JPH0229236Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for an intercooler provided downstream of a compressor of a turbocharger in a turbocharged automobile engine.

Generally, in an engine equipped with a turbocharger, the intake air flowing through the intake system is pressurized by the compressor of the turbosupercharger, so as the intake pressure rises, the intake air temperature also rises, and its volume increases, increasing the required charging efficiency. There is an inconvenience that may lead to a decline in performance. To solve this problem, an intercooler is installed downstream of the compressor.
Technical means for cooling the pressurized intake air in this way are known from the prior art.

Incidentally, it is conventionally known that the intercooler is disposed directly under the bonnet cover in the engine room, as disclosed in, for example, Japanese Utility Model Application Publication No. 58-87933. Because it is not parallel to the cover, there is a problem that a relatively large dead space is formed between the two, and a special air guide plate is installed to prevent the running wind from passing directly above the intercooler through that large dead space. However, there is a problem in that the air guide plate and the bonnet cover collide with each other due to running vibrations, etc., causing noise.

The object of the present invention is to provide an intercooler mounting device for an automobile turbocharged engine, which has a simple structure and is free from the above-mentioned problems.

In order to achieve this objective, the present invention disposes an engine with a turbo supercharger in the engine room at the front of the automobile body, and provides an air-cooled intercooler downstream of the turbo compressor of the turbo supercharger.
In the system for cooling the pressurized intake air led from the turbo compressor to the engine, the intercooler is mounted on a stay frame at the upper part of the engine room so as to be substantially parallel to the bonnet cover covering the upper surface of the opening of the room. The front end of the air guide duct is supported through the intercooler, and the introduction port of the air guide duct provided at the upper part of the intercooler is opened toward the front of the engine room, and is faced to the air guide port formed on the front surface of the automobile body. The bonnet cover is characterized in that an elastic sealing member is interposed between the upper surface and the lower surface of the bonnet cover and is bonded to either surface.

An embodiment of the present invention will be described below with reference to the drawings.

First, referring to Fig. 1, to explain the outline of the supercharging system of a turbocharged engine equipped with an intercooler, there is an intake system In and an exhaust system Ex that are connected to the combustion chamber of engine E. A turbocharger St is provided. The turbocharger St consists of a turbo compressor C installed in the middle of the intake system In, and an exhaust system Ex.
It consists of an exhaust turbine T inserted in the middle of the
The compressor wheel 1 of the turbo compressor C and the turbine wheel 2 of the exhaust turbine T are connected through a rotating shaft 3. An intercooler Ic is provided in the intake system In on the downstream side of the compressor C. Exhaust gas flowing through the exhaust system Ex due to the operation of the engine E passes through the exhaust turbine T and is purified by the catalytic converter CA before being released to the outside air.
The rotation drives the compressor wheel 1 of the turbo compressor C via the rotating shaft 3.
Therefore, the intake air that flows into the intake system In from the air cleaner Ac is pressurized by the turbo compressor C, and then enters the intercooler IC, where the pressurized intake air is cooled and mixed with fuel in the fuel injection device FI, and the engine is inhaled into the combustion chamber of E.

Next, referring to FIGS. 2 to 5, the intercooler Ic
The specific mounting structure will be explained.

In the following description, "left, right" and "front, rear" refer to the forward direction of the vehicle.

In the engine compartment R formed at the front of the automobile body B, the engine E is placed horizontally on the left side (its crankshaft is perpendicular to the direction of travel of the automobile), and the intercooler Ic is arranged on the right side. will be established. This intercooler IC is air-cooled,
It is formed into a vertically flat shape and has a conventionally known internal structure. An inlet 4 and an outlet 5 are opened on both sides of the rear surface of the intercooler Ic, and the inlet 4 is connected to the turbo compressor C through an air hose 6.
It communicates with the intake system In on the downstream side, and the outlet 5 is connected via an air hose 7 to a fuel injection device FI provided at the base of the intake system In on the engine side.

A wind guide duct 8 is provided on the upper surface of the intercooler Ic via a rubber member 9 so as to straddle the cooler Ic. This air guide duct 8 extends forward from the upper surface of the intercooler Ic in a diverging shape, and an introduction port 10 is opened in the front surface thereof. Also, the wind guide duct 8
The discharge port 11 is open on the upper surface of the intercooler Ic. As shown by the arrow in FIG. 3, the cooling air that has flowed into the air guiding duct 8 flows downward through the gap within the intercooler Ic, thereby cooling the pressurized intake air flowing within the intercooler Ic.

Next, the support structure of the intercooler Ic will be explained. The upper frame 12a at the upper edge of the bulkhead 12 forming the front wall of the engine room R
A stay frame 15 is bridged between the support frame 14 provided on the top panel 13a of the dash board 13, which forms the rear wall of the engine room R, that is, the boundary wall with the passenger compartment. This stay frame 15 consists of two vertical stays 15a and a horizontal stay 15b connecting them, and the front end of the vertical stay 15a is connected to the upper frame 1 of the bulkhead 12.
2a with fixing bolts 16, and their rear ends are fixed with fixing bolts 16 to the support frame 14.
It is fixed with 7. An intercooler Ic is mounted on the stay frame 15, and front and rear brackets 18 and 19 of the intercooler Ic are elastically supported by the stay frame 15 with fixing bolts 21 via a cushioning material 20, respectively.

