JPH10103064A - Intake system for supercharged engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the volume of intake air on the downstream side of a supercharger provided for an engine to the least possible level and ensure space for arranging a throttle valve by optimally positioning an intercooler relative to the supercharger. SOLUTION: An intake system for a supercharged engine, which feeds intake air out of a supercharger 2 to an intake manifold 4 through an intercooler 3 arranged above an engine body 1, includes a throttle valve 17 which synchronizes with an accelerator in an intake passage 5 defined on the downstream side of the intercooler 3. The intercooler 3 is installed slantly with respect to a plane perpendicular to the cylinder axis O of the engine body 1 such that its end on the side of the supercharger 2 is lowered and the other end is raised as viewed from its one side in the direction of an output shaft 30 in the engine body 1, and the throttle valve 17 is disposed below the intercooler 3 on the raised side, to thereby reduce the volume of intake air on the downstream side of the supercharger 2 and suitably position the throttle valve 17 for permitting a compact total engine size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake device for a supercharged engine.

[0002]

2. Description of the Related Art Generally, in a vehicle engine, a supercharger is provided in the middle of an intake passage for the purpose of improving output per exhaust volume, and supercharged intake air pressurized by the supercharger is supplied to the engine. Such supercharged engines are widely used.

In the case of the above-described supercharged engine, when the air is compressed by the supercharger, the temperature of the engine intake air rises due to adiabatic compression, so that the charging efficiency of the air taken into the engine decreases. Therefore, an intercooler for cooling the supercharged intake air is provided in an intake passage from the discharge port of the supercharger to the intake manifold to lower the intake air temperature and improve the charging efficiency.

However, the pressure loss of the intake system is a factor affecting the engine performance. When an intercooler is used, the pressure loss of the intake system depends on the position of the supercharger and the position of the intercooler. Therefore, it is necessary to optimally set the position of the supercharger and the position of the intercooler.

[0005] In view of the above requirements, an arrangement in which an intercooler is disposed above an engine body has already been proposed (for example, see Japanese Patent Application Laid-Open No. 5-1566).

[0006]

However, merely by arranging the intercooler above the engine body as in the above-mentioned known example, the intake volume on the downstream side of the supercharger can be reduced (that is, the pressure loss can be reduced). Do) have limitations.

That is, when a turbocharger using exhaust gas as a driving source is used as a supercharger, it is preferable that the supercharger be disposed at a position near the exhaust manifold, and a supercharger using a driving force of an engine as a driving source. When a turbocharger is used as a turbocharger, it is preferable that the turbocharger be located near the engine output shaft.Therefore, there is a restriction that the position of the turbocharger cannot be set too high. The distance to the cooler entrance cannot be shortened.

In some cases, a throttle valve is provided in the intake passage on the downstream side of the intercooler. In order to reduce the size of the entire engine, it is necessary to devise the position of the throttle valve.

Furthermore, when an air-cooled type intercooler is adopted, matching of the flow of the cooling air for air cooling with the attitude of the intercooler is important to maximize the cooling effect.

[0010] The present invention has been made in view of the above points, and by arranging an intercooler in an optimal state in view of the positional relationship with the supercharger, the intake volume on the downstream side of the supercharger can be reduced as much as possible. A first object is to reduce the size and secure a space for disposing the throttle valve, and to achieve the maximum cooling effect in the intercooler in addition to the first object. The purpose is.

[0011]

According to a first basic configuration of the present invention, as a means for solving the above-described problems, an intake manifold is provided through an intercooler disposed above an engine body, the intake air being supplied from a supercharger. In the intake device of a supercharged engine provided with a throttle valve interlocking with an accelerator in a downstream intake passage of the intercooler, the intercooler is disposed in one of the output shaft directions of the engine body. From the side, the turbocharger side is mounted at a low position and the anti-supercharger side is mounted at a high position, and is inclined with respect to a plane perpendicular to the cylinder axis of the engine body. To reduce the intake volume on the downstream side of the turbocharger and to provide a suitable arrangement of the throttle valve (that is, the compactness of the entire engine). So as to obtain the reduction).

In the first basic configuration of the present invention, when the inlet and the outlet of the intercooler are located on the supercharger side and the anti-supercharger side, respectively, the space from the discharge port of the supercharger to the intercooler is provided. This is preferable in that the distance can be significantly reduced, and the intake volume downstream of the supercharger can be reduced.

When the discharge port of the turbocharger and the inlet of the intake manifold are located between the two cylinders in the cylinder row direction of the engine body, the configuration of the engine body (ie, the arrangement of the exhaust manifold) This is preferable in that the supercharger and the intercooler can be arranged without being restricted by the installation position or the arrangement position of the auxiliary equipment.

Further, the engine main body is installed in an engine room formed in a front portion of the vehicle body so that an output shaft thereof is in a direction orthogonal to a front-rear direction of the vehicle body, and the intercooler is installed in the engine room. When the vehicle is positioned along the lower surface of the hood, the exhaust system can be located in front of the vehicle.This prevents exhaust heat from being trapped in the engine room and reduces the heat effect on the intercooler. This is preferable because a compact arrangement can be obtained, and the cooling air can be efficiently introduced into the intercooler taken in from the hood.

Further, the output shaft of the engine main body in the engine room formed at the front of the vehicle body is in the front-rear direction of the vehicle body, and the intercooler has a substantially horizontal posture when viewed from one side of the output shaft direction of the engine main body. When a slant is installed, the compact arrangement of the entire engine can be obtained while avoiding interference with devices such as the master cylinder, and cooling air can be efficiently introduced into the intercooler that is taken in from the bonnet. Is preferred.

Further, a turbocharger using exhaust gas as a driving source is adopted as the supercharger, and its blower side is the auxiliary machine side of the engine main body, and the turbine side is the output shaft outlet side of the engine main body. And a bonnet covering the engine room, at the center of the inlet tank in the intercooler, while providing a supercharged intake inlet in a position oriented from the discharge port of the turbocharger toward the output shaft lead-out side of the engine body. The engine room is configured such that the distance between the lower surface of the engine body and the output shaft of the engine main body becomes larger toward the output shaft output side, and the intercooler is viewed from above the engine main body on the output shaft output side of the engine main body. And between the peripheral edge of the upper surface of the intercooler and the bonnet, When an elastic seal member is provided to seal between the peripheral edge of the upper surface of the cooler and the bonnet and guide the cooling air introduced from the bonnet to the intercooler, in a vertical engine, the distance between the top of the engine and the lower surface of the bonnet is reduced. Using the engine mounting attitude and the inclination of the bonnet line, the output shaft output side of the engine body (ie,
It is possible to increase the size of the intercooler in this portion, and it is preferable to dispose the intercooler in this portion since the heat dissipation of the intercooler can be improved while maintaining the bonnet line at a constant height.

In addition, a turbocharger using exhaust gas as a driving source is employed as the supercharger, and a blower side thereof is an auxiliary machine side of the engine body.
If the turbine side is arranged so as to be on the output shaft lead-out side of the engine body, the exhaust system can be arranged on the rear side of the vehicle, so that the connection with the exhaust pipe becomes easy and the overall engine can be made more compact. This is preferable in that a further reduction in the intake volume on the downstream side of the feeder can be obtained. In this case, if the supercharged intake port is provided at the center of the inlet tank of the intercooler with a posture directed from the discharge port of the turbocharger toward the output shaft deriving direction of the engine body, the supercharged intake in the intercooler is provided. The cooling performance is improved because the drift can be prevented.

Further, when the intercooler is arranged so that the flow direction of the supercharged air flowing from the inlet side to the outlet side in the intercooler intersects with the direction of the cooling air introduced from the hood. Heat exchange between the entire supercharged intake air flowing through the intercooler and the cooling air is obtained, which is preferable in that the cooling performance is improved. In this case, when a guide member for guiding the cooling air introduced from the bonnet to the windward portion of the intercooler is provided at a substantially central portion of the upper surface of the intercooler, the traveling wind is partially formed on the core surface of the intercooler due to its inertia. As a result, the cooling performance of the intercooler is further improved. Further, in this case, when the guide member is formed integrally with an elastic seal member that seals between the upper peripheral portion of the intercooler and the bonnet, the structure can be simplified and the cooling of the intercooler can be achieved. The performance can be further improved.

Further, when the intake and exhaust outlets of the engine body are in the same direction, the intake passage must be longer than in the case where the intake and exhaust outlets are in opposite directions. Arranging the intercooler below the high side is preferable because it can contribute to reducing the intake volume. In this case,
A throttle valve mechanically interlocked with an accelerator is adopted as the throttle valve, and a throttle valve having a smaller external shape than the throttle valve and acting as a fail-safe system is disposed in the intake passage downstream of the throttle valve. Since two valves (i.e., a throttle valve and a throttle valve) can be arranged in the intake passage configuration described above, the intake volume can be further reduced, and the valve can be arranged according to the size of the extra space below the intercooler. Can further contribute to compactness. Further, in this case, if an intake shutter that is fully closed when the engine is stopped is adopted as the throttle valve, it is suitable as a diesel engine, while reducing the intake volume downstream of the intake shutter and reducing shock during key-off. Can be achieved.

In the case where an exhaust gas introduction portion for recirculating a part of the exhaust gas to the intake side is provided in the intake passage downstream of the throttle valve, condensed water and carbon contained in the exhaust gas may be removed from the throttle valve side. This is preferable in that it does not enter the throttle valve and the throttle valve does not malfunction due to freezing of condensed water or carbon adhesion. In this case, if a portion higher than the exhaust gas introduction portion is provided in the intake passage from the throttle valve to the exhaust gas introduction portion, or if the exhaust gas introduction portion is lower than the throttle valve, the throttle valve It is possible to reliably prevent condensed water from entering the side and freeze due to the condensed water.

Further, when a portion lower than the throttle valve is formed in an intake passage extending from the outlet of the intercooler to the throttle valve, the moisture contained in the supercharged air cooled by the intercooler (ie, Condensed water)
Is reliably prevented from entering the throttle valve side, and the malfunction of the throttle due to icing or the like can be reliably prevented.

When the intake inlet and the exhaust outlet of the engine body are located opposite to each other and the throttle valve is disposed above an intake manifold connected to the intake inlet, the intake volume on the downstream side of the supercharger may be reduced. Is preferred because it can be greatly reduced.

According to a second basic configuration of the present invention, as a means for solving the above-mentioned problems, a configuration is adopted in which intake air from a supercharger is supplied to an intake manifold via an intercooler disposed above an engine body. In the intake device of a supercharged engine provided with a throttle valve interlocked with an accelerator in a downstream intake passage of the intercooler, the intercooler is supercharged when viewed from one side of an output shaft direction of the engine body. The direction of flow of supercharged air that is inclined with respect to a plane perpendicular to the cylinder axis of the engine body so that the engine side is low and the anti-supercharger side is high, and that flows through the intercooler from the inlet side to the outlet side And the direction of introduction of the cooling air introduced from the hood intersects with each other, and the throttle valve is positioned below the high side of the intercooler. To reduce the intake air volume on the downstream side of the supercharger, to obtain heat exchange between the entire supercharged air flowing through the intercooler and the cooling air, and to suitably arrange the throttle valve (ie, (To make the whole engine more compact).

In the second basic configuration of the present invention, the engine main body is installed in an engine room formed in a front part of the vehicle body so that an output shaft thereof is in a direction orthogonal to a vehicle front-rear direction. The intercooler has a posture along the lower surface of the hood covering the engine room, and the intercooler has a communication part with the supercharger on one side and a communication part with the intake manifold on the other side in the engine output axis direction. When it is formed, the exhaust system can be located on the front side of the vehicle, so that exhaust heat does not stay in the engine room and the heat effect on the intercooler can be reduced, while a compact arrangement of the entire engine is obtained. The cooling air can be efficiently introduced into the intercooler that is taken in from the hood, and Preferable in that the intake volume can be greatly reduced.

In addition, a turbocharger using exhaust gas as a driving source is employed as the supercharger, and a blower side thereof is an auxiliary machine side of the engine body.
If the turbine side is arranged so as to be on the output shaft lead-out side of the engine body, the exhaust system can be arranged on the rear side of the vehicle, so that the connection with the exhaust pipe becomes easy and the overall engine can be made more compact. This is preferable in that a further reduction in the intake volume on the downstream side of the feeder can be obtained.

When a guide member for guiding the cooling air introduced from the bonnet to the windward portion of the intercooler is provided substantially at the center of the upper surface of the intercooler, the running air is subjected to the inertia of the core surface of the intercooler. , And it is preferable in that the cooling performance of the intercooler is further improved.

In a third basic configuration of the present invention, as a means for solving the above-mentioned problem, a configuration is adopted in which intake air from a supercharger is supplied to an intake manifold via an intercooler disposed above an engine body. In the intake device of a supercharged engine provided with a throttle valve interlocked with an accelerator in a downstream intake passage of the intercooler, the intercooler is supercharged when viewed from one side of an output shaft direction of the engine body. The engine side is mounted at a low position and the anti-supercharger side is mounted at a high position, and is inclined with respect to a plane perpendicular to the cylinder axis of the engine body, and a discharge port of the turbocharger is provided at a central portion of an inlet tank of the intercooler. A supercharged air intake port is provided in a position facing the output shaft deriving direction side of the engine body from above, and the upper surface of the intercooler is approximately In the center, a guide member for guiding the cooling air introduced from the bonnet to the windward portion of the intercooler is provided, and the throttle valve is disposed below the high side of the intercooler, so that the downstream side of the supercharger is provided. While reducing the intake air volume of the intercooler, the drift of the supercharged air in the intercooler is prevented, and the traveling wind is prevented from partially hitting the core surface of the intercooler due to its inertia, thereby improving the cooling performance of the intercooler. A suitable arrangement of the throttle valve (that is, downsizing of the entire engine) is obtained.

In the third basic structure of the present invention, when the guide member is formed integrally with an elastic seal member for sealing between a peripheral portion of the upper surface of the intercooler and the bonnet, the structure is simplified. Can be done,
This is preferable because the cooling performance of the intercooler can be further improved.

Further, when the engine body is mounted in a slant such that the output shaft thereof is in the front-rear direction of the vehicle body and the intercooler is in a substantially horizontal posture in an engine room formed in a front portion of the vehicle body, a master cylinder or the like is provided. This is preferable in that a compact arrangement of the entire engine in a state where interference with equipment is avoided can be obtained, and cooling air can be efficiently introduced into the intercooler taken in from the hood.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 5 show an intake device for a supercharged engine according to a first embodiment of the present invention.

This intake device pressurizes air supplied through an air cleaner (not shown) to form supercharged intake air, and cools the supercharged intake air supplied from the supercharger 2. An intake system is provided in which an air-cooled intercooler 3 and an intake manifold 4 connected to an intake inlet 1 a of the engine body 1 are sequentially connected by an intake pipe 5.

The engine body 1 is, for example, an I-type four-cylinder diesel engine having four cylinders 6, 6,... (See FIG. 2). The output shaft 30 is set to be in a direction orthogonal to the vehicle front-rear direction (that is, in a horizontal state).
is set up. In the present embodiment, the engine body 1 has an intake inlet 1a to which the intake manifold 4 is connected and an exhaust outlet 1 to which the exhaust manifold 7 is connected.
b is on one side with respect to the direction of the engine output shaft 30 (that is,
It is of the same flow type formed on the front side of the vehicle). The front part of the engine body 1 (in other words,
Various accessories are disposed on the side opposite to the output shaft deriving portion), but only the alternator 8 provided on the side on which the supercharger is disposed is shown.

The supercharger 2 is a turbocharger driven by exhaust gas supplied from an exhaust manifold 7, and has a blower 2 a having a front side (ie, an auxiliary machine side) of the engine body 1. ) And the turbine 2b
It is arranged so that the side is the output shaft 30 lead-out side in the engine body 1.

The intercooler 3 has an inlet tank 9
And a core portion 11 having a heat transfer tube 12 and a heat transfer fin 13 for connecting the two tanks 9 and 10 and through which supercharged air flows, and which is located above the engine body 1. Output shaft 30 of the engine body 1
When viewed from one side of the direction, the supercharger 2 side (in other words, the inlet tank 9 side) is at a low position and the anti-supercharger side (in other words,
(The outlet tank 10 side) is mounted at a position inclined with respect to a plane perpendicular to the cylinder axis O of the engine body 1 so as to be at a high position, and along a lower surface of the hood 24 covering an upper part of the engine room R. I have. Reference numeral 28 denotes a bracket for supporting the intercooler 3 with respect to the engine body 1.

In this way, a compact layout avoiding interference with the auxiliary equipment (for example, the alternator 8) can be obtained, and the configuration of the engine body 1 (ie, the arrangement position of the exhaust manifold 7 or the auxiliary equipment) ), The supercharger 2 and the intercooler 3 can be arranged. Further, the distance between the supercharger 2 and the inlet side of the intercooler 3 can be reduced without raising the position of the supercharger 2. Therefore, while reducing the intake volume on the downstream side of the supercharger 2, the entire engine can be made compact, and the height of the hood 24 can be reduced.
Moreover, since the exhaust system can be located on the front side of the vehicle, the exhaust heat is not trapped in the engine room, and the heat influence on the intercooler 3 can be reduced.
Cooling air can be efficiently introduced into the intercooler 3 taken in from the hood 24.

The discharge port 14 of the blower 2a in the supercharger 2 and the inlet 4a of the intake manifold 4 are
The engine body 1 is located between the two end cylinders in the row direction of the cylinders 6, 6,.... Moreover,
At the center of the inlet tank 9 of the intercooler 3, a supercharged intake inlet 15 is provided in a posture that is directed from the discharge port 14 of the blower 2 a of the supercharger 2 to the direction in which the output shaft 30 of the engine body 1 is drawn out. Is provided. By doing so, the cooling performance is improved because the drift of the supercharged intake air in the intercooler 3 can be prevented.

Further, a supercharged intake outlet 16 serving as a supercharged intake outlet is provided in the outlet tank 10 of the intercooler 3 on the front side of the engine (in other words, on the auxiliary device side). The intake pipe 5 serving as an intake passage extending from the supercharged intake outlet 16 through the excess space S formed between the intercooler 3 and the engine body 1 to the intake manifold 4 in a substantially linear manner is provided in the intake pipe 5. A throttle valve 17 mechanically linked to an accelerator (not shown); and an intake shutter 18 having a smaller outer shape than the throttle valve 17 and acting as a throttle valve acting as a fail-safe system (ie, fully closed when the engine is stopped). Are sequentially arranged. For example, the throttle valve 17 is located in a surplus space S formed below a higher side (in other words, an outlet side) of the intercooler 3, and
Is located immediately downstream of the throttle valve 17.

Since the opening of the throttle valve 17 is controlled in order to control the amount of intake air, a high roundness is required (that is, a high internal machining accuracy is required).
However, it is necessary to make it a separate structure from the intake pipe 5,
A connection flange 17a is required. Therefore, the throttle valve 17 becomes considerably larger than the outer diameter of the intake pipe 5. On the other hand, since the intake shutter 18 can be fully closed and fully opened, the intake shutter 18 can be integrated with the intake pipe 5, and the throttle valve 1
The diameter is smaller than 7.

With such a layout, the turbocharger 2 can be used despite the same flow engine.
The intake pipe 5 serving as an intake passage from the air cooler 3 to the intercooler 3 and the intake pipe 5 serving as an intake passage from the intercooler 3 to the intake manifold 4 are both shortest, and the intake volume downstream of the supercharger 2 can be reduced. In addition, the arrangement of the throttle valve 17 and the intake shutter 18 can be obtained in a state that matches the size of the space formed below the intercooler 3, and the overall engine can be made compact.

When the supercharged intake air is cooled in the intercooler 3, the water contained in the intake air is condensed to form condensed water. If the condensed water enters the throttle valve 17, there is a possibility that the condensed water will freeze in winter or the like, which may cause a malfunction of the throttle valve 17. Therefore, in the present embodiment, a portion lower than the throttle valve 17 (that is, a U-shaped pipe 19) is provided in the intake pipe 5 serving as an intake passage from the outlet of the intercooler 3 to the throttle valve 17. ) Is formed to reliably prevent condensed water from entering the throttle valve 17 side.

Further, a part of the exhaust gas is passed through an exhaust gas recirculation passage 20 and an exhaust gas recirculation valve (hereinafter referred to as EG) to an intake pipe 5 which is a downstream intake passage of the intake shutter 18.
An exhaust gas introduction section 22 is provided for recirculating to the intake side via an R valve 21). The intake pipe 5 serving as an intake passage extending from the intake shutter 18 to the exhaust gas introduction section 22 is provided with a portion higher than the exhaust gas introduction section 22 (i.e., a channel 23). I have.
With such a configuration, moisture and carbon contained in the exhaust gas do not enter the intake shutter 18 and the throttle valve 17 side, and the valve may malfunction due to freezing of condensed water or adhesion of carbon. Disappears.
The exhaust gas introduction unit 22 may be lower than the intake shutter 18 in some cases.

The cooling air W for cooling the intercooler 3 is introduced from a cooling air inlet 25 formed in the hood 24 covering the upper part of the engine room R. Core part 1 of 3
Part 1 (for example, more on the back side). Therefore,
In this embodiment, as shown in FIGS. 3 to 5, a cooling air W introduced from a cooling air inlet 25 of the bonnet 24 is supplied to a windward side of the intercooler 3 at a substantially central portion of the upper surface of the intercooler 3. A guide member 26 for guiding to the portion is provided to be orthogonal to the direction of the heat transfer tube 12. By doing so, the cooling air W is applied to the entire area of the core portion 11 of the intercooler 3, and the cooling performance is further improved.

Further, in the present embodiment, the guide member 26 is an elastic sealing member 27 for sealing between the peripheral edge of the upper surface of the intercooler 3 and the bonnet 24.
And a rigid member formed integrally therewith. With this configuration, in a state where the hood 24 is closed, as shown in FIG. 5, the guide member 26 projects into the cooling air introduction port 25 without deforming, and exhibits the cooling air guiding function. The elastic seal member 27 is deformed as shown by a dashed line due to the pressure contact force of the bonnet 24, and seals the bonnet 24 and the peripheral edge of the upper surface of the intercooler 3. Therefore, the structure can be simplified, and the cooling performance of the intercooler 3 can be further improved.

Second Embodiment FIGS. 6 to 10 show an intake device for a supercharged engine according to a second embodiment of the present invention.

In this case, the engine body 1 has its output shaft 30 in an engine room R formed at the front of the vehicle body.
The slant is mounted in a state where the cylinder axis O is inclined at a predetermined angle α so that the intercooler 3 has a substantially horizontal posture when viewed from one side in the output shaft 30 direction. Have been. In addition, the intercooler 3 is oriented along the central portion of the hood 24 in the vehicle width direction.

The engine room R is provided between the lower surface of the hood 24 covering the engine room R and the engine body 1.
The distance from the output shaft 30 to the output shaft 30 is increased so that the distance from the output shaft 30 to the output shaft 30 increases, and the intercooler 3 is closer to the output shaft 30 discharge side of the engine body 1 when viewed from above the engine body 1. It is arranged. Symbol C is the axis of the engine output shaft 30.

With the above configuration, a compact arrangement of the entire engine in a state where interference with devices such as a master cylinder arranged in the engine room R is avoided can be obtained. In a vertical engine, the engine body 1
The distance between the top of the engine and the lower surface of the bonnet 24 can be increased on the output shaft 30 lead-out side (ie, the transmission 31 side) of the engine body 1 using the engine mounting posture and the inclination of the bonnet line. By arranging the intercooler 3 in the portion, the heat radiation of the intercooler 3 can be improved while maintaining the bonnet line at a constant height. Furthermore, the cooling air inlet 2 of the bonnet 24
The cooling air can be efficiently introduced into the intercooler 3 which is taken in from the cooling unit 5. In addition, the exhaust system can be arranged on the rear side of the vehicle, and connection with the exhaust pipe becomes easy.

In this case, the flow direction of the supercharged air flowing from the inlet side to the outlet side in the intercooler 3 (in other words, the extending direction of the heat transfer tube 12).
And the direction of introduction of the cooling air W introduced from the cooling air introduction port 25 of the hood 24 is arranged to intersect. Further, the guide member 2 in the intercooler 3
6 is provided so as to be parallel to the heat transfer tube 12 at the center of the core portion 11. With this configuration, heat exchange between the entire supercharged intake air flowing through the intercooler 3 and the cooling air W is obtained, and the cooling performance is further improved.

The other configuration, operation, and effect are the same as those in the first embodiment, and the description is omitted.

Third Embodiment FIGS. 11 and 12 show an intake device for a supercharged engine according to a third embodiment of the present invention.

In this case, as in the first embodiment, the output shaft 30 of the engine body 1 is in a direction orthogonal to the vehicle longitudinal direction in the engine room R formed in the front part of the vehicle body. (I.e., in a horizontal position), and is of a cross-flow type in which the intake port 1a and the exhaust port 1b of the engine body 1 are formed at positions opposite to each other with respect to the engine output shaft 30.

The intercooler 3 is located above the engine body 1 and has an inlet tank 9 and an outlet tank 1.
0 are arranged before and after in the direction of the output shaft 30 of the engine main body 1 (that is, on the auxiliary device disposition side and the output shaft deriving side), and when viewed from one side of the output shaft 30 direction of the engine main body 1, The engine is mounted in a posture inclined along a plane perpendicular to the cylinder axis of the engine body 1 and along the lower surface of the hood 24 covering the upper part of the engine room R so that the engine side becomes lower and the anti-supercharger side becomes higher. Have been.

Accordingly, the supercharged intake port 15 in the inlet tank 9 of the intercooler 3 has a passage length of the intake pipe 5 serving as an intake path from the discharge port 14 of the supercharger 2 to the supercharged intake port 15. The inlet pipe 9 is formed at a position near the supercharger 2 in order to minimize the length, and the intake pipe 5 extends forward (that is, on the side where auxiliary equipment is provided). on the other hand,
The supercharged intake outlet 16 in the outlet tank 10 of the intercooler 3 is formed at a position near the intake manifold 4 in the outlet tank 10 to prevent the supercharged air from flowing in the core portion 11 of the intercooler 3. The intake pipe 5 serving as an intake passage extending from the supercharged intake outlet 16 to the inlet 4a of the intake manifold 4 is directed forward (ie,
(Auxiliary equipment side).

The throttle valve 17 is located below the intercooler 3 and above the intake manifold 4 in the intake pipe 5 serving as an intake passage extending from the supercharged intake outlet 16 to the intake manifold 4. It is arranged. Reference numeral 29 denotes a surge tank.

With the above layout, the intake volume on the downstream side of the turbocharger 2 can be greatly reduced, and the heat transfer tubes 12 in the intercooler 3 are orthogonal to the vehicle longitudinal direction. 3, the flow direction of the supercharged air flowing from the inlet side to the outlet side and the direction of introduction of the cooling air W introduced from the cooling air inlet 22 in the bonnet 24 intersect with each other. Heat exchange between the entire supply air and the cooling air W is obtained, and the cooling performance is further improved.

In this case, as in the second embodiment, the guide member 26 of the intercooler 3 is
The core portion 11 is provided so as to be parallel to the heat transfer tube 12 at the central portion.

The other configuration and operation and effect are the same as those in the first embodiment, and the description is omitted.

In each of the above embodiments, a diesel engine is described as an example. However, it is needless to say that the present invention can be applied to a gasoline engine.

[0060]

According to the present invention, the intercooler for cooling the supercharged air from the supercharger is provided above the engine main body when viewed from one side in the output shaft direction of the engine main body. The engine is mounted so as to be tilted with respect to a plane perpendicular to the cylinder axis of the engine body so that the engine is at a low position and the anti-supercharger side is at a high position, and the throttle valve is arranged below the high side of the intercooler. So, without raising the turbocharger installation position,
The intake air volume on the downstream side of the turbocharger can be reduced, and the inclined position of the intercooler allows the throttle valve to be arranged by utilizing the extra space formed below the high side of the intercooler. As a result, there is an excellent effect that both the downsizing of the entire engine and the reduction of the volume of the intake system can be achieved.

An intercooler for cooling the supercharged air from the supercharger is provided above the engine body.
As viewed from one side of the output shaft direction of the engine body, the turbocharger side is low and the anti-supercharger side is high, and the throttle valve is mounted obliquely with respect to a plane perpendicular to the cylinder axis of the engine body. The layout in which the cooling air is introduced from the inlet side to the outlet side in the intercooler and the introduction direction of the cooling air introduced from the bonnet are arranged such that the layout is arranged below the high side of the intercooler. If the contact area between the supercharged air flowing through the intercooler and the cooling air is increased so as to intersect with each other, the above-described effect (that is, both the downsizing of the entire engine and the reduction of the intake system volume) can be achieved. In addition to this, an excellent effect that the cooling performance of the intercooler can be greatly improved can be obtained.

An intercooler for cooling the supercharged intake air from the supercharger is provided above the engine body.
As viewed from one side of the output shaft direction of the engine body, the turbocharger side is low and the anti-supercharger side is high, and the throttle valve is mounted obliquely with respect to a plane perpendicular to the cylinder axis of the engine body. A layout that is disposed below the high side of the intercooler, and furthermore, in a central portion of the inlet tank in the intercooler, a posture directed from the discharge port of the supercharger to the output shaft leading direction side of the engine body. A supercharged air inlet is provided, and a guide member for guiding cooling air introduced from the bonnet to an upwind portion of the intercooler is provided at a substantially central portion of the upper surface of the intercooler, and the supercharged air flowing through the intercooler is provided. The above-mentioned effects (that is, the downsizing of the entire engine and the intake system volume) can be achieved by preventing the drift of the cooling air and the drift of the cooling air. In addition to both) of the small capacity of over beam, an excellent effect that the cooling performance in the intercooler can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an intake device of a supercharged engine according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an intake device of the supercharged engine according to the first embodiment of the present invention.

FIG. 3 is an enlarged plan view of an intercooler portion in the intake device of the supercharged engine according to the first embodiment of the present invention.

FIG. 4 is an enlarged front view of an intercooler portion in the intake device of the supercharged engine according to the first embodiment of the present invention.

FIG. 5 is a partial sectional view taken along line VV of FIG. 4;

FIG. 6 is a front view showing an intake device of a supercharged engine according to a second embodiment of the present invention.

FIG. 7 is a side view, partially omitted, showing an intake device of a supercharged engine according to a second embodiment of the present invention;

FIG. 8 is an enlarged plan view of an intercooler portion in an intake device of a supercharged engine according to a second embodiment of the present invention.

FIG. 9 is an enlarged front view of an intercooler part in an intake device of a supercharged engine according to a second embodiment of the present invention.

FIG. 10 is a partial sectional view taken along line XX of FIG. 8;

FIG. 11 is a front view showing an intake device of a supercharged engine according to a third embodiment of the present invention.

FIG. 12 is a plan view showing an intake device of a supercharged engine according to a third embodiment of the present invention.

[Description of Signs] 1 is an engine body, 1a is an intake inlet, 1b is an exhaust outlet,
2 is a turbocharger (turbocharger), 2a is a blower, 2b
Is a turbine, 3 is an intercooler, 4 is an intake manifold, 4a is an inlet, 5 is an intake passage (intake pipe), 6 is a cylinder,
9 is an inlet tank, 10 is an outlet tank, 14 is a discharge port, 1
5 is a supercharged intake port, 17 is a throttle valve, 18 is a throttle valve (intake shutter), 19 is a U-shaped pipe, 20 is an exhaust gas recirculation passage, 21 is an exhaust gas recirculation valve, and 22 is exhaust gas. Introductory part, 23 is a curved pipe part, 24 is a bonnet,
25 is a cooling air inlet, 26 is a guide member, 27 is an elastic seal member, 30 is an output shaft, O is a cylinder axis, and S is a surplus space.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hirotaka Kaneko 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Inventor Hiroaki Ueda 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. Inside

Claims (26)

