JPH0140223B2 - - Google Patents
Info
- Publication number
- JPH0140223B2 JPH0140223B2 JP59017118A JP1711884A JPH0140223B2 JP H0140223 B2 JPH0140223 B2 JP H0140223B2 JP 59017118 A JP59017118 A JP 59017118A JP 1711884 A JP1711884 A JP 1711884A JP H0140223 B2 JPH0140223 B2 JP H0140223B2
- Authority
- JP
- Japan
- Prior art keywords
- primary
- chamber
- valve
- primary chamber
- lpg
- 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 19
- 239000006200 vaporizer Substances 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 241000234435 Lilium Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- -1 that is Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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
-
- 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
Description
【発明の詳細な説明】
＜技術分野＞
本発明は内燃機関用のLPGベーパライザに関
する。DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to an LPG vaporizer for internal combustion engines.
＜従来技術＞
LPGを使用する内燃機関においては、一般に
第１図に示すように、LPGボンベ１からフイル
ター２及びソレノイドバルブ３を介してベーパラ
イザ４にLPGの液相燃料を供給し、ベーパライ
ザ４で減圧、気化、調圧した後、ミキサー５を通
じて機関６に供給する。<Prior Art> In an internal combustion engine using LPG, as shown in FIG. 1, LPG liquid phase fuel is generally supplied from an LPG cylinder 1 to a vaporizer 4 via a filter 2 and a solenoid valve 3, After being depressurized, vaporized, and regulated, it is supplied to the engine 6 through the mixer 5.
従来のLPGベーパライザとしては、例えば第
２図に示すようなものがある（実開昭56−152855
号公報参照）。 An example of a conventional LPG vaporizer is the one shown in Figure 2 (Utility Model No. 56-152855)
(see publication).
LPGの液相燃料は、入口部１０からフイルタ
ー１１を経て予熱室１２に入り、温水路１３を循
環している機関の冷却水により加熱される。そし
て、一次弁１４と弁シート１５との間隙から一次
室１６に入り、定められた圧力（一次圧）に減圧
される。一次圧が設定値より高くなると、ダイア
フラム１７がスプリング１８を押縮める方向に移
動し、レバー１９により一次弁１４が弁シート１
５に圧着されて、燃料の流入が阻止される。一次
室１６の燃料が消費されて一次圧が下がると、ス
プリング１８の力によりダイアフラム１７が元の
位置に移動し、一次弁１４は閉弁する。 The LPG liquid phase fuel enters the preheating chamber 12 from the inlet 10 through the filter 11 and is heated by the engine cooling water circulating in the hot water channel 13. Then, it enters the primary chamber 16 through the gap between the primary valve 14 and the valve seat 15, and is reduced to a predetermined pressure (primary pressure). When the primary pressure becomes higher than the set value, the diaphragm 17 moves in the direction of compressing the spring 18, and the lever 19 moves the primary valve 14 to the valve seat 1.
5 to prevent the inflow of fuel. When the fuel in the primary chamber 16 is consumed and the primary pressure decreases, the force of the spring 18 moves the diaphragm 17 to its original position, and the primary valve 14 closes.
一次室１６で気化された燃料は、二次弁２０と
弁シート２１との間隙から二次室２２に入り、さ
らに二次圧（略大気圧）まで減圧される。二次室
２２にはミキサー・ベンチユリ部の負圧が導かれ
ており、ダイアフラム２３は大気と負圧との差に
より変位してレバー２４をスプリング２５に抗し
て回動し、二次弁２０を開弁させる。こうして、
機関運転状態に応じたミキサー・ベンチユリ部の
負圧変化で機関への燃料供給量を制御する。 The fuel vaporized in the primary chamber 16 enters the secondary chamber 22 through the gap between the secondary valve 20 and the valve seat 21, and is further reduced in pressure to the secondary pressure (approximately atmospheric pressure). Negative pressure from the mixer bench lily is introduced into the secondary chamber 22, and the diaphragm 23 is displaced by the difference between the atmosphere and the negative pressure, causing the lever 24 to rotate against the spring 25. Open the valve. thus,
The amount of fuel supplied to the engine is controlled by changing the negative pressure in the mixer bench lily depending on the engine operating state.
しかしながら、このような従来のLPGベーパ
ライザにあつては、一次弁１４と二次弁２０とが
上部位置に設けられていて、一次弁１４から一次
室１６の上部空間に流入した燃料がそのまま図示
矢印の如く二次弁２０から二次室２２の上部空間
へと流れる構造となつていたため、一次室１６の
一次弁１４より下部においては気体の動きが停滞
しており、一次弁１４と弁シート１５との間隙か
ら一次室１６に入る時にLPG中の不純物（ター
ル）が気化できずに液状のまま霧状に噴出して一
次室１６の下部へ向かうと、気体が停滞している
ため霧状のタールの速度が弱まつて一次室１６の
壁に付着し、壁に付着したものは底部に溜まつて
しまう。そして、このように一次室１６の下部に
タールが溜まつた場合は、抜け道がなく、ダイア
フラム１７の有効面積が次第に小さくなつて一次
圧が上昇し、過濃混合気となつて機関の安定性不
良及び燃費不良が発生するという問題点があつ
た。 However, in such a conventional LPG vaporizer, the primary valve 14 and the secondary valve 20 are provided at the upper position, and the fuel flowing from the primary valve 14 into the upper space of the primary chamber 16 is directly directed by the arrow shown in the figure. Since the structure was such that gas flows from the secondary valve 20 to the upper space of the secondary chamber 22, the movement of gas is stagnant below the primary valve 14 in the primary chamber 16, and the movement of gas is stagnant between the primary valve 14 and the valve seat 15. When the impurities (tar) in the LPG enters the primary chamber 16 through the gap between the LPG and the gas, the impurities (tar) in the LPG cannot be vaporized and are spouted out as a mist as they head towards the lower part of the primary chamber 16, as the gas is stagnant. The velocity of the tar decreases and it adheres to the wall of the primary chamber 16, and the tar that adheres to the wall accumulates at the bottom. If tar accumulates in the lower part of the primary chamber 16 in this way, there is no way out, and the effective area of the diaphragm 17 gradually decreases, causing the primary pressure to rise, resulting in a superrich mixture, which reduces the stability of the engine. There were problems in that defects and poor fuel efficiency occurred.
＜発明の目的＞
本発明は、このような従来の問題点に鑑み、ベ
ーパライザの一次室にタールが溜まらないように
して、機関性能への影響を回避することを目的と
する。<Object of the Invention> In view of such conventional problems, an object of the present invention is to prevent tar from accumulating in the primary chamber of a vaporizer, thereby avoiding the influence on engine performance.
＜発明の構成＞
このため、本発明は、一次室から二次室への燃
料の通路を一次室の下部から形成し、壁部を貫通
させて二次弁の入口部へ連絡させる構成とし、タ
ール分を機関へ吸入される燃料でパージするよう
にしたものである。<Configuration of the Invention> For this reason, the present invention has a configuration in which a fuel passage from the primary chamber to the secondary chamber is formed from the lower part of the primary chamber, and communicates with the inlet of the secondary valve by penetrating the wall. The tar is purged with the fuel that is sucked into the engine.
＜実施例＞
以下に第３図〜第５図に示す一実施例を説明す
る。但し、この実施例において従来例と同一部分
には同一符号を付して異なる部分を中心に説明す
る。<Example> An example shown in FIGS. 3 to 5 will be described below. However, in this embodiment, the same parts as in the conventional example are given the same reference numerals, and the explanation will focus on the different parts.
二次弁２０の弁シート２１入口部を直接一次室
１６に連通させることなく一次室ボデイ２６を介
在させ、一次室ボデイ２６に、一次室１６とその
下部において連通し側方に延びる通路２７と、こ
の通路２７から一次室１６の側方を通つて上方に
延びる通路２８と、この通路２８から一次室１６
の上方に向かつて斜めに延びる通路２９と、この
通路２９から一次室ボデイ２６の端面に向かつて
開口し二次弁２０の弁シート２１入口部と連通す
る通路３０とを形成してある。尚、一次室ボデイ
２６は熱伝導の良いアルミ合金等により形成して
ある。 The inlet portion of the valve seat 21 of the secondary valve 20 is not directly communicated with the primary chamber 16, but the primary chamber body 26 is interposed, and the primary chamber body 26 is provided with a passage 27 extending laterally and communicating with the primary chamber 16 at its lower part. , a passage 28 extending upwardly from this passage 27 through the side of the primary chamber 16 , and a passage 28 extending upwardly from this passage 27 through the side of the primary chamber 16 .
A passage 29 extending diagonally upward and a passage 30 opening from the passage 29 toward the end face of the primary chamber body 26 and communicating with the inlet portion of the valve seat 21 of the secondary valve 20 are formed. The primary chamber body 26 is made of aluminum alloy or the like with good thermal conductivity.
次に作用を説明する。 Next, the effect will be explained.
LPGボンベから来た液相燃料は入口部１０か
らフイルター１１を経て予熱室１２に入り、一次
弁１４と弁シート１５との間隙から一次室１６に
入る。このとき、LPGは急激に減圧されて気化
するが、LPG中の不純物は気化できずに液体の
まま霧状に噴出する。しかし、一次室１６から二
次室２２への気体の流れを一次室１６の底部から
二次室２２へ導くように通路２７，２８，２９，
３０を形成してあるため、一次室１６内の気体を
全体的に二次室２２の方へ向かわせることができ
る。したがつて、霧状タールはこの流れに乗り二
次室２２へ大部分が流れていく。また、一部は壁
に付着するが、この分は全体の気体の動きにより
徐々に二次室２２に導かれれるので、一次室１６
へタールが溜まることはない。 The liquid phase fuel coming from the LPG cylinder enters the preheating chamber 12 from the inlet section 10 via the filter 11, and enters the primary chamber 16 through the gap between the primary valve 14 and the valve seat 15. At this time, LPG is rapidly reduced in pressure and vaporized, but the impurities in LPG cannot be vaporized and are ejected as a mist as a liquid. However, the passages 27, 28, 29 are arranged so as to guide the gas flow from the primary chamber 16 to the secondary chamber 22 from the bottom of the primary chamber 16 to the secondary chamber 22.
30, the gas within the primary chamber 16 can be directed toward the secondary chamber 22 as a whole. Therefore, most of the mist tar flows into the secondary chamber 22 following this flow. Although some of the gas adheres to the wall, this part is gradually guided to the secondary chamber 22 by the movement of the entire gas, so the primary chamber 16
There is no accumulation of hetar.
一次室１６から二次室２２に流入したタールは
ほとんどが機関に供給されて燃焼するが、一部は
二次室２２の壁に付着して底部に溜まる。二次室
２２にタールが溜まると、ダイアフラム２３の有
効面積が減少し、ミキサー・ベンチユリ部の負圧
に対し二次弁２０を開弁する力が弱まるので、混
合気はリーンとなり、運転性不良となつて発覚す
るが、二次室２２には図示してはいないがタール
ドレンコツクが従来より設けられていて、通常は
定期的にタールドレンコツクによりタール抜きを
行うので、この不具合は未然に防ぐことができ
る。 Most of the tar that has flowed into the secondary chamber 22 from the primary chamber 16 is supplied to the engine and burned, but some of it adheres to the walls of the secondary chamber 22 and accumulates at the bottom. When tar accumulates in the secondary chamber 22, the effective area of the diaphragm 23 decreases, and the force that opens the secondary valve 20 against the negative pressure in the mixer/ventilate section weakens, resulting in a lean mixture and poor drivability. However, although it is not shown in the figure, a tar drain tank is conventionally provided in the secondary chamber 22, and tar drains are normally removed periodically, so this problem can be avoided. It can be prevented.
尚、タールはLPGの不純物であり、混入程度
はまちまちである。したがつて、タール溜まり量
もLPG燃料に大いに左右されることは言うまで
もない。したがつて、本発明は、不純物すなわち
タールの多いLPGを使用しても、それに伴う燃
費劣化等の不具合を未然に防ぐことができ、実用
性が高い。 Note that tar is an impurity in LPG, and the degree of contamination varies. Therefore, it goes without saying that the amount of tar accumulated also greatly depends on the LPG fuel. Therefore, even if LPG containing a large amount of impurities, that is, tar, is used, the present invention can prevent problems such as deterioration of fuel efficiency caused by it, and is highly practical.
