JP2000125412A - Hybrid vehicle driving equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid vehicle driving equipment which has a simple, reliable, and easy-to-maintain structure and can produce strong backward torque while restricting the reverse rotation of an engine. SOLUTION: A first rotary machine 110 electromagnetically transmits torque from an output shaft 2 of an engine to a vehicle driving shaft 115 and converts all or part of engine torque to electric energy. A second rotary machine 120 has an electromagnetic transmission and reception of torque with the vehicle driving shaft 115. Furthermore, a rotation constraint mechanism 101 constrains a flywheel 102. Due to this structure, the first rotary machine 110 can output enough backward torque to the vehicle driving shaft 115 even during the backward traveling and there is no reverse rotation of an engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a drive device for a hybrid vehicle.

[0002]

2. Description of the Related Art A drive device for a hybrid vehicle including an engine, a power storage means, a power transmission means for transmitting energy between the engine and the power storage means and a vehicle drive shaft, and a control means for controlling the power transmission means is particularly known. It is known from Japanese Unexamined Patent Publication No. Hei 9-46966 and Japanese Unexamined Patent Publication No. Hei 10-42600.

In the driving apparatus for a hybrid vehicle according to these publications, the power transmission means transmits electromagnetic torque from the output shaft of the engine to the vehicle drive shaft and converts a part or all of the engine torque into electric energy. The vehicle includes a first rotating electric machine and a second rotating electric machine that transmits and receives electromagnetic torque to and from a vehicle drive shaft. Furthermore, the former publication proposes locking the engine because a problem arises in that the reverse rotation of the engine output shaft occurs when a reverse torque is applied to the vehicle drive shaft by the first rotating electric machine.

[0004]

However, the former configuration does not specifically disclose the configuration and position of the lock of the engine, and does not disclose any problems associated with the lock. Further, in the latter publication, there is a problem that a reverse torque exceeding the friction of the engine cannot be generated because the lock mechanism is not provided.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a simple, reliable, and highly maintainable structure, and can generate a strong reverse torque while restricting reverse rotation of an engine. Its purpose is to provide a vehicle drive.

[0006]

In the driving apparatus for a hybrid vehicle according to the present invention, the first rotating electric machine transmits electromagnetic torque from the output shaft of the engine to the driving shaft of the vehicle and reduces the engine torque. A part or the whole is converted into electric energy, and the second rotating electric machine exchanges electromagnetic torque with the vehicle drive shaft. In the apparatus according to the first aspect of the present invention, the rotation restricting mechanism restricts the flywheel, so that the first rotating electric machine can output a sufficient reverse torque to the vehicle drive shaft even when the vehicle is traveling backward, and furthermore, the engine can be operated unexpectedly. There is no rotation escape by itself.

Further, as compared with the case where the rotation restraining mechanism is provided at another part, the mounting, inspection and repair can be performed extremely easily. In particular, since the flywheel has a significantly larger diameter than other rotating parts, the binding force required to generate the required binding torque can be significantly reduced. This means that simplification of the mechanism, reduction in physique and cost due to reduction in rigidity and strength can be achieved without impairing the reliability of each part of the rotation restraining mechanism.

Further, in the apparatus according to the second aspect, the rotation restricting mechanism restricts the input shaft of the first rotating electric machine during the reverse traveling, so that the first rotating electric machine can supply a sufficient reverse torque even during the reverse traveling. Can output to axis. . Further, the rotation restricting mechanism restricts a portion of the input shaft of the first rotating electric machine connected to the output shaft of the engine, which protrudes from the housing of the first rotating electric machine to the engine side. As compared with the case where other parts, for example, a rotating part inside the housing of the first rotating electrical machine, are restrained, its installation, inspection and repair can be made extremely simple.

Further, in this configuration, since the restraint is performed on the first rotating electric machine side, the output shaft of the engine and the first rotating shaft are compared with the case where the output shaft of the engine and the flywheel fixed thereto are restrained. For example, due to play in a connection portion such as a spline mechanism connecting the input shaft of the electric machine or a damper mechanism built in the flywheel,
It is possible to prevent the driving feeling from deteriorating due to rattling at the portion of the spline mechanism every time a change in the vehicle driving torque or a change in the torque distribution ratio between the two rotating electric machines.

In the hybrid vehicle device according to the third aspect, the first rotating electric machine can output a sufficient reverse torque to the vehicle drive shaft even during reverse travel. Further, in this configuration, since the operation of the rotation restraining mechanism is controlled based on the shift position output from the shift sensor, it is possible to easily and safely increase the reverse torque during the reverse travel.
According to a fourth aspect of the present invention, in the hybrid vehicle driving device according to the third aspect, the operation of the rotation restricting mechanism is further prohibited when the shift position is at the parking position.

With this configuration, the rotation of the engine is not restricted when the engine is operating in a parking state for charging the power storage means, and the rotation restricting mechanism is damaged or the power storage means is charged. There is no interruption of engine drive. According to the fifth aspect of the present invention, in the hybrid vehicle drive device according to the third aspect, the rotation restricting mechanism is further activated when it is detected that the shift position is in the reverse position and the engine is not rotating. Permitting, and prohibits the operation of the rotation restricting mