JPH05155257A - Engine room exhaust system - Google Patents

Abstract

(57) [Summary] [Purpose] Efficiently discharges high-temperature air in the engine room of the vehicle to suppress high temperature in the engine room. [Structure] An opening 11 is provided in a rear cover 5 of an engine room 6 below a cab 2, and the radiating fan 1 is in contact with the opening 11
3 is attached, and the high temperature air in the engine room 6 sucked by the radiant fan 13 is passed through the gap 1 between the rear cover 5 and the cargo bed 15.
Discharge in a substantially radial direction toward the inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for discharging hot air from an engine room such as a truck.

[0002]

2. Description of the Related Art As an engine enclosure is being strengthened in recent years as one of the measures against truck noise, the temperature inside the engine room becomes high, and various harnesses, rubber hoses, and other parts mounted in the engine room Durability may be insufficient. In this case, it is preferable to suppress the temperature rise in the engine room by positively discharging the hot air in the engine room to the outside, so there are some cases where an axial electric fan is attached to the rear cover of the engine room. Since the cargo bed is usually located close to the rear of the rear cover, the exhaust resistance of the electric fan becomes extremely large, the amount of air that can be discharged from the engine room decreases, and the temperature drop effect in the engine room becomes insufficient. there were.

[0003]

SUMMARY OF THE INVENTION According to the present invention, high temperature air can be efficiently discharged from the engine room.
This is to surely suppress the temperature rise in the engine room.

[0004]

In order to solve this problem, in an engine room exhaust system according to the present invention, an axis of rotation is set so that an opening and an intake port formed in the rear of the engine room face the opening. It has a radiant fan which is mounted horizontally and whose discharge port opens almost in the radial direction toward the gap between the engine room and the rear cargo bed.

Further, in the engine room exhaust system according to the present invention, the rotary shaft is mounted substantially horizontally so that the opening and the intake port formed in the rear of the engine room face the above-mentioned opening, and the exhaust port is connected to the engine room. It has a radiant fan that opens in a substantially radial direction toward the gap with the rear cargo bed and a temperature sensor that detects the temperature inside the engine room, and the radiant fan of the radiant fan increases as the temperature inside the engine room increases. It is configured to increase the rotation speed.

[0006]

Therefore, when the radiant fan draws in the hot air in the engine room from the opening formed in the rear of the engine room and discharges it in a substantially radial direction toward the gap between the engine room and the cargo bed, Since the discharge effect is not particularly hindered by the platform close to the
The radiant fan can sufficiently exhibit its original blowing performance, and therefore, the hot air can be efficiently and smoothly discharged from the engine room.

Further, since the rotational speed of the radiant fan is increased in accordance with the rise in the temperature inside the engine room, a required amount of high temperature air is discharged from the inside of the engine room to exhaust more than necessary. Since the temperature does not exist in the engine room, the temperature in the engine room can be efficiently suppressed at all times, and the cost can be reduced by reducing the capacity of the radiant flow fan.

[0008]

Embodiments of the present invention shown in the drawings will be specifically described below. At the bottom of cab 2 of truck 1,
An engine 7 is supported by side rails 8 in an engine room 6 surrounded by a cab floor 3 on the upper surface, an engine under cover 4 on the lower surface, and a rear cover 5 on the rear surface, and a transmission 9 is formed on the rear surface of the engine 7 protruding rearward from the rear cover 5. Is attached, and a radiator 10 is mounted on the front surface of the engine 7.

An opening 11 is provided in the rear cover 5 in the upper part of the engine room 6, and an electric radiating fan 13 is attached to a supporting portion 12 fixed so as to straddle the opening 11 from the rear such that the rotating shaft is horizontal. The suction port 14 of the radiant fan 13 faces the opening 11, and the air in the engine room 6 is sucked into the suction port 14 from the opening 11 by the driving of the radiant fan 13, as shown by arrow A in FIG. The gas is discharged into the gap 16 from a discharge port 17 that opens in the radial direction toward the inside of the gap 16 between the rear cover 5 and the luggage carrier 15. A temperature sensor 18 that measures the internal air temperature is installed above the engine room 6.

The ambient temperature in the engine room 6 rises according to the operating condition of the engine 7 and the temperature at which the components installed in the engine room 6 may start to be damaged by heat, for example, above 100 ° C. When it reaches, the temperature sensor 18 senses this and sends a signal to a control box (not shown), and the radiating fan 13 is driven by the control of the control box, and as shown in FIG. The number of rotations of the radiating fan 13 increases linearly as a solid line, stepwise, or in a curved line as a one-dot chain line in accordance with the rise of the engine. Gap 16 with cargo bed 15
When the inside of the engine room 6 has a high temperature of, for example, about 130 ° C. or higher, the maximum air flow rate of the radiant fan 13 is maintained.

In this case, the radiating fan 13 has the rear cover 5
Since the air is discharged in a substantially radial direction toward the gap 16 between the cargo bed 15 and the cargo bed 15, the air blowing performance is not impaired by the presence of the cargo bed 15, and the required air discharge function can always be efficiently exerted. It is possible to easily avoid that the high temperature air in the engine room 6 is positively discharged to the outside depending on the increase in the temperature inside the engine room 6, and the interior parts of the engine room room 6 are exposed to high temperatures and deteriorate. , Good vehicle maintenance can be achieved. Needless to say, the radial fan in the present invention also includes an oblique axial fan that discharges air toward the gap between the rear cover of the engine room and the luggage carrier.

[0012]

In the engine room exhaust system according to the present invention, the radiant fan does not exert a great resistance to the air exhaust in the engine room by the radiant fan, so that the radiant fan sufficiently exhibits its original blowing performance. In addition to increasing the temperature in the engine room, the amount of air blown by the radiant fan increases, and the required amount of high-temperature air is smoothly discharged from the engine room, increasing the temperature in the engine room. It can always be efficiently suppressed.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view in an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an explanatory view of the operation of the above embodiment.

[Explanation of symbols]

 1 Truck 2 Cab 5 Rear Cover 6 Engine Room 7 Engine 11 Opening 12 Support 13 Radiant Fan 14 Suction Port 15 Loading Platform 16 Gap 17 Discharge Port 18 Temperature Sensor

Claims (2)

[Claims] 1. An opening and a suction port formed in the rear of an engine room are mounted so that a rotary shaft thereof is substantially horizontal so that the discharge port faces a clearance between the engine room and a cargo bed behind the engine room. An engine room exhaust system having a radial fan that opens in a substantially radial direction. 2. An opening and a suction port formed in the rear of the engine room are attached substantially horizontally so that the suction port faces the opening, and the discharge port is directed toward a gap between the engine room and a cargo bed behind the engine room. A radiant fan that opens in a substantially radial direction and a temperature sensor that detects the temperature inside the engine room are provided, and the rotational speed of the radiant fan increases as the temperature inside the engine room increases. Engine room exhaust system.