JP2011106301A - Vehicle drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle drive device achieving a compact layout of an engine and the like, and a rotary electric machine. <P>SOLUTION: The vehicle drive device includes: the engine 20; an intake manifold 70 connected to a cylinder head 22; and the rotary electric machine 30 having a rotary shaft 34 extending in a predetermined direction, and a rotor 33 rotating around the rotary shaft 34. The intake manifold 70 has a shape extending from the cylinder head 22 in the direction away from the cylinder head 22 and a cylinder block 21. The rotary electric machine 30 is disposed between the intake manifold 70 and the cylinder block 21 in an attitude of the rotary shaft 34 extending in a direction parallel to the crankshaft 24. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle drive device that has an engine and a rotating electrical machine and drives wheels of a vehicle such as an automobile.

  2. Description of the Related Art Conventionally, so-called hybrid vehicles have been developed that have an engine and an electric motor and travel by transmitting these power sources simultaneously or individually to wheels.

  For example, Patent Document 1 discloses a drive having a motor / generator and an engine having a motor function for generating a rotational force and a power generation function, and a transmission for transmitting the power of the motor / generator and the engine to a wheel side while shifting the power. A hybrid vehicle with the device is disclosed. In this drive device, the motor / generator is formed integrally with the transmission so that the output shaft of the motor / generator is parallel to the input shaft of the transmission connected to the crankshaft of the engine. Has been placed.

JP 2009-1234 A

  As described above, the drive device for a hybrid vehicle having a rotating electric machine such as an electric motor or a generator has these rotating electric machines as compared with those having only an engine as a power source. There is.

  In view of such circumstances, an object of the present invention is to provide a vehicle drive device that can make a layout of a device mounted on a vehicle by arranging a rotating electrical machine more appropriately.

  In order to solve the above-mentioned problems, the present inventors have paid attention to a dead space formed between an intake manifold connected to the engine and the engine. The intake manifold for introducing the intake air into the combustion chamber of the engine has a shape extending in a direction away from the engine in order to efficiently introduce the intake air into the combustion chamber, and between the intake manifold and the engine, A space is formed, and the present inventors have made the vehicle drive device more compact by effectively using this space. That is, the present invention relates to a cylinder block in which a cylinder is formed, and a cylinder head provided at an upper portion of the cylinder block and having a combustion chamber formed therein and an intake port for introducing intake air into the combustion chamber. And a piston that reciprocates the cylinder and a crankshaft fixed to the piston, and an engine that generates power for driving wheels, and is connected to the cylinder head and communicates with the intake port. An intake manifold, and a rotating electrical machine having a rotating shaft extending in a predetermined direction and a rotor rotating around the rotating shaft, wherein the intake manifold is separated from the cylinder head and the cylinder block. The rotating electrical machine has a shape in which the rotating shaft is To provide a vehicle driving apparatus characterized by being arranged between a posture extending crankshafts in a direction parallel to the intake manifold and the cylinder block (claim 1).

  According to this device, the electric motor is mounted on the vehicle without increasing the size of the entire vehicle drive device by disposing the rotating electric machine such as the electric motor in a dead space between the intake manifold and the cylinder block of the engine. Therefore, the apparatus can be made compact as compared with the case where the rotating electrical machine is arranged in another part. In addition, since the rotating electrical machine is surrounded by the intake manifold and the engine, the operating noise of the rotating electrical machine is insulated by the intake manifold and the engine, and the quietness in the vehicle interior is improved.

  In the present invention, the engine is mounted on a vehicle in a posture in which an axis of the cylinder is inclined in a specific direction with respect to a vertical line, and the intake manifold is located on a side of the cylinder head opposite to the inclination direction of the engine. The rotating electrical machine has a shape connected to a side surface and extending from the side surface to the opposite side of the engine inclination direction, and the rotating electrical machine is between the side surface of the cylinder block opposite to the engine inclination direction and the intake manifold. (Claim 2).

  If it does in this way, the load of the rotary electric machine arrange | positioned between an intake manifold and a cylinder block can be applied to an engine side, and it will become possible to support a rotary electric machine stably.

  In the present invention, it is preferable that the rotating electrical machine has a case that houses a rotating electrical machine main body including the rotating shaft and the rotor, and the case of the rotating electrical machine and the intake manifold are integrally formed ( Claim 3).

  If it does in this way, a rotary electric machine can be easily arrange | positioned between an intake manifold and a cylinder block, and an assembly | attachment of a rotary electric machine can be performed easily.

  In the present invention, it is preferable that a cooling water passage through which cooling water for cooling the rotating electrical machine flows is formed between the intake manifold and the rotating electrical machine.

  In this way, heat generated in the rotating electrical machine can be prevented from being transmitted to the intake manifold, and the rotating electrical machine is disposed between the intake manifold and the cylinder block while maintaining the downsizing of the apparatus. This arrangement can suppress the influence on the intake air in the intake manifold.

  Further, in the present invention, a power transmission device that transmits power of at least one of the engine and the rotating electrical machine to the wheels is provided, and the rotating shaft of the rotating electrical machine transmits power of the engine in the longitudinal direction of the crankshaft. It is preferable that the device is connected to the power transmission device (claim 5).

  In this way, with a simple configuration, the rotating shaft of the rotating electrical machine and the power transmission device are coupled, and the power of the rotating electrical machine is transmitted to the power transmission device, or the rotational force of the wheels is transmitted via the power transmission device. It can be transmitted to the rotating electrical machine.

  Further, in the present invention, a power transmission device that transmits power of at least one of the engine and the rotating electric machine to the wheels is provided, and the power transmission device is disposed adjacent to a longitudinal direction of the engine and the crankshaft. The rotating shaft of the rotating electrical machine is preferably connected to the end of the crankshaft in the longitudinal direction opposite to the end of the power transmission device (Claim 6).

  In this way, with a simple configuration, the rotating shaft of the rotating electrical machine and the crankshaft can be connected to transmit the power of the rotating electrical machine to the crankshaft or transmit the rotational force of the crankshaft to the rotating electrical machine. it can.

  In the configuration in which the power transmission device is disposed adjacent to the longitudinal direction of the engine and the crankshaft, the engine is mounted on a vehicle in a lateral posture in which the crankshaft extends in the vehicle width direction. (Claim 7).

  If it does in this way, a power transmission device can be easily arrange | positioned in the position adjacent to the longitudinal direction of the said crankshaft of an engine.

  As described above, according to the present invention, the rotating electrical machine can be laid out in a compact manner.

1 is a schematic top view of an engine room in which a vehicle drive device according to a first embodiment of the present invention is mounted. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a schematic block diagram of the vehicle drive device which concerns on the 2nd Embodiment of this invention. It is a schematic block diagram of the vehicle drive device which concerns on the 3rd Embodiment of this invention. It is a schematic block diagram of the vehicle drive device which concerns on the 4th Embodiment of this invention. It is a schematic block diagram of the vehicle drive device which concerns on the 5th Embodiment of this invention. It is a schematic sectional drawing of the vehicle drive device which concerns on 5th Embodiment shown in FIG. It is a schematic block diagram of the vehicle drive device which concerns on the 6th Embodiment of this invention.

  A preferred first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view of an interior of an engine room 2 of a hybrid vehicle 1 equipped with a vehicle drive device 10 according to the first embodiment as viewed from above. The vehicle drive device 10 shown in this figure decelerates the engine 20 and the electric motor (rotary electric machine) 30 as power sources for driving the wheels 3 and the power of the engine 20 or the electric motor 30 at a predetermined reduction ratio. However, it has a transaxle 60 including a transmission (power transmission device) 40 and a differential gear 50 that transmit to the drive shaft 4 connected to the wheels 3, and an intake manifold 70 connected to the engine 20. The vehicle 1 according to this embodiment is a so-called parallel type hybrid vehicle in which both the power of the engine 20 and the electric motor 30 is transmitted to the drive shaft 4.

  As shown in FIG. 2, the engine 20 includes a cylinder block 21 and a cylinder head 22 placed thereon. A plurality of cylinders 23 are formed inside the cylinder block 21 and the cylinder head 22. Although the number of these cylinders 23 is not specifically limited, In this embodiment, the four cylinders 23 are formed in a state of being arranged in a straight line. A crankshaft 24 is rotatably supported on the cylinder block 21 in a state in which the crankshaft 24 extends in the arrangement direction of the cylinders 23 by a journal, a bearing, or the like.

  A power transmission gear 29 is fixed to one end of the crankshaft 24 coaxially with the crankshaft 24 via a clutch (not shown). The output shaft of the power transmission gear 29 is connected to the transmission 40, and the output of the engine 20 is transmitted to the transmission 40 via the power transmission gear 29.

  Pistons 27 are slidably fitted in the cylinders 23, and combustion chambers 25 are defined above the pistons 27 with the cylinder heads 22.

  The cylinder head 22 is formed with two intake ports 26 a and two exhaust ports 26 b communicating with the respective combustion chambers 25. The cylinder head 22 is provided with an ignition plug 28 and an intake valve, an exhaust valve, and an injector (not shown) for shutting off the intake port 26a and the exhaust port 26b from the combustion chamber 25, respectively.

  The engine 20 is disposed in the engine room 2 in a horizontal posture with the crankshaft 24 extending in the vehicle width direction, and each intake port 26a is forward of the cylinder head 22 in the vehicle front-rear direction (hereinafter simply referred to as a vehicle). (It may be called the front side.) These intake ports 26a extend forward and obliquely upward. Further, the engine 20 is disposed in the engine room 2 in a rearward leaning posture in which the axis c1 (see FIG. 2) of the cylinder 23 is inclined rearward of the vertical line passing through the crankshaft 24.

  The transmission 40 is for transmitting the power of the engine 20 or the electric motor 30 to the differential gear 50 while shifting the power. The transmission 40 is disposed at a position adjacent to the engine 20 in the vehicle width direction, and is configured such that power from the engine 20 and the electric motor 30 is input via the power transmission gear 29. The power transmission gear 29 is provided at the end of the crankshaft 24 on the transmission 40 side.

  The differential gear 50 is for transmitting the power of the engine 20 or the electric motor 30 transmitted through the transmission 40 to the drive shaft 4. The transmission 40 and the differential gear 50 may be conventional ones, and the description of the details of the mechanism is omitted. For example, in the transmission 40, the power transmission gear 29 is arranged coaxially with the power transmission gear 29. The power of the engine 20 or the electric motor 30 is transmitted to the primary gear 42 via the torque converter 41, and the power is transmitted to the gear 51 on the differential gear 50 side via the secondary gear 43 that meshes with the primary gear 42.

  The intake manifold 70 communicates with the intake port 26a. Specifically, the intake manifold 70 has four branch pipes 71 arranged in a direction parallel to the crankshaft 24 for introducing intake air into the combustion chamber 25 of each cylinder 23. Are connected to the two intake ports 26a of each cylinder 23, respectively. The intake manifold 70 composed of the branch pipes 71 extends in the direction away from the cylinder head 22 and the cylinder block 21 at the front of the vehicle, that is, from the portion of the cylinder head 22 where the intake port 26a is opened, at substantially the same inclination angle as the intake port 26a. After extending obliquely upward, it is curved downward and extends downward substantially parallel to the front side surface 20a of the engine 20. In this way, the intake manifold 70 extends in a direction away from the engine 20 so that the intake air smoothly flows into the combustion chamber 25 with a smaller resistance, and between the intake manifold 70 and the front side surface 20a of the engine 20. A predetermined space is formed.

  A surge tank 81 is provided upstream of the intake manifold 70, and a throttle body 83 is provided in the intake passage 82 upstream of the surge tank 81. Further, an air cleaner 84 is disposed upstream of the throttle body 83. In the present embodiment, the surge tank 81 is disposed at the lower end of the intake manifold 70 and extends in the direction in which the branch pipes 71 are arranged, that is, in the direction parallel to the crankshaft 24.

  The electric motor 30 has a substantially cylindrical shape extending in a predetermined direction. The electric motor 30 includes, for example, a three-phase AC synchronous motor and the like, and includes a stator 32 and a rotor 33 housed in a substantially cylindrical motor case (case) 31. The stator 32 is obtained by winding a coil around a substantially cylindrical stator core. The rotor 33 is a substantially cylindrical member provided on the inner peripheral side of the stator 32, and is arranged such that a motor output shaft (rotating shaft) 34 arranged at the axial center extends in the longitudinal direction of the motor case 31. ing. As will be described later, the electric motor 30 is connected to the transmission 40 via a gear or the like. When the electric power is supplied from the battery via the inverter 85, the drive shaft 4 is connected via the transmission 40 and the differential gear 50. On the other hand, when decelerating or traveling downhill, power is generated by obtaining the rotational force of the wheels 3 from the drive shaft 4 via the transmission 40, and the generated power is stored in the battery. A member including a stator 32, a rotor 33, and a motor output shaft 34 housed in a motor case 31 of the electric motor 30 constitutes a main body (rotary electric machine main body) of the electric motor 30.

  As described above, a predetermined space is formed between the intake manifold 70 and the front side surface 20a of the engine 20. The present inventors paid attention to this space, and realized the downsizing of the entire vehicle drive device 10 by arranging the electric motor 30 in this space. That is, in the vehicle drive device 10, the direction in which the branch pipes 71 of the intake manifold 70 are arranged, that is, the crankshaft 24 between the intake manifold 70 and the engine 20, more specifically between the intake manifold 70 and the cylinder block 21. An electric motor 30 is disposed so that the motor output shaft 34 extends in parallel with the motor.

  In the present embodiment, the intake manifold 70 and the substantially cylindrical motor case 31 are integrally formed. That is, the curved portion of the side surface 71 a on the engine 20 side of each branch pipe 71 of the intake manifold 70 constitutes a part of a substantially cylindrical motor case 31, and the motor case 31 is the engine 20 side of these branch pipes 71. It is formed so as to protrude from the side surface 71a to the engine 20 side. The motor case 31 extends over the entire four branch pipes 71. The rotor 33 and the like are inserted and fixed in the motor case 31 formed integrally with the intake manifold 70, so that the motor output shaft 34 is arranged in the direction in which the branch pipes 71 are arranged, that is, the crankshaft. 24 is arranged between the intake manifold 70 and the cylinder block 21 in a state of being surrounded by these.

  The intake manifold / motor case subassembly 72 in which the intake manifold 70 and the motor case 31 are integrally formed is made of, for example, a resin or an aluminum casting. Further, in the intake manifold / motor case subassembly 72, the downstream end of the intake manifold 70 is fixed to the cylinder head 22 in a state where the main body of the electric motor 30 such as the rotor 33 is accommodated in the motor case 31. At the same time, the surge tank 81 formed integrally with the intake manifold 70 upstream of the intake manifold 70 is supported by the engine 20 by being fixed to a stay 21a protruding forward provided on the front side surface of the cylinder block 21. ing. Here, as described above, the engine 20 is disposed in the engine room 2 in a rearward inclined state, and the intake manifold / motor case subassembly 72 and the rotor 33 accommodated therein are arranged via the stay 21a. The load on the main body of the electric motor 30 is applied to the front side surface 20 a of the engine 20, and the electric motor 30 and the like are stably supported by the engine 20.

  A cooling water passage 35 is formed in the motor case 31, that is, between the inner peripheral surface 31 a and the outer peripheral surface 31 b. In the present embodiment, the cooling water passage 35 is formed over substantially the entire circumference of the motor case 31 and over substantially the entire axial direction. The motor case 31 is provided with a cooling water inlet 35a and a cooling water outlet 35b communicating with the cooling water passage 35 and the outside of the motor case 31, and cooling from a radiator (not shown) from the cooling water inlet 35a. Water is introduced into the cooling water passage 35. The cooling water flows through the cooling water passage 35 and is discharged from the cooling water outlet 35b to the radiator side while cooling the rotor 33 and the like in the motor case 31 and cooling the intake air in the intake manifold 70. The By the cooling, the temperature rise of the electric motor 30 is suppressed, and the intake efficiency is increased. In particular, it is avoided that the cooling water flows between the electric motor 30 and the intake manifold 70 so that the heat of the electric motor 30 is transmitted to the intake air and the temperature of the intake air rises.

  A motor-side output gear 36 is fixed to the end of the motor output shaft 34 housed in the motor case 31 on the transmission 40 side so as to be coaxial with the motor output shaft 34 and to rotate integrally with the motor output shaft 34. ing. The motor side output gear 36 is connected to the power transmission gear 29, and the electric motor 30 and the transmission 40 are connected via the power transmission gear 29. In the present embodiment, the motor-side output gear 36 is disposed on substantially the same plane as the power transmission gear 29, and meshes with the power transmission gear 29 via two connection gears 37a and 37b.

  Since the electric motor 30 is connected to the transmission 40 via the power transmission gear 29 as described above, in the vehicle 1, the clutch between the power transmission gear 29 and the crankshaft 24 is connected. In addition to the engine 20, an electric motor 30 is connected to the transmission 40 and thus to the drive shaft 4. The electric motor 30 receives power from the battery to assist the torque of the engine 20 or is driven by the engine 20 to generate power. On the other hand, in a state where the clutch is disconnected, only the electric motor 30 is connected to the drive shaft 4, and the drive shaft 4 is driven only by the electric motor 30, or the rotational force of the wheel 3 via the drive shaft 4. To generate electricity.

  As described above, in the vehicle drive device 10, the electric motor 30 is arranged between the intake manifold 70 and the cylinder block 21, and it is necessary to prepare a space for arranging the electric motor 30 separately. In addition, the layout in the engine room 2 can be made compact. For example, as compared with the case where the electric motor 30 is disposed above the transmission 40, other supplementary notes such as an air cleaner 84 and an inverter 85 may be disposed above the transmission 40 instead of the electric motor 30. It becomes possible. Further, since the operation sound of the electric motor 30 is sound-insulated by the intake manifold 70 surrounding the electric motor 30 and the engine 20, the quietness in the passenger compartment can be enhanced.

  Here, the intake manifold 70 and the electric motor 30 may be separate. In this case, it is preferable to dispose the electric motor 30 between the intake manifold 70 and the cylinder block 21 while disposing a cushioning material between the intake manifold 70 and the electric motor 30 so as to avoid these collisions. However, if the intake manifold 70 and the electric motor 30 are formed integrally as described above, the apparatus can be simplified and the electric motor 30 can be easily assembled.

  Further, the arrangement posture of the engine 20 is not limited to the above. For example, the engine 20 may be arranged vertically with the crankshaft 24 extending in the vehicle longitudinal direction. Further, for example, the cylinder axis c1 may be arranged so as to extend in the vertical direction. However, as described above, the engine 20 is disposed between the intake manifold 70 and the cylinder block 21 if the engine 20 is disposed to be inclined to the side opposite to the side on which the intake manifold 70 is fixed (in this embodiment, rearward). The electric motor 30 can be stably supported by the engine 20.

  Further, the specific structure of the cooling water passage 35 formed in the motor case 31 is not limited to the above. However, if the cooling water passage 35 is formed between the intake manifold 70 and the rotor 33 as described above, it is possible to prevent the heat generated in the rotor 33 and the like from being transferred to the intake air in the intake manifold 70. At the same time, the intake air can be cooled to improve the intake efficiency.

  The connection structure between the electric motor 30 and the transmission 40 is not limited to the above. For example, a predetermined gear of the transmission 40 and the motor side transmission gear 36 may be directly meshed with each other.

  Next, a second embodiment of the vehicle drive device according to the present invention will be described with reference to FIG.

  In the vehicle drive device 210 according to the second embodiment, an integrated starter generator (ISG) 90 is disposed between the intake manifold 70 and the cylinder block 21 in addition to the electric motor 30. In the vehicle drive apparatus 210 according to the second embodiment, the structure other than the arrangement of the ISG 90 and the connection between the ISG 90 and the engine 20 is the same as that of the first embodiment, and details thereof are omitted. To do.

  The ISG 90 includes an ISG main body such as a rotor housed in a substantially cylindrical ISG case (case) 91 extending in the axial direction, and an ISG output shaft (rotating shaft) 92 protruding from the ISG case 91 in the axial direction. The engine 20 is started and generates electric power. Specifically, the ISG 90 functions as a starter that starts the engine 20 by forcibly rotating the crankshaft 24 of the engine 20, and functions as an alternator that generates power by obtaining power from the crankshaft 24 of the engine 20. It has both. Further, the ISG 90 can perform not only start-up and power generation of the engine 20, but also so-called torque assist that applies torque to the engine 20 during acceleration or the like.

  In the vehicle drive device 210, the electric motor 30 is disposed between the intake manifold 70 and the cylinder block 21 at a position from the end of the intake manifold 70 on the transmission 40 side to approximately the middle in the vehicle width direction. The ISG 90 is disposed at a position from approximately the middle to the vicinity of the end of the intake manifold 70 opposite to the transmission 40. The ISG 90 includes a central axis of the ISG case 91 and an ISG output shaft 92 extending in the vehicle width direction, that is, in a direction parallel to the crankshaft 24, and the ISG output shaft 92 extends from the ISG case 91 at the end opposite to the transmission 40. It is arranged in a state of protruding outward.

  An ISG pulley 93 is fixed to the ISG output shaft 92 of the ISG 90. An engine-side pulley 229 that rotates integrally with the crankshaft 24 is fixed to the opposite side of the crankshaft 24 from the transmission 40. The ISG side pulley 93 and the engine side pulley 229 are connected by a belt 94. With this connection, the ISG output shaft 92 of the ISG 90 rotates integrally with the crankshaft 24, receives electric power from the battery, and receives the power from the battery. A rotational torque is applied to the motor or power is generated by receiving a rotational force from the crankshaft 24.

  As described above, in the vehicle drive device 210 according to the second embodiment, in addition to the electric motor 30, the ISG 90 is disposed between the intake manifold 70 and the cylinder block 21, and the layout of the engine room 2 Further downsizing becomes possible. Further, in addition to the operation sound of the electric motor 30, the operation sound of the ISG 90 is blocked by the intake manifold 70 and the engine 20, and quietness is further improved.

  Note that the connection structure between the ISG 90 and the crankshaft 24 is not limited to that using the belt 94, and these may be connected by meshing of gears.

  Further, the ISG case 91 and the intake manifold 70 may be integrally formed.

  Next, a third embodiment of the vehicle drive device according to the present invention will be described with reference to FIG.

  In the vehicle drive device 310 according to the third embodiment, the ISG 90 is disposed between the intake manifold 70 and the cylinder block 21, while the electric motor 30 is disposed other than between the intake manifold 70 and the cylinder block 21. It is arranged at the position. That is, unlike the structure in which the motor-side output gear 36 of the electric motor 30 and the power transmission gear 29 of the crankshaft 24 mesh with each other via the connection gears 37a and 37b as in the first embodiment, the electric motor 30 For example, it is disposed near the differential gear 50 and is directly connected to the drive shaft 4. Therefore, the output of the electric motor 30 is transmitted to the drive shaft 4 without driving the transmission 40 and the drive shaft 4 is driven, and the rotational force of the drive shaft 4 is directly transmitted to the electric motor 30 to generate electric power. . The other configuration of the vehicle drive device 310 according to the third embodiment is the same as that of the second embodiment, and the details thereof are omitted.

  In this vehicle drive device 310, only the ISG 90 is arranged between the intake manifold 70 and the cylinder block 21, and it is possible to provide a large capacity ISG 90 while making the layout in the engine room 2 compact.

  Here, as the electric motor 30 and the crankshaft 24 are disposed on the drive shaft 4 side, the ISG 90 has its ISG output shaft 92 projecting from the transmission 40 side end portion of the intake manifold 70 toward the transmission 40 side. You may arrange in. That is, in the vehicle drive device 410 according to the fourth embodiment, as shown in FIG. 6, unlike the vehicle drive device 310 according to the third embodiment, the ISG output shaft 92 of the ISG 90 is located on the transmission 40 side. The ISG output shaft 92 and the crankshaft 24 are connected on the transmission 40 side of the engine 20. Specifically, an ISG output gear 493 is fixed to the transmission 40 side end of the ISG output shaft 92, and the connection gear 429 fixed to the ISG side output gear 493 and the transmission 40 side end of the crankshaft 24. And the ISG output shaft 492 and the crankshaft 24 are connected by the meshing of the gears. The connection gear 429 is provided closer to the crankshaft 24 than the clutch that disconnects the crankshaft 24 and the transmission 40, and the ISG 90 is always connected to the crankshaft 24.

  Next, a fifth embodiment of the vehicle drive device according to the present invention will be described with reference to FIG.

  In the vehicle drive device 510 according to the fifth embodiment, only the power of the electric motor 30 is transmitted to the drive shaft 4, and the power of the engine 20 is used for charging a battery that supplies power to the electric motor 30. Applied to series hybrid vehicles. The vehicle drive device 510 includes the ISG 90, and the ISG 90 receives power from the engine 20 to generate power and charge the battery.

  In the vehicle drive device 510, the engine 20 and the transmission 540 are not connected, and only the electric motor 30 is connected to the transmission 540.

  The electric motor 30 is disposed between the intake manifold 70 and the cylinder block 21 in a state of extending in parallel with the crankshaft 24 extending in the vehicle width direction as in the first embodiment. The motor output shaft 34 of the electric motor 30 is connected to a predetermined input member of the transmission 540. As this connection structure, for example, as shown in FIG. 8, a motor-side output gear 536 fixed to the motor output shaft 34 and an input gear 541 of a transmission 540 arranged coaxially with the motor output shaft 34 mesh with each other. Are connected. The input gear 541 of the transmission 540 is connected to the secondary gear 43 by a chain belt or the like, and the electric motor 30 is connected to the differential gear 50 via the input gear 541 and the secondary gear 43. . The electric motor 30 is disposed between the intake manifold 70 and the cylinder block 21 at a position from the end portion on the transmission 540 side of the intake manifold 70 to approximately the middle in the vehicle width direction.

  The arrangement of the ISG 90 and the connection structure with the engine 20 are the same as those of the vehicle drive device 210 according to the second embodiment. That is, the ISG 90 has an ISG output shaft 92 extending in a direction parallel to the crankshaft 24 at a position from approximately the middle of the intake manifold 70 in the vehicle width direction to the vicinity of the end of the intake manifold 70 opposite to the transmission 540. It is arranged so as to protrude on the opposite side to the transmission 540. An ISG pulley 93 is fixed to the ISG output shaft 92 of the ISG 90. The ISG pulley 93 and an engine pulley 229 fixed to the end of the crankshaft 24 opposite to the transmission 540 are connected to the belt. 94 or a gear or the like.

  In this vehicle drive device 510, as the engine 20 is driven, the ISG 90 receives the rotational force from the crankshaft 24 to generate electric power to charge the battery, and the electric motor 30 rotates by receiving electric power from the battery and rotates. The force is transmitted to the differential gear 50 through the transmission 540, and the wheel 3 is driven. When the vehicle is decelerating or traveling downhill, the electric motor 30 generates power by obtaining the rotational force of the wheels 3 via the drive shaft 4 and the transmission 540, and stores the generated power in the battery.

  Here, only the electric motor 30 may be disposed between the intake manifold 70 and the cylinder block 21, and the ISG 90 may be disposed at a place other than between them. That is, in the vehicle drive device 610 according to the sixth embodiment of the present invention, as shown in FIG. 9, the large-capacity electric motor 30 extending over the entire vehicle width direction of the intake manifold 70 includes the intake manifold 70 and the cylinder. It is arranged between the block 21. On the other hand, the ISG 90 is arranged on the opposite side to the transmission 540 of the engine 20 in a state of being aligned with the engine 20 in the vehicle width direction. The crankshaft 24 and the ISG output shaft 92 of the ISG 90 are arranged coaxially, and the crankshaft 24 and the ISG output shaft 92 are directly connected.

  In this vehicle drive device 610, the electric motor 30 is disposed between the intake manifold 70 and the cylinder block 21, and the ISG 90 is continuously provided in the vehicle width direction of the engine 20, so that the arrangement in the engine room 2 can be made compact. A large-capacity electric motor 30 can be provided while being maintained.