The upper surface of the upper frame 12a of the bulk head 12, which corresponds to the front of the intercooler Ic, is slightly depressed downward to form a guide slope 22, and a bonnet cover covers the guide slope 22 and the upper surface of the opening of the engine room R. A cooling air guide port 24 is formed with the lower surface of the cooling air guide 23 , and this air guide port 24 faces the introduction port 10 of the air guide duct 8 . Therefore, when the car is running, the wind that hits the front of the car body is guided by the air guide port 24 and easily enters the air guide port 24.

The top frame 12a of the bulkhead 12,
Elastic sealing materials 25 and 26 are adhered to the upper surfaces of the remaining left and right portions excluding the guide slope 22, and these elastic sealing materials 25 and 26
2a and the bonnet cover 23 are sealed so that the running wind hitting the front surface of the vehicle body B is easily guided to the air guide port 24 when the vehicle is running.

An elastic sealing material 27 bonded to either of them is interposed in the gap between the upper surface of the wind guide duct 8 and the lower surface of the bonnet cover 23 to prevent the running wind from flowing between them. There is.

The engine E has an intake manifold 28 of the intake system In and an exhaust system on the back side of the engine body Ea.
The intake manifold 28 is formed into a counterflow type in which the Ex intake manifold 29 is disposed.
The outlet side connecting end of the engine body Ea is connected to the intake port 30 opened on the back side of the engine body Ea, and the inlet side connecting end thereof is connected to the fuel injection device FI.
On the other hand, the inlet side connection end of the exhaust manifold 29 is connected to the exhaust port 3 opened at the back of the engine body Ea.
1, and its outlet side connection end is connected to the inlet of the exhaust turbine T of the turbocharger St.
The air cleaner Ac is disposed between the head cover 32 of the engine body Ea and the upper surface of the fuel injection device FI.

The turbo supercharger St is arranged behind the exhaust manifold 29. This turbo supercharger St
As described above, the engine includes a turbo compressor C and an exhaust turbine T, and the rotating shaft 3 connecting these is arranged substantially parallel to the crankshaft of the engine body Ea. The turbo compressor C has its inlet connected to the air cleaner Ac, and its discharge port connected to the intercooler Ic via the air hose 6.
connected to the entrance.

At the rear of the engine body Ea, on the side of the turbocharger St, an exhaust purifying catalytic converter CA is arranged close to the engine body Ea, and the inlet of the converter CA is connected to the outlet of the exhaust turbine T. Further, the outlet of the catalytic converter CA is communicated with the atmosphere via an exhaust muffler (not shown).

Next, the operation of the embodiment of the present invention will be explained.

The running wind generated when the car is running now flows into the wind guide duct 8 through the wind guide opening 24 formed by the guide slope 22 formed on the upper surface of the upper frame 12a of the bulkhead 12 and the bonnet cover 23, and then flows into the wind guide duct 8. The air flows downward through the gap in the intercooler Ic, while the cooling running air cools the heated pressurized intake air from the turbo compressor C flowing inside the intercooler Ic. The pressurized intake air after cooling flows into the fuel injection device FI, where it mixes with the injected fuel, and the mixture is guided into the combustion chamber of the engine body Ea through the intake manifold 28.

As described above, according to the present invention, an engine with a turbo supercharger is disposed in the engine room at the front of the automobile body, an air-cooled intercooler is provided downstream of the turbo compressor of the turbo supercharger, and the turbo In a device that cools pressurized intake air led from a compressor to an engine, the intercooler is installed in the upper part of the engine room via a stay frame so as to be substantially parallel to a bonnet cover that covers the upper surface of the opening of the room. Since the bonnet cover and the intercooler, which is approximately parallel to the bonnet cover, are supported as close as possible, the dead space directly under the bonnet can be effectively used as an installation space for the intercooler, and the intercooler can be installed in the engine room. There is no risk of major restrictions on the layout or maintenance of the engine body and other equipment inside.

In addition, the introduction port of the air guide duct provided at the top of the intercooler is opened toward the front of the engine room and faces the air guide port formed on the front of the vehicle body. Wind can be directly guided to the air guiding duct, and the heated pressurized air in the intercooler can be efficiently cooled by the guided cooling air.

Furthermore, an elastic sealing member bonded to either surface is interposed between the upper surface of the front end of the air guide duct and the lower surface of the bonnet cover, so that there is a gap between the upper surface of the air guide duct and the lower surface of the bonnet cover. The traveling wind that is about to pass through the gap can be efficiently guided to the air guide duct side by the elastic seal member, thereby further improving the cooling performance of the intercooler itself. Furthermore, even if the upper surface of the air guide duct is placed as close as possible to the lower surface of the bonnet cover in order to make the most effective use of the dead space, the elastic sealing member is interposed between both surfaces to avoid collision between the two surfaces. This makes it possible to prevent noise from occurring due to the collision. Moreover, the elastic seal member is
As mentioned above, since it is used both as a wind guide member that seals between the upper surface of the wind guide duct and the lower surface of the bonnet cover to guide the running wind to the wind guide duct, and as a buffer member between both sides, the structure is simple and costs are reduced. And it can contribute to improvement of assemblability.

