JP2009051303A - Powertrain arranging structure for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve steering stability and properly control a temperature of an exhaust system auxiliary machine by arranging a powertrain on a back side of a vehicle. <P>SOLUTION: In a vehicle, a recessed portion 5 recessed on a back side of a vehicle body is provided to a dash panel 3 blocking a compartment 1 from an engine room 2, and one part of a powertrain 11 driving wheels is arranged in the recessed portion 5. A heat exchanger 16 for cooling a powertrain and cooling fans 17, 18 for cooling the heat exchanger 16 are provided in front of the powertrain 11, and an extension part 27 of an exhaust pipe 24 connected to the powertrain 11 is provided between the cooling fans 17, 18 and the heat exchanger 16. An exhaust system auxiliary machine 23 is provided to the extension part 27 of the exhaust pipe 24. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a vehicle in which a dash panel that partitions a vehicle compartment and an engine room is provided with a recessed portion that is recessed into the rear side of the vehicle body, and a part of a power train that drives a wheel is disposed in the recessed portion. This relates to a powertrain arrangement structure.

Conventionally, as shown in Patent Document 1 below, a vehicle compartment and an engine room partitioned by a dash panel are provided in front of the vehicle compartment, and the rear is driven by a power train having an engine body and the like disposed in the engine room. In a rear-wheel drive vehicle configured to drive wheels, as shown in FIG. 7, an exhaust pipe 24 of the engine body 12 is installed so as to extend rearward through the front of the power train 11. An upstream side catalyzer (catalyst) 23 for purifying exhaust gas is provided in the upstream part of the pipe 24 and disposed on the front side of the power train 11, and has a radiator and a cooling fan on the front side thereof. The heat exchanger (cooling unit) 18 of the exhaust pipe 24 is disposed downstream of the exhaust pipe 24 introduced into the tunnel portion 6 on the passenger compartment floor. It has been practiced to disposed a downstream catalyzer α for exhaust gas purification in part) 28.
JP 2003-326981 A

  As disclosed in Patent Document 1 above, an exhaust system auxiliary machine 23 composed of an upstream catalyst for exhaust gas purification provided in an exhaust pipe 24 of the engine body 12 is disposed in the vehicle width direction on the front side of the power train 11. Since the power train 11 can be positioned on the rear side of the vehicle body as compared with the case where the exhaust system auxiliary device 23 is disposed on the rear side of the power train 11. It is possible to improve the steering stability by reducing the yaw moment of inertia during running. However, when the exhaust system auxiliary machine 23 is disposed between the heat exchanger 16 made of a radiator or the like and the power train 11 as described above, the exhaust pipe 24 is introduced into a limited space in the engine room. Thus, since it is necessary to install the exhaust system auxiliary machine 23, the degree of freedom in layout is limited, and it is difficult to maintain the temperature of the exhaust system auxiliary machine 23 at an appropriate value, and in the engine room. There is a problem that it is unavoidable that other devices and the like arranged in the above are affected by the heat of the exhaust system auxiliary machine 23.

  The present invention has been made in view of the above problems, and it is possible to improve the steering stability by arranging a power train on the rear side of the vehicle and to appropriately control the temperature of the exhaust system auxiliary equipment. An object of the present invention is to provide a vehicle powertrain arrangement structure that can prevent the thermal effect from affecting other devices.

  In the invention according to claim 1, a dash panel that partitions the vehicle compartment and the engine room is provided with a recessed portion that is recessed into the rear side of the vehicle body, and a part of the power train that drives the wheels is provided in the recessed portion. In the vehicle in which is disposed, a heat exchanger for cooling the power train and a cooling fan for cooling the heat exchanger are disposed in front of the power train, and between the cooling fan and the heat exchanger. An exhaust pipe extension connected to the power train is disposed, and an exhaust system auxiliary machine is provided on the exhaust pipe extension.

  According to a second aspect of the present invention, in the vehicle powertrain arrangement structure according to the first aspect, the extension portion of the exhaust pipe is disposed between the heat exchanger and the cooling fan and extends in the vertical direction. The exhaust system auxiliary machine is provided in the longitudinally extending portion of the exhaust pipe and is arranged so as to extend in the vertical direction.

  According to a third aspect of the present invention, in the vehicle powertrain arrangement structure according to the first or second aspect, the cooling fan is disposed in an inclined state so as to be directed to the installation portion of the exhaust system auxiliary machine. Is.

  The invention according to claim 4 is the vehicle powertrain arrangement structure according to any one of claims 1 to 5, wherein the vehicle has a plurality of cooling fans, at least one of which is an exhaust system auxiliary machine. It is arrange | positioned so that it may point in the installation part.

  According to a fifth aspect of the present invention, in the vehicle powertrain arrangement structure according to the fourth aspect, the plurality of cooling fans are arranged so as to surround the exhaust system auxiliary machine.

  The invention according to claim 6 is the vehicle powertrain arrangement structure according to any one of claims 1 to 5, wherein the powertrain is arranged vertically in an engine room. And a transmission connected to the rear thereof.

  According to a seventh aspect of the present invention, in the vehicle powertrain arrangement structure according to any one of the first to sixth aspects, the exhaust system auxiliary machine comprises a catalyst for purifying exhaust gas.

  In the invention according to claim 1, the exhaust system auxiliary equipment including the exhaust gas purifying catalyzer is disposed on the front side of the power train, and a part of the power train is disposed in the dash panel recess. Thus, since the power train, which is a heavy article arranged vertically in the engine room, can be arranged as far as possible on the rear side of the vehicle, the center of gravity of the vehicle is placed on the center side of the vehicle body. Therefore, the yaw moment of inertia acting when the vehicle is traveling can be effectively reduced and the steering stability can be improved. In addition, the exhaust system auxiliary machine is disposed between the cooling fan and the heat exchanger, and the cooling fan and the heat exchanger cover the installation part of the exhaust system auxiliary machine from the front and rear. It is possible to effectively prevent other equipment and the like disposed on the exhaust system from being affected by the heat of the exhaust system auxiliary equipment, and it is possible to cool the exhaust system auxiliary equipment by the cooling fan. Even when the amount of travel air introduced into the engine room from a part or the like is small, the exhaust system auxiliary equipment is effectively prevented from prematurely deteriorating due to excessive heating according to the reaction heat, and There is an advantage that it is possible to effectively prevent the exhaust gas purifying function from being impaired due to the temperature of the exhaust system auxiliary equipment exceeding an appropriate value.

  In the invention according to claim 2, the exhaust pipe extension is disposed so as to extend in the longitudinal direction between the heat exchanger and the cooling fan, and the exhaust system auxiliary machine is provided along the extension of the exhaust pipe. Is arranged so as to extend in the vertical direction, so that even when the arrangement space in the vehicle width direction is limited, a large exhaust system auxiliary machine can be arranged between the heat exchanger and the cooling fan, and the cooling fan There is an advantage that the exhaust system auxiliary equipment can be effectively cooled to prevent its thermal deterioration.

  In the invention according to claim 3, since the cooling fan is installed in an inclined state so as to face the installation part of the exhaust system auxiliary machine, the exhaust system auxiliary machine can be efficiently cooled by the cooling fan, Even when the installation size of the cooling fan is limited, there is an advantage that a sufficient amount of cooling air can be supplied to the installation part of the exhaust system auxiliary equipment with a sufficient width dimension and the like.

  In the invention which concerns on Claim 4, the said exhaust system auxiliary machine is effectively carried out by the cooling fan of the heat exchanger installed in the state inclined toward the installation part of an exhaust system auxiliary machine among several cooling fans. Since it can be cooled, there is an advantage that it is possible to effectively prevent the exhaust system auxiliary equipment from being quickly thermally deteriorated or the exhaust gas purification function being impaired.

  In the invention according to claim 5, since the plurality of cooling fans are disposed so as to surround the exhaust system auxiliary machine, the influence of the heat generated in the exhaust system auxiliary machine reaches other equipment and the like. There is an advantage that it can be effectively blocked by the exchanger and the plurality of cooling fans, and the exhaust system auxiliary equipment is simultaneously cooled by the plurality of cooling fans to effectively prevent the thermal deterioration and the like.

  In the invention according to claim 6, since the power train having the engine main body and the transmission, which are heavy objects arranged vertically in the engine room, can be arranged on the rear side of the vehicle as much as possible, By positioning the center of gravity of the vehicle on the center side of the vehicle body, it is possible to effectively reduce the yaw moment of inertia that acts when the vehicle is traveling and to improve the steering stability.

  In the invention according to claim 7, an exhaust system supplement comprising a heat exchanger for cooling the power train disposed in front of the power train and a catalyzer for purifying exhaust gas between the cooling fan for cooling the heat exchanger. The exhaust gas purification catalyzer is excessively heated by its reaction heat, etc., by cooling the exhaust system auxiliary equipment according to the cooling air supplied from the cooling fan of the heat exchanger. It is possible to prevent heat deterioration early and effectively prevent the exhaust gas purification performance from being deteriorated by being heated to a temperature higher than the appropriate reaction temperature, and the reaction heat generated in the exhaust gas purification catalyzer. There is an advantage that it is possible to effectively prevent the battery from reaching other devices or the like disposed in the engine room.

  1 to 4 show a first embodiment of a vehicle powertrain arrangement structure according to the present invention. The vehicle is provided with a dash panel 3 that partitions the compartment 1 and the engine room 2, and a front end portion of the floor panel 4 is connected to a lower end portion of the dash panel 3. The dash panel 3 is formed with a recessed portion 5 that is recessed in the rear side of the vehicle body at the vehicle width direction center portion, and bulges upward in the vehicle width direction center portion of the floor panel 4. A tunnel portion 6 is formed, and passenger seats 7 including a driver seat and a passenger seat are disposed on the left and right sides of the tunnel portion 6.

  A bonnet 8 is installed on the upper surface of the engine room 2 so as to be openable and closable. Below the front end of the bonnet 8, a front grill 9 having an opening for running wind intake is disposed. A bumper reinforcement 10 is installed behind the front grille 9 so as to extend in the vehicle width direction, and a pair of left and right front side frames 20 are arranged at the left and right ends so as to extend to the rear side of the vehicle body. It is installed. A power train 11 for driving rear wheels (not shown) is disposed at the rear of the engine room 2. The power train 11 has an engine main body 12 composed of a rotary engine or the like arranged in a vertical manner, and a transmission 13 connected to the rear thereof.

  The rear portion of the engine body 12 is disposed in a recessed portion 5 formed in the dash panel 3, and the transmission 13, the propeller shaft 14 connected thereto, and the power plant frame 15 are connected to the tunnel. It is disposed in the part 6. Further, in the front part of the engine room 2, a heat exchanger 16 for cooling the power train made of a radiator and the like, and a pair of left and right cooling fans 17 and 18 for cooling the heat exchanger 16 are disposed. Yes. As shown in FIG. 2, the cooling fans 17, 18 are provided side by side in the vehicle width direction on the rear side of the heat exchanger 16, and are each viewed in a plan view so as to be directed to the center of the back surface of the heat exchanger 16. It is arranged in a state where it is inclined in the shape of a letter C that spreads forward.

  An air intake pipe 22 having an air cleaner 21 is connected to one side of the engine main body 12 and an exhaust pipe 24 having an exhaust system auxiliary machine 23 including an exhaust gas purifying catalyzer is provided below the air intake pipe 22. It is connected. The exhaust pipe 24 includes a front extension 25 extending from one side surface of the engine body 12 toward the front side of the vehicle body, and a first side extending from the front end portion toward the other side of the engine body 12 in the vehicle width direction. A laterally extending portion 26, a longitudinally extending portion 27 extending in the vertical direction at the side end portion thereof, and a first extending in the vehicle width direction from the lower end portion of the longitudinally extending portion 27 toward one side portion of the engine body 12. 2 side extension part 28, and the back extension part 29 extended from the side edge part of this 2nd side extension part 28 to the back side of a vehicle body.

  The longitudinal extension 27 of the exhaust pipe 24 is disposed between the heat exchanger 16 for cooling the power train and the cooling fans 17 and 18. The exhaust system auxiliary 23 is provided in the longitudinally extending portion 27 of the exhaust pipe 24 so that the exhaust system auxiliary 23 passes between the heat exchanger 16 and the cooling fans 17 and 18 in the vehicle body. It is arrange | positioned so that it may extend in the up-down direction. The rear portion of the rear extension 29 is disposed so as to extend to the rear end side of the vehicle body through the tunnel portion 6 of the passenger compartment floor.

  In FIG. 1, reference numeral 30 is a temperature sensor that detects the coolant temperature of the engine, and reference numeral 31 detects whether or not the powertrain 11 is in a warm-up completion state according to the output signal of the temperature sensor 30. Reference numeral 32 denotes a cooling fan control means for outputting an operation command signal to the cooling fan 17 in response to a detection signal from the warm-up completion detection means 31. In FIG. 2, reference numeral 33 denotes an in-vehicle battery, and in FIG. 3, reference numeral 34 denotes a suspension cross member to which a front wheel suspension arm or the like is attached.

  In the above configuration, when the warm-up completion detection unit 31 confirms that the powertrain 11 is in the warm-up completion state according to the detection signal of the temperature sensor 30, the output signal of the warm-up completion detection unit 31 In response, a control signal for operating the cooling fans 17 and 18 of the heat exchanger 16 is output from the cooling fan control means 32 to the drive unit of the cooling fans 17 and 18. In response to this, as shown in FIG. 2, the cooling air R of the cooling fans 17 and 18 is blown to the front side of the vehicle body, whereby the installation part of the exhaust system auxiliary machine 23 installed behind the heat exchanger 16. The cooling air R is blown to the air, and control is performed to suppress an excessive rise in the temperature of the exhaust system auxiliary machine 23 according to the cooling action.

  Further, when the warm-up completion detecting means 31 confirms that the warm-up completion state is not established, that is, the warm-up operation state immediately after the power train 11 is started, according to the detection signal of the temperature sensor 30. In response to the output signal, the cooling fan control means 32 executes a control to turn off the cooling fans 17 and 18. Accordingly, the supply of the cooling air R from the cooling fan 17 to the exhaust system auxiliary machine 23 is stopped, and warming up of the exhaust system auxiliary machine 23 is promoted.

  As described above, the dash panel 3 that partitions the vehicle compartment 1 and the engine room 2 is provided with the recessed portion 5 that is recessed into the rear side of the vehicle body, and a part of the power train 11 that drives the wheel is the recessed portion 5. In the vehicle disposed inside, a heat exchanger 16 for cooling the power train and cooling fans 17 and 18 for cooling the heat exchanger 16 are disposed in front of the power train 11, and the heat A vertical extension 27 of an exhaust pipe 24 connected to the engine body 12 constituting the power train 11 is disposed between the exchanger 16 and the cooling fans 17 and 18, and an exhaust gas is disposed in the vertical extension 27. When the exhaust system auxiliary machine 23 composed of a purification catalyzer or the like is provided, the power train 11 is positioned on the rear side of the vehicle so that the yaw moment of inertia when the vehicle is running It can be effectively reduced.

  That is, an exhaust system auxiliary machine 23 composed of the exhaust gas purifying catalyzer or the like is disposed in the front part of the engine room 2, and the rear part of the engine main body 12 constituting the power train 11 is recessed in the dash panel 3. The engine body 12 and the transmission 13 which are heavy objects arranged vertically in the engine room 2 can be arranged on the rear side of the vehicle as much as possible by arranging them in the entrance 5. Therefore, by positioning the center of gravity of the vehicle on the center portion side of the vehicle body, it is possible to effectively reduce the yaw moment of inertia that acts when the vehicle travels, and to improve steering stability and traveling stability.

