JPH0515569Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for introducing atmospheric air into the air cleaner of an internal combustion engine installed in a motor vehicle.

[Prior art]

Atmospheric air to the internal combustion engine must be introduced at as low a temperature as possible and with as little dust and water droplets as possible. Therefore, conventionally, for example, Utility Model Application No. 53-143911 or Utility Model Application No. 61
- As described in Publication No. 74663, etc., the tip of the atmospheric air intake pipe to the air cleaner should be opened at a location close to body members such as the fender apron member or radiator support member that constitute the engine room. It consists of

[Problem that the invention attempts to solve]

However, this conventional air intake device does not separate the opening at the tip of the atmospheric air intake pipe from the inside of the engine room, so hot air warmed by the internal combustion engine in the engine room cannot be used. At the same time, they also inhaled the dust and water droplets that were drawn into the engine compartment when the car was running.

In this case, in order to prevent hot air warmed in the engine room, dust and water droplets drawn into the engine room from being inhaled, use another member to close the opening at the tip of the atmospheric air intake pipe. However, in addition to the need for materials for this isolation, the labor required to install and remove the atmospheric air intake pipe increases, which only increases manufacturing costs. Otherwise, maintainability is hindered.

The present invention focuses on the fact that in recent internal combustion engines, output characteristics are improved by making the length of the intake pipe from the air cleaner to the intake manifold relatively long. The above problem is solved by isolating the opening of the atmospheric air intake pipe to the air cleaner from the engine room by utilizing the intake pipe line from the air cleaner to the intake manifold.

[Means for solving problems]

In order to achieve this purpose, the tip of the atmospheric air intake pipe to the air cleaner of the internal combustion engine installed in the engine room of a car is opened at a position close to the body parts that make up the engine room. In an air intake device for an engine, an intake pipe line extending from the air cleaner to an intake manifold in an internal combustion engine,
A portion close to the body member is curved in a U-turn shape, and an opening at the tip of the atmospheric air intake pipe is located at a portion between this U-turn curved portion and the body member.

[Effect]

With this configuration, a U-turn-shaped curved portion provided in the middle of the intake pipe line from the air cleaner to the intake manifold is located between the opening of the atmospheric air intake pipe to the air cleaner and the inside of the engine room. In other words, since the opening of the atmospheric air intake pipe to the air cleaner is isolated from the inside of the engine room by the U-turn shaped curved part of the intake pipe, the atmospheric air to the air cleaner is It is possible to reliably reduce the intake of hot air, dust, and water droplets in the engine room into the air intake pipe.In this case, since no other parts are used, there is no increase in cost, and the atmospheric air intake is reduced. This does not interfere with maintenance of the immigration bureau.

On the other hand, by curving the intake pipe from the air cleaner to the intake manifold in a U-turn shape at a portion close to the body members that make up the engine room, the length of the intake pipe can be reduced to It is possible to make the room sufficiently long while minimizing the reduction in the internal volume of the room, and the length of the intake pipe can be adjusted to be increased or decreased by the U-turn shaped curved portion.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 indicates a body member for forming an engine compartment in the front part of the automobile;
An internal combustion engine 3 having an intake manifold 4 on one side and an exhaust manifold 5 on the other side is mounted in the engine room 2, and a radiator 6 is disposed at the front of the internal combustion engine 3.

Reference numeral 7 indicates an air cleaner disposed on the side in the engine room 2, and the clean side chamber of the air cleaner 7 and the intake manifold 4 are connected by a long intake pipe 8, and An atmospheric air intake pipe 9 to the air cleaner 7 is connected to the air cleaner 7 .

Then, the midway of the intake pipe line 8 from the air cleaner 7 to the intake manifold 4 is arranged in a U-turn shape at a portion of the frame chassis 1 constituting the engine room 2 that is close to the radiator support member 1a or the fender apron member 1b. curved to 8
a, and an opening 9a at the tip of the atmospheric air intake pipe 9 to the air cleaner 7 is located between this U-turn shaped curved portion 8a and the radiator support member 1a or the fender apron member 1b. Configure.

With this configuration, the length of the intake pipe 8 from the air cleaner 7 to the intake manifold 4 is increased by the U-turn-shaped curved portion 8a provided in a portion close to the body member 1 that constitutes the engine room 2. On the other hand, since this U-turn-shaped curved portion 8a is located between the opening 9a of the atmospheric air intake pipe 9 to the air cleaner 7 and the inside of the engine room 2, the atmospheric air intake pipe to the air cleaner 7 can be 9, suction of hot air, dust, and water droplets in the engine room 2 can be reliably reduced by the U-turn shaped curved portion 8a.

Further, the length of the intake pipe 8 can be increased or decreased by a U-turn shaped curved portion 8a provided in the middle of the intake pipe 8.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view, and FIG. 2 is a cross-sectional view taken from FIG. 1. 1...Body member, 1a...Radiator support member, 1b...Fender apron member, 2...
...Engine room, 3...Internal combustion engine, 4...Intake manifold, 5...Exhaust manifold, 6...
Radiator, 7...Air cleaner, 8...Intake pipe line, 8a...U-turn shaped curved portion, 9...Atmospheric air intake pipe, 9a...Opening of the atmospheric air intake pipe.

Claims (1)

[Scope of utility model registration request] An air intake device for an internal combustion engine for an automobile, in which the tip of an atmospheric air intake pipe to an air cleaner in an internal combustion engine mounted in an engine room of an automobile is opened at a position close to a body member constituting the engine room, The intake pipe line from the air cleaner to the intake manifold of the internal combustion engine is curved in a U-turn shape at a portion close to the body member, and the air flows between the U-turn curved portion and the body member. An air intake device for an internal combustion engine for an automobile, characterized in that an opening is located at the tip of an air intake pipe.