JP3384719B2 - Hybrid vehicle drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid vehicle drive system in which a motor generator is connected to an internal combustion engine.

[0002]

2. Description of the Related Art An internal combustion engine that generates a driving force by burning gasoline and a motor generator that is used as a motor that assists the output of the internal combustion engine by generating a driving force by power generation and electric power by regeneration are provided. There has been proposed a hybrid vehicle that drives the vehicle by synthesizing the driving forces by these as necessary (see Japanese Patent Laid-Open No. 9-156388).

In the hybrid vehicle, a transmission is connected to a crankshaft of an internal combustion engine via a flywheel and a clutch mechanism, and a motor generator is connected to a drive gear that constitutes the transmission.

By the way, the motor generator itself generates a considerable amount of heat when it is driven, but no conventional hybrid vehicle has given special consideration to this heat.

That is, since the motor generator has a drawback that its efficiency decreases when the environmental temperature rises, it is necessary to consider the influence of the temperature during driving. It is also necessary to consider that when the motor generator is arranged near the internal combustion engine, the heat of the internal combustion engine affects the motor generator. Further, if the temperature of the motor generator rises or there is a temperature difference with respect to the environmental temperature, it is conceivable that water vapor in the use atmosphere will condense and water will be generated in the motor generator. This moisture causes an accident such as a short circuit for a motor generator that uses electricity.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and it is possible to efficiently release the heat generated in the motor generator and store water inside the motor generator. An object of the present invention is to provide a hybrid vehicle drive device that is free from the risk of causing such a problem.

[0007]

In a hybrid vehicle drive system according to the present invention, heat of a motor generator connected to an internal combustion engine is radiated to the outside through an air bleeding mechanism and is provided in a lower portion of a housing of the motor generator. The water in the housing can be removed by the water draining mechanism. As a result, the heat loss of the motor generator can be minimized, and the occurrence of rust, electric leakage, etc. can be avoided.

Of the air bleeding mechanism and the water bleeding mechanism, at least the air bleeding mechanism has a labyrinth structure so that maintenance is unnecessary and air bleeding and water bleeding can be realized at all times without invading dust inside. You can Furthermore, by providing fins on the rotor of the motor generator, it is possible to forcibly generate a flow of air and perform heat dissipation more efficiently.

Furthermore, by constructing the labyrinth structure with a plurality of steps formed inside the cap member,
As compared with the case where the motor generator is directly mounted on the housing, the manufacturing thereof can be made easier.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a hybrid vehicle V to which a hybrid vehicle drive device of this embodiment is applied.

The hybrid vehicle V includes, for example, an internal combustion engine E that generates a driving force by burning gasoline, a motor generator M that generates a driving force by power generation and electric power by regeneration, and assists the output of the internal combustion engine E. Clutch mechanism C including flywheel
And a transmission T that switches the driving force and transmits the driving force to the drive shaft 10.

The motor generator M is driven and controlled by the motor drive circuit 12, and the motor drive circuit 12 supplies / charges high-voltage power, for example, a first capacitor 13 composed of a capacitor, A second battery 15 that stores electric power is connected via the downverter 14. Further, the hybrid vehicle V has a management control circuit 16 and the management control circuit 16
A motor control circuit 17 for controlling the motor generator M and an engine control circuit 18 for controlling the internal combustion engine E are connected to the motor drive circuit 12.

Next, the structures of the internal combustion engine E, the motor generator M, the clutch mechanism C and the transmission T will be described in detail.

2 to 4 show a drive device for a manual vehicle. The internal combustion engine E including three cylinders includes an oil pan 22, a cylinder block 24, and a cylinder head 26. In addition, in the upper part of the cylinder head 26,
The head cover 27 is attached. Journal bearings 30a to 30d and 3 supporting the crankshaft 28 are provided at the joint portion between the oil pan 22 and the cylinder block 24.
2a to 32d are formed. Crankshaft 28
Are the journals 34a to 34d and the crank pin 36a.
˜36c and counterweights 38a to 38f, and the journals 34a to 34d are the journal bearings 3.
It is pivotally supported by 0a-30d and 32a-32d. A connecting rod 40 is attached to the crank pins 36a to 36c.
One ends of a to 40c are connected. Connecting rod 40a-
At the other end of 40c, pistons 44a to 44 that are displaced along the cylinders 42a to 42c of the cylinder block 24 are provided.
c is connected.

The motor generator M and the clutch mechanism C are connected to the end of the internal combustion engine E by a housing 4.
It is stored in 6. FIG. 5 is a view of the motor generator M as seen from the internal combustion engine E side. The oil pan 22 and the cylinder block 2 are provided on the outer peripheral portion of the housing 46.
4, bolt holes 57a to 57f for attaching the housing 46 with the bolt B are formed.

An air bleeding mechanism 59 is arranged above the housing 46. The air bleeding mechanism 59 is shown in FIG.
As shown in FIG. 6C, it is composed of a conduit 61 that communicates the inside and outside of the housing 46, and a cap member 63 attached to the upper end of the conduit 61. The inner peripheral portion of the cap member 63 has a labyrinth structure in which a plurality of substantially fan-shaped step portions 65a, 65b and 67a, 67b that come into contact with the outer peripheral portion of the conduit 61 are formed at the same position in two upper and lower stages. There is. Therefore, a gap in which air flows is formed between the outer peripheral portion of the pipe line 61 and the outer peripheral portion of the cap member 63. The plurality of steps 65a, 65b and 67a, 67b are
As shown in FIG. 7A to FIG. 7C, two upper and lower parts are formed along the pipe line 61.
It is also possible to have a labyrinth structure with staggered arrangement. Needless to say, the air bleeding mechanism 59 can be more effectively bleeded by providing the air bleeding mechanism 59 at the highest portion in the vertical direction of the hybrid vehicle V.

At the bottom of the housing 46, the drainage mechanism 6
9a and 69b are provided. This drainage mechanism 69a, 6
9b is a bolt screwed into the housing 46.
Therefore, the bolts forming the drainage mechanisms 69a and 69b can be removed to drain water regularly or as needed. The water draining mechanisms 69a and 69b are shown in FIG.
It may have the same configuration as the air bleeding mechanism 59 shown in A to FIG. 6C or FIGS. 7A to 7C. It goes without saying that the drainage mechanisms 69a and 69b can be more effectively drained by being provided at the lowermost portion of the hybrid vehicle V in the vertical direction.

In FIG. 5, the motor generator M is
It is composed of a circular rotor 48 and a donut-shaped stator 50 mounted on the outer peripheral portion thereof. The rotor 48 is directly fixed to the end portion of the crankshaft 28 by the bolt 56 (see FIG. 4). In this case, since the motor generator M is closely connected to the crankshaft 28, sufficient rigidity can be secured. The rotor 48 is provided with a plurality of fins 58 and 60 on both side surfaces thereof, and a plurality of magnets 62 are alternately arranged on the outer peripheral portion of N poles and S poles.
The stator 50 is configured by arranging a plurality of coil units 64 in the circumferential direction. In the coil unit 64, a coil 70 is wound around an outer peripheral portion of a core 66 formed by laminating a plurality of metal plates via a guide member 68 having a substantially U-shaped cross section. The stator 50 is connected to the internal combustion engine E via a mounting member 72 arranged on the outer peripheral portion of these coil units 64.
Fixed to the side of.

Grooves 74 and 76 are formed on the guide member 68 on the internal combustion engine E side along the outer peripheral side and the inner peripheral side of the stator 50, and three conductive connecting rings are formed in the groove 74. 78a to 78c are superposed and mounted. An insulating layer is formed on the surface of each of the connecting rings 78a to 78c, and every two of the connecting rings 78a to 78c are connected to the coil 70 wound around the coil unit 64 so as to be driven by a three-phase alternating current.

On the side surface of the stator 50 on the internal combustion engine E side, a disk-shaped magnetic shield plate 80 for avoiding leakage of magnetic flux to the internal combustion engine E is mounted. Also,
A connector 86 is formed on the magnetic shielding plate 80,
In this connector 86, the connection rings 78a to 78c
The terminal plate 9 in which the terminal portions 88a to 88c projecting outward from the connector plate are introduced from a connector 90 provided in the housing 46.
2a to 92c.

On the other hand, a donut-shaped first partition wall 94 fixed to the housing 46 is arranged on the side surface of the stator 50 on the transmission T side. The inner wall of the first partition 94 is curved toward the transmission T. A position detection sensor 96 that detects the rotational position of the rotor 48 with respect to the stator 50 is mounted on the first partition 94.

Further, in the clutch mechanism C, the rotor 4
A disk-shaped flywheel 100 is fixed to the shaft 8 from the transmission T side by a bolt 98 via a positioning pin 99. A ring gear 106 that meshes with a drive gear 104 of a starter motor 102 is formed on an outer peripheral portion of the flywheel 100, and a drive plate 107 and a donut-shaped second partition wall 108 are provided on a side surface of the motor generator M side. Is fixed. Second partition 1
08 is configured such that the inner peripheral side thereof is curved toward the first partition wall 94 side and overlaps with the first partition wall 94 in the radial direction.

The driving plate 107 includes
A hole 110 is formed in a portion facing the position detection sensor 96, and the rotational position of the driving plate 107 that rotates with the rotation of the rotor 48 is detected by the detection of the hole 110 by the position detection sensor 96. In this case, the magnet 62 mounted on the rotor 48 and the hole 110 formed in the driving plate 107 are aligned with each other by the positioning pin 99 that engages between the rotor 48 and the flywheel 100.

On the other hand, on the side surface of the flywheel 100 on the transmission T side, the friction disc 112 is provided.
Are placed. The friction disc 112 includes a boss portion 116 having a spline formed on the inner circumference thereof and the boss portion 1
A plate 120 is arranged on the outer peripheral portion of the plate 16 via a torsion spring 118, and friction plates 122a and 122b joined to both surfaces of the plate 120.

The pressure plate 12 is provided on the side of the friction plate 122b forming the friction disk 112.
4 are arranged. On the transmission T side of the pressure plate 124, an outer peripheral portion of a diaphragm spring 130 held by a wire spring 128 in a housing 126 fixed to the flywheel 100 is arranged. On the other hand, the piston 132 is arranged on the transmission T side of the inner peripheral portion of the diaphragm spring 130. The piston 132 is arranged on the outer peripheral portion of the boss portion 134 formed in the housing 46, and is displaced along the boss portion 134 by a hydraulic mechanism (not shown) to press the diaphragm spring 130. In addition, the boss portion 134 and the friction disk 11
The shaft 136 from the transmission T is inserted into the second boss portion 116.

The transmission T is surrounded by a transmission case 137, and a transmission mechanism (not shown) is housed in the transmission case 137. In this case, the starter motor 102 is mounted on the outer side of the mission case 137. Starter motor 102
Is fixed to the cylinder block 24 of the internal combustion engine E via the transmission case 137 and the housing 46 with a plurality of tightening bolts B. Further, the mission case 137, the housing 46, and the internal combustion engine E
Are bolt holes 57a to 57 of the housing 46 shown in FIG.
It is fastened by the tightening bolt B via f.

The hybrid vehicle drive system of the present embodiment is basically constructed as described above. Next, its function and effect will be explained.

First, the case where the hybrid vehicle V is driven by the internal combustion engine E will be described. By driving the starter motor 102, the drive gear 104
And the flywheel 100 via the ring gear 106.
Rotates, and the rotor 48 connected thereto rotates, and cranking is performed. In this case, the starter motor 102
Is connected to the ring gear 106 arranged on the outer peripheral portion of the flywheel 100 having a large diameter,
The crankshaft 28 can be rotated with a small torque.

Next, by supplying gasoline to the cylinder head 26 and igniting it, the piston 44a
.About.44c are displaced in the cylinders 42a to 42c, and the crankshaft 28 rotates accordingly. The crankshaft 28 rotates the rotor 48 and the flywheel 100 of the motor generator M directly connected to it.

Here, when the clutch engaging operation is performed after the gears forming the transmission T are set to a predetermined gear ratio by the driver, the piston 132 forming the clutch mechanism C is driven and separated from the diaphragm spring 130. Displace in the direction you want to. Therefore, the diaphragm spring 130 is displaced following the piston 132, and the outer peripheral surface presses the pressure plate 124. As a result, the friction plates 122a and 122b that form the friction disc 112 are replaced by the pressure plate 1.
The transmission T and the internal combustion engine E are connected to each other via the rotor 48 of the motor generator M by being interposed between the flywheel 100 and the flywheel 100.

Therefore, when the internal combustion engine E and the transmission T are connected by the clutch mechanism C, the driving force is transmitted to the drive shaft 10 and the hybrid vehicle V is driven. Since the rotor 48 of the motor generator M, which is a relatively heavy object, is directly connected to the crankshaft 28, stable rotation is transmitted to the transmission T side.

Next, the case where the hybrid vehicle V is driven by the motor generator M will be described. In this case, electric power is stored in the first power storage unit 13 by the regenerative action during deceleration or idling of the internal combustion engine E, and the magnetic field generated thereby causes the rotor 48 and the flywheel 100 to rotate, and the clutch mechanism C and the transmission. The driving force is transmitted to the drive shaft 10 via T, and the hybrid vehicle V is driven. The driving force by the motor generator M can be simultaneously generated as an assisting force for the driving force by the internal combustion engine E.