  The exhaust system auxiliary machine 23 is disposed between the cooling fans 17 and 18 and the heat exchanger 16, and the installation part of the exhaust system auxiliary machine is installed from the front and rear by the cooling fans 17 and 18 and the heat exchanger 16. Since it is configured to cover, it is possible to effectively prevent the vehicle-mounted battery 33 or alternator (not shown) disposed in the engine room 2 from being affected by the heat of the exhaust system auxiliary machine 23, and the necessity. Accordingly, the exhaust system auxiliary machine 23 can be cooled by the cooling air R supplied from the cooling fans 17 and 18. Therefore, even when the amount of travel air introduced into the engine room 2 from the opening of the front grille 9 is small, the exhaust system auxiliary 23 responds to the reaction while maintaining the heat exchange function of the cooling water in the heat exchanger 16. It is possible to prevent heat deterioration early due to excessive heating according to heat, and to effectively prevent the exhaust gas purifying function from being impaired when the temperature of the exhaust system auxiliary machine 23 becomes higher than an appropriate value. There is an advantage that it can be prevented.

  In particular, in the first embodiment, the vertical extension 27 of the exhaust pipe 24 is disposed between the heat exchanger 16 for cooling the power train and the cooling fans 17 and 18, and the vertical extension 27 is provided in the vertical extension 27. Since the provided exhaust system auxiliary machine 23 is disposed between the heat exchanger 16 and the cooling fans 17 and 18 so as to extend in the vertical direction of the vehicle body, the installation dimension of the exhaust system auxiliary machine 23 in the vehicle width direction is limited. Even in such a case, it is possible to install the exhaust system auxiliary machine 23 composed of a large catalyzer having a large diameter. As shown in FIGS. 7 and 8, the interior of the tunnel portion 6 on the passenger compartment floor or below the floor panel 4 is provided. The downstream side catalyzer α of the conventional example arranged in the above can be reduced in size or omitted. Therefore, without taking measures such as installing a heat insulating member in order to prevent the influence of heat generated in the downstream side catalyzer α from reaching the passenger compartment, the passenger's There is an advantage that it is possible to effectively prevent the foot portion from being heated.

  In addition, as in the conventional example, when the exhaust gas purification downstream catalyzer α is provided in the tunnel portion 6 of the passenger compartment floor, the passenger seat 7 provided in the passenger compartment 1 is provided. It is necessary to avoid interference with the downstream catalyzer α by positioning it to some extent upward. On the other hand, when the downstream side catalyzer α is omitted or downsized, as shown in FIG. 4, the passenger seat 7 can be positioned lower than the conventional one, and the vehicle There are advantages such as being able to reduce the height.

  In the first embodiment, a pair of left and right cooling fans 17 and 18 in the plan view are provided on the rear side of the heat exchanger 16 in the vehicle width direction, and the cooling fans 17 and 18 are respectively connected to the exhaust system auxiliary equipment. Since the exhaust system auxiliary machine 23 is arranged so as to surround the rear surface of the exhaust system auxiliary device 23 by being inclined toward the installation unit 23, each of the above-mentioned each of the above-mentioned components can be used even when the vehicle width dimension is limited. The cooling fans 17 and 18 can be sufficiently large in size to ensure a sufficient amount of cooling air R, and the reaction heat of the exhaust system auxiliary 23 affects the rear side of the engine room 2. This is advantageous in that it can be effectively prevented by the cooling fans 17 and 18.

  When the warm-up completion detecting means 31 confirms that the power train 11 is in the warm-up completion state, the cooling fans 17 and 18 are operated to supply the cooling air R to the installation section of the heat exchanger 16. Therefore, the engine cooling water can be actively exchanged heat, and the cooling air R can be installed in the installation part of the exhaust system auxiliary device 23 disposed on the rear side of the heat exchanger 16. Can be sufficiently supplied to cool the exhaust system auxiliary machine 23 effectively. Therefore, even when the amount of travel air introduced into the engine room 2 from the opening of the front grill 9 is small, the exhaust system auxiliary 23 is heated excessively according to the reaction heat, so that heat is quickly generated. There is an advantage that it can be effectively prevented that the exhaust gas purification function is deteriorated due to deterioration or the temperature becoming higher than an appropriate value.

  In the first embodiment, when it is confirmed in the warm-up completion detection means 31 that the power train 11 is not in the warm-up completion state, that is, in the warm-up operation state immediately after the power train 11 is started, Since the control to maintain the cooling fans 17 and 18 in the operation stop state is executed to stop the blowing of the cooling air R, the exhaust system auxiliary machine 23 including the exhaust gas purifying catalyzer or the like is connected to the cooling air. Cooling with R can be prevented. Therefore, it is possible to effectively promote the warm-up of the exhaust system auxiliary machine 23 and to exhibit the exhaust gas purification function at an early stage.

  In the above-described embodiment, the plurality of cooling fans 17 and 18 are provided side by side in the vehicle width direction in plan view, and each cooling fan 17 and 18 is installed while being inclined toward the installation portion of the exhaust system auxiliary machine 23. Instead of the configuration, at least one of the cooling fans 17 and 18 may be installed in an inclined state toward the installation portion of the exhaust system auxiliary machine 23, and the other may be installed, for example, toward the front side of the vehicle body. .

  5 and 6 show a second embodiment of the vehicle powertrain arrangement structure according to the present invention. In the second embodiment, the first side extension 26 of the exhaust pipe 24 extends between the heat exchanger 16 and the cooling fans 17a, 18a disposed on the rear side thereof so as to extend in the vehicle width direction. The exhaust system auxiliary machine 23 is provided in the first lateral extension 26 of the exhaust pipe 24 so as to extend in the vehicle width direction. The cooling fans 17a and 18a are provided in the vertical direction on the rear side of the heat exchanger 16, and the upper cooling fan 17a is installed in an upwardly inclined state (a forward inclined posture) in a side view. Since the rear cooling fan 18a is installed in a forwardly inclined state (backward inclined posture), the respective cooling fans 17a and 18a are arranged so as to face the installation part of the exhaust system auxiliary machine 23, respectively.

  As shown in the second embodiment, the first lateral extension 26 of the exhaust pipe 24 is disposed between the heat exchanger 16 for cooling the power train and the cooling fans 17a, 18a, and the first According to the configuration in which the exhaust system auxiliary machine 23 provided in the side extension 26 is arranged so as to extend in the vehicle width direction between the heat exchanger 16 and the cooling fans 17a and 18a, the exhaust system auxiliary machine 23 is provided. Even when the installation dimension in the vertical direction is limited, the exhaust system auxiliary machine 23 composed of a large catalyzer having a large diameter can be installed.

  Further, the cooling fans 17a and 18a provided in the vertical direction of the vehicle are respectively inclined toward the installation portion of the exhaust system auxiliary machine 23, thereby sufficiently securing the sizes of the cooling fans 17a and 18a. As a result, a sufficient amount of cooling air R can be secured. Therefore, the exhaust system auxiliary machine 23 can be efficiently cooled by the cooling air supplied from the cooling fans 17a and 18a, and the exhaust system auxiliary machine 23 is excessively heated according to the reaction heat. As a result, there is an advantage that it is possible to effectively prevent thermal deterioration at an early stage, or that the temperature becomes equal to or higher than an appropriate value and the exhaust gas purification function is impaired.

  In each of the above embodiments, a part of the power train 11 including the engine main body 12 arranged vertically in the engine room 2 and the transmission 13 connected to the rear thereof is formed on the dash panel 3. Since the engine main body 12 and the transmission 13 which are heavy objects are arranged as far as possible on the rear side of the vehicle as far as possible, the center of gravity of the vehicle is placed on the center side of the vehicle body. By positioning, there is an advantage that the yaw moment of inertia acting when the vehicle is traveling can be effectively reduced and the steering stability can be improved.

  As the exhaust system auxiliary machine 23, in addition to a catalyst for purifying exhaust gas, a thermal reactor for burning unburned components in exhaust gas, an exhaust turbine for turbocharger, or the like can be considered. However, the above-described exhaust gas purifying catalyzer has an active state remarkably changed in accordance with a temperature change, and tends to be easily deteriorated when heated to a high temperature. Therefore, as shown in the above-described embodiments, when the exhaust system auxiliary machine 23 composed of a catalyst for exhaust gas purification is disposed between the cooling fans 17 and 18 and the heat exchanger 16, the interior of the engine room 2 It is possible to effectively prevent the vehicle auxiliary equipment such as the in-vehicle battery 33 or the alternator (not shown) disposed in the vehicle from being affected by the heat of the exhaust system auxiliary equipment 23. Further, by configuring the exhaust system auxiliary machine 23 composed of the exhaust gas purifying catalyzer according to the cooling air from the cooling fans 17 and 18 etc., the exhaust gas purifying catalyzer has its reaction heat and the like. Therefore, there is an advantage that it is possible to prevent excessive deterioration due to excessive heating and early deterioration of heat, and to effectively prevent the exhaust gas purification performance from being lowered by being heated to a temperature higher than the appropriate reaction temperature.

1 is a side sectional view showing a first embodiment of a vehicle powertrain arrangement structure according to the present invention. It is a top sectional view showing a 1st embodiment of the above-mentioned powertrain arrangement structure. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is side surface sectional drawing which shows 2nd Embodiment of the powertrain arrangement | positioning structure of the vehicle which concerns on this invention. It is a plane sectional view showing a 2nd embodiment of the above-mentioned powertrain arrangement structure. It is side surface sectional drawing which shows the prior art example of the powertrain arrangement structure of the vehicle which concerns on this invention. It is CC sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car compartment 2 Engine room 11 Powertrain 12 Engine main body 13 Transmission 16 Heat exchanger main body 17 Cooling fan 18 Heat exchanger 23 Exhaust system auxiliary machine 24 Exhaust pipe 26 1st side extension part (extended part of exhaust pipe)
27 Longitudinal extension (exhaust pipe extension)

Claims (7)

  In the vehicle in which a dash panel that partitions the vehicle compartment and the engine room is provided with a recessed portion that is recessed into the rear side of the vehicle body, and a part of the power train that drives the wheels is disposed in the recessed portion, A heat exchanger for cooling the power train and a cooling fan for cooling the heat exchanger are disposed in front of the power train, and an exhaust connected to the power train between the cooling fan and the heat exchanger. A vehicle powertrain arrangement structure characterized in that an extension portion of a pipe is provided and an exhaust system auxiliary machine is provided in the extension portion of the exhaust pipe.   An extension part of the exhaust pipe is disposed between the heat exchanger and the cooling fan and extends in the vertical direction, and the exhaust system auxiliary machine is provided in the vertical extension part of the exhaust pipe and extends in the vertical direction. The vehicle powertrain arrangement structure according to claim 1, wherein the vehicle powertrain arrangement structure is provided.   The vehicle powertrain arrangement structure according to claim 1 or 2, wherein the cooling fan is arranged in an inclined state so as to be directed to an installation portion of the exhaust system auxiliary machine.   The vehicle according to any one of claims 1 to 3, wherein the vehicle has a plurality of cooling fans, and at least one of them is arranged so as to face an installation part of an exhaust system auxiliary machine. Powertrain arrangement structure.   5. The vehicle powertrain arrangement structure according to claim 4, wherein the plurality of cooling fans are arranged so as to surround an exhaust system auxiliary machine.   The said power train was provided with the engine main body arrange | positioned by the vertical installation type in an engine room, and the transmission connected to the back, The one of Claims 1-5 characterized by the above-mentioned. Vehicle powertrain arrangement structure.   The vehicle powertrain arrangement structure according to any one of claims 1 to 6, wherein the exhaust system auxiliary device is a catalyst for exhaust gas purification.

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