industrial application fields The present invention relates to a fuel supply system for an LPG engine.
イ−2 従来技術
従来、この種の装置として、第2図に示す如
く、レギユレータ1の二次減圧室2bよりの主燃
料通路3から補助燃料通路4を分岐してその下流
開口部4aを、主燃料調整弁5の下流部で主燃料
通路3に合流させると共に該補助燃料通路4に開
閉弁6を設け、該開閉弁6を、スロツトルバルブ
7に関連して設けた制御カム8と制御レバー9に
よつて開閉制御するようにし、機関のアイドリン
グ時には該開閉弁6を閉じ、機関の回転が上昇し
て低速域から高速域へのつなぎ域時には該開閉弁
6を開口して燃料を増量しそのつなぎ性能を向上
させ、また高速域では該開閉弁6を再度閉じて過
濃混合気の供給を防止して経済的な燃料供給が行
なわれるようにしたものが特公昭52−24609号公
報に提案されている。また、同様な目的より、前
記のような開閉弁の開閉制御を、機関の負荷状態
を電気的に検出する回路や電磁石によつて行なう
ようにしたものも実公昭55−31231号公報に提案
されている。A-2 Prior Art Conventionally, as shown in FIG. 2, as shown in FIG. 2, an auxiliary fuel passage 4 is branched from a main fuel passage 3 from a secondary decompression chamber 2b of a regulator 1, and its downstream opening 4a is connected to a downstream opening 4a of this type of device. The main fuel passage 3 is connected to the main fuel passage 3 downstream of the main fuel regulating valve 5, and an on-off valve 6 is provided in the auxiliary fuel passage 4, and the on-off valve 6 is controlled by a control cam 8 provided in association with the throttle valve 7. Opening/closing is controlled by a lever 9, and when the engine is idling, the on-off valve 6 is closed, and when the engine rotation is rising and the transition is from a low speed range to a high speed range, the on-off valve 6 is opened to increase the amount of fuel. Japanese Patent Publication No. 52-24609 discloses a system that improves the connecting performance of fuel and closes the on-off valve 6 again in the high-speed range to prevent the supply of an overly rich mixture and to provide economical fuel supply. has been proposed. Furthermore, for the same purpose, a method was proposed in Japanese Utility Model Publication No. 55-31231 in which the opening/closing control of the on-off valve as described above was performed using a circuit or electromagnet that electrically detects the load condition of the engine. ing.
イ−3 本考案が解決しようとする問題点
前記従来技術においては、補助燃料通路4の下
流開口部4aを主燃料調整弁5の下流に合流させ
ていることから、高速域において、もし開閉弁6
を開口状態のまゝに保持すると、高ベンチユリ負
圧が補助燃料通路4内に作用し該通路より燃料が
吸い出されて過濃混合気となる。そのため、高速
域では前記のように開閉弁6を閉じているが、前
者のようにカム機構により開閉制御するものにお
いては、精密なカム機構を必要とし機関との適合
が困難であり、また後者のものにおいては、その
開閉制御機構が複雑で高価になる問題がある。A-3 Problems to be Solved by the Present Invention In the prior art described above, since the downstream opening 4a of the auxiliary fuel passage 4 is merged downstream of the main fuel regulating valve 5, in the high speed range, if the opening/closing valve 6
When the auxiliary fuel passage 4 is kept open, high vent valve negative pressure acts on the auxiliary fuel passage 4, and fuel is sucked out from the auxiliary fuel passage 4, resulting in a rich mixture. Therefore, in the high speed range, the on-off valve 6 is closed as described above, but the former, which uses a cam mechanism to control opening and closing, requires a precise cam mechanism and is difficult to match with the engine, and the latter However, there is a problem in that the opening/closing control mechanism is complicated and expensive.
