JPS6120245Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an engine cooling system.

Generally, the amount of heat generated by combustion in an engine varies depending on the operating condition of the engine, but about one-third of the amount of heat generated by combustion is released to the outside as exhaust heat. Therefore, the amount of heat radiated from the exhaust manifold is large, and is the main cause of overheating in the engine room.

In particular, in vehicles equipped with various exhaust and safety measures, cab-over type vehicles, sound insulation plates for noise reduction measures, vehicles equipped with engine enclosures, etc., the air circulation in the engine room is poor, and the above factors can occur. This tends to cause the engine compartment to overheat.

Overheating in the engine compartment not only causes the engine to overheat, but also when the engine is stopped after driving, the fuel temperature in the fuel system in the engine compartment increases, causing paper lock, percolation, etc., and hindering restart. Various inconveniences occur.

In view of the above points, the present invention aims to provide an engine cooling device that prevents the engine room from becoming high temperature by efficiently discharging heat emitted from the exhaust manifold to the outside.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

In FIGS. 1 and 2, 1 is an enclosure, and 2 is an engine housed in the enclosure 1. The engine 2 includes an engine body 5 consisting of a cylinder head 3 and a cylinder block 4, and the cylinder An air cleaner 7 that communicates with the intake port 6 of the cylinder head 3, an intake manifold 9 that communicates with the carburetor 8, and an exhaust manifold 11 that communicates with the exhaust port 10 of the cylinder head 3.
It is composed of etc.

The exhaust manifold 11 is provided with an exhaust system cover 12 that covers substantially the entire circumference thereof, and is communicated via a duct 16 with an intake system cover 15 that covers the carburetor 8 and the intake manifold 9. A fan 13 is provided at an upstream position of the intake system cover 15 and is capable of blowing air in both directions, pushing in and sucking out air by rotating in the forward direction and in the reverse direction. Exit 1
4, the liquid is discharged outside the enclosure 1.

Therefore, in the above configuration, air from outside the enclosure 1 is sucked in by forward rotation of the fan 13 and sent into the intake system cover 15, and after cooling the exhaust manifold 11 within the exhaust system cover 12, the air is removed from the enclosure. 1 Discharge outside. Therefore, the heat dissipated by the exhaust manifold 11 is discharged outside the enclosure 1 without being led to the intake system, and the inside of the enclosure 1 is not overheated more than necessary. Moreover, since the carburetor 8 and the like are covered with the intake system cover 15 and receive air from the fan 13,
It is not affected by the heat inside the enclosure 1, and park collection etc. can be reliably avoided.
In addition, as a result of being able to prevent overheating in the enclosure 1 as described above, the engine 2 can be moved into the enclosure 1.
can be completely covered. On the other hand, if the engine 2 is cold at the time of startup, the heat emitted from the exhaust manifold 11 can be guided to the intake system by rotating the fan 13 in the opposite direction, thereby promoting warm-up.

In addition, instead of the duct 16, the Rotsuka cover 1 is used.
7 may have a double structure and a duct may be provided. This allows rocker noise to be further reduced.

As is clear from the above description, the present invention has the following effects.

(1) The exhaust manifold, which is the largest heat source in the engine room, can be effectively cooled, and the exhaust system cover can thermally isolate the exhaust system from the inside of the enclosure. It can prevent the heat from dissipating.

(2) It is possible to completely cover the engine with the enclosure, and the exhaust system cover covers the exhaust manifold, which accounts for approximately 15% of the engine noise generation, so it has a high sound insulation effect.

(3) Not only does the intake system such as the carburetor not receive direct heat from the exhaust system, but it is also thermally isolated from the inside of the enclosure by the intake system cover and is not affected by the heat inside the enclosure. Therefore, percolation etc. can be reliably avoided.

(4) By rotating the fan in the opposite direction, heat from the exhaust manifold can be guided to the intake system, facilitating cold starting and promoting warm-up.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention;
FIG. 2 is a sectional view taken along the - line in FIG. 1. 1...Enclosure, 2...Engine, 5...
... Engine body, 6 ... Intake port, 8 ... Carburetor, 9 ... Intake manifold, 10 ... Exhaust port, 11 ... Exhaust manifold, 12 ... Exhaust system cover, 13 ... Fan, 14 ... Exhaust Exit 15...
...Intake system cover, 16...Duct, 17...Rotsuka cover.

Claims (1)

[Scope of utility model registration request] An enclosure housing the engine, an intake system cover that covers the intake manifold, etc., an exhaust system cover that communicates with the intake system cover via a duct and covers the exhaust manifold, etc., and exhausts the air in both the covers. An engine cooling device comprising a fan, the air intake and discharge ports of the fan are respectively disposed outside the enclosure, and the fan is wired so as to be able to blow air in both directions.