JP2604441B2 - Hydrogen engine intake cooling mechanism - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an intake air cooling mechanism for a hydrogen engine.

[Prior Art] In general, in a premixed hydrogen engine, fuel efficiency in an air-fuel mixture becomes a problem due to its structural characteristics. Therefore, as shown in FIG. 4, the compressor 4 and the turbine 5 provided in the intake-side pipe 2 and the exhaust-side pipe 3, respectively, in order to send a large amount of air into the engine following a gasoline engine or the like. It is conceivable that the supercharger 6 is configured to increase the amount of air taken into the engine 1 by the supercharger 6 to improve the output of the engine 1.

However, in the above configuration, when the engine 1 is under a high load, that is, when the rotation speed of the compressor 4 increases as the rotation amount of the turbine 5 increases with an increase in the displacement, the temperature of the air sent from the compressor 4 becomes 100 ° C. May reach.

As a result, the high-temperature air-fuel mixture explodes in the carburetor 8 before reaching the engine 1, often causing a so-called flashback, which causes the engine 1 to stop or the output to decrease. For this reason, it is necessary to interpose an intercooler 9 between the compressor 4 and the carburetor 8 to reduce the pressure of the air fed to the carburetor 8 to about 40 ° C.

[Problems to be Solved by the Invention] However, in a hydrogen engine system, an alloy tank for storing a metal hydride is separately provided, and hydrogen gas is obtained by heating the metal hydride inside the alloy tank. The provision of the alloy tank and the hydrogen supply path 8a connected thereto requires space and makes the entire apparatus large, and furthermore, the alloy tank and the path
The use of the intercooler 9 in addition to 8a causes a rise in cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to increase the fuel efficiency of a hydrogen engine and to reduce the cost by utilizing the heat exchange action at the time of generating hydrogen gas by the driving device. Another object of the present invention is to provide a hydrogen engine intake cooling mechanism which can reduce the size and size of the device, and is effective for preventing flashback when the engine is driven.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an engine, a carburetor communicating with the engine, and a rotation in accordance with rotation of a turbine in an intake-side pipe of the engine,
This compressor cools the air by heat exchange between a compressor that compresses air and sends it to the engine side and air that is disposed downstream of the compressor in the intake-side pipe line and that is heated during compression by the compressor. The gist of the present invention is to provide a cooler for containing a metal hydride that releases hydrogen gas mixed with air in the carburetor.

[Operation] By adopting the above means, the air heated in a large amount by the compressor and heated by the compressor is cooled by heat exchange with metal hydride in the cooler. Further, during this heat exchange, the metal hydride releases hydrogen gas, and the hydrogen gas and the cooled air are mixed and sent to the engine.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, a compressor 4 and the same rotating shaft 7 as a compressor 4 are respectively provided on an intake pipe 2 and an exhaust pipe 3 of the engine 1.
The turbine 5 is operatively connected to the supercharger 6, and the supercharger 6 is constituted by the two 4,5. And the intake side pipeline 2
Is provided with a cooler 10 downstream of the compressor 4.
As shown in FIG. 2, a plurality of radiating fins 12 are provided on the outer peripheral surface of the intake-side pipe 2 in the cooler 10 and protrude into the cooler 10. Also the cooling machine
A metal hydride 13 containing hydrogen is accommodated in 10 and, when heated, emits hydrogen gas. That is,
When the air that is heated at the time of compression in the compressor 4 and flows through the intake-side pipe 2 passes through the cooler 10, the metal hydride 13 is heated through the radiating fins 12 to release hydrogen gas, This hydrogen gas is passed through the gas line 11 to the carburetor 8
Sent inside. The air flowing in the intake pipe 2 is heated up to about 100 ° C. when compressed in the compressor 4, but is heated up to about 40 ° C. due to the heat exchange effect when the metal hydride 13 releases hydrogen gas. The temperature is lowered and flows into the carburetor 8.

In the carburetor 8, compressed air sent from the intake pipe 2 and hydrogen gas sent from the gas pipe 11 are mixed, and this air-fuel mixture is burned through an intake manifold in the engine 1. After being sent to the chamber and burned, it is discharged into the exhaust side pipe 3 and turns the turbine 5. Then, this power is transmitted to the compressor 4, and the compressor 4 rotates to compress air, and compressed air is sent into the carburetor 8.

As described above, in the present embodiment, when the fuel efficiency is increased by pumping a large amount of air into the carburetor 8 using the supercharger 6, the fuel volume (hydrogen gas volume) is increased.
Addressing the problem of a premixed hydrogen engine, which would be larger. When the air is compressed in the compressor 4, the temperature of the air rises, but the air is cooled by heat exchange with the metal hydride 13 in the cooler 10 provided in the lower stage of the compressor 4. Therefore, not only is the structure of the cooler 10 extremely simple, but also it is possible to prevent hot air from entering the carburetor 8 and causing flashback.

In addition, since the hydrogen gas generated in the cooler 10 is sent to the carburetor 8 by heat exchange between the compressed air and the metal hydride 13, the alloy containing metal hydride in a general hydrogen engine driving device is used. Since the tank can be omitted, the size of the entire apparatus can be reduced and the cost can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG.

In this embodiment, in addition to the configuration of the first embodiment, a cooler 14 is provided between the engine 1 and the turbine 5 in the exhaust line 3.
Is arranged. The cooler 14 has the same configuration as the cooler 10 in the intake-side pipe 2, and is connected to the carburetor 8 via the gas pipe 15.

When the air-fuel mixture burned in the engine 1 flows through the exhaust-side pipe 3 and passes through the cooler 14, the metal hydride in the cooler 14 is heated to release hydrogen gas, and the carburetor 8 And the cooled exhaust gas is discharged to the outside via the turbine 5. Thereby, the emission of high-temperature exhaust gas is avoided, and a large amount of hydrogen gas is supplied.When the hydrogen content of the metal hydride 13 in the one cooler 10 decreases, this can be compensated for. it can.

Note that the present invention is not limited to the above-described embodiment, and an alloy tank is provided, hydrogen gas is always supplied from the alloy tank, and the cooler 10 is used as a spare hydrogen gas generator. Any changes are of course possible without departing from the scope of the invention.

[Effects] As described in detail above, according to the present invention, the fuel efficiency is increased, and further, by utilizing the heat exchange action at the time of generating hydrogen gas, the cost is reduced and the size of the apparatus is reduced. And an excellent effect of preventing back flash from occurring.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of the present invention,
FIG. 2 is a partially cutaway perspective view showing the inside of the cooler, FIG. 3 is an explanatory view showing the second embodiment, and FIG. 4 is an explanatory view showing a conventional example. Engine ... 1, intake side pipeline ... 2, compressor ... 4, carburetor ... 8, metal hydride ... 13.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takashi Iwaki 2-1-1 Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Hiroyuki Suzuki 1-1-1 Edamitsu, Yawata-Higashi-ku, Kitakyushu-shi, Fukuoka Prefecture No. 1 Nippon Steel Corporation 3rd Technology Research Institute (72) Inventor Mitsuru Shibata 1-1 1-1 Edamitsu, Yawatahigashi-ku, Kitakyushu-shi, Fukuoka 1st Nippon Steel Corporation 3rd Technology Research Institute (72) Invention Person Kunitoshi Watanabe 1-1-1, Emitsu, Yawatahigashi-ku, Kitakyushu-shi, Fukuoka Prefecture Nippon Steel Corporation

Claims (1)

(57) [Claims] An engine, a carburetor communicating with the engine, a compressor that rotates with a rotation of a turbine in an intake-side pipe of the engine, compresses air, and sends the compressed air to the engine, and the intake-side pipe. A metal hydride that is disposed downstream of the compressor in the passage and cools this air by heat exchange with air heated during compression by the compressor, and that releases hydrogen gas mixed with air in the carburetor. An intake air cooling mechanism for the hydrogen engine consisting of a cooling machine to house.