JPS5812458B2 - In-cylinder injection hydrogen engine - Google Patents
In-cylinder injection hydrogen engineInfo
- Publication number
- JPS5812458B2 JPS5812458B2 JP52117679A JP11767977A JPS5812458B2 JP S5812458 B2 JPS5812458 B2 JP S5812458B2 JP 52117679 A JP52117679 A JP 52117679A JP 11767977 A JP11767977 A JP 11767977A JP S5812458 B2 JPS5812458 B2 JP S5812458B2
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen
- valve
- hydrogen gas
- pipe
- cylinder
- 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
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【発明の詳細な説明】
本発明は、低圧水素ガスを燃料とする４サイクル火花点
火エンジンに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a four-cycle spark ignition engine that uses low pressure hydrogen gas as fuel.
火花点火エンジンの燃料として水素ガスを用いる場合、
その水素ガス用エンジンとして例えば従来から用いられ
ているガソリンエンジンをそのまま利用したとすると、
ガソリンと水素ガスの物理的、化学的性質の差異に基づ
き、エンジンの能率が著しく低下する。When using hydrogen gas as fuel for a spark ignition engine,
For example, if a conventional gasoline engine is used as the hydrogen gas engine,
Engine efficiency is significantly reduced due to differences in physical and chemical properties between gasoline and hydrogen gas.
また、特に水素ガスはガソリンに比べて燃焼速度が速い
ために逆火が生じるなどの問題もある。In addition, hydrogen gas in particular has a faster combustion speed than gasoline, which causes backfire.
本発明は、水素ガスの物理的、化学的性質を考慮し、そ
れに適合した構成を有する４サイクル火花点火水素ガス
エンジンを提供しようとするものであり、また特に低圧
水素ガスを用いる場合に適合したエンジンを提供しよう
とするものである。The present invention takes into consideration the physical and chemical properties of hydrogen gas, and aims to provide a four-cycle spark ignition hydrogen gas engine having a configuration that is compatible with the physical and chemical properties of hydrogen gas. The aim is to provide an engine.
即ち、本発明は、水素ガスを燃料とする火花点火エンジ
ンにおいて、吸排気管のほかに水素ガス供給管を別個に
設けることにより、吸気管を通じてシリンダに流入する
空気とは独立に水素ガスを供給し、水素ガス供給管に設
けた圧力調整弁によって出力の制御を行うように構成し
たことを特徴とするものである。That is, in a spark ignition engine that uses hydrogen gas as fuel, the present invention provides a separate hydrogen gas supply pipe in addition to the intake and exhaust pipes, thereby supplying hydrogen gas independently of the air flowing into the cylinder through the intake pipe. , is characterized in that the output is controlled by a pressure regulating valve provided in the hydrogen gas supply pipe.
第１図は本発明に係る水素エンジンの構成を示すもので
、ピストン１を備えたシリンダ２０頭部に、排気管３、
吸気管４及び水素ガス供給管５を接続し、これらの各管
にそれぞれ排気弁６、吸気弁Ｉ及び水素供給弁８を設け
、また水素ガス供給管５には出力制御用の圧力調整弁９
を設けると共に，上記水素供給弁８の近傍に逆止弁１０
を設けている。FIG. 1 shows the configuration of a hydrogen engine according to the present invention, in which an exhaust pipe 3, an exhaust pipe 3,
An intake pipe 4 and a hydrogen gas supply pipe 5 are connected, and each of these pipes is provided with an exhaust valve 6, an intake valve I, and a hydrogen supply valve 8, respectively, and the hydrogen gas supply pipe 5 is provided with a pressure regulating valve 9 for output control.
In addition, a check valve 10 is provided near the hydrogen supply valve 8.
has been established.
なお、図中、１１は点火栓である。In addition, in the figure, 11 is a spark plug.
上記水素エンジンにおいては、出力の制御を圧力調整弁
９の調節等による水素ガスの供給量の増減によって行い
、また吸気管４からは空気のみをシリンダに吸入して、
その空気量の制御を行わないので、吸気管４には絞り弁
を設けていない。In the above hydrogen engine, the output is controlled by increasing or decreasing the amount of hydrogen gas supplied by adjusting the pressure regulating valve 9, etc., and only air is sucked into the cylinder from the intake pipe 4.