  As described above, according to the vehicle drive device of the present invention, the electric motor 30 and / or the ISG 90 are disposed between the intake manifold 70 and the cylinder block 21, so that the parallel hybrid vehicle and the series hybrid vehicle are arranged. In any of the above, the overall layout of the engine room 2 can be made compact to reduce the size of the entire apparatus, and the operation sound of the electric motor 30 and / or the ISG 90 can be insulated by the intake manifold 70 and the engine 20. The quietness in the passenger compartment can be improved.

2 Engine room 3 Wheel 10 Vehicle drive device (first embodiment)
20 Engine 21 Cylinder Block 22 Cylinder Head 23 Cylinder 24 Crankshaft 25 Combustion Chamber 26a Intake Port 27 Piston 30 Electric Motor (Rotating Electric Machine)
31 Motor case (case)
33 Rotor 34 Motor output shaft (rotary shaft)
35 Cooling water passage 40 Transmission (power transmission device according to first to fourth embodiments)
70 Intake manifold 90 ISG (Rotating electric machine)
91 ISG Case (Case)
92 ISG output shaft (rotary shaft)
210 Vehicle Drive Device (Second Embodiment)
310 Vehicle Drive Device (Third Embodiment)
410 Vehicle Drive Device (Fourth Embodiment)
510 Vehicle Drive Device (Fifth Embodiment)
540 Transmission (Power transmission device according to fifth and sixth embodiments)
610 Vehicle drive device (sixth embodiment)

Claims (7)

A cylinder block in which a cylinder is formed, a cylinder head provided at an upper portion of the cylinder block, in which a combustion chamber is formed, and an intake port for introducing intake air into the combustion chamber is formed, and the cylinder is reciprocated. An engine having a moving piston and a crankshaft fixed to the piston and generating power for driving the wheels;
An intake manifold connected to the cylinder head and communicating with the intake port;
A rotating electrical machine having a rotating shaft extending in a predetermined direction and a rotor rotating around the rotating shaft;
The intake manifold has a shape extending from the cylinder head in a direction away from the cylinder head and the cylinder block,
The vehicular drive apparatus, wherein the rotating electrical machine is disposed between the intake manifold and the cylinder block so that the rotating shaft extends in a direction parallel to the crankshaft. The vehicle drive device according to claim 1,
The engine is mounted on a vehicle in a posture in which the axis of the cylinder is inclined in a specific direction with respect to a vertical line,
The intake manifold is connected to a side surface of the cylinder head opposite to the engine tilt direction and extends from the side surface to the engine tilt direction,
The vehicular drive apparatus according to claim 1, wherein the rotating electrical machine is disposed between a side surface of the cylinder block opposite to the engine inclination direction and the intake manifold. The vehicle drive device according to claim 1 or 2,
The rotating electrical machine has a case that houses a rotating electrical machine main body including the rotating shaft and the rotor,
The vehicular drive apparatus, wherein the rotating electrical machine case and the intake manifold are integrally formed. The vehicle drive device according to any one of claims 1 to 3,
A vehicular drive device characterized in that a cooling water passage is formed between the intake manifold and the rotating electrical machine so that cooling water for cooling the rotating electrical machine can flow therethrough. The vehicle drive device according to any one of claims 1 to 4,
A power transmission device that transmits power of at least one of the engine and the rotating electric machine to the wheels;
The power transmission device is disposed adjacent to a longitudinal direction of the engine and the crankshaft,
The vehicular drive device, wherein the rotating shaft of the rotating electrical machine is coupled to the power transmission device on the engine power transmission device side in the longitudinal direction of the crankshaft. The vehicle drive device according to any one of claims 1 to 4,
A power transmission device that transmits power of at least one of the engine and the rotating electric machine to the wheels;
The power transmission device is disposed adjacent to a longitudinal direction of the engine and the crankshaft,
The rotating shaft of the rotating electrical machine is connected to an end portion on the opposite side of the power transmission device among end portions in the longitudinal direction of the crankshaft. The vehicle drive device according to claim 5 or 6,
The engine is mounted on a vehicle in a horizontal posture in which the crankshaft extends in the vehicle width direction.

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