Incidentally, if the present invention is configured as shown in the above embodiment, the following advantages can be obtained.

By elastically supporting the intercooler on the stay via a cushioning material, engine operating vibrations and vehicle running vibrations are less likely to be transmitted to the intercooler, thereby extending its lifespan.

When the engine is placed horizontally in the engine room, the intake and exhaust manifolds are installed at the rear of the engine body in order to operate the intake system from the passenger compartment side, but the turbocharger is placed at the rear of the engine body. As a result, the turbo supercharger is placed close to the exhaust manifold, thereby improving its turbo response.

By forming the air guide port between the upper surface of the upper frame of the bulkhead in the engine room and the front edge of the bonnet cover, it is no longer necessary to drill holes (air scoops) in the bonnet cover and other parts of the vehicle body, unlike conventional models. without damaging the appearance.

An air guide port is formed in a part between the upper surface of the upper frame of the back head and the lower surface of the front edge of the bonnet cover, and a sealing member is interposed in the remaining part between them, so that the air is concentrated in the air guide port. This allows the air flow to be guided to the wind guide duct, and the amount of air guided to the wind guide duct to be increased as much as possible.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the turbocharger system of the present invention.
Fig. 2 is a perspective view of the device of the present invention, Fig. 3 is a sectional view taken along the line of Fig. 2, Fig. 4 is a sectional view taken along the line of Fig. 2,
FIG. 5 is a front view of the air guide port. B...Car body, C...Turbo compressor, E...Engine, Ea...Engine body, Ic
...Intercooler, R...Engine room, St...
...Turbocharger, 8...Air guide duct, 10...Inlet, 12...Bulkhead, 12a...Upper frame, 13...Dash board, 14...Support frame, 15...Stay frame, 20... …
Cushioning material, 23... Bonnet cover, 24... Air guide port, 25... Elastic sealing material, 26... Elastic sealing material, 27... Elastic sealing material, 28... Intake manifold, 29... Intake manifold.

Claims (1)

[Scope of Claim for Utility Model Registration] An engine E with a turbo supercharger St is arranged in the engine room R at the front of the automobile body B, and an air-cooled intercooler Ic is provided downstream of the turbo compressor C of the turbo supercharger St. is provided to cool the pressurized intake air guided from the turbo compressor C to the engine E, and the intercooler Ic is placed in the upper part of the engine room R, and a bonnet cover 23 that covers the upper surface of the opening of the room R is provided. The air guide duct 8 is supported via the stay frame 15 so as to be substantially parallel to the intercooler Ic, and the inlet 10 of the air guide duct 8 provided above the intercooler Ic is connected to the engine room R.
It opens toward the front of the automobile body B.
An elastic seal member 27 is interposed between the upper surface of the front end of the air guide duct 8 and the lower surface of the bonnet cover 23, facing the air guide port 24 formed on the front surface, and bonded to either surface thereof. An intercooler mounting device for an automobile turbocharged engine, which is characterized by: In the intercooler mounting device for an automobile turbocharged engine as set forth in claim 1 of the utility model registration, the stay frame 15 is connected to an upper frame 12a of a bulkhead 12;
This is an intercooler mounting device for an automobile turbocharged engine, which bridges between support frames 14 provided on a dash board 13 forming the rear wall of the engine room R. In the intercooler mounting device for an automobile turbocharged engine as set forth in claim 1 of the utility model registration, the intercooler Ic is elastically supported on the stay frame 15 via a buffer material 20. Intercooler mounting device for supercharged engines. In the intercooler mounting device for an automobile turbocharged engine as set forth in claim 1 of the utility model registration claim, the engine E with the turbocharger St is a counterflow type engine placed horizontally in the engine room R. , an intercooler mounting device for an automobile turbocharged engine, in which intake and exhaust manifolds 28, 29 coupled thereto and the turbocharger St are arranged at the rear of the engine body Ea. In the intercooler mounting device for an automobile turbocharged engine as set forth in claim 1 of the registered utility model, the air guide port 24 is connected to a bulkhead 1 forming the front wall of the engine room R.
This intercooler mounting device for an automobile turbocharged engine is formed between the upper surface of the upper frame 12a of No. 2 and the lower surface of the front edge of the bonnet cover 23. In the intercooler mounting device for an automobile turbocharged engine as set forth in claim 1 of the registered utility model, the upper frame 12a of the bulkhead 12 forming the front wall of the engine room R and the upper frame 12a of the bonnet cover 23 The air guide port 24 is formed in a part between the lower surfaces of the leading edge, and elastic seal members 25 and 26 are interposed in the remaining part between them. Mounting device.