JP2010280233A - Intake device for engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intake device for an engine solving the problem of lowering of engine performance due to clogging of an air cleaner by surely preventing the suction of foreign matter from an opening of an intake duct. <P>SOLUTION: This intake device for the engine 2 includes the air cleaner 5 mounted in the engine 2, the intake duct 6 for introducing air into the air cleaner 5 and an air outlet pipe 7 to take out air purified by the air cleaner 5. The intake device is constituted by arranging the intake duct 6 on an upper side of the engine 2, extending the intake duct 6 in a vehicle width direction from the air cleaner 5 and forming the opening 6a to take air in a vehicle width direction end of the intake duct 6. The air outlet pipe 7 is arranged on a vehicle longitudinal direction front side of the intake duct 6 and is extended up to the vicinity of the opening 6a of the intake duct 6 in a vehicle width direction, and an outer wall 7a of the vehicle width direction end of the air outlet pipe 7 is extended to the vehicle front along the vertical surface S passing the opening 6a of the intake duct 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an engine intake device that purifies air taken in from an intake duct with an air cleaner and then takes it out from an air outlet pipe and supplies it to an engine.

  An engine mounted on the front portion of a vehicle such as a passenger car is provided with an intake device that takes air (outside air) from an intake duct, purifies the air with an air cleaner, and then extracts the air from an air outlet pipe to form an air-fuel mixture. FIG. 5 shows a conventional example of such an intake device.

  That is, FIG. 5 is a plan view of the front portion of the vehicle showing a conventional engine air intake device, and an engine 102 as a drive source is mounted in a horizontally placed state in an engine room 101 in the front portion of the vehicle. A rectangular box-shaped air cleaner 105 that is long in the vehicle front-rear direction is attached. An air intake duct 106 extends rightward from the rear end of the right side of the air cleaner 105, and an opening 106a for taking in air opens toward the right side at the end.

  An air outlet pipe 107 extends from the front end of the right side of the air cleaner 105 toward the right side and is then bent at a right angle and connected to the inlet of the turbocharger 108. From the outlet of the turbo charge 108, the intercooler inlet pipe is connected. 109 extends in front of the air cleaner 105 toward the left side. The intercooler inlet pipe 109 is connected to an intercooler 110 disposed on the left side of the air cleaner 105. Although not shown, an intercooler outlet pipe extends from the intercooler 110, and this intercooler outlet pipe is connected to an intake manifold via a throttle body.

  Thus, the air cleaner 105, the intake duct 106, the air outlet pipe 107, and the like described above constitute an intake device, but when the engine 102 is driven, it is attracted by the intake negative pressure generated in the engine 102. Air (fresh air) is taken into the intake duct 106 from the opening 106 a of the intake duct 106, and this air flows in the intake duct 106 in the direction of the arrow in FIG. 5 and is introduced into the air cleaner 105. The air introduced into the air cleaner 105 is purified by passing through an air cleaner element (not shown) built in the air cleaner 105 and then discharged to the air outlet pipe 107. The air discharged from the air cleaner 105 to the air outlet pipe 107 is introduced into the turbocharger 108 and pressurized, and then introduced into the intercooler 110 from the intercooler inlet pipe 109 to be cooled. It flows from the piping through the throttle body to the intake manifold and is used to form an air-fuel mixture.

  By the way, as in the intake device shown in FIG. 5, the opening 106a, which is the air intake port of the intake duct 106, has a vehicle front portion where the intake air temperature is low for the purpose of improving engine performance, specifically, an engine in the engine room 101. It is laid out at a position that is not affected by the heat from 102 and that travel wind introduced from the front grill 113 into the engine room 101 passes through when the vehicle travels.

  However, since the traveling wind includes foreign matters such as dust and snow, when these foreign matters are sucked into the intake duct 106 together with air from the opening 106a of the intake duct 106, the air cleaner 105 is clogged and the engine 102 is clogged. This causes problems such as a decrease in output.

  Therefore, in Patent Document 1, the opening portion of the intake port member is formed in an elongated shape in the lateral direction along the vehicle body member such as the front upper member, and deflecting means (the vehicle body member itself, the vehicle body is formed over substantially the entire width of the opening portion. A configuration is proposed in which a protrusion formed on a member, a baffle plate attached to a vehicle body member, and the like are provided.

JP 2001-020813 A

  In order to prevent inhalation of foreign matter such as dust and snow from the opening of the intake duct, it is necessary to separate the foreign matter from the traveling wind due to the difference in specific gravity. It needs to be raised near the opening.

  However, in the conventional air intake apparatus shown in FIG. 5, the air intake duct 106 protrudes to the right from the outer wall at the vehicle width direction end of the air outlet pipe 107 arranged in front of the vehicle in plan view. The traveling wind collides with the protruding portion and flows backward while changing the direction. For this reason, the flow direction of the traveling wind does not become a right angle with respect to the intake direction of air into the intake duct 106 (the arrow direction in FIG. 5), and the vicinity of the opening 106a of the intake duct 106 (part B shown in FIG. 5). In other words, there is a problem that air flow (stagnation) having a low flow velocity is generated, and foreign matters such as dust and snow cannot be completely separated from the traveling wind.

  The present invention proposes a means different from Patent Document 1 for solving the above-mentioned problem. The object of the present invention is to reliably prevent the suction of foreign matter from the opening of the intake duct and An object of the present invention is to provide an engine intake device that can solve problems such as a decrease in engine performance caused by clogging.

  In order to achieve the above object, an invention according to claim 1 comprises an air cleaner attached to an engine, an intake duct for introducing air into the air cleaner, and an air outlet pipe for taking out the air purified by the air cleaner, In an intake system for an engine, a duct is disposed above the engine and extends from the air cleaner in the vehicle width direction, and an opening for taking in air is formed at an end of the intake duct in the vehicle width direction. A vertical plane that is disposed on the front side in the vehicle longitudinal direction of the intake duct and extends to the vicinity of the opening of the intake duct in the vehicle width direction, and passes through the opening of the intake duct at the outer wall of the vehicle width direction end of the air outlet pipe It is characterized by extending forward along the vehicle.

  According to a second aspect of the present invention, in the first aspect of the present invention, an oil filler cap is provided at an upper portion of the engine, and an opening portion of the intake duct is disposed in front of the oil filler cap in the vehicle.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the vicinity of the opening of the intake duct is connected to the air outlet pipe.

  According to the first aspect of the present invention, the air outlet pipe arranged on the front side in the vehicle longitudinal direction of the intake duct is extended to the vicinity of the opening of the intake duct in the vehicle width direction, and the outer wall of the end of the air outlet pipe in the vehicle width direction is extended. Since the vehicle extends forward along the vertical plane passing through the opening of the intake duct, the traveling wind that flows in the engine room during vehicle travel is located along the outer wall of the end of the air outlet pipe in the vehicle width direction. The traveling wind flows at high speed toward the rear of the vehicle without changing its direction on the side of the opening of the intake duct. For this reason, slow-flowing air does not stagnate near the opening of the intake duct, and foreign matter such as dust and snow contained in the traveling wind is effectively separated from the traveling wind by the difference in specific gravity, and the opening of the intake duct Thus, foreign matter is reliably prevented from being sucked in, and only air is sucked into the engine through the air cleaner, thereby solving problems such as deterioration in engine performance due to clogging of the air cleaner.

  According to the second aspect of the present invention, even if the configuration in which the oil filler cap is disposed in the vicinity of the opening of the intake duct is employed, the air outlet pipe is disposed close to the front of the opening of the intake duct. The air outlet pipe has an outer wall at the end in the vehicle width direction to increase the flow velocity of the traveling wind passing through the side of the intake duct opening to ensure the separation of the foreign matter from the traveling wind. Inhalation of foreign matter from can be reliably prevented.

  According to the invention described in claim 3, since the vicinity of the opening portion of the intake duct is connected to the air outlet pipe, the outer wall of the end portion in the vehicle width direction of the air outlet pipe with respect to the opening portion of the intake duct can be accurately positioned. The outer wall can increase the flow velocity of the traveling wind passing through the side of the opening of the intake duct to reliably separate the foreign matter from the traveling wind, and reliably prevent the suction of the foreign matter from the opening of the intake duct. .