そこで本考案は、機関の低速域から高速域への
つなぎ時に補助燃料を供給してつなぎ性能を向上
し、かつ高速域においても過濃混合気とならない
燃料供給装置を簡易な機構でかつ安価に形成でき
るようにして前記の問題点を解決することを目的
とするものである。 Therefore, the present invention is a simple and inexpensive fuel supply system that improves the performance of the transition by supplying auxiliary fuel when the engine transitions from a low-speed range to a high-speed range, and that prevents the mixture from becoming too rich even in the high-speed range. It is an object of the present invention to solve the above-mentioned problems by making it possible to form a wafer.
ロ 考案の構成
ロ−1 問題点を解決するための手段
本考案は前記の問題点を解決するために、2段
減圧式レギユレータ1の一次減圧室2aよりスロ
ー燃料通路11を設け、二次減圧室2bより主燃
料通路3を設けるようにしたものにおいて、前記
スロー燃料通路11の先端を主燃料通路3に対
し、該主燃料通路3に設けた主燃料調整弁5の上
流部に合流させ、更に前記スロー燃料通路11に
は、該スロー燃料通路11に設けた調整弁12を
迂回するバイパス通路13を設け、該バイパス通
路13には、これを開閉する開閉弁14を設け、
該開閉弁14を、スロツトルバルブ7に連動して
開閉させるようにしたことを特徴とするものであ
る。B. Structure of the invention B-1. Means for solving the problems In order to solve the above-mentioned problems, the present invention provides a slow fuel passage 11 from the primary decompression chamber 2a of the two-stage decompression regulator 1, and In the case where the main fuel passage 3 is provided from the chamber 2b, the tip of the slow fuel passage 11 is joined to the upstream part of the main fuel regulating valve 5 provided in the main fuel passage 3, Further, the slow fuel passage 11 is provided with a bypass passage 13 that bypasses the regulating valve 12 provided in the slow fuel passage 11, and the bypass passage 13 is provided with an on-off valve 14 that opens and closes it.
The present invention is characterized in that the on-off valve 14 is opened and closed in conjunction with the throttle valve 7.
ロ−2 作用
機関のアイドリング時には開閉弁14が閉じ状
態にあり、スロー燃料通路11よりスロー燃料が
流出する。次で機関の回転を上げるためにスロツ
トルバルブ7が開きはじめると開閉弁14が開口
する。これによりバイパス通路13からもスロー
燃料が増量され、機関の低速域から高速域へのつ
なぎ域におけるつなぎ性能を向上させる。次で機
関が高速域になると主燃料通路3より主燃料が供
給される。このとき、前記の開閉弁14は開口状
態のまゝである。そのため、バイパス通路13か
らも燃料が流出するが、該バイパス通路13は主
燃料調整弁5の上流に開口しているので、該バイ
パス通路13に対する高ベンチユリ負圧の作用が
少ないことから、その燃料流出量は、総燃料流量
に対して無視できる程度に少ない。したがつて、
バイパス通路13が高速域時に開口していても過
濃混合気を生成させない。RO-2 Operation When the engine is idling, the on-off valve 14 is in a closed state, and slow fuel flows out from the slow fuel passage 11. Next, when the throttle valve 7 begins to open to increase the rotation of the engine, the on-off valve 14 opens. This increases the amount of slow fuel from the bypass passage 13 as well, improving the transition performance in the transition region from the low speed range to the high speed range of the engine. Next, when the engine reaches a high speed range, main fuel is supplied from the main fuel passage 3. At this time, the on-off valve 14 remains open. Therefore, fuel also flows out from the bypass passage 13, but since the bypass passage 13 opens upstream of the main fuel regulating valve 5, the effect of high vent pressure on the bypass passage 13 is small, so that the fuel flows out. The outflow amount is negligibly small compared to the total fuel flow rate. Therefore,
Even if a bypass passage 13 is opened in a high speed range, a superrich mixture is not generated.
ロ−3 実施例
次に第1図に示す本考案の実施例について説明
する。RO-3 Embodiment Next, an embodiment of the present invention shown in FIG. 1 will be described.
