JPS601218Y2 - Engine room cooling air exhaust device for rear engine buses - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for discharging cooled air from the engine compartment of a rear engine bus.

Generally, in a rear engine bus, a radiator is installed on one side of the engine, and a muffler is installed on the other side of the engine, and the cooling air from the radiator is sucked in from one side of the vehicle body. That's what I do.

In order to reduce the external noise of such rear-engine buses, in recent years the engine room and radiator room have been separated, and an undercover has been installed in the engine room and radiator room.In order to prevent overheating in the engine room, the radiator room The exhaust air from the room is introduced into the engine room from the rear, and is discharged forward from the left and right outlets provided on both sides of the resin resin.

However, when the cooling air from the engine room is discharged forward in this way, as the bus moves, the cooling air (hot air) goes around the sides of the vehicle body, and is sucked into the radiator room again, causing the radiator air and water temperature to rise. may rise and cause various disorders.

This invention solves the above-mentioned conventional drawbacks and provides an engine room cooling air exhaust device for a rear engine bus that can prevent the hot air from blowing back as described above without impairing the cooling function in the engine room. It is something.

Hereinafter, this invention will be explained in detail based on two embodiments shown in the accompanying drawings.

In the figure, 1 is the body of a rear engine bus, and in the center of the rear part is an engine room 3 that houses an engine 2.
is formed.

. 4 is an under cover of the engine room 3.

5 is a radiator room formed on one side of the engine room 3, and includes a radiator room 6 and a cooling fan 7.
A suction port 8 is provided on the side of the vehicle body 1p.

Reference numeral 9 denotes a communication port that allows the rear end of the engine room 3 and the rear end of the radiator room 5 to communicate with each other.

Reference numeral 10 denotes a muffler for the engine 2, which is installed on the opposite side of the radiator room 5 across the engine room 3. A cleaner room formed above the muffler 10 houses an air cleaner, etc. (not shown). There is.

Note that a ventilation hole 13 is provided in the partition plate 12 that partitions the cleaner room 11 and the engine room 3, and
A ventilation port 14 that opens toward the muffler 10 is provided at the bottom of the cleaner room 1j, and a portion of the cooling air sent into the engine room 3 from the radiator room 5 through the communication port 9 is routed through the ventilation port 13. The flow is caused to flow into the cleaner room 11, and the muffler 10 is further flowed through the ventilation port 14.
I try to make it flow towards the direction.

Reference numeral 15 denotes a partition plate extending upward from both sides of the front end of the undercover 4, which is fixed to an auxiliary cloth (not shown), and is located at the front ends of the left and right passages formed on both sides of the engine 2.

The outflow ports 16 are each narrowed, and the opening area of the outflow port 16 near the radiator room 5 is made substantially smaller than the opening area of the outflow port 16 on the opposite side.

In the embodiment, the left and right outflow ports 16 have the same shape, so it is a radiator.

The partition plate 15 on the room 5 side is made larger than the other partition plate 15 to substantially reduce its opening area, and the outlet ports 16 are both narrowed to reduce their opening area.
In addition, the opening area of the outlet 16 on the radiator room 5 side is made smaller than that on the other side.

If so, the shape of the starting plate 15 is arbitrary.

17 is the floor panel 1.・This is the front wall hanging down from 8.

Further, a cooling air outlet 19 is provided on the side surface of the undercover 41 on the muffler 0 side, and the cooling air in the engine room 3 is also discharged from this outlet 19.

In such a configuration, when the engine 2 is operated, F,
77 rotates, the radiator is removed from one side of the car body 1.
Cooling air is sucked into the room 5, cools the radiator 6, and then is sent to the rear part of the engine room 3 through the communication port 9.

The cooling air sent into the engine room 3 moves forward inside the engine room 3 due to its wind pressure and moves forward inside the engine room 3. The inside is cooled and flows out forward from the left and right outlet ports 16 narrowed in the partition plate 15.

Further, a part of the cooling air sent into the engine room 3 cools the inside of the engine room 3 and is then discharged from the discharge port 19 toward the muffler 10, and from the ventilation port 13 to the cleaner room 11 and the ventilation port 14. Since the water is discharged from above toward the muffler 10 through the air, the muffler 10 can also be cooled.

When discharging such cooling air, the outlet ports 16 provided on both sides of the engine 2 are narrowed by the partition plates 15, and the actual opening area of the outlet port 16 on the radiator room 5 side is smaller than that of the other outlet port 16. Since it is formed small, most of the hot air that cools the inside of the engine room 3 is discharged toward the muffler 10 side of the vehicle body 1, and not much of it is discharged toward the radiator room 5 side.

Therefore, the amount of cooling air (hot air) blown back into the radiator room 5 as the vehicle travels is extremely small and does not adversely affect the cooling of the radiator 6.

Note that the ventilation inside the engine room 3 is ensured by the discharge port 19, and since the outlet 1:6 is substantially opened, albeit slightly, at the front end of the engine room 3, the inside of the engine room 3 is Never fall into overheating condition.

Further, in the above embodiment, the exhaust air from the radiator room 5 is used as cooling air in the engine room 3, but both rooms 3 and 5 are completely shut off and auxiliary air is supplied from the rear of the vehicle body 1. Cooling air may be introduced into the engine room 3 using a fan, and the sizes of the outlet, partition plate, discharge port, etc. may be appropriately set depending on the flow rate of the cooling air of the engine room ladle.

As explained above, this invention can prevent the cooling exhaust air from the engine compartment from being re-inhaled into the engine compartment without impairing the cooling function in the engine compartment, and can also prevent the muffler, which is prone to overheating, from being re-inhaled. This allows for forced cooling.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the main part showing an embodiment of this invention, Fig. 2 is a sectional view taken along the line n-■ in Fig. 1, and Fig. 3 is a sectional view taken along m-m in Fig. 2.
: A cross-sectional view, and FIG. 4 is a blind view of FIG. 1. 2... Engine 3... Engine room, 4... Under cover, 5------
Radiator room, 10...Muffler 15.
...Partition plate, 16... Outlet, 19...
...Discharge port.

Claims (1)

[Scope of utility model registration request] A radiator room is formed on one side of the engine room equipped with an under cover, and a muffler is installed on the opposite side of the radiator room. In a rear engine bus configured to discharge air forward from an outlet, a cooling air outlet is provided on the muffler side side of the undercover, and the opening area of the outlet located on the radiator room side is larger than the other side. Discharge of cooling air from an engine room in a rear engine bus, characterized in that a partition plate is provided at the front end of the undercover to narrow the respective outlet openings so that the opening area of the outlet openings is substantially smaller than the opening area of the outlet openings of the rear engine bus. Device.