JPH02208128A - Engine room ventilating structure of vehicle - Google Patents

Abstract

PURPOSE:To protect accessories from heat, in the engine room ventilation of a midship vehicle, by forming an outside air intake provided with a fan on the front of one side in the cross direction of an engine room to arrange accessories, and disposing an engine cooling water system heat capacity equipment on the rear of the other side. CONSTITUTION:An opening 15 for opening a side room 14L to the outside of a vehicle is formed on a rear fender 11L and an air intake duct 17 for engine and a resonator 18 are disposed in the side room 14L. A projecting wind guide groove 20 is formed to extend up to a door panel at a right rear fender 11R. A side room 14R is communicated with the outside at an air intake 20a and is made to communicate with an engine room 13 at an air intake 21 provided with a blowing fan 23 formed at a bulkhead 12. Moreover, an engine 24, engine accessories and engine cooling water equipment are disposed in the engine room 13. It is thus possible to protect engine accessories from thermal effect.

Description

[Detailed Description of the Invention] (Field of Application in Industry A) This invention relates to an engine room ventilation structure for a vehicle, particularly a mid-engine vehicle in which the engine is mounted horizontally between the front and rear axles. An outside air inlet is opened at the front position of one side of the side, and a fan for outside air intake is installed in the inlet, engine auxiliary equipment is installed on one side in the vehicle width direction in the engine room, and an engine auxiliary machine is installed in the engine room on the other side in the vehicle width direction. This invention relates to an engine room ventilation structure in which high heat capacity equipment for the engine cooling water system is placed at the rear of the side to reduce the effect of heat on engine auxiliary equipment.

(Prior art) In a vehicle, an engine room is defined by surrounding it with the outer panels of the car body, and inside the engine room, along with the engine, engine auxiliary equipment such as a generator (ACG) and an air conditioning compressor, as well as oil Engine cooling water system equipment such as a cooler and exhaust tank will be installed. The lower and front parts of the engine compartment are opened to guide the running air into the engine compartment, dissipating the heat generated by the engine, engine auxiliary equipment, and engine cooling water system equipment. For vehicles that require high dynamic performance, vehicles in which the engine is placed between the front and rear axles (mid-engine vehicles) are used to optimize load distribution between the front and rear wheels. In such a midship engine vehicle, as described in Japanese Utility Model Application Publication No. 62-141526, an engine room is defined at the rear of the passenger compartment, but since the front of the engine room is blocked off, the engine room is Hot air tends to get trapped inside, so in mid-engine cars like this,
As described in Japanese Patent No. 1528, an outside air inlet is formed in the outer side plate of the vehicle body and opens to the side of the engine room to ensure ventilation of the engine room.

(Problem to be Solved by the Invention) However, even in mid-engine cars where the outside air intake port on the side of the engine room is open to the outside of the car, compared to front engine cars etc. where the front part of the engine room is open. As a result, the ventilation of the engine room is poor, and heat tends to accumulate in the engine room, which may have a thermal effect that causes a decrease in durability of engine auxiliary equipment such as the fan belt for driving the ACG.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an engine room ventilation structure that can reduce thermal effects on engine auxiliary equipment.

(Means for Solving the Problems) The engine room ventilation structure for a vehicle according to the present invention defines an engine room behind the seat, and extends the crankshaft in the vehicle width direction in the engine room so that the engine is installed laterally. In a vehicle mounted on a vehicle, an outside air inlet opening to the outside of the vehicle is formed at the front of one side of the engine room in the vehicle width direction, and a fan is provided at the outside air inlet to take outside air into the engine room, and the The gist is that the engine auxiliary equipment is arranged on one side in the vehicle width direction in the engine room, and the high heat capacity equipment of the engine cooling water system is arranged in the rear part on the other side in the vehicle width direction in the engine room.

(Function) According to the engine room ventilation structure for a vehicle according to the present invention, the outside air taken in by the fan from the outside air inlet on one side in the vehicle width direction flows approximately diagonally in the engine room toward the other side in the vehicle width direction and toward the rear. Engine auxiliary equipment is located on the upstream side and high heat capacity equipment of the engine cooling water system is located on the downstream side with respect to the flow of outside air. Therefore, the installation position of the engine auxiliary equipment can be maintained in a low-temperature environment, and the engine auxiliary equipment can be prevented from being affected by heat.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

Figures 1 to 4 show the engine room ventilation structure of a vehicle according to an embodiment of the present invention. Figure 1 is a schematic plan view of the engine area of a midship engine vehicle, and Figure 2 is an enlarged view of the main parts. A plan view, FIG. 3 is a front view of the main part, and FIG. 4 is a side view of the main part.

In Figure 1, 11L is the left rear fender, IIR
is the right rear fender, and these fenders IIL,
Between the IIR, an engine room 13 is defined by being surrounded by the bulkhead 12 on the front, rear, left and right sides, and a side chamber 14L is formed between the bulkhead 12 and the rear fender IIL.
Side chamber 1 between bulkhead 12 and rear fender IIR
4R is defined. Left rear fender 111. is formed with an opening 15 that opens the side chamber 14L to the outside of the vehicle,
A looper 16 is attached to this opening 15. The side chamber 14R is opened to the outside of the vehicle through an opening 15 at the front and an opening (not shown) at the rear, and an intake duct 17 for intake of engine air and a resonator 18 for reducing intake noise are arranged inside. . The front end of the intake duct 1 opens near the above-described opening 15, and the rear end is connected to an air cleaner 28, which will be described later, to introduce outside air flowing in from the opening 15 into the air cleaner 19.