1は2段減圧式レギユレータ1で、その2aは
一次減圧室、2bは二次減圧室である。3は前記
二次減圧室2bに連通した主燃料通路で、その先
端は混合器10の吸気路10aに対し燃料噴出孔
3aによつて開口されている。該主燃料通路3に
は主燃料調整弁5が設けられている。11は前記
一次減圧室2aに連通したスロー燃料通路で、そ
の先端は、前記主燃料調整弁5の上流部における
主燃料通路3に対して開口端11aによつて連通
している。12はスロー燃料を調整する調整弁
で、スロー燃料通路11に設けられている。13
はバイパス路で、その上流端が調整弁12の上流
部におけるスロー燃料通路11に連通し、下流端
が調整弁12の下流部におけるスロー燃料通路1
1に連通している。 Reference numeral 1 designates a two-stage pressure reduction type regulator 1, in which 2a is a primary pressure reduction chamber and 2b is a secondary pressure reduction chamber. Reference numeral 3 denotes a main fuel passage communicating with the secondary decompression chamber 2b, the tip of which is opened to the intake passage 10a of the mixer 10 through a fuel injection hole 3a. A main fuel regulating valve 5 is provided in the main fuel passage 3. A slow fuel passage 11 communicates with the primary decompression chamber 2a, and its tip communicates with the main fuel passage 3 at the upstream side of the main fuel regulating valve 5 through an open end 11a. Reference numeral 12 denotes a regulating valve for regulating slow fuel, which is provided in the slow fuel passage 11. 13
is a bypass passage whose upstream end communicates with the slow fuel passage 11 in the upstream part of the regulating valve 12, and its downstream end communicates with the slow fuel passage 1 in the downstream part of the regulating valve 12.
It is connected to 1.
14は前記バイパス通路13の流路を開閉する
開閉弁で、スプリング15により常時開方向に付
勢されている。7はスロツトルバルブで、そのス
ロツトルシヤフト7aには作動レバー16が固着
されている。該作動レバー16は、スロツトルバ
ルブ7のアイドル状態時に前記開閉弁14をスプ
リング15に抗して押し上げて閉じ操作し、スロ
ツトルバルブ7の開口作動時に下動して開閉弁1
4をスプリング15の荷重により開口するように
設定されている。 Reference numeral 14 denotes an on-off valve that opens and closes the flow path of the bypass passage 13, and is always urged in the opening direction by a spring 15. 7 is a throttle valve, and an operating lever 16 is fixed to the throttle shaft 7a. The actuating lever 16 pushes up and closes the on-off valve 14 against the spring 15 when the throttle valve 7 is in an idle state, and moves down and closes the on-off valve 1 when the throttle valve 7 is opened.
4 is set to open by the load of a spring 15.
次に該実施例の作動について説明する。 Next, the operation of this embodiment will be explained.
機関のアイドリング時には、開閉弁14が閉じ
状態にあり、レギユレータ1の一次減圧室2aよ
りのスロー燃料は、スロー燃料通路11を経て調
整弁12で計量され、開口端11aより主燃料通
路3に流出し、主燃料調整弁5部を通り噴出孔3
aより混合器10内に供給される。次で、機関の
回転を上げるために混合器10のスロツトルバル
ブ7を開きはじめると、スロツトルシヤフト7a
に固着された作動レバー16が下降回転し、開閉
弁14はスプリング15の荷重によつて下降して
開口する。これにより、スロー燃料通路11内の
スロー燃料は、調整弁12をバイパスするバイパ
ス通路13からも流出して混合器10内へのスロ
ー燃料量を増量する。このとき、スロー燃料通路
11の主燃料通路3に対する開口部とバイパス通
路13のスロー燃料通路11に対する開口部は共
に主燃料調整弁5の上流部であるから、これらに
対する混合器10のベンチユリ負圧の作用は少な
い。しかし、スロー燃料は、レギユレータの1次
圧力で圧出されるので、前記ベンチユリ負圧に関
係なく、調整弁12の調整量とバイパス通路13
の開口面積に合つたスロー燃料が混合器10内に
噴出供給される。したがつて、機関の低速域から
高速域へのつなぎ域において燃料が増量され、つ
なぎ性能を向上できる。次で機関が高速域になる
とレギユレータ1の二次減圧室2bの燃料が主燃
料通路3を経て主燃料調整弁5で計量され、噴出
孔3aより混合器10内に供給される。このと
き、スロー燃料通路11とバイパス通路13は共
に開口しているが、これら両開口端は共に主燃料
調整弁5の上流にあるため、混合器10のベンチ
ユリ部に発生した高負圧の作用は少ない。 When the engine is idling, the on-off valve 14 is in a closed state, and the slow fuel from the primary decompression chamber 2a of the regulator 1 is metered by the regulating valve 12 through the slow fuel passage 11, and flows out into the main fuel passage 3 from the open end 11a. The fuel passes through the main fuel adjustment valve 5 and into the injection hole 3.
It is supplied into the mixer 10 from a. Next, when the throttle valve 7 of the mixer 10 starts to be opened to increase the rotation of the engine, the throttle shaft 7a
The actuating lever 16 fixedly rotates downward, and the opening/closing valve 14 is lowered by the load of the spring 15 and opened. As a result, the slow fuel in the slow fuel passage 11 also flows out of the bypass passage 13 that bypasses the regulating valve 12, increasing the amount of slow fuel flowing into the mixer 10. At this time, since the opening of the slow fuel passage 11 to the main fuel passage 3 and the opening of the bypass passage 13 to the slow fuel passage 11 are both upstream of the main fuel regulating valve 5, the vent lily negative pressure of the mixer 10 with respect to them is has little effect. However, since the slow fuel is pumped out by the primary pressure of the regulator, the adjustment amount of the regulating valve 12 and the bypass passage 13 are independent of the negative pressure in the vent lily.
Slow fuel corresponding to the opening area of is injected into the mixer 10. Therefore, the amount of fuel is increased in the transition region from the low speed range to the high speed region of the engine, and the transition performance can be improved. Next, when the engine reaches a high speed range, the fuel in the secondary pressure reducing chamber 2b of the regulator 1 is metered by the main fuel regulating valve 5 through the main fuel passage 3, and is supplied into the mixer 10 from the injection hole 3a. At this time, both the slow fuel passage 11 and the bypass passage 13 are open, but since both of these opening ends are located upstream of the main fuel regulating valve 5, the effect of the high negative pressure generated in the vent lily portion of the mixer 10 is There are few.
そのため、スロー燃料通路11及びバイパス通
路13より供給される燃料量は機関の回転に関係
なく、一次減圧室2aの圧力と、調整弁12の調
整量と、バイパス通路13の開口面積により一定
となり、しかもバイパス通路13よりの増量分の
割合は、総燃料流量に対して無視できる程度であ
る。したがつて、バイパス通路13の開閉弁14
が高速域時に開口していても過濃混合気を生成し
ない。 Therefore, the amount of fuel supplied from the slow fuel passage 11 and the bypass passage 13 is constant depending on the pressure in the primary decompression chamber 2a, the adjustment amount of the regulating valve 12, and the opening area of the bypass passage 13, regardless of the rotation of the engine. Moreover, the proportion of the increase in fuel amount from the bypass passage 13 is negligible with respect to the total fuel flow rate. Therefore, the on-off valve 14 of the bypass passage 13
Even if the valve is opened at high speeds, it does not produce an overly rich mixture.
