JPS628335Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an engine room ventilation system for automobiles, etc.

To reduce noise in automobiles, an engine enclosure system is used in which the engine is surrounded by a sound insulating plate and hermetically sealed. In this case, hot air is trapped inside the sealed engine room when the engine is stopped. This raised the possibility that the auxiliary equipment could become a cause of failure due to thermal effects.

The present invention solves these problems, and its feature is that it uses the existing intake duct to ventilate the hot air inside the engine room to the outside when the engine is stopped.

An embodiment in which the device of the present invention is applied to a rear engine bus will be described below with reference to the drawings.

In FIG. 1, 1 is a substantially sealed engine room, 2 is an engine, and 3 is an air cleaner.
Reference numeral 4 denotes an air intake duct connected to the air cleaner 3 and communicated with an air intake port 5 provided at the upper part of the ceiling.

In the present invention, an opening 6 communicating with the inside of the engine room 1 is provided in the intake duct 4, which is partially located inside the engine room 1, as shown in FIGS. 2 and 3. It is provided with an opening/closing lid 7 that is closed during operation and opened when stopped.

The means for opening and closing the opening/closing lid 7 at a specific time may be operated by a dedicated actuator 8 as shown in FIG. 2, or by attaching a balance weight 9 as shown in FIG. When the engine is in operation, it is closed by the suction negative pressure in the intake duct 4, and when the engine is stopped, it is opened by the gravity of the balance weight 9.

Since the present invention has the structure as described above, the intake duct 4 performs the intake action to the engine 2 through the air cleaner 3 as usual while the engine is operating, and the opening/closing cover 7 automatically opens when the engine is stopped. , the interior of the engine room 1 and the intake duct 4 are communicated through the opening 6. Therefore, the hot air in the engine room 1 is discharged to the outside air through the intake duct 4 to provide ventilation.

As described above, according to the present invention, ventilation in the sealed engine room is achieved by a simple structure in which the conventionally used intake duct has an opening that communicates with the engine room, and this opening has an opening/closing lid. It has the advantage that it can be obtained satisfactorily, solve the problems of the conventional method at once, and can be provided at low cost.

It should be noted that the present invention is not applied only to rear engine buses.

[Brief explanation of the drawing]

FIG. 1 is a rear side view of a rear engine bus showing an example of the installation location of the device of the present invention, and FIGS. 2 and 3 are sectional views of essential parts showing an embodiment of the device of the present invention. 1...Engine room, 2...Engine, 3...
...Air cleaner, 4...Intake duct, 6...Opening, 7...Opening/closing lid.

Claims (1)

[Scope of utility model registration request] An engine room ventilation system in which an opening that communicates with the engine room is provided in the intake duct connected to the air cleaner in the engine room, and an opening/closing lid that is closed when the engine is running and opened when the engine is stopped is attached to this opening. .