＜発明の効果＞
以上説明したように本発明によれば、一次室か
ら二次室への通路を一次室の下部から形成して二
次室の上部の二次弁の入口部に連絡させる構成と
したため、タール分を機関へ吸入される燃料でパ
ージでき、一次室にタールが溜まることを防止で
きるので、一次室にタールが溜まつてダイアフラ
ム面積が減少し一次圧が上昇して機関に供給され
る混合気が過濃になり運転性不良及び燃費不良等
の不具合を生じるのを防止できる。また、二次弁
に到達するまでの燃料の通路を長くでき、液相燃
料の気化を十分に促進できるという利点もある。<Effects of the Invention> As explained above, according to the present invention, the passage from the primary chamber to the secondary chamber is formed from the lower part of the primary chamber and communicates with the inlet of the secondary valve at the upper part of the secondary chamber. As a result, the tar content can be purged with the fuel sucked into the engine, preventing tar from accumulating in the primary chamber, reducing the diaphragm area due to tar accumulating in the primary chamber, increasing the primary pressure, and supplying it to the engine. This can prevent problems such as poor drivability and poor fuel efficiency from occurring due to the mixture being too rich. Further, there is an advantage that the passage of the fuel until it reaches the secondary valve can be lengthened, and the vaporization of the liquid phase fuel can be sufficiently promoted.
第１図はLPG機関の燃料系統の全体図、第２
図は従来例を示すLPGベーパライザの断面図、
第３図は本発明の一実施例を示すLPGベーパラ
イザの断面図、第４図は同上の側面図、第５図は
同上の底面図である。
１４……一次弁、１６……一次室、２０……二
次弁、２２……二次室、２６……一次室ボデイ、
２７，２８，２９，３０……通路。
Figure 1 is an overall diagram of the fuel system of an LPG engine, Figure 2
The figure is a cross-sectional view of a conventional LPG vaporizer.
FIG. 3 is a sectional view of an LPG vaporizer showing an embodiment of the present invention, FIG. 4 is a side view of the same, and FIG. 5 is a bottom view of the same. 14...Primary valve, 16...Primary chamber, 20...Secondary valve, 22...Secondary chamber, 26...Primary chamber body,
27, 28, 29, 30...Aisle.
Claims (1)
次弁を有する内燃機関用LPGベーパライザにお
いて、一次室から二次室への燃料の通路を一次室
の下部から形成し、壁部を貫通させて二次弁の入
口部へ連絡させる構成としたことを特徴とする
LPGベーパライザ。1. In an LPG vaporizer for internal combustion engines that has a primary valve and a secondary valve in the upper part of the primary chamber and the secondary chamber, respectively, a fuel passage from the primary chamber to the secondary chamber is formed from the lower part of the primary chamber and penetrates the wall. It is characterized by having a structure in which it is connected to the inlet part of the secondary valve.
LPG vaporizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59017118A JPS60162046A (en) | 1984-02-03 | 1984-02-03 | Lpg vaporizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59017118A JPS60162046A (en) | 1984-02-03 | 1984-02-03 | Lpg vaporizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60162046A JPS60162046A (en) | 1985-08-23 |
| JPH0140223B2 true JPH0140223B2 (en) | 1989-08-25 |
Family
ID=11935120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59017118A Granted JPS60162046A (en) | 1984-02-03 | 1984-02-03 | Lpg vaporizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60162046A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522296U (en) * | 1991-09-04 | 1993-03-23 | 征雄 藤沢 | Gear type flap rudder |
| US6145495A (en) * | 1999-04-23 | 2000-11-14 | Daryl J. Klassen | Propane injection system for a diesel engine |
| KR20020094401A (en) * | 2001-06-11 | 2002-12-18 | 최의수 | cieansing a way of vaporizer |
| JP4732973B2 (en) * | 2006-07-14 | 2011-07-27 | 株式会社ニッキ | Gas fuel engine vaporizer |
-
1984
- 1984-02-03 JP JP59017118A patent/JPS60162046A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60162046A (en) | 1985-08-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |