JPH0537539U - Rear engine type vehicle cooling system - Google Patents

Abstract

(57) [Summary] [Purpose] Cool the transmission and its surroundings with a simple mechanism. [Structure] A ventilation port 21 for taking in the traveling wind W ₁ is provided at a side of a transmission 6 arranged at a front portion of an engine 4. An air guide plate 22 that guides the traveling wind W ₂ upward is provided below the transmission 6. The side wall 30 of the engine room 9 is provided with a discharge port 23 for discharging the taken-in outside air (W).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cooling device for cooling a transmission of a rear engine type vehicle.

[0002]

[Prior Art]

 As shown in FIGS. 5 to 7, in a rear engine type vehicle, for example, a large-sized bus, an engine 4 is mounted behind a rear wheel 3 which is a rear portion 2 of a vehicle body 1, and a clutch (housing) 5 is provided in a front portion thereof. The transmission 6 and the transmission shaft 7 are sequentially arranged to transmit the rotational driving force to the axle 8 of the rear wheel 3. The engine 4 is surrounded by a wall plate 10 that divides an engine room 9, and is also separated from the transmission 6 by a partition wall 11. The transmission 6 is surrounded by a side plate (frame) 12 of the vehicle body 1 on the side and an inner floor plate 13 on the upper side, and a frame joist 14 is provided in the front.

[0003]

[Problems to be solved by the device]

By the way, in the above-mentioned conventional vehicle body structure, the outside air (the traveling winds W ₁ and W _{2 on} the side and the lower portion of the vehicle body 1) which is effective for cooling the engine 4, the clutch housing 5, and the vicinity of the transmission 6 is hard to enter, so The temperature rises, the temperature of the lubricating oil of the engine 4 and the transmission 6 rises, and the deterioration of the lubricating oil is accelerated, which in turn shortens the life of the device itself.

Therefore, conventionally, with respect to the transmission 6, a pump is attached to the transmission 6 and the lubricating oil is cooled by an oil cooler, which is a large scale. Further, the temperature around the clutch housing 5 also rises, which is one of the causes of shortening the life of the clutch. The rise in ambient temperature reaches the problem of thermal degradation due to the rise in temperature of surrounding equipment parts.

In view of the above circumstances, the present invention was devised to provide a cooling device capable of cooling the transmission and its surroundings with a simple mechanism.

As a technique to be compared with the present invention, "fan shroud used for rear engine bus" (Japanese Utility Model Laid-Open No. 59-117835), "Engine around rear engine bus and engine supplement" "Cooling device for machine parts" (Japanese Utility Model Publication No. 59-70024) and "Cooling structure for engine room" (Japanese Utility Model Publication No. 1-70619), both of which are configured for cooling the engine room. Therefore, it is considered insufficient to solve the above problems.

[0007]

[Means for Solving the Problems]

 According to the present invention, a ventilation port for taking in traveling wind is provided on the side of the transmission arranged at the front of the engine, an air guide plate for guiding the traveling wind upward is provided at the bottom of the transmission, and at the engine side, It is provided with an outlet for discharging the outside air taken in.

[0008]

[Action]

 With the above structure, the ventilation port takes in the traveling wind passing through the side of the vehicle body, and the baffle plate takes in the traveling air passing under the vehicle body to cool the transmission and its surroundings. The discharge port smoothly discharges the outside air after cooling.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a cooling device for a rear engine type vehicle according to the present invention. The same components as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted.

In this cooling device, a ventilation port 21 for taking in the side traveling wind W ₁ is provided at the side of the transmission 6 arranged at the front part of the engine 4, and at the bottom of the transmission 6 there is a lower part. An air guide plate 22 for guiding the traveling wind W ₂ upward is provided, and an exhaust port 23 for exhausting the taken-in outside air (W) is provided on the engine 4 side.

As also shown in FIG. 2, the ventilation port 21 is formed in the side plate 12 of the vehicle body 1, and the louver 24 for facilitating entry of the side traveling wind W ₁ and the incoming outside air are guided to the transmission 6. And a side baffle plate 25 for The louver 24 is formed by arranging a plurality of vertically long plates 26 (four in the illustrated example) side by side, and is attached so as to face inward and obliquely rearward. The side baffle plate 25 is attached to the rear end of the ventilation port 21, and is bent and extended from the rear to the inside.

As shown in FIG. 3, the baffle plate 22 is supported by a support plate 28 attached to the lower surface of the housing 27 of the transmission 6, and is formed so as to extend obliquely rearward from the front end portion of the transmission 6. The transmission 6 is formed to project to the side surface 29 of the transmission 6. In the present embodiment, the air guide plate 22 is shown as being provided on one side of the transmission 6, but it may be provided on both sides of the lower part.

As shown in FIG. 4, the discharge port 23 is formed on the side wall 30 of the engine room 9 on the same side as the ventilation port 21 so as to be positioned relatively upward, and is a vertically long plate directed inward and forward. A louver 32 consisting of 31 is attached. That is, the ventilation port 21 is formed in the opposite direction to the louver 24 so that the outside air (W) taken into the vehicle body 1 can be smoothly discharged.

Further, as shown in FIG. 1, an opening 33 corresponding to the size (outer diameter) of the clutch housing 5 is formed in the partition wall 11 between the engine room 9 and the transmission 6 side. The outside air (W) that has passed around the transmission 6 enters the engine room 9 through the gap of the opening 33.

Next, the operation of this embodiment will be described.

As a large-sized bus or the like travels, traveling winds W ₁ and W ₂ are generated on the side and lower portions of the vehicle body 1. As shown in FIG. 1, the side traveling wind W ₁ is taken into the inside of the vehicle body 1 by the louver 24 of the ventilation port 21 and guided by the side baffle plate 25 to guide the transmission 6 and its surroundings. Cooling. Part of the outside air (W) after cooling passes through the vehicle body 1 to the opposite side as it is, but most of it enters the engine room 9 through the upper gap of the opening 33 of the partition wall 11 and the upper side of the engine 4. It flows out of the vehicle body 1 from the outlet 23 through the surroundings. Further, the lower traveling wind W ₂ is taken obliquely upward along the upper surface of the baffle plate 22 to cool the transmission 6, and then enters the engine room 9 through the side gap of the opening 33, It escapes to the outlet 23.

As described above, since the ventilation port 21 is provided on the side of the transmission 6 and the air guide plate 22 is provided on the lower side, and the exhaust port 23 is provided on the side wall 30 of the engine room 9, the traveling winds W ₁ , W ₂ are provided. Can be taken in effectively, the wind flow around the transmission 6 becomes active, and the cooling performance is improved. That is, it is possible to prevent the thermal deterioration due to the temperature rise of the devices and parts around the transmission 6, and also to reduce the temperature around the clutch housing 5 to help the life of the clutch. Therefore, the oil cooler conventionally provided for cooling is not required, and space saving and cost reduction are achieved. In addition, since the traveling winds W ₁ and W ₂ taken in pass through the engine room 9, they can also contribute to the cooling of the engine room 9.

Further, in this embodiment, since the louver 24 and the side air guide plate 25 are attached to the ventilation port 21, the traveling wind W ₁ can be reliably directed to the transmission 6. Further, since the louver 32 in the opposite direction is attached to the exhaust port 23, the side traveling wind W ₁ does not enter from the exhaust port 23, and the traveling wind (W) taken into the vehicle body 1 flows extremely smoothly.

The ventilation port, the baffle plate, and the discharge port may be provided at a plurality of positions, and the shape thereof including the louver and the side baffle plate is not limited to the illustrated example.

[0021]

[Effect of the device]

 In short, according to the present invention, the following excellent effects are exhibited.

Since the ventilation port is provided on the side of the transmission, the baffle plate is provided on the lower part, and the exhaust port is provided on the engine side, it is possible to effectively take in the traveling wind and cool the transmission and its surroundings. No need for oil cooler.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cooling device for a rear engine type vehicle according to the present invention.

FIG. 2 is a perspective view showing a ventilation port of FIG.

FIG. 3 is a side view showing the baffle plate of FIG.

FIG. 4 is a plan view showing an outlet of FIG.

FIG. 5 is a partially cutaway side view of a rear engine type vehicle for explaining conventional techniques and problems.

6 is an enlarged view of a main part of FIG.

FIG. 7 is a plan view of FIG.

[Explanation of symbols]

4 Engine 6 Transmission 21 Ventilation Port 22 Baffle Plate 23 Discharge Port W ₁ , W ₂ Traveling Wind

(72) Inventor Junichi Inokari, 3-25-1 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Isuzu Motors Limited Kawasaki Plant (72) Mitsuo Katsuma, 3-25-1 Tonomachi, Kawasaki-ku, Kanagawa Issue Isuzu Motors Limited Kawasaki Factory

Claims (1)

[Scope of utility model registration request] 1. A ventilation port for taking in traveling wind is provided at a side of a transmission arranged at a front portion of the engine, and a baffle plate for guiding the traveling wind upward is provided at a lower portion of the transmission, and the engine is also provided. A cooling device for a rear engine type vehicle, characterized in that an exhaust port for discharging the taken-in outside air is provided on the side.