JP2616147B2 - Rocker cover device for internal combustion engine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rocker cover device for an internal combustion engine including an intercooler disposed above a rocker cover.

<Conventional technology> Conventionally, in an internal combustion engine with a supercharger, the temperature of the high-temperature intake air pressurized by an intake compressor of the supercharger is reduced by an intercooler, and the air density is increased to enhance the supercharging effect. 2. Description of the Related Art The efficiency of charging intake air supplied to an engine body has been increased to improve output.

In some automobiles employing an air-cooled type as an intercooler, an outside air inlet is opened in an engine hood substantially above the intercooler, and air introduced from the outside air inlet is passed through a core portion of the intercooler. To cool the intercooler.

By the way, there has been known an air-cooled intercooler as described above, which is disposed above a rocker cover (see Japanese Utility Model Laid-Open No. 63-58029).

<Problems to be Solved by the Invention> In such an arrangement in which the intercooler is disposed above the rocker cover, rainwater or the like that has passed through the core portion of the intercooler together with the outside air is, for example, the front end upper surface or the rear end of the rocker cover. It falls to the upper surface, and the front end flows downward from the upper corner portion of the rear end.

In particular, when the engine is mounted on the exhaust system component mounting side at an angle, rainwater or the like flowing from the end of the rocker cover is connected to the end of the cylinder head located below the end of the rocker cover. It descends to the exhaust manifold as an exhaust system part.

When rainwater or the like falls on the high-temperature exhaust manifold in this way, the rainwater or the like evaporates and becomes water vapor, which affects electrical components in the engine room, and
There is a problem that the steam is long adhered to the exhaust manifold, and the degree of progress of rust generated in the exhaust manifold is accelerated.

Therefore, the present invention has been made in view of the above conventional problems,
It is an object of the present invention to prevent rainwater or the like that has passed through a core portion of an intercooler from falling on exhaust system components, thereby solving the above-mentioned conventional problems.

<Means for Solving the Problems> For this reason, in the present invention, in an internal combustion engine in which an intercooler is arranged above a rocker cover and the intercooler is cooled by outside air, the intercooler is located on the exhaust system component arrangement side. A gutter for receiving and draining water that has passed through the intercooler is provided at the upper corner of the end of the rocker cover.

<Operation> In such a configuration, rainwater or the like that has passed through the core portion of the intercooler together with the outside air falls, for example, on the upper surface of the front end portion or the upper surface of the rear end portion of the rocker cover, and falls downward from the upper corner portion of the front end portion or the rear end portion. Flows.

In particular, rainwater or the like flowing downward from the upper corner portion of the end of the rocker cover located on the exhaust system component placement side falls into the gutter portion and is received, flows along the gutter portion, flows and travels to the exhaust system component. Drained so as not to get off.

By receiving rainwater or the like at the gutter and draining it, the high-temperature exhaust system components do not fall down, so that the water vapor affects the electrical components in the engine room, or the rainwater or water vapor adheres. As a result, it is possible to suppress the occurrence of the problem that the degree of progress of rust generated in the exhaust system parts is accelerated.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2, an engine 2 is disposed horizontally in an engine room 1 of an automobile. Rocker cover 4 on top of cylinder head 3 of engine body 2A
Is attached.

Above the rocker cover 4, a box-shaped intercooler 5 having a substantially rectangular shape is disposed. The front side of the intercooler 5 is located immediately above the left side portion of the vehicle on the rocker cover 4. An intercooler cover 6 is mounted on the upper part of the intercooler 5, and an upper surface of the core 5 a of the intercooler 5 is exposed from an opening 7 provided in the cover 6.

An inlet tube 8 into which intake air is introduced from an intake compressor of a supercharger (not shown) is connected to a front portion of the intercooler 5. Further, an intake collector 9 is connected to a rear portion of the intercooler 5, and the intake collector 9 is connected to an intake manifold 10.

This intake manifold 10 has a throttle chamber
It is connected to the cylinder head 3 via 11.

An exhaust manifold as an exhaust system component is provided at a position located on the left side of the vehicle in front of the cylinder head 3.
16 are linked.

On the other hand, the intercooler 5 of the hood 12
An air intake bulge 13 for introducing outside air for cooling to the intercooler 5 is formed in an opening 12a formed in a portion corresponding to the upper portion. Also, the hood
A rubber seal 14 is mounted around the opening 12a on the lower surface of the hood 12 to seal the opening 12a and the inside of the engine room 1 by pressing against the outer periphery of the intercooler cover 6 when the hood 12 is closed. .

Here, a gutter for receiving and draining rainwater or the like that has passed through the core portion 5a of the intercooler 5 is provided at an upper corner portion at the front end of the rocker cover 4 that is located on the left side of the vehicle and located on the exhaust manifold 16 arrangement side. A part 15 is provided (see FIGS. 3 and 4).

This gutter part 15 is formed integrally with the rocker cover 4,
A substantially triangular portion is provided with a substantially U-shaped groove 15a opened to the upper surface.

As is apparent from FIGS. 3 and 4, the depth of the groove 15a is changed so that the inner bottom surface thereof is inclined from a high position to a low position from a portion located on the right side of the vehicle to a portion located on the left side. ing.

That is, the depth of the groove 15a gradually increases from a portion located on the right side of the vehicle to a portion located on the left side.

As a result of providing the gutter portion 15 having such a configuration, the following operation
It works.

That is, rainwater and the like that have passed through the core portion 5a of the intercooler 5 together with the outside air fall on, for example, the upper surface of the front end and the upper surface of the rear end of the rocker cover 4, and flow downward from the upper corner portions of the front and rear ends.

In particular, rainwater or the like flowing downward from the upper corner portion of the front end of the rocker cover 4 falls into the groove 15a of the gutter portion 15 and is received therefrom, from a portion located on the right side of the vehicle according to the inclination of the groove 15a. It flows down to the part located on the left side,
It falls from the lower end of the groove located on the left side of the rocker cover 4 so as not to fall on the exhaust manifold 16.

In this way, rainwater or the like is received by the gutter portion 15 and drained, so that the rainwater or the like does not fall on the high-temperature exhaust manifold 16, and the generation of steam affects electric components in the engine room, or the rainwater or the steam. It is possible to suppress the occurrence of the problem that the progress of rust generated in the exhaust manifold 16 due to the adhesion is accelerated.

The dotted arrows in FIG. 1 indicate the flow of outside air for cooling of the intercooler 5.

The configuration of the above embodiment does not show a structural limitation of the present invention. In short, the present invention relates to an exhaust system for an internal combustion engine in which an intercooler is provided above a rocker cover and the intercooler is cooled by outside air. A gutter for receiving and draining water that has passed through the intercooler may be provided at the upper corner portion of the end of the rocker cover located on the component disposition side.

For example, in the present embodiment, the gutter portion is formed integrally with the rocker cover, but may be provided as a separate member.

In this embodiment, the relationship between the rocker cover 4, the intercooler 5, and the gutter in the horizontal engine 2 has been described. However, the present invention can be similarly applied to a vertical engine.

<Effects of the Invention> As described above, according to the present invention, in an internal combustion engine provided with an intercooler cooled by outside air disposed above a rocker cover, the end of the rocker cover located on the exhaust system component side. A gutter for receiving and draining rainwater and the like that has passed through the intercooler is provided in the upper corner portion of the section, so that rainwater and the like can be prevented from falling on high-temperature exhaust system components, and This eliminates the effect on the electrical components in the engine room, suppresses the progress of rust generated in the exhaust system components, and increases the usefulness of the service life of the exhaust system components.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a front portion of an automobile showing an embodiment of a rocker cover device for an internal combustion engine according to the present invention, FIG. 2 is a perspective view of the embodiment, and FIG. Plan view, fourth
3 (a), 3 (b), 3 (c) and 3 (d) respectively show A in FIG.
FIG. 3 is a cross-sectional view taken along a line A, a line BB, a line CC, and a line DD. 2 ... Engine, 3 ... Cylinder head, 4 ... Rocker cover, 5 ... Intercooler, 5a ... Core part, 15 ...
… Gutter part, 16 …… Exhaust manifold

Claims (1)

(57) [Claims] In an internal combustion engine having an intercooler arranged above a rocker cover and cooling the intercooler with outside air, an intercooler is provided at an upper corner portion of an end of the rocker cover located on a side where exhaust system components are arranged. A rocker cover device for an internal combustion engine, comprising a gutter for receiving and draining water that has passed through.