Here, the motor generator M generates heat when supplied with a drive current, and since it is arranged close to the internal combustion engine E, it is heated to a considerably high temperature, resulting in a decrease in efficiency due to heat loss. Is concerned. However, the housing 46 that houses the motor generator M
Since the air bleeding mechanism 59 is disposed on the upper part of the, the generated heat is efficiently released to the outside.

That is, the heated air e in the housing 46 is assisted by the fins 58 and 60 provided on the rotor 48 to form an air bleeding mechanism 59 as shown in FIGS. 6A to 6C or 7A to 7C. Steps 65a, 65b and 67a, 6 of the pipe member 61 to the cap member 63
Since it is released to the outside through the gap of 7b, it is possible to efficiently dissipate heat from the motor generator M. In this case, by connecting the air bleeding mechanism 59 to the upstream side of the air cleaner of the intake system, warmed air e can be supplied to the intake system, and the combustion efficiency can be improved especially at low temperatures when the outside air temperature is low. Further effects such as can be expected.

Further, there is a concern that water may collect in the housing 46 due to dew condensation due to heating of the motor generator M or intrusion from the outside. However, this water can be easily discharged to the outside by the water draining mechanisms 69a and 69b provided in the lower part of the housing.

That is, the water in the housing 46 can be discharged to the outside by removing the bolts constituting the water draining mechanisms 69a and 69b periodically or as needed. By configuring the water draining mechanisms 69a and 69b to be the same as the air draining mechanism 59, it is possible to always drain water. Moreover, if the water draining mechanisms 69a and 69b have a labyrinth structure, it is possible to preferably avoid the situation where water and dust enter the housing 46 from the outside.

On the other hand, when the clutch is disengaged by the driver, the piston 132 is displaced toward the internal combustion engine E, and the outer peripheral surface of the diaphragm spring 130 is separated from the pressure plate 124, so that the pressure plate 124 is moved. The operation of sandwiching the friction plates 122a and 122b by the flywheel 100 and the flywheel 100 is released, and the coupled state between the internal combustion engine E or the motor generator M and the transmission T is released.

FIG. 8 shows another embodiment of the motor generator M. The same constituents as those shown in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted.

In this motor generator M, the ends of the coils 70 drawn out from the respective coil units 64 are directly connected by the connectors 138a to 138c. Then, the connectors 138a to 138c and the housing 4
6 is connected to the connector 90. In the connectors 138a to 138c, the coil 7
0 is partially exposed. Therefore, in order to maintain the insulating state, the insulating plate 140 is arranged on the internal combustion engine E side.

In the motor-generator M having such a structure, the air-bleeding mechanism 59 and the water-draining mechanisms 69a and 69b are similarly arranged above and below the housing 46 so that the motor-generator M can dissipate heat and drain water.

FIG. 9 shows a drive device for an automatic vehicle according to another embodiment. The same constituents as those shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.

A flywheel mechanism F is arranged between the motor generator M and the transmission T for an automatic vehicle. The flywheel mechanism F includes the rotor 4 of the motor generator M via the connecting plate 150.
8 and the drive plate 152 is mounted on the connection plate 150. A primary flywheel 156 having a ring gear 154 on its outer peripheral portion is connected to the connecting plate 150. A secondary flywheel 158 is arranged in parallel with the primary flywheel 156. Secondary flywheel 15
8 has a boss portion 160 in which a spline is formed, with which the shaft 136 of the transmission T is engaged, in the central portion. The primary flywheel 156 has the boss portion 1 described above.
It is supported by 60 through a bearing 162, and is connected to the secondary flywheel 158 by a torsion spring 164.

In the drive device constructed as described above, the internal combustion engine E and the transmission case 137 of the transmission T are connected by the tightening bolt B via the housing 46.

Therefore, after being cranked by the starter motor 102, the rotor 48 of the motor generator M is
By rotating the primary flywheel 156
Rotates, the rotation is transmitted to the secondary flywheel 158 via the torsion spring 164, and the rotation of the secondary flywheel 158 is transmitted to the transmission T via the shaft 136. The transmission T drives the automatic transmission mechanism according to the rotation speed of the shaft 136 to rotate the drive shaft 10. In this case, similarly to the motor generator M, the heat generated in the motor generator M is discharged to the outside from the air draining mechanism 59, and the water is discharged to the outside from the water draining mechanisms 69a and 69b.

[0045]

As described above, according to the hybrid vehicle drive device of the present invention, the heat of the motor generator connected to the internal combustion engine is released to the outside from the air bleeding mechanism provided in the housing of the motor generator. The water inside is drained to the outside from a water draining mechanism provided at the bottom of the housing. Therefore, the motor generator is not heated more than a predetermined value and can be efficiently driven. Also, because water does not collect in the housing,
The function does not deteriorate due to rust or the like.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a hybrid vehicle to which a hybrid vehicle drive device of the present embodiment is applied.

FIG. 2 is an external perspective view of the hybrid vehicle drive device of the present embodiment.

FIG. 3 is an external side view of the hybrid vehicle drive device of the present embodiment.

FIG. 4 is a side sectional view of the hybrid vehicle drive device of the present embodiment.

FIG. 5 is a partially cutaway configuration diagram of the motor generator viewed from the internal combustion engine side.

6A is a cross-sectional view of the air bleeding mechanism, FIG. 6B is a cross-sectional view of FIG. 6A seen from below, and FIG. 6C is a layout explanatory view of step portions.

FIG. 7 shows another configuration of the air bleeding mechanism.
7A is a cross-sectional view of the air bleeding mechanism, FIG. 7B is a cross-sectional view of FIG. 7A seen from below, and FIG. 7C is a layout explanatory view of step portions.

FIG. 8 is an explanatory diagram of a configuration of another motor generator viewed from the internal combustion engine side.

FIG. 9 is a side sectional view of a hybrid vehicle drive device of another embodiment.

[Explanation of symbols]

V ... Hybrid vehicle E ... Internal combustion engine M ... Motor generator C ... Clutch mechanism T ... Transmission 10 ... Drive shaft 12 ... Motor drive circuit 13 ... First power storage device 15 ... Second power storage device 16 ... Management control circuit 22 ... Oil pan 24 ... Cylinder Block 26 ... Cylinder head 28 ... Crank shaft 46 ... Housing 48 ... Rotor 50 ... Stator 58, 60 ... Fin 59 ... Air draining mechanism 64 ... Coil units 69a, 69b ... Water draining mechanism 100 ... Flywheel 108 ... Second partition 112 ... Friction disks 122a, 122b ... Friction plate 130 ... Diaphragm spring 132 ... Piston 136 ... Shaft

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI F02D 29/02 F02D 29/02 D H02K 5/10 H02K 5/10 B (56) Reference JP-A-8-37752 (JP, A) JP-A-9-224345 (JP, A) JP-A-8-126243 (JP, A) JP-A-7-7880 (JP, A) JP-A-6-351188 (JP, A) Special Table 2000- 505377 (JP, A) International Publication 97/31767 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60L 15/00 B60K 6/04 B60L 11/14 H02K 5/10 F02D 29 / 02 B60K 17/04

Claims (4)

(57) [Claims] 1. A hybrid vehicle drive device comprising an internal combustion engine and a motor generator as a drive source for traveling, and outputting the driving force of the internal combustion engine and / or the motor generator to a drive shaft via a transmission. a housing for accommodating, is formed in the housing, inside and outside of the housing
And air vent mechanism ing and the structure constantly communicating section is formed in the lower portion of the housing, of the housing
Or a labyrinth structure that connects the parts to the outside
The hybrid vehicle driving apparatus characterized by comprising: a drain mechanism ing from standing bolt, a. 2. An internal combustion engine and a motor as a driving source for traveling.
The internal combustion engine and / or
Or the drive force from the motor generator is transmitted.
Hybrid vehicle that outputs to a drive shaft via an option
In the driving device, comprising a housing for housing the motor-generator, the air vent mechanism formed in the housing, the drain mechanism formed in the lower portion of the housing, wherein the motor generator, the stator and off
At least the air bleeding mechanism in the air bleeding mechanism and the water draining mechanism.
Is a labyrinth structure that communicates the inside and the outside of the housing with each other. 3. An internal combustion engine and a motor as a driving source for traveling.
The internal combustion engine and / or
Or the drive force from the motor generator is transmitted.
Hybrid vehicle that outputs to a drive shaft via an option
In the driving device, comprising a housing for housing the motor-generator, the air vent mechanism formed in the housing, the drain mechanism formed in the lower portion of the housing, wherein the air vent mechanism, intake system air Cree
A hybrid characterized by being connected to the upstream side of
Vehicle drive. 4. The apparatus according to claim 1 or 2 , wherein the labyrinth structures are arranged in a staggered manner on an inner peripheral portion of a cap member attached to a pipe line communicating between the inside and the outside of the housing. A hybrid vehicle drive device comprising a step portion, and a passage formed between the plurality of step portions communicates the inside and the outside of the housing.