As shown in detail in FIGS. 2 to 4, on the right rear fender IIH, wind guide grooves 2'0 that protrude into the side chamber 14R are formed on the outer surface at the front and rear, and the rear end of this air guide groove 20 Concubine 1
An air guide port 20a opening to 4R is formed. The air guide groove 20 extends to the door panel and is continuous with a groove formed in the door panel. The front part of the side chamber 14R is the air guide port 20a.
It is opened to the outside of the vehicle, and is also opened to the engine room 13 via a ventilation port 21 formed in the front of the bulkhead 12. Note that 99 is a mudguard plate that protrudes into the side chamber 14R along the outer edge shape of the wheel house, and the mudguard plate 99 covers the lower side of the side chamber 14R. The bulkhead 12 has an upper edge fixedly attached to a side frame 22 and hangs down, and a blower fan 23 is attached to the above-mentioned ventilation opening 21. The blower fan 23 is assembled integrally with a motor and fixed to the side frame 22, and is driven by the motor to introduce air in the side chamber 14R into the engine room 13.

The front right part of the engine room 13 is open to the outside of the vehicle through the above-mentioned ventilation port 21, and the rear lower part is open to the vehicle body. Inside this engine room 13, a V-type 6-cylinder engine 24 is mounted horizontally with the crankshaft extending in the vehicle width direction, and is assembled integrally with the engine 24 on the left side of the engine 24. A transmission (not shown) is arranged. The engine 24 has an intake manifold 25 disposed between the V-shaped punctures, and the transmission includes a well-known torque converter and transmission mechanism. Further, in the engine room 13, a throttle body 26, a connecting tube 27, and an air cleaner 28 are arranged on the left side of the engine 24, and an ACG 29 and an air conditioning compressor are arranged on the right side of the engine 24, adjacent to the above-mentioned ventilation port 21. Engine auxiliary equipment such as 30 is installed. The air cleaner 28 is connected to the above-mentioned intake intake duct 1 through a tube passing through the bulkhead 12, and the connecting tube 2 is connected to the air cleaner 2.
8 and a throttle body 26, the throttle body 26 houses a throttle valve inside, and outside air is introduced into the intake manifold 25 from the intake duct 1 through the air cleaner 28, the connecting tube 2 and the throttle body 26. be done. Further, the ACG 29 and the compressor 30 are each connected to the crankshaft of the engine 24 via a belt or the like, and are driven integrally with the crankshaft of the engine. In addition, 31 is a water pump,
80 is an oil filter.

Furthermore, in the engine room 13, a cooling water expansion tank 32 is located behind the throttle body 26.
An oil cooler 33 for cooling the engine lubricating oil is disposed at the lower rear of the connecting tube 27, and a transmission heat exchanger 34 for cooling the transmission oil is disposed above the transmission. The tank 32, oil cooler 33, and transmission heat exchanger 34 are connected to a cooling water circuit, and the cooling water circulates as indicated by the small arrow in FIG. The expansion tank 32 is a closed water replenishment tank that replenishes the cooling water when it overflows, and returns the cooling water to the water circuit.The oil cooler 33 cools the lubricating oil of the engine 24 with cooling water, and cools the transmission The heat exchanger 34 cools the transmission oil with cooling water. In addition, 35
is an emission control box, and 36 is a distributor.

Next, the operation of this embodiment will be explained.

In the engine compartment ventilation structure of such vehicles,
The outside air is taken into the engine room 13 by the blower fan 23 through the side chamber 14R, and this outside air flows toward the engine room 13 and from the front right toward the rear diagonally to the left as shown by the large arrow in FIG. Ventilate the inside of the engine room 13. In the engine room 13, there is an ACG on the right side of the engine 24 near the opening of the ventilation port 21.
29, engine auxiliary equipment that is easily affected by heat, such as the compressor 30 and belt, are centrally arranged, and the engine 24
High heat capacity equipment for the engine cooling water system, such as an oil cooler 33, an expansion tank 32, and a transmission heat exchanger 34, are centrally installed at the rear left rear of the engine. Located downstream from the auxiliary equipment. For this reason, ACG29. compressor 30
It is also possible to reduce thermal effects on engine auxiliary equipment such as belts, prevent heat deterioration of engine auxiliary equipment, and improve durability.

(Effects of the Invention) As explained above, according to the engine room ventilation structure for a vehicle according to the present invention, the engine auxiliary equipment is placed in the engine room on the upstream side with respect to the flow of outside air that ventilates the engine room. Since the high heat capacity equipment of the cooling water system is placed on the downstream side, the thermal influence of the high heat capacity equipment of the engine cooling water system on the engine auxiliary equipment can be reduced, and thermal deterioration of these engine auxiliary equipment can be prevented.

[Brief explanation of the drawing]

1 to 4 show the engine room ventilation structure of a vehicle according to an embodiment of the present invention, FIG. 1 is a schematic plan view of the engine room of a midship engine vehicle, and FIG. 2 is an enlarged view of the main parts. A plan view, FIG. 3 is a front view of the main part, and FIG. 4 is a side view of the main part. 11R...Rear fender 12...Bulkhead 13...Engine room 14R-...Side compartment 21...Ventilator 23...Blower fan 4...Engine 9...ACG O...Compressor 2...・Expansion tank 3...Oil cooler 4...Transmission heat exchanger patent

Claims (1)

[Scope of Claims] In a vehicle in which an engine compartment is defined behind a seat, and an engine is mounted horizontally with a crankshaft extending in the vehicle width direction within the engine compartment, An outside air inlet opening to the outside of the vehicle is formed at the front of one side, and a fan is installed in the outside air inlet to take in outside air into the engine compartment.An engine auxiliary machine is installed on one side in the vehicle width direction in the engine compartment. An engine room ventilation structure for a vehicle, characterized in that a high heat capacity device for an engine cooling water system is arranged at the rear of the engine room on the other side in the vehicle width direction.