JPS58128588A - Electromagnetic hydrogen gas injection valve - Google Patents

Abstract

PURPOSE:To effectively cool the valve by a method wherein hydrogen gas itself is used as cooling medium in the electromagnetic hydrogen gas injection valve. CONSTITUTION:Hydrogen gas is introduced, through a connector pipe 21, from a supply port 20 to the recess 26 of an armature plunger 7 and, after that, through communicating passages 22, 23 and 24, to a chamber R and further, through a communicating passage 25, to a hydrogen gas well 13. Heat is absorbed to the hydrogen gas during passing from the supply port 20 to the well 13. Because the heat conductivity of hydrogen gas is 7-8 times larger than that of air, the cooling effect due to hydrogen gas is higher than that due to air and furthermore the simplification of device and lowering of heat loss are resulted, because the hydrogen gas, which is used for combustion, is used for cooling as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic hydrogen gas injection valve used in a hydrogen engine, and more particularly to an electromagnetic hydrogen gas injection valve that performs self-cooling using hydrogen gas.

Although many proposals have been made for spark ignition engines that use hydrogen gas as fuel, it is difficult to control the supply of low-pressure hydrogen gas in a predetermined amount for a short period of time at the beginning of the compression stroke, and the technology has not yet been fully expanded. Does not exist. One of the reasons for this is that good hydrogen gas injection valves have not yet been developed.

Electromagnetic injection valves are well known as general fuel injection valves, but hydrogen gas injection valves, especially for hydrogen gas with K i 1w/cj or less, are low-pressure hydrogen gas injection valves with high-speed response,
■ Durability (heat resistance), ■ Sealing performance The purpose of the present invention is to effectively cool the valve to improve its durability, and to improve the sealing performance by sealing only the fixed part. There is a valve to provide.

This will be explained in detail below.

The electromagnetic hydrogen gas injection valve of the present invention has a structure that injects hydrogen gas directly into the cylinder of an engine. For this reason, in addition to the heat generated by the coils, sliding parts, etc., there is also heat transfer from the engine, resulting in extremely high temperatures.

However, electromagnetic hydrogen gas injection valves have to have a structure that cools them efficiently to prevent them from breaking down, and on the other hand, they also have the problem of preventing hydrogen gas from leaking.

Therefore, in the present invention, attention is paid to the use of the hydrogen gas itself supplied into the cylinder as a cooling medium, and the seal is used only as a static part, and all dynamic parts serve as communication passages into the cylinder.

This will be explained below using figures.

The valve casing 1 consists of a cylindrical cap 2 and a holding part 3. The holding part 3 has a coil mounting body 4, a coil 5,
An armature pusher 7 is provided inscribed in the liner 6 and is attached to the armature. Intermediate rod 1 is inserted into thrust rod 8
0 is fitted, and the intermediate rod 10 is in contact with the valve rod 11.

A chamber body 14 that forms a hydrogen gas reservoir 15 is provided on the inner periphery of the skirt 12 of the holding part 3, and a valve rod 11 is provided in the chamber body 14.
A sliding portion 15 and a valve opening 16 through which hydrogen gas is injected are installed. The valve opening 16 is opened and closed by a valve 17 formed at the tip of the valve rod 11. A washer 18 is fixed to the valve rod 11, and a spring 19 is attached to the top surface of the cap 2. A communication path 25 communicating with the chamber R is provided.

One or more communication passages 22 to 25 are provided, preferably two or more, equally divided on the circumference for balance.

The seal is provided at the location indicated by S in the figure, and each 8 is provided at a stationary fixed part. The operation of the injection valve of the present invention, in which a recess 26 is formed in the top surface of the chair plunger 7 and a bump 28 is arranged opposite to the eastern edge 27 of the periphery, will be described below.

When no current is flowing through the coil 5, the spring 19 pushes the valve rod 11 upwards and the valve 17 closes the valve opening 16.

Now, when current flows through the coil 5, the coil 5 is excited,
Push down the armature plunger 7. Then, the intermediate rod 10 is pushed down via the push rod 8, and the valve rod 11 is pushed down against the spring 19. Valve 17 therefore opens valve opening 16 . Then, the hydrogen gas in the hydrogen gas reservoir 1S is injected into the cylinder as indicated by arrow P in the figure. When the current to the coil 5 is cut off, the spring 19 pushes the valve rod 11 upward, the valve 17 closes the valve opening 16, and the injection of hydrogen gas ends.

Now, the electromagnetic hydrogen gas injection valve of the present invention is directly inserted and held into a cylinder. and at least valve 17
The valve opening 16 is exposed to high-temperature gas in the cylinder of an internal combustion engine (not shown).Furthermore, since the rotation is performed at a maximum of 6000 revolutions per minute, a large amount of heat is generated from the sliding parts.

Also, heat is generated from the coil 5.

Therefore, there is a risk that a large amount of heat may be generated inside the valve casing 1, leading to a decrease in heat generation. However, in the present invention, since the inside of the valve casing 1 is cooled with hydrogen gas as described below, these drawbacks can be avoided. can be eliminated.

Hydrogen gas enters the conduit 15 through the conenerta pipe 21 from the supply port 20 into the recess 26 of the armature pusher 7. They absorb heat as they flow.

The effects of the present invention, which is constructed and operated as described above, are as follows.

The thermal conductivity of hydrogen gas is 7 to 8 times that of air.

Since the hydrogen gas is made to flow through the valve casing from one end to the other, the heat within the valve casing can be completely dissipated, and the heat is not concentrated in the negative part.

Since hydrogen gas always flows near the heat-generating area and the heat-conducting surface, heat absorption efficiency is high.

Even if hydrogen gas were to leak through a moving part or a sliding part, the leaked hydrogen gas would always be contained in the flow passage because the moving part or sliding part was always inside the hydrogen gas flow passage. It becomes.

The seals 8 are provided between all stationary members, improving sealing performance.

Improved cooling performance improves durability and reliability.

[Brief explanation of the drawing]

The figure is a sectional view showing one embodiment of the present invention.

Claims (1)

[Scope of Claims] A coil, an armature plunger, and a valve are provided in a valve casing, and the armature plunger and the valve are interlocked and connected by a connecting means, and the valve is connected to the valve casing. At one end; a hydrogen gas injection device that opens and closes a formed valve opening in conjunction with the movement of the armature plunger so that hydrogen gas is sealed in the valve casing by the valve opening and the valve; An electromagnetic hydrogen gas injection valve, characterized in that a hydrogen gas supply port is provided at an end of the valve casing opposite to the valve opening, and the armpit supply port and the valve opening are connected through a communication path. .