It is a top view of the vehicle front part provided with the air intake device of the engine which concerns on this invention. It is a right view of the vehicle front part provided with the air intake device of the engine which concerns on this invention. FIG. 2 is a plan view of the front portion of the vehicle showing the engine intake system according to the present invention (enlarged view of the main part of FIG. 1). FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a top view of the vehicle front part which shows the air intake apparatus of the conventional engine.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a plan view of a front portion of a vehicle equipped with an intake device for an engine according to the present invention, FIG. 2 is a right side view of the front portion of the vehicle, and FIG. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3.

  As shown in FIGS. 1 and 2, an engine 2 as a drive source is mounted horizontally in an engine room 1 at the front of the vehicle, and a transmission 3 is connected to the left side of the engine room 1. The driving force is transmitted to the left and right front wheels 4 via the transmission 3 and a differential device (not shown).

  By the way, a rectangular box-shaped air cleaner 5 that is long in the vehicle width direction is attached to the upper part of the engine 2, and a resin intake duct 6 is bent in an S-shape in plan view from the rear end of the right side of the air cleaner 5. While extending toward the right side, an opening 6a for taking in air opens toward the right side at the end.

  Further, from the front end of the right side portion of the air cleaner 5, a rubber air outlet pipe 7 extends obliquely forward toward the right side and is then bent downward at a right angle, and obliquely downward toward the front of the vehicle as shown in FIG. The end thereof is connected to an inlet of a turbocharger 8 disposed in front of the engine 2. As shown in FIGS. 1 and 3, the intercooler inlet pipe 9 extends from the outlet of the turbocharger 8 toward the left side in front of the air cleaner 5, and its end is disposed on the left side of the air cleaner 5. It is connected to the intercooler 10. Although not shown, an intercooler outlet pipe extends from the intercooler 10, and this intercooler outlet pipe is connected to the intake manifold 11 of the engine 2 via a throttle body.

  Thus, the air cleaner 5, the intake duct 6, the air outlet pipe 7 and the like described above constitute the intake device according to the present invention. In the present embodiment, as shown in FIG. 7 is disposed on the front side in the vehicle front-rear direction of the intake duct 6 and extends to the vicinity of the opening 6 a of the intake duct 6 in the vehicle width direction. The outer wall 7a at the vehicle width direction end of the air outlet pipe 7 is located on a vertical plane S passing through the opening 6a of the intake duct 6, and the outer wall 7a is formed on the intake duct 6 as shown in FIG. It extends so as to be inclined obliquely downward toward the front of the vehicle along the vertical plane S passing through the opening 6a.

  In the present embodiment, as shown in FIG. 3, an oil filler cap 12 for opening and closing an oil supply port (not shown) for replenishing oil is provided inside the engine 2. 12, an opening 6a of the intake duct 6 is disposed in front of the vehicle. The intake duct 6 is connected to the air outlet pipe 7 in the vicinity of the opening 6a. That is, as shown in FIGS. 3 and 4, a round bar-like pin 6b extending horizontally toward the front of the vehicle is integrally projected in the vicinity of the opening 6a of the resin-made intake duct 6. 6b is inserted into the fitting hole 7b formed in the mounting portion 7A formed integrally with the rubber air outlet pipe 7 from the rear of the vehicle, so that the vicinity of the opening 6a of the intake duct 6 is the air outlet as described above. It is connected to the pipe 7.

  When the engine 2 including the intake device configured as described above is driven, air (fresh air) is drawn from the opening 6 a of the intake duct 6 by the intake negative pressure generated in the engine 2. The air flows into the air intake duct 6 and flows into the air cleaner 5 in the direction of the arrow in FIG. 3. The air introduced into the air cleaner 5 is purified by passing through an air cleaner element (not shown) built in the air cleaner 5 and then discharged to the air outlet pipe 7. The air discharged from the air cleaner 5 to the air outlet pipe 7 is introduced into the turbocharger 8 driven by the exhaust gas and boosted by a compressor (not shown), and then from the intercooler inlet pipe 9 to the intercooler 10. The refrigerant is introduced and cooled, and flows from an unillustrated intercooler outlet pipe to the intake manifold 11 through the throttle body to be used for air-fuel mixture formation.

  Thus, in the intake device according to the present invention, the air outlet pipe 7 disposed on the front side in the vehicle front-rear direction of the intake duct 6 extends rightward to the vicinity of the opening 6a of the intake duct 6 in the vehicle width direction. Since the outer wall 7a at the end in the vehicle width direction of the outlet pipe 7 is extended forward of the vehicle along the vertical plane S passing through the opening 6a of the intake duct 6, as shown by the arrow in FIG. The traveling wind introduced into the engine room 1 and flowing toward the rear of the vehicle is guided to the side of the opening 6a of the intake duct 6 along the outer wall 7a at the end of the air outlet pipe 7 in the vehicle width direction. The side of the opening 6a of the intake duct 6 flows at high speed toward the rear of the vehicle without changing its direction. For this reason, slow-flowing air does not stagnate in the vicinity of the opening 6a of the intake duct 6, and foreign matters such as dust and snow contained in the traveling wind are effectively separated from the traveling wind due to the difference in specific gravity. Inhalation of foreign matter from the opening 6a is reliably prevented, and only air is sucked into the engine 2 through the air cleaner 5, and problems such as performance degradation of the engine 2 due to clogging of the air cleaner 5 are solved.

  In the present embodiment, since the opening 6a of the intake duct 6 is disposed in front of the oil filler cap 12 provided in the upper part of the engine 2, the oil filler cap 12 is provided in the vicinity of the opening 6a of the intake duct 6. Even if the arrangement is adopted, the air outlet pipe 7 can be arranged in the vicinity of the opening 6 a of the intake duct 6, and the outer wall 7 a at the end in the vehicle width direction of the air outlet pipe 7 can be used. It is possible to increase the flow velocity of the traveling wind passing through the side of the opening 6a of the intake duct 6 to reliably separate the foreign matter from the traveling wind and to reliably prevent the foreign matter from being sucked from the opening 6a of the intake duct 6. it can.

  Furthermore, in the present embodiment, the vicinity of the opening 6a of the intake duct 6 is connected to the air outlet pipe 7 by the pin 6b, so that the outer wall of the end portion in the vehicle width direction of the air outlet pipe 7 with respect to the opening 6a of the intake duct 6 7a can be accurately positioned, and the outer wall 7a increases the flow velocity of the traveling wind passing through the side of the opening 6a of the intake duct 6 to reliably separate foreign matter from the traveling wind. Inhalation of foreign matter from the opening 6a can be prevented more reliably.

  Although the present invention has been described with respect to an embodiment in which the present invention is applied to an intake device for an engine with a turbocharger, the present invention is not limited to a turbocharger, supercharger, or other supercharger, and is a natural intake engine for an ordinary engine. Of course, the same applies to the above.

DESCRIPTION OF SYMBOLS 1 Engine room 2 Engine 3 Transmission 4 Front wheel 5 Air cleaner 6 Air intake duct 6a Air intake duct opening 6b Air intake duct pin 7 Air outlet piping 7A Air outlet piping installation 7a Air outlet piping outer wall 7b Air outlet piping fitting hole 8 Turbocharger 9 Intercooler inlet piping 10 Intercooler 11 Intake manifold 12 Oil filler cap 13 Front grill S Vertical plane passing through the opening of the intake duct

Claims (3)

An air cleaner attached to the engine, an intake duct for introducing air into the air cleaner, and an air outlet pipe for taking out the air purified by the air cleaner, and the intake duct is arranged above the engine so that the vehicle width from the air cleaner In the engine intake device, which extends in the direction and forms an opening for taking in air at the end of the intake duct in the vehicle width direction,
The air outlet pipe is arranged on the front side of the intake duct in the vehicle front-rear direction and extends in the vehicle width direction in the vicinity of the opening of the intake duct, and the outer wall of the end of the air outlet in the vehicle width direction is the opening of the intake duct. An air intake device for an engine, which extends to the front of the vehicle along a vertical plane passing through the section.   The engine intake device according to claim 1, wherein an oil filler cap is provided on an upper portion of the engine, and an opening portion of the intake duct is disposed in front of the oil filler cap in the vehicle.   The engine intake device according to claim 1 or 2, wherein the vicinity of the opening of the intake duct is connected to the air outlet pipe.

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