JPS5830736Y2 - rear engine bus - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the improvement of a so-called rear-engine bus, in which the engine, radiator, etc. are located at the rear of the vehicle body.

Konoma's buses use a forced-circulation liquid cooling method to cool the engine.

Therefore. When the outside air temperature is low, such as in the winter, the coolant flowing through the radiator is supercooled by the low temperature outside air immediately after the engine starts, causing poor engine operation and increasing cylinder wear.

Furthermore, in order to prevent the coolant from overheating in this type of bus during the Q period, a partition wall is installed between the engine and the radiator, and in the winter, the partition wall draws outside air warmed by the heat of the engine into the engine room. This prevents the coolant from being conducted to the radiator, which not only makes it impossible to bring the coolant to an appropriate temperature in a short period of time after starting the engine, but also causes the coolant to become even more overcooled.

The purpose of this invention is to introduce outside air directly or through the engine room to the radiator depending on the outside temperature, to bring the engine coolant to the appropriate temperature in a short time after the engine starts, and to make the engine run smoothly. To provide a rear engine type bus which prevents overheating of an engine coolant in the summer and overcooling of the engine coolant in the winter, and reduces cylinder wear and fuel consumption.

With these issues in mind, this rear-engine HAS was developed with an engine placed at the rear of the vehicle body.

A radiator is placed at the rear of the car body at an appropriate distance from the engine and parallel to the engine, and outside air is taken in through an intake port formed on the rear side of the car body in front of the radiator. The outside air is guided to the radiator.

and an outside air duct disposed at the rear of the vehicle body at an appropriate distance from the engine so as to isolate the radiator from the engine, the opening of which isolates the radiator from the engine. A configuration formed on a side wall of the outside air duct and attached to the side wall such that the flap opens and closes the opening and, when opened, is rotated in a direction to block outside air flowing from the outside air intake to the radiator. I have to.

Hereinafter, preferred specific examples of the rear engine bus according to this invention will be described with reference to the drawings.

FIG. 1 shows the rear part of a first specific example 10 of the rear engine bus of this invention.

The bus 10 has an engine 12 and a transmission 13 arranged slightly toward one side of the rear of the vehicle body 11,
Further, a radiator 14 is arranged on the other side of the rear portion of the vehicle body 11 at an appropriate distance from the engine 12 and in parallel to the engine 12.

In the bus 10, an outside air intake port 18 is formed on the front side of the radiator 14, on the side surface 15 on the radiator side at the rear of the vehicle body 11, and an exhaust port 19 is formed on the rear surface 17 on the radiator side of the vehicle body 11. Exhaust ports 20 are formed in the engine-side side surface 16 at the rear of the vehicle body 11, respectively.

The bus 10 also includes an outside air duct or an outside air chamber 21 at the rear of the vehicle body 11 in front of the radiator 14 for guiding outside air taken in from the outside air intake 18 to the radiator 14.
4 is isolated.

In particular, the side wall or bulkhead 22 of the fresh air duct or fresh air chamber 21 separating the radiator 14 from the engine 12 is spaced from the engine 12 at a suitable distance.

The partition wall 22 has an opening 23 formed by a cutout,
A flap 24 is arranged in the opening 23.

The flap 24 is connected to the bulkhead 22 through a bottle (not shown).
It is designed to open and close the opening 23 and to block the flow of outside air from the outside air intake port 18 to the radiator 14 .

In addition, this bus 10 has a cooling fan 25 arranged behind the radiator 14, and the cooling fan 25 is
- driven by the engine 12 via the belt 26;
A cooling shroud (not shown) is disposed between the radiator 14 and the cooling fan 25.

Since the bus 10 is configured as described above, if the outside temperature is low, such as in the winter, the flap 2
4 is rotated in the dotted line position shown in FIG.
On the other hand, from the outside air intake 18 to the radiator 14
Blocking the flow of outside air to.

When the engine 12 is started in such a state, the cooling fan 25 is rotated, so outside air flows into the engine room from the bottom of the engine, and the engine 12 is started.
At that time, the air is heated by the engine 12, and further flows from the opening 23 through the outside air duct 21 to the radiator 14.

When the outside air heated by the engine 12 flows through the radiator 14, it exchanges heat with the coolant flowing inside the radiator 14, thereby warming the coolant.

The outside air that has undergone heat exchange with the radiator 14 is discharged from the vehicle body through the exhaust ports 19 and 20, that is, into the atmosphere.

Therefore, after the engine is started, the coolant in the engine 12 reaches an appropriate temperature in a short time, allowing the engine 12 to operate smoothly.

In addition, if the temperature of the outside air in the IC1 is high in the summer, the flap 24 closes the opening 23, so when the engine 12 is started, the cooling fan 25 is rotated, so the outside air is taken in. Air flows from the opening 18 through the outside air duct 21 and through the radiator 14 .

At that time, the outside air exchanges heat with the coolant flowing inside the radiator 14, cooling the coolant, and a part of the outside air is transferred to the exhaust port 1.
The rest of the outside air flows into the engine room, flows around one part of the engine 12, cools the engine 12, and is then released into the atmosphere from the exhaust port 20.

Thus, when the temperature of the outside air is high, the outside air passes through the radiator 14 in the same way as in the case of a normal bus, and
It flows through one portion of the engine 12.

2 and 3 show the z-th Jj integrated side 30 of the rear-engine bus of this invention, and this bus 30 is
In the bus 10 shown in the figure, the flap 24 of the outside air guest 21 is manually opened depending on the outside air temperature.

This bath 30 has a plurality of notched holes 32, 33, 3 so as to determine the opening position of the flap 24 according to the outside temperature.
4.35 into the top wall 31 of the outside air duct 21, and the notched holes 32, 33, 34.

The notch 36 is inserted into one of the openings 35 and the flap 24 is set at an appropriate opening position.

The notch hole 32 is the fully closed position of the flap 24, the notch hole 35 is the fully closed position of the flap 24 on the outside air intake side, and the notch holes 33 and 34 are for determining the intermediate opening position of the flap 24.

Further, the other configurations of this bus 30 are the same as the configuration of the corresponding bus 10 shown in FIG. 1, so the same reference numerals are given and the explanation will be omitted.

Since the bus 30 is configured in this way, this bus 3
Compared to the bus 10 shown in FIG. 1, the engine 0 quickly brings the coolant of the engine 12 to an appropriate temperature after starting the engine according to the outside air temperature in cold weather, and improves the warm-up characteristics and idling characteristics of the engine 12.

According to this invention described above, an outside air duct is provided in front of the radiator to [guide the outside air taken in from the outside air intake hole formed on the rear side of the body to the radiator, and
located at the rear of the vehicle body at a suitable distance from the engine to isolate the radiator from the engine; , the flap opens and closes its opening, and when opened, is attached to its side wall so that it is rotated in a direction that blocks outside air flowing from its outside air intake to its radiator, depending on the outside air temperature. For example, depending on the summer or winter, outside air is guided into the radiator either directly or through the engine room, and after the engine starts, the engine coolant is brought to the appropriate temperature in a short time, making engine operation smoother. This prevents the engine coolant from overheating, and in the winter, it prevents the engine coolant from overcooling, which improves engine warm-up and idling characteristics, improving cylinder wear and fuel consumption are reduced, further improving practicality.

[Brief explanation of the drawing]

FIG. 1 is a partial schematic diagram of a first specific example of a rear engine bus according to this invention, FIG. 2 is a partial schematic diagram of a second specific example of a rear engine bus according to this invention, and FIG. FIG. 3 is a perspective view of a notch used in the rear-engine bus shown in FIG. 2; 10-9. ...Rear engine type Hass, 11...
・Vehicle body, 12...Engine, 13...
Transmission, 14...Radiator, 1
8... Outside air intake port, 19... Exhaust port, 20... Exhaust port, 21... Outside air chamber, 22... Partition wall, 23...Opening, 24...Flap.

Claims (1)

[Claims for Utility Model Registration] An engine located at the rear of a vehicle body, and a radiator located at the rear of the vehicle body at an appropriate distance from the engine and in parallel with the engine. In front of the radiator, the outside air taken in from the outside air intake formed on the rear side of the vehicle body is guided to the radiator, and the radiator is isolated from the engine by an appropriate distance. and a fresh air duct located at the rear of the vehicle body, an opening is formed in the side wall of the fresh air duct separating the radiator from the engine, and a flap opens and closes the opening, and A rear-engine bus is mounted on a side wall of the bus so that when opened, the bus is rotated in a direction to block outside air flowing from the outside air intake to the radiator.