ハ 考案の効果
以上のように本考案によれば、機関の低速域か
ら高速域へのつなぎ域に補助燃料を増量してつな
ぎ性能を向上し、かつ高速域においても過濃混合
気とならない燃料供給装置を、スロツトルバルブ
の開度が所定以上の間では、バイパス通路に設け
た開閉弁を単に開口維持すればよいという単純な
操作で構成できるので、前記従来のようなカム面
の形状により開閉弁を開口後に再度所定時期に閉
塞制御するものに比べ、機関の回転に対する燃料
制御が極めて容易になり、また、従来の機関の負
荷状態を電気的に検知するものに比べ構造が簡単
で安価に形成できる特長がある。C. Effect of the invention As described above, according to the invention, the amount of auxiliary fuel is increased in the transition region from the low speed range to the high speed range of the engine to improve the transition performance, and the fuel mixture does not become too rich even in the high speed range. The supply device can be configured by a simple operation of simply keeping the on-off valve provided in the bypass passage open while the opening degree of the throttle valve is above a predetermined value. Compared to a valve that opens and then closes again at a predetermined time, it is much easier to control the fuel for engine rotation, and the structure is simpler and cheaper than the conventional system that electrically detects the engine load condition. It has the advantage that it can be formed into
第1図は本考案の実施例を示す側断面図、第2
図は従来構造を示す側断面図である。
1…レギユレータ、2a…一次減圧室、2b…
二次減圧室、3…主燃料通路、5…主燃料調整
弁、7…スロツトルバルブ、10…混合器、11
…スロー燃料通路、12…調整弁、13…バイパ
ス通路、14…開閉弁、16…作動レバー。
Fig. 1 is a side sectional view showing an embodiment of the present invention;
The figure is a side sectional view showing a conventional structure. 1...regulator, 2a...primary decompression chamber, 2b...
Secondary decompression chamber, 3... Main fuel passage, 5... Main fuel adjustment valve, 7... Throttle valve, 10... Mixer, 11
...Slow fuel passage, 12...Adjustment valve, 13...Bypass passage, 14...Opening/closing valve, 16...Operation lever.
Claims (1)
りスロー燃料通路11を設け、二次減圧室2bよ
り主燃料通路3を設けるようにしたものにおい
て、前記スロー燃料通路11の先端を主燃料通路
3に対し、該主燃料通路3に設けた主燃料調整弁
5の上流部に合流させ、更に前記スロー燃料通路
11には、該スロー燃料通路11に設けた調整弁
12を迂回するバイパス通路13を設け、該バイ
パス通路13には、これを開閉する開閉弁14を
設け、該開閉弁14を、スロツトルバルブ7に連
動して開閉させるようにしたことを特徴とする
LPG機関の燃料供給装置。 In a two-stage pressure reducing regulator 1 in which a slow fuel passage 11 is provided from the primary decompression chamber 2a and a main fuel passage 3 is provided from the secondary decompression chamber 2b, the tip of the slow fuel passage 11 is connected to the main fuel passage 3. On the other hand, a bypass passage 13 is provided in the slow fuel passage 11, which joins the upstream part of the main fuel regulating valve 5 provided in the main fuel passage 3, and further in the slow fuel passage 11, bypassing the regulating valve 12 provided in the slow fuel passage 11. The bypass passage 13 is provided with an on-off valve 14 for opening and closing it, and the on-off valve 14 is opened and closed in conjunction with the throttle valve 7.
Fuel supply system for LPG engine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18337984U JPH022925Y2 (en) | 1984-12-03 | 1984-12-03 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18337984U JPH022925Y2 (en) | 1984-12-03 | 1984-12-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6197565U JPS6197565U (en) | 1986-06-23 |
JPH022925Y2 true JPH022925Y2 (en) | 1990-01-24 |
Family
ID=30740884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18337984U Expired JPH022925Y2 (en) | 1984-12-03 | 1984-12-03 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH022925Y2 (en) |
-
1984
- 1984-12-03 JP JP18337984U patent/JPH022925Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6197565U (en) | 1986-06-23 |
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