JP5097055B2 - Intake device for vehicle internal combustion engine - Google Patents

Description

  The present invention relates to an intake device for taking atmospheric air into an internal combustion engine mounted on a vehicle.

In Patent Document 1 as a prior art, an internal combustion engine is disposed in a front engine room of a vehicle, and an exhaust side long side surface of both long side surfaces extending in the direction of a crank axis of the internal combustion engine faces forward with respect to a traveling direction. While mounting with the longitudinal side facing backward, the air intake at the tip of the intake duct to the air cleaner in this internal combustion engine is placed on one of the side surfaces perpendicular to the crank axis in the internal combustion engine, It has been proposed that the opening is directed forward with respect to the traveling direction.
JP-A-8-326567

  According to the configuration of this prior art, the exhaust side long side surface in the internal combustion engine is forward-facing, so that exhaust system parts such as an exhaust manifold attached to the exhaust side long side surface can be actively cooled by the traveling wind of the vehicle. In addition, since the air intake port in the air intake duct to the air cleaner is forward-facing, a part of the driving wind in the vehicle directly jumps into the air intake port. Can be actively taken into the mouth.

  However, on the other hand, the traveling wind of the vehicle is warmed by hitting the forward-facing exhaust side long side surface in the internal combustion engine, and a part of the warmed air is taken in from the forward air intake port in the intake duct. Since it is mixed with air, there is a problem in that the filling efficiency of the internal combustion engine is reduced and the fouling of the filter element is increased.

  The present invention pays attention to the fact that the upper surface of an internal combustion engine mounted on a vehicle is provided with an engine cover that covers the engine. This engine cover is used to solve the above-described problems and more positively drive wind. Technical introduction is to make a practical introduction.

In order to achieve this technical problem, claim 1
“In the engine room at the front of the vehicle, the internal combustion engine is mounted with the exhaust-side long side face to which the exhaust system part is attached facing forward, and the left and right long side faces extending in the direction of the crank axis of the internal combustion engine. In an air intake apparatus having a configuration in which an air intake port at a tip of an air intake duct to an air cleaner in the internal combustion engine is disposed so as to open forward in a portion of one of right and left side surfaces perpendicular to a crank axis. ,
An engine cover is attached to the upper surface of the internal combustion engine so as to cover the upper side of the air intake port of the intake duct with the engine cover. A front hanging plate is provided so as to cover a portion above the exhaust system component, and a portion between the air intake port and the exhaust system component attached to the exhaust side longitudinal side of the front hanging plate is The air guide portion is inclined obliquely rearward and outward toward the air intake port in plan view. "
It is characterized by that.

Claim 2
“In the first aspect of the present invention, the back surface of the air guide portion is provided with a shielding plate configured to extend rearward along one side surface of the internal combustion engine.”
It is characterized by that.

  According to the first aspect of the present invention, the traveling wind in the vehicle is blown to the exhaust side long side surface of the internal combustion engine and is also blown to the front surface of the front sag plate provided on the engine cover. It will jump directly into the air intake opening.

  Of these, the traveling wind blown to the exhaust side longitudinal side surface flows backward after cooling the exhaust system parts attached to the exhaust side longitudinal side surface, but the traveling wind blows to the front of the front cover plate of the engine cover. A part of the wind flows in the lateral direction (in the direction of the crank axis) without being heated by the internal combustion engine, and a part of the traveling wind that flows in the lateral direction is generated by an air guide provided on the front hanging plate. It will be induced to enter the air intake in the intake duct.

  In addition, the traveling wind blown by the air guide portion of the front hanging plate is guided to enter the air intake at the air guide portion.

  In addition, the air guide portion formed on the front hanging plate functions to prevent air warmed in the engine cover from entering the air intake port.

  As a result, fresh air that is not warmed by the internal combustion engine can be taken in more positively, so that it is possible to reliably improve the filling efficiency and reduce the fouling of the filter element.

  According to claim 2, since the inflow of the air warmed in the engine cover to the air intake port can be more reliably prevented by the shielding plate, the above-mentioned effect can be promoted. With the configuration extending rearward along the side surface, the air intake port can be brought closer to one side surface of the internal combustion engine, so that the engine cover can be reduced in size and weight by this amount.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show a first embodiment.

  In this figure, reference numeral 1 denotes a vehicle body frame in a vehicle, and an engine room 2 is formed at the front of the vehicle body frame 1, and the engine room 2 has an internal combustion engine configured in a multi-cylinder series. 3 and a water cooling radiator 4 for the internal combustion engine 3 are arranged so that the radiator 4 is located in front of the internal combustion engine 3 in a plan view (FIG. 1).

  In the engine room 2, the internal combustion engine 3 has a crank axis 5 that is substantially perpendicular to the traveling direction of the vehicle in a plan view (FIG. 1) and is horizontally oriented. The left and right longitudinal side surfaces 6 and 7 extending in the direction are mounted such that one longitudinal side surface 6 faces backward and the other longitudinal side surface 7 faces upward.

An intake manifold 8 is attached to a longitudinally facing side surface (intake side longitudinal side surface) 6 of the left and right longitudinal side surfaces 6 and 7 of the internal combustion engine 3, while the left and right longitudinal side surfaces 6 and 7 are attached.
Among them, exhaust system parts such as an exhaust manifold 9 are attached to a forward-facing longitudinal side surface (exhaust side longitudinal side surface) 7.

  An air cleaner 10 is attached to the upper surface of the intake manifold 8, and an air intake duct 11 having an air intake 12 at the tip is connected to the air cleaner 10.

  The air intake 12 at the front end of the intake duct 11 is substantially the same as the upper surface of the internal combustion engine 3 in the side surface 13 of the left and right side surfaces 13 and 14 of the internal combustion engine 3 in a plan view as shown in the figure. It is located at the same height and at an appropriate rearward position from the exhaust-side longitudinal side surface 7 by an appropriate size, and opens forward (forward or obliquely forward) with respect to the traveling direction of the vehicle.

  A transmission mechanism 15 is attached to the other side surface (output side surface) 14 of the left and right side surfaces 13 and 14 perpendicular to the crank axis 5 in the internal combustion engine 3.

  An oil filler 16 for refueling the internal combustion engine 3 is provided at a corner portion of the upper surface of the internal combustion engine 3 where the exhaust side long side surface 7 and the one side surface 13 intersect.

  An engine cover 17 is attached to the upper surface of the internal combustion engine 3 so as to cover it, and one end portion 18 of the engine cover 17 extends outward beyond one side surface 13 of the internal combustion engine 3. The one end portion 18 is configured to cover the upper portion of the air intake port 12 at the tip of the intake duct 11.

  A front hanging plate 19 that protrudes downward is integrally provided at a portion of the lower surface of the engine cover 17 on the front side with respect to the traveling direction of the vehicle.

  The front hanging plate 19 is configured to extend along the exhaust side long side surface 7 of the internal combustion engine 3 in a plan view as shown in the figure.

  That is, the front hanging plate 19 is configured to cover a portion of the exhaust side long side surface 7 of the internal combustion engine 3 above the exhaust system parts such as the exhaust manifold 9.

  A portion of the front sag plate 19 between the air intake 12 and the exhaust manifold 9 attached to the exhaust side long side surface 7 is appropriately directed toward the air intake 12 in a plan view shown in FIG. The air guide portion 20 is inclined obliquely rearward and outward by an angle θ.

  The oil filler 16 for the internal combustion engine 3 is provided in a recess 21 provided in the engine cover 17.

  In this configuration, traveling wind A (see FIG. 1) generated when the vehicle travels forward strikes the exhaust side longitudinal side surface 7 of the internal combustion engine 3 and also strikes the front surface of the front drooping plate 19 provided on the engine cover 17. On the other hand, a part of the traveling wind directly jumps into the air intake 12 that opens forward (forward or obliquely forward).