[Claims] 1. A throttle valve which is configured to supply intake air from a supercharger to an intake manifold via an intercooler arranged above an engine body, and has a throttle valve interlocked with an accelerator in a downstream intake passage of the intercooler. An intake device for a supercharged engine provided, wherein the intercooler is configured such that a supercharger side is low and an anti-supercharger side is high when viewed from one side of an output shaft direction of the engine body. An intake device for a supercharged engine, wherein the throttle valve is mounted obliquely with respect to a plane perpendicular to a cylinder axis of the engine body, and the throttle valve is disposed below a higher side of the intercooler. 2. The intake device for a supercharged engine according to claim 1, wherein an inlet and an outlet of the intercooler are located on a supercharger side and a non-supercharger side, respectively. . 3. The engine according to claim 1, wherein a discharge port of the supercharger and an inlet of the intake manifold are located between both ends of the cylinder in the cylinder row direction of the engine body. Item 3. An air intake device for a supercharged engine according to any one of Items 2. 4. The engine body is installed in an engine room formed in a front part of a vehicle body such that an output shaft thereof is in a direction orthogonal to a vehicle front-rear direction.
The air intake device for a supercharged engine according to any one of claims 1 to 3, wherein the intercooler is positioned along a lower surface of a hood covering an engine room. 5. The engine body has an output shaft extending in a vehicle front-rear direction in an engine room formed at a front portion of the vehicle body, and the intercooler is substantially horizontal when viewed from one side of the output shaft direction of the engine body. The intake device for a supercharged engine according to any one of claims 1 to 3, wherein the intake device is mounted with a slant such that 6. The turbocharger is a turbocharger that uses exhaust gas as a driving source. A blower side of the turbocharger is a side where auxiliary equipment is provided in the engine body, and a turbine side is a side where an output shaft of the engine body is led out. The intake device for a supercharged engine according to any one of claims 1 to 5, wherein the intake device is arranged so as to be arranged as follows. 7. A supercharged intake port is provided at a central portion of an inlet tank of the intercooler, with a posture directed from a discharge port of the turbocharger to a direction in which an output shaft of the engine body is led out. The intake device for a supercharged engine according to claim 6, wherein: 8. The turbocharger is a turbocharger that uses exhaust gas as a driving source. A blower side of the turbocharger is an auxiliary machine side of the engine body, and a turbine side of the turbocharger is an output shaft outlet side of the engine body. The turbocharger is provided with a supercharged intake introduction port at a central portion of an inlet tank of the intercooler in a posture directed from a discharge port of the turbocharger to a direction in which an output shaft of the engine body is led out. The engine room is configured such that the distance between the lower surface of the hood covering the room and the output shaft of the engine body becomes larger toward the output shaft side, and the intercooler of the engine body is viewed from above the engine body. The output shaft is disposed closer to the outlet side, and an inner space is provided between a peripheral edge of an upper surface of the intercooler and the hood. 6. The turbocharger according to claim 5, further comprising an elastic seal member that seals a gap between an upper peripheral portion of the tar cooler and the bonnet and guides cooling air introduced from the bonnet to the intercooler. Engine intake device. 9. The intercooler is arranged such that the direction of flow of the supercharged air flowing from the inlet side to the outlet side in the intercooler intersects the direction of introduction of the cooling air introduced from the bonnet. The intake device for a supercharged engine according to any one of claims 1 to 8, characterized in that: 10. A guide member for guiding cooling air introduced from a hood to a windward portion of the intercooler is provided at a substantially central portion of an upper surface of the intercooler. Intake system for turbocharged engines. 11. The supercharger according to claim 10, wherein the guide member is formed integrally with an elastic seal member that seals a gap between an upper peripheral portion of the intercooler and a bonnet. Engine intake device. 12. The supercharged engine according to claim 1, wherein an intake inlet and an exhaust outlet of the engine body are on the same side of the engine body. Intake device. 13. The throttle valve, wherein the throttle valve is mechanically linked to an accelerator, and a throttle valve having a smaller outer shape than the throttle valve and acting as a fail-safe system is provided in a downstream intake passage of the throttle valve. The intake device for a supercharged engine according to claim 12, wherein: 14. The intake system for a supercharged engine according to claim 13, wherein the throttle valve is an intake shutter that is fully closed when the engine is stopped. . 15. An exhaust gas introduction portion for recirculating a part of exhaust gas to an intake side is provided in a downstream intake passage of the throttle valve. An intake device for a supercharged engine according to any one of claims 1 to 4. 16. The supercharger according to claim 15, wherein a portion higher than the exhaust gas introduction portion is provided in an intake passage from the throttle valve to the exhaust gas introduction portion. Engine intake system with 17. The air intake system for a supercharged engine according to claim 15, wherein the exhaust gas introduction section is lower than the throttle valve. 18. The intake passage from the outlet of the intercooler to the throttle valve, wherein a portion lower than the throttle valve is formed in the intake passage. An air intake device for a supercharged engine according to claim 1. 19. An intake port and an exhaust port of the engine body are located opposite to each other, and the throttle valve is disposed above an intake manifold connected to the intake port. Item 1
An intake system for a supercharged engine according to any one of claims 11 to 11. 20. A throttle valve which is configured to supply intake air from a supercharger to an intake manifold via an intercooler disposed above an engine body, and has a throttle valve interlocked with an accelerator in a downstream intake passage of the intercooler. An intake device for a supercharged engine provided, wherein the intercooler is configured such that a supercharger side is low and an anti-supercharger side is high when viewed from one side of an output shaft direction of the engine body. The direction of the supercharged air that is inclined with respect to the plane perpendicular to the cylinder axis of the engine body and that flows from the inlet side to the outlet side in the intercooler intersects the direction of the cooling air introduced from the bonnet. , And the throttle valve is disposed below a higher side of the intercooler. 21. The engine main body is installed in an engine room formed at a front part of a vehicle body such that an output shaft thereof is in a direction orthogonal to a front-rear direction of the vehicle body. And the intercooler has a communication portion with the turbocharger on one side and a communication portion with the intake manifold on the other side in the engine output axis direction. 3. The method of claim 2, wherein
0. An intake device for a supercharged engine according to 0. 22. The supercharger is a turbocharger that uses exhaust gas as a driving source. The blower side is an auxiliary machine side of the engine body, and the turbine side is an output shaft outlet side of the engine body. The intake device for a supercharged engine according to any one of claims 20 and 21, wherein the intake device is arranged to be arranged as follows. 23. The intercooler according to claim 20, wherein a guide member for guiding cooling air introduced from a bonnet to a windward portion of the intercooler is provided at a substantially central portion of an upper surface of the intercooler. Claim 2
3. The intake device for a supercharged engine according to claim 2. 24. A throttle valve, which is configured to supply intake air from a supercharger to an intake manifold via an intercooler disposed above an engine body, and has a throttle valve interlocked with an accelerator in a downstream intake passage of the intercooler. An intake device for a supercharged engine provided, wherein the intercooler is configured such that a supercharger side is low and an anti-supercharger side is high when viewed from one side of an output shaft direction of the engine body. The engine is mounted obliquely with respect to a plane perpendicular to the cylinder axis, and the center of the inlet tank in the intercooler is oriented from the discharge port of the turbocharger in the direction toward the output shaft of the engine main body. A supercharging intake port is provided, and cooling air introduced from a bonnet is supplied to the intercooler substantially at the center of the upper surface of the intercooler. A guide member is provided for guiding to a windward portion of the engine, and the throttle valve is disposed below a higher side of the intercooler. 25. The supercharger with a supercharger according to claim 24, wherein the guide member is formed integrally with an elastic seal member for sealing between a peripheral edge of an upper surface of the intercooler and a bonnet. Engine intake device. 26. The engine body is slant-mounted such that an output shaft thereof is in a front-rear direction of the vehicle body and an intercooler is in a substantially horizontal posture in an engine room formed in a front part of the vehicle body. The intake device for a supercharged engine according to any one of claims 24 and 25, wherein: