JP2007327440A - Engine with supercharger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a resin intake introducing duct 31 from being affected by th influence of radiation heat from a turbine case part 23, while realizing a compact layout of the whole of an engine 1, an intake air introducing duct 31 and an intake air deriving duct 32, by putting the turbine case part 23 and a compressor part 24 of an exhaust supercharger 22 in the positional relationship advantageous to early activation of a catalyst when beginning starting of the engine 1, in the engine 1 with a supercharger transversely installed and mounted in an engine room of a vehicle front part and connecting the exhaust supercharger 22 to the vehicle rear side via an exhaust manifold 21. <P>SOLUTION: The exhaust supercharger 22 is arranged so that the turbine case part 23 is positioned on the vehicle central side more than the compressor case part 24 in the vehicle width direction. The metallic intake deriving duct 32 is arranged to pass through between the intake introducing duct 31 and the turbine case part 23 on the upper side of the turbine case part 23. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to a technical field related to a supercharged engine mounted horizontally in an engine room in a front portion of a vehicle.

  2. Description of the Related Art Conventionally, an engine in which each cylinder is horizontally installed in an engine room at the front of the vehicle so that the cylinders are aligned in the vehicle width direction is well known, and such an engine is usually exhausted rearward (for example, Patent Document 1). That is, an exhaust port is opened on the surface of the engine cylinder head on the rear side of the vehicle, and an exhaust manifold connected to the exhaust port is provided, and exhaust is performed from the exhaust manifold through an exhaust pipe extending rearward of the vehicle.

  In the engine as described above, when an exhaust supercharger that compresses the intake air by the exhaust flow from the exhaust manifold is provided, the exhaust supercharger is It is provided between the exhaust manifold and the exhaust pipe, and the turbine case portion and the compressor case portion of the exhaust supercharger are arranged in the vehicle width direction on the vehicle rear side of the exhaust manifold.

Here, the exhaust gas supercharger disclosed in Patent Document 1 is disposed such that the compressor case portion is positioned closer to the vehicle center side than the turbine case portion in the vehicle width direction. The exhaust pipe has a flexible tube disposed in the center in the vehicle width direction, and a connecting pipe part that connects the flexible tube and the turbine case part. The connecting pipe part is connected to the turbine case part. After extending to the vehicle width direction center through the lower side of the exhaust supercharger, it is connected to the flexible tube. Further, an exhaust purification device having a catalyst member or the like is disposed in a portion of the exhaust pipe located below the vehicle floor.
JP-A-2005-320907

  However, in the arrangement in which the compressor case portion of the exhaust turbocharger is located closer to the center in the vehicle width direction than the turbine case portion as in Patent Document 1, the turbine case portion is far from the center in the vehicle width direction. As a result, the length of the connecting pipe portion becomes long. For this reason, the length of the exhaust pipe from the turbine case portion to the exhaust purification device also becomes longer, and the exhaust gas temperature in the exhaust purification device is lowered by that amount, thereby enabling early activation of the catalyst at the start of engine start. Disadvantageous.

  On the other hand, it is conceivable to arrange the exhaust purification device in the vicinity of the exhaust supercharger in the engine room. However, due to the relationship between the size of the exhaust purification device (purification performance) and the space in the engine room, It is not always easy to arrange the exhaust purification device at the position. In particular, in a diesel engine, in order to provide a particulate filter member in addition to a catalyst member in the exhaust purification device, the exhaust purification device becomes large and it is difficult to dispose the exhaust purification device in the vicinity of the exhaust supercharger. is there.

  Therefore, the positional relationship between the turbine case portion and the compressor case portion of the exhaust supercharger is reversed from that of Patent Document 1, and the turbine case portion is arranged closer to the center in the vehicle width direction than the compressor case portion. It is possible. In this way, the length of the connecting pipe portion is shortened by substantially the same length as the length of the exhaust supercharger in the vehicle width direction, which is advantageous for early activation of the catalyst at the start of engine start.

  However, if the turbine case portion is arranged closer to the center in the vehicle width direction than the compressor case portion, the following problem occurs. That is, the compressor case portion is connected with an intake air introduction duct for introducing intake air into the compressor case portion and an intake air extraction duct for deriving intake air compressed by the compressor case portion. The intake intake duct is made of resin from the viewpoint of cost reduction and the intake lead duct is made of metal for reasons such as the pressure and temperature of the intake air becoming high. These two ducts do not straddle the upper side of the engine so that the total space including the engine is as small as possible, but on the side of the transmission side of the engine (the upper side of the transmission with a low height). It extends from the vehicle front side of the engine to the vehicle rear side. Here, since the compressor case portion is positioned on the opposite side of the transmission, both ducts are connected to the compressor case portion through the upper side of the exhaust supercharger on the vehicle rear side of the engine. . In this case, particularly on the upper side of the turbine case portion, the resin intake duct is easily affected by the radiant heat from the turbine case portion, and is easily damaged by the radiant heat.

  The present invention has been made in view of such various points, and an object of the present invention is to provide a turbine case portion and a compressor case portion of an exhaust supercharger in an engine with a horizontal supercharger as described above. In addition to providing an advantageous positional relationship for the early activation of the catalyst at the start of engine startup, while realizing a compact layout of the engine, the intake intake duct and the intake intake duct as a whole, the resin intake intake duct is connected to the turbine case section. It is to avoid being affected by radiant heat from.

  In order to achieve the above object, according to the present invention, the exhaust supercharger is disposed such that the turbine case portion is positioned closer to the vehicle center side than the compressor case portion in the vehicle width direction, and the resin intake air introduction is performed. The duct was disposed so as to pass through the upper side of the turbine case portion, and the metal intake lead-out duct was disposed so as to pass between the intake intake duct and the turbine case portion on the upper side of the turbine case portion.

  Specifically, in the first aspect of the invention, the cylinders are horizontally mounted in the engine room at the front of the vehicle so as to be aligned in the vehicle width direction, and the exhaust supercharger is provided on the rear side of the vehicle via the exhaust manifold. For connected turbocharged engines.

  The exhaust supercharger is disposed such that the turbine case portion is positioned closer to the vehicle center than the compressor case portion in the vehicle width direction, and intake air is introduced into the compressor case portion in the compressor case portion. A resin-made air intake duct for connecting the introduced intake air from the compressor case part, and the air intake duct is connected to an upper side of the turbine case part. It is assumed that the intake lead-out duct is disposed so as to pass between the intake intake duct and the turbine case part above the turbine case part.

  With the above configuration, the turbine case portion of the exhaust supercharger is disposed closer to the center in the vehicle width direction than the compressor case portion, so the compressor case portion is disposed closer to the vehicle width direction center than the turbine case portion. Compared to the case, the length of the exhaust pipe from the turbine case portion to the exhaust purification device provided under the vehicle floor or the like is shortened, which is advantageous for early activation of the catalyst when starting the engine. In addition, the intake air intake duct and the intake air exhaust duct pass through the upper side of the exhaust supercharger, so that they can extend to the front and rear of the vehicle through the side of the transmission side of the engine. A compact layout of the entire outlet duct can be realized. Moreover, since the intake lead-out duct passes between the intake lead-in duct and the turbine case part on the upper side of the turbine case portion, the intake lead-in duct is made of metal by the influence of the radiant heat from the turbine case portion. Can be protected from being affected. As a result, the intake intake duct can be prevented from being damaged.

  According to a second aspect of the present invention, in the first aspect of the present invention, an exhaust pipe extending rearward of the vehicle and passing under the vehicle floor is connected to the turbine case portion, and an exhaust gas purification is provided at a portion of the exhaust pipe located below the vehicle floor. Assume that a device is provided.

  As a result, even if the exhaust purification device is a large one having sufficient purification performance, there is no problem in space in the engine room. And even if the exhaust purification device is provided under the vehicle floor in this way, in the present invention, the length of the exhaust pipe from the turbine case part to the exhaust purification device can be shortened. Can be activated early.

  According to a third aspect of the present invention, in the second aspect of the present invention, the engine is a diesel engine, and the exhaust purification device includes a catalyst member and a particulate filter member.

  Such an exhaust purification device is considerably large, but in the present invention, the exhaust purification device can be easily arranged without increasing the engine room, and the catalyst is activated early when the engine starts. It becomes possible to become. Therefore, the present invention is suitable for a diesel engine.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the intake air introduction duct is disposed at a height position below the upper end of the engine on the upper side of the turbine case portion.

  In other words, if the intake intake duct is disposed at an upper position as far as possible from the turbine case portion on the rear side of the vehicle of the engine, it is possible to prevent the intake intake duct from being affected by the radiant heat from the turbine case portion. Although it is possible, if the intake intake duct is disposed at a height above the upper end of the engine, it is difficult to achieve a compact layout of the engine, the intake intake duct, and the intake outlet duct as a whole. However, in the present invention, the intake intake duct is arranged at a height position below the upper end of the engine (the intake derivation duct is also arranged at a height position below the upper end of the engine), so that the engine, the intake introduction duct, and the intake air A compact layout of the entire lead-out duct can be realized, and the intake lead-out duct can protect the intake lead-in duct from being affected by radiant heat from the turbine case portion.

  As described above, according to the turbocharged engine of the present invention, the exhaust supercharger is disposed such that the turbine case portion is located closer to the vehicle center side than the compressor case portion in the vehicle width direction, and the resin The intake intake duct made of metal is arranged so as to pass through the upper side of the turbine case part, and the intake pipe made of metal is arranged so as to pass between the intake air introduction duct and the turbine case part on the upper side of the turbine case part. As a result, the catalyst can be activated quickly at the start of engine start, and the intake induction duct can be reduced by the intake induction duct while realizing a compact layout of the entire engine, intake induction duct and intake extraction duct. Further, it can be protected from being affected by the radiant heat from the turbine case portion.

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

  1 and 2 show a supercharged engine 1 according to an embodiment of the present invention. FIG. 1 is a view seen from the rear side of the vehicle, and FIG. 2 is a transmission side of the engine 1 (the left side of the vehicle). It is the figure seen from.

  In the present embodiment, the engine 1 is a four-cylinder in-line diesel engine in which four cylinders (not shown) are arranged in series, and the cylinders are arranged in the vehicle width direction in the engine room at the front of the vehicle. It is mounted horizontally. The engine 1 is disposed on the right side of the vehicle with respect to the center in the vehicle width direction (line C shown in FIG. 1). A transmission (not shown) is disposed on the left side of the engine 1 in the vehicle. In FIGS. 1 and 2, 2 is a head cover, 3 is a cylinder head, 4 is a cylinder block, 4a is a transmission coupling portion in the cylinder block 4, 5 is a lower block, 6 is an oil pan, 7 is a timing case, and 8 is A timing cover, 9 is a crank pulley, 10 is an oil filter, 11 is a crankshaft, and 12 is a supply pump for supplying fuel to the fuel injection valve.

  Although not shown in the drawing, the surface of the cylinder head 3 of the engine 1 on the front side of the vehicle has four intake ports communicating with the cylinders, and intake manifolds connected to all the intake ports. It is fixed. On the other hand, four exhaust ports (not shown) communicating with the respective cylinders are opened on the surface of the cylinder head 3 on the rear side of the vehicle, and an exhaust manifold 21 connected to all the exhaust ports is attached with bolts. It is fixed. The exhaust manifold 21 is provided with a connecting portion 21a to which an exhaust supercharger 22 is connected. The exhaust supercharger 22 is connected to the connecting portion 21a. That is, the exhaust supercharger 22 is connected to the rear side of the engine 1 via the exhaust manifold 21. As a result, burned gas is discharged from the combustion chamber in each cylinder to the exhaust manifold 21 via the exhaust port, and the exhaust gas from the exhaust manifold 21 is discharged into the exhaust supercharger 22 (in a turbine case portion 23 described later). Led to. The exhaust gas that has passed through the exhaust supercharger 22 is discharged into the atmosphere from the rear end of the vehicle via an exhaust pipe 41 described later.

  The exhaust supercharger 22 has an upper portion attached to the exhaust manifold 21 and a lower portion attached to the cylinder block 4 via a bracket 28 and fixed thereto. The exhaust supercharger 22 has a turbine case portion 23 for accommodating a turbine (turbine wheel) and a compressor case portion 24 for accommodating a compressor (compressor impeller). The two case portions 23 and 24 are mutually connected. It is integrally formed. The connection portion 21 a of the exhaust manifold 21 is connected to the upper surface of the turbine case portion 23, and exhaust gas from the exhaust manifold 21 is introduced into the turbine case portion 23. The turbine wheel is driven by the exhaust flow, and the compressor impeller rotates integrally with the turbine wheel to compress the intake air. The exhaust supercharger 22 is provided with a waste gate valve 25 for preventing the supercharging pressure from exceeding a certain pressure.

  The turbine case portion 23 and the compressor case portion 24 are arranged in the vehicle width direction, and the turbine case portion 23 is disposed at a position close to the vehicle width direction center, that is, on the vehicle width direction center side (transmission side). The compressor case portion 24 is disposed at a position far from the center in the vehicle width direction, that is, at a position on the outer side in the vehicle width direction (the side opposite to the transmission). Thereby, the turbine case part 23 is located in the vehicle center side rather than the compressor case part 24 in the vehicle width direction.

  The compressor case portion 24 includes a resin-made intake introduction duct 31 for introducing intake air into the compressor case portion 24, and a metal made for extracting the introduced intake air from the compressor case portion 24. Are connected to the intake lead-out duct 32. The intake intake duct 31 and the intake outlet duct 32 constitute an intake duct for introducing intake air into the combustion chamber in each cylinder.

  The air intake duct 31 extends from an air cleaner (not shown) provided on the vehicle front side of the engine 1 in the engine room to a position on the vehicle left side of the engine 1 and on the transmission upper side to the vehicle rear side of the engine 1. After extending through the turbine case portion 23 and the compressor case portion 24 of the exhaust supercharger 22 to the right side of the compressor case portion 24 in the vehicle, it is lowered to substantially the same height as the compressor case portion 24. Then, the vehicle is curved to the left side of the vehicle and connected to the side surface of the compressor case portion 24 on the right side of the vehicle. As a result, the intake duct 31 is curved in a substantially U-shape (a shape in which the U-shape is horizontal) when viewed from the vehicle rear side in the vicinity of the compressor case portion 24. The intake air intake duct 31 is arranged at a height position below the upper end of the engine 1 on the left side of the engine 1 and on the upper side of the turbine case 23 and the compressor case 24.

  On the other hand, the intake lead-out duct 32 passes from the intercooler (not shown) provided on the front side of the engine 1 in the engine room to the left side of the engine 1 and through the upper side of the transmission. After that, after extending to the upper position of the compressor case part 24 through the upper side of the turbine case part 23 of the exhaust supercharger 22, it is lowered and connected to the upper surface of the compressor case part 24. The intake derivation duct 32 is located below the intake derivation duct 31 on the left side of the vehicle of the engine 1 and on the upper side of the turbine case 23 and the compressor case 24. As a result, the intake lead-out duct 32 is disposed on the upper side of the turbine case portion 23 so as to pass between the intake introduction duct 31 and the turbine case portion 23.

  When the turbine wheel of the exhaust supercharger 22 is driven by the exhaust flow from the exhaust manifold 21 as described above, the compressor impeller rotates with the turbine wheel, and the compressor impeller causes the compressor case from the intake introduction duct 31. The intake air introduced into the portion 24 is compressed. The compressed intake air is pumped to the intake manifold via the intercooler by the intake lead-out duct 32 and is introduced into the combustion chamber in each cylinder from the intake port. On the other hand, the exhaust gas introduced into the turbine case portion 23 is discharged to the exhaust pipe 41 connected to the side surface of the turbine case portion 23 on the vehicle left side (side closer to the center in the vehicle width direction).

  The exhaust pipe 41 extends slightly from the left side surface of the turbine case portion 23 to the left side of the vehicle, and then extends so as to incline downward toward the rear side of the vehicle at the center in the vehicle width direction to the vehicle floor. It dives and extends under the vehicle floor to the rear end of the vehicle. The exhaust pipe 41 is located on the upstream side and is connected to the turbine case part 23. The exhaust exhaust pipe part 43 is connected to the upstream exhaust pipe part 43 and is located below the vehicle floor. 2) and a downstream exhaust pipe section (not shown) connected to the exhaust purification device 51 and located on the downstream side.

  The upstream exhaust pipe portion 43 is configured from the upstream side in the order of the connecting pipe portion 44, the flexible tube 45, and the spherical joint 46, and the exhaust gas discharged from the turbine case portion 23 is downstream. It leads to the exhaust purification device 51 on the side. In FIG. 1, only the connecting pipe portion 44 and the flexible tube 45 in the upstream exhaust pipe portion 43 are shown.

  The flexible tube 45 is composed of a tube that can be bent in conformity to expansion and contraction in the tube axis direction, lateral displacement, bending displacement, and the like, and a conventionally known tube is employed. And this flexible tube 45 is arrange | positioned so that the tube axis may incline below toward the vehicle rear (downstream side) in the vehicle width direction approximate center. A downstream end 45a is formed at the downstream end of the flexible tube 45, and an upstream joint half 81 constituting the spherical joint 46 is integrated with the downstream end of the downstream tube 45a. Is formed.

  As shown in FIG. 3, the spherical joint 46 includes an upstream joint half 81 and a downstream joint half 82.

  The upstream joint half 81 includes a flange 81a formed on the outer peripheral surface of the downstream pipe portion 45a of the flexible tube 45, and a gasket 81b disposed on the downstream side of the flange 81a. The flange 81a is attached over the entire circumference of the outer peripheral surface of the downstream pipe portion 45a, and is arranged so that the flange surface is orthogonal to the tube axis. Furthermore, two bolt holes 81d and 81d through which a bolt 83 (to be described later) is inserted are formed in the flange 81a with the tube shaft interposed therebetween. The gasket 81b is an annular body having a substantially triangular cross-sectional shape, and includes a flat flange contact surface that contacts the flange 81a, an annular tube contact surface that contacts the outer peripheral surface of the downstream tube portion 45a, and the like. Are formed by a partially spherical sliding contact convex surface 81c that forms a substantially triangular cross section.

  On the other hand, the downstream joint half 82 is formed integrally with the upstream pipe portion 51a formed at the upstream end of the exhaust gas purification device 51, and has a partially spherical sliding contact concave surface 82a. Consists of a concave surface 82a and a continuous flange portion 82b. The sliding contact surface 82a is formed on the outer peripheral surface of the upstream side pipe portion 51a so as to surround the upstream opening end and project upstream from the upstream opening end, and has a partial spherical shape opening to the upstream side. . Further, the flange portion 82b is continuously formed on the upstream peripheral portion of the sliding contact concave surface 82a, and the flange portion 82b extends from the upstream peripheral portion in the radial direction of the upstream pipe portion 51a. In addition, two bolt holes 82c and 82c are formed in the flange portion 82b at positions where they are coaxial with the two bolt holes 81d and 81d when connected to the upstream joint half 81 with the tube shaft interposed therebetween. Has been.

  The upstream joint half 81 and the downstream joint half 82 abut the sliding contact convex surface 81c and the sliding contact concave surface 82a, and connect the flange 81a and the flange portion 82b to the bolts 83, 83 and The spherical joint 46 is configured by elastically connecting the nuts 84 and 84 with the springs 85 and 85. Thus, the downstream pipe portion 45a of the flexible tube 45 and the upstream pipe portion 51a of the exhaust gas purification device 51 are connected in an airtight manner by the flange 81a, the flange portion 82b, and the gasket 81b, and are in sliding contact with the sliding contact convex surface 81c. Since the concave surface 82a is elastically connected, the concave surface 82a is slidable along the partial spherical shape and can be relatively rotationally displaced. The spherical joint 46 is inclined so that its axis is inclined downward toward the rear (downstream side) of the vehicle at the approximate center in the vehicle width direction.

  The exhaust purification device 51 is located at the center in the vehicle width direction, and is a catalyst member that can purify harmful components (HC, CO, NOx) in exhaust gas, and a particulate filter that collects soot in the exhaust gas. Member.

  The catalyst member functions to oxidize HC (unburned fuel component) and CO in the exhaust gas, and a noble metal catalyst (for example, Pt and Pd are supported on γ-alumina on a honeycomb-shaped cordierite support. All the cells of the carrier are open at both ends. The catalyst member is disposed on the upstream side of the particulate filter member.

  The particulate filter member is a honeycomb wall flow type made of cordierite, and the end faces of the cells constituting the filter are alternately sealed. The particulate filter member is coated with an oxidation catalyst. The catalyst member carrier and the particulate filter member are not limited to the above configuration.

  In the present embodiment, since the exhaust purification device 51 has a catalyst member and a particulate filter member and is quite large, the exhaust purification device 51 is disposed in the vicinity of the exhaust supercharger 22 in the engine room, That is, it is difficult to arrange in the space between the dash panel 61 (see FIG. 2) and the exhaust supercharger 22, and as described above, it is arranged under the vehicle floor.

  When the exhaust purification device 51 is thus arranged under the vehicle floor, the length from the turbine case portion 22 to the exhaust purification device 51 in the exhaust pipe 41 in order to achieve early activation of the catalyst at the start of the engine 1, That is, it is necessary to shorten the length of the upstream exhaust pipe portion 43 of the exhaust pipe 41 as much as possible.

  Therefore, in the present embodiment, the exhaust supercharger 22 is disposed so that the turbine case portion 23 is located closer to the center in the vehicle width direction than the compressor case portion 24. That is, when the compressor case portion 24 is arranged closer to the center in the vehicle width direction than the turbine case portion 23, the turbine case portion 23 is farther from the center in the vehicle width direction. Length becomes long. However, since the turbine case portion 23 is arranged closer to the vehicle center side than the compressor case portion 24 and the turbine case portion 23 is brought closer to the center in the vehicle width direction as in the present embodiment, the compressor case portion 24 is connected to the turbine case. Compared with the case where it is arranged closer to the center in the vehicle width direction than the portion 23, the length of the connecting pipe portion 44 can be shortened by substantially the same length as the length of the exhaust supercharger 22 in the vehicle width direction. The length of the upstream exhaust pipe 43 can be shortened.

  Here, in the present embodiment, in order to realize a compact layout of the engine 1, the intake inlet duct 31 and the intake outlet duct 32 as a whole, the ducts 31 and 32 are connected to the transmission side of the engine 1 (the vehicle left side) as described above. ) Side (the upper side of the transmission having a low height), and extends from the vehicle front side of the engine 1 to the vehicle rear side, and then extends in the vehicle width direction on the vehicle rear side of the engine 1. Further, both ducts 31 and 32 are disposed at a height position below the upper end of the engine 1. And if the turbine case part 23 is arrange | positioned in the vehicle width direction center side rather than the compressor case part 24 as mentioned above, since the compressor case part 24 will be located in the opposite side to a transmission, both ducts 31 and 32 are On the vehicle rear side of the engine 1, the engine 1 is connected to the compressor case portion 24 through the upper side of the exhaust supercharger 22. In this case, particularly on the upper side of the turbine case portion 23, the resin-made intake introduction duct 31 is easily affected by the radiant heat from the turbine case portion 23, and the intake heat introduction duct 31 is easily damaged by the radiant heat.

  However, in the present embodiment, the intake lead duct 32 made of metal is disposed on the upper side of the turbine case portion 23 so as to pass between the intake introduction duct 31 and the turbine case portion 23. 32 can protect the intake air intake duct 31 from being affected by the radiant heat, and as a result, the intake air intake duct 31 can be prevented from being damaged.

  In addition, since the intake intake duct 31 and the intake lead-out duct 32 are arranged at a height position below the upper end of the engine 1, the engine 1 and both the ducts 31 and 32 as a whole can have a compact layout. Since the intake intake duct 31 cannot be largely separated from the turbine case part 23 on the upper side of the turbine case part 23 because the air intake duct 31 is arranged at a high position, as described above, the intake lead-out duct 32 is connected to the turbine case part. Since the air intake duct 31 is located between the air intake introduction duct 31 and the turbine case portion 23 on the upper side of the air intake passage 23, even if the air intake introduction duct 31 is not greatly separated from the turbine case portion 23, the air intake introduction duct 31 is connected to the turbine case portion 23. It can protect so that it may not be influenced by the radiant heat from.

  In addition, although the case where the engine 1 was a diesel engine was described in the said embodiment, this invention is applicable even if it is a gasoline engine.

  Further, in the above embodiment, the exhaust purification device 51 is provided in a portion of the exhaust pipe 41 located below the vehicle floor. However, the exhaust purification device 51 may be disposed at any position of the exhaust pipe 41. The effect of this invention is exhibited more effectively, so that the purification apparatus 51 is located downstream.

  INDUSTRIAL APPLICABILITY The present invention is useful for an engine with a supercharger that is installed horizontally in an engine room in front of a vehicle, and particularly useful for a diesel engine.

It is the figure seen from the vehicle rear side which shows the engine with a supercharger which concerns on embodiment of this invention. It is the figure seen from the transmission side (vehicle left side) of the said engine. It is sectional drawing of a spherical joint.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine 21 with a supercharger Exhaust manifold 22 Exhaust supercharger 23 Turbine case part 24 Compressor case part 31 Intake introduction duct 32 Intake extraction duct 41 Exhaust pipe 51 Exhaust purification device

Claims (4)

A turbocharged engine in which the cylinders are horizontally mounted in the engine room at the front of the vehicle so as to be aligned in the vehicle width direction, and an exhaust supercharger is connected to the rear side of the vehicle via an exhaust manifold,
The exhaust supercharger is disposed so that the turbine case portion is positioned closer to the vehicle center than the compressor case portion in the vehicle width direction,
The compressor case section includes a resin-made intake introduction duct for introducing intake air into the compressor case section, and a metal intake lead-out duct for extracting the introduced intake air from the compressor case section. Is connected,
The intake intake duct is disposed so as to pass above the turbine case portion,
The engine with a supercharger, wherein the intake lead-out duct is disposed on the upper side of the turbine case portion so as to pass between the intake introduction duct and the turbine case portion. The supercharged engine according to claim 1,
An exhaust pipe extending rearward of the vehicle and passing under the vehicle floor is connected to the turbine case portion,
An engine with a supercharger, wherein an exhaust gas purification device is provided in a portion of the exhaust pipe located below the vehicle floor. The engine with a supercharger according to claim 2,
The engine is a diesel engine,
The exhaust emission control device includes a catalyst member and a particulate filter member. In the engine with a supercharger as described in any one of Claims 1-3,
The turbocharged engine, wherein the intake duct is disposed at a height position below the upper end of the engine above the turbine case portion.

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