  Of these, the traveling air blown against the exhaust side long side surface 7 flows backward after cooling exhaust system components such as the exhaust manifold 9 attached to the exhaust side long side surface 7. A portion of the traveling wind blown to the front surface of the plate 19 flows in the lateral direction (in the direction of the crank axis) without being warmed by the internal combustion engine 3, and a part of the traveling wind flowing in the lateral direction The air guide 20 provided on the front hanging plate 19 is guided to enter the air intake 12 in the intake duct 11.

  In addition, the traveling wind blown by the air guide portion 20 of the front hanging plate 19 is guided by the air guide portion 20 so as to enter the air intake 12 as indicated by an arrow B. Become.

  Moreover, the air guide portion 20 formed on the front hanging plate 19 acts to prevent the air warmed in the engine cover 17 from entering the air intake 12.

  As a result, as fresh air as possible that is not warmed by the internal combustion engine 3 can be taken in more positively.

  Next, FIGS. 4 and 5 show a second embodiment.

  In the second embodiment, a shielding plate 22 configured to extend rearward along one side surface 13 of the internal combustion engine 3 is integrally formed on the back surface of the air guide portion 20 in the first embodiment. The other configuration is the same as that of the first embodiment. The shielding plate 22 is integrally connected to the ceiling surface of the engine cover 17.

  According to the second embodiment, the provision of the shielding plate 22 can more reliably prevent the air warmed in the engine cover 17 from flowing into the air intake 12.

  Moreover, the shielding plate 22 extends rearward along one side surface 13 of the internal combustion engine 3, so that the air intake 12 is provided on the one side surface 13 of the internal combustion engine 3 in the first embodiment. Therefore, the projecting dimension from the one side surface 13 at the one end 18 of the engine cover 17 is reduced by this amount from the projecting dimension L1 to L2 in the first embodiment. As a result, the engine cover 17 can be reduced in size and weight.

It is a top view when mounted in an internal combustion engine. FIG. 2 is an enlarged side view taken along the line II-II in FIG. 1 showing the first embodiment. FIG. 3 is an enlarged plan sectional view taken along line III-III in FIG. 2. It is a side view which shows 2nd Embodiment. FIG. 5 is an enlarged plan sectional view taken along line VV in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle body frame 2 Engine room 3 Internal combustion engine 5 Crank axis 6 Intake side long side surface in the internal combustion engine 7 Exhaust side long side surface in the internal combustion engine 8 Intake manifold 9 Exhaust manifold 10 Air cleaner 11 Intake duct 12 Air intake port 13 One in the internal combustion engine Side face 14 The other side face in the internal combustion engine 16 Oil filler 17 Engine cover 19 Front hanging plate 20 Air guide portion 22 Shielding plate

Claims (2)

An internal combustion engine is mounted in an engine room at the front of the vehicle with the exhaust-side long side face to which the exhaust system part is attached facing forward of the left and right long side faces extending in the direction of the crank axis of the internal combustion engine. An air intake apparatus having a configuration in which an air intake port at a front end of an air intake duct to an air cleaner in the internal combustion engine is disposed to open forward in a portion of one of the left and right side surfaces perpendicular to the axis.
An engine cover is attached to the upper surface of the internal combustion engine so as to cover the upper side of the air intake port of the intake duct with the engine cover. A front hanging plate is provided so as to cover a portion above the exhaust system component, and a portion between the air intake port and the exhaust system component attached to the exhaust side longitudinal side of the front hanging plate is An air intake device for an internal combustion engine for a vehicle, characterized in that the air guide portion is inclined obliquely rearward and outward toward the air intake port in plan view.   2. The vehicle internal combustion engine according to claim 1, wherein a shielding plate configured to extend rearward along one side surface of the internal combustion engine is provided on a back surface of the air guide portion. Intake device.

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