Since the air amount is not controlled, the intake pipe 4 is not provided with a throttle valve.
第２図は上記水素エンジンにおける各弁の開閉時期を示
すもので、０は開時期、Ｃは閉時期を示している。FIG. 2 shows the opening and closing timing of each valve in the hydrogen engine, where 0 indicates the opening timing and C indicates the closing timing.
同図に示すように、吸気弁７は吸入過程の終期における
下死点（ＢＤＣ）で閉じ、また水素供給弁８は上記下死
点で開いて点火前に閉じるもので、これらの吸気弁７と
水素供給弁８との開弁期間には相互に時期的な重なりが
ないように設定している。As shown in the figure, the intake valve 7 closes at bottom dead center (BDC) at the end of the intake process, and the hydrogen supply valve 8 opens at the bottom dead center and closes before ignition. The opening periods of the hydrogen supply valve 8 and the hydrogen supply valve 8 are set so that there is no overlap in timing with each other.
従って、空気と水素ガスのシリンダ内への流入は全《独
立に行われ、特にシリンダに流入する空気量が水素ガス
供給の影響を受けるようなことはない。Therefore, air and hydrogen gas flow into the cylinder completely independently, and the amount of air flowing into the cylinder is not affected by the hydrogen gas supply.
第３図は、上記水素エンジンの圧縮過程におけるシリン
ダ内圧力と水素供給圧力との関係を示すもので、曲線Ｉ
はシリンダ内圧力を、線■及び■は水素供給圧力で、線
■は水素供給量が多い場合（負荷率大）、線■は水素供
給量が少ない場合（負荷率小）を示している。Figure 3 shows the relationship between the cylinder pressure and the hydrogen supply pressure during the compression process of the hydrogen engine, and shows the curve I
indicates the cylinder internal pressure, lines ■ and ■ indicate the hydrogen supply pressure, line ■ indicates the case where the hydrogen supply amount is large (load factor is high), and line ■ indicates the case where the hydrogen supply amount is small (load factor is small).
同図から明らかなように、水素供給量が多い場合には、
水素供給弁８が開放している間において常に（シリンダ
内圧力）＜（水素供給圧力）の関係にあり、従って水素
ガスが供給管５から水素供給弁８を通ってシリンダ２に
流入し、シリンダ内の空気が水素ガス供給管５に逆流す
るようなことはない。As is clear from the figure, when the amount of hydrogen supplied is large,
While the hydrogen supply valve 8 is open, the relationship (cylinder internal pressure) < (hydrogen supply pressure) is always maintained, so hydrogen gas flows from the supply pipe 5 through the hydrogen supply valve 8 into the cylinder 2, and the cylinder There is no possibility that the air inside will flow back into the hydrogen gas supply pipe 5.
これに対して、水素供給圧力が線■によって示す程度に
低い場合には、圧縮過程初期のシリンダ内圧力が低い間
、即ち線■におけるイーロ間では（シリンダ内圧力）＜
（水素供給圧力）の関係にあり、水素ガスがシリンダ内
に供給されるが、その後の線■におけるロー八間では（
シリンダ内圧力）〉（水素供給圧力）となるため、シリ
ンダ内空気が水素供給弁８を通じて供給管５に逆流する
ことになる。On the other hand, when the hydrogen supply pressure is as low as indicated by the line ■, while the cylinder pressure at the beginning of the compression process is low, that is, between E and E at the line ■, (cylinder pressure) <
(Hydrogen supply pressure), and hydrogen gas is supplied into the cylinder, but at the subsequent low eight points on the line ■, (
Since the cylinder internal pressure)>(hydrogen supply pressure), the cylinder internal air flows back into the supply pipe 5 through the hydrogen supply valve 8.
水素ガス供給管５に設けた逆止弁１０は、このような場
合のシリンダ内空気の逆流を防止するものである。The check valve 10 provided in the hydrogen gas supply pipe 5 prevents the air in the cylinder from flowing backward in such a case.
以上に詳述したように、本発明の水素エンジンにおいて
は、負荷率に応じて圧力を調整した低圧水素ガスのシリ
ンダ内への供給を吸気管とは別個の水素ガス供給管を通
じて行い、吸気弁と水素供給弁との開弁期間に相互に重
なりがないように構成したので、吸排気弁のみを備えた
２弁弐の場合に比して容積効率の低下がな《、また逆火
も生じるようなことがな《、低圧水素を燃料として極め
て能率よ《運転できる水素エンジンを得ることができる
。As detailed above, in the hydrogen engine of the present invention, low-pressure hydrogen gas whose pressure is adjusted according to the load factor is supplied into the cylinder through a hydrogen gas supply pipe that is separate from the intake pipe. Since the opening periods of the hydrogen supply valve and the hydrogen supply valve do not overlap with each other, there is no reduction in volumetric efficiency compared to the case of a two-valve system with only intake and exhaust valves, and there is no risk of backfire. Without this, it is possible to obtain a hydrogen engine that can be operated extremely efficiently using low-pressure hydrogen as fuel.
第１図は本発明に係る水素エンジンの構成図、第２図は
上記水素エンジンにおける各弁の開閉時期についての説
明図、第３図は圧縮過程におけるシリンダ内圧力及び水
素供給圧力の関係についての説明図である。
１……ピストン、２……シリンダ、３……排気管、４…
…吸気管、５……水素ガス供給管、６……排気弁、７一
…吸気弁、８……水素供給弁、９……圧力調整弁、１０
……逆止弁、１１…ｗ点火栓。Figure 1 is a configuration diagram of a hydrogen engine according to the present invention, Figure 2 is an explanatory diagram of the opening and closing timing of each valve in the hydrogen engine, and Figure 3 is an illustration of the relationship between cylinder internal pressure and hydrogen supply pressure during the compression process. It is an explanatory diagram. 1...Piston, 2...Cylinder, 3...Exhaust pipe, 4...
...Intake pipe, 5...Hydrogen gas supply pipe, 6...Exhaust valve, 7-...Intake valve, 8...Hydrogen supply valve, 9...Pressure adjustment valve, 10
...Check valve, 11...W spark plug.
Claims (1)
ガスを供給する水素ガス供給管を接続して、これらの各
管にそれぞれ排気弁、吸気弁、及び水素供給弁を設け、
吸入過程の終期において下死点で閉じる吸気弁と、その
下死点で開いて点火前に閉じる水素供給弁との開弁期間
を、相互に重なりがないように設定し、上記水素ガス供
給管に出力制御用の圧力調整弁を設け、水素ガス供給管
における水素供給弁の近傍に逆止弁を設けたことを特徴
とするシリンダ内噴射式水素エンジン。1. An exhaust pipe, an intake pipe, and a hydrogen gas supply pipe for supplying low-pressure hydrogen gas are connected to the head of the cylinder, and each of these pipes is provided with an exhaust valve, an intake valve, and a hydrogen supply valve, respectively.
The opening periods of the intake valve, which closes at bottom dead center at the end of the intake process, and the hydrogen supply valve, which opens at bottom dead center and closes before ignition, are set so that they do not overlap with each other, and the hydrogen gas supply pipe An in-cylinder injection hydrogen engine, characterized in that a pressure regulating valve for output control is provided in the hydrogen gas supply pipe, and a check valve is provided in the vicinity of the hydrogen supply valve in the hydrogen gas supply pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52117679A JPS5812458B2 (en) | 1977-09-30 | 1977-09-30 | In-cylinder injection hydrogen engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52117679A JPS5812458B2 (en) | 1977-09-30 | 1977-09-30 | In-cylinder injection hydrogen engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5452203A JPS5452203A (en) | 1979-04-24 |
| JPS5812458B2 true JPS5812458B2 (en) | 1983-03-08 |
Family
ID=14717596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52117679A Expired JPS5812458B2 (en) | 1977-09-30 | 1977-09-30 | In-cylinder injection hydrogen engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5812458B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5271359A (en) * | 1990-11-20 | 1993-12-21 | Mazda Motor Corporation | Gas fuel engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572297A (en) * | 1970-01-26 | 1971-03-23 | Schoeppel Roger J | Hydrogen fueled internal combustion engine |
-
1977
- 1977-09-30 JP JP52117679A patent/JPS5812458B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572297A (en) * | 1970-01-26 | 1971-03-23 | Schoeppel Roger J | Hydrogen fueled internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5452203A (en) | 1979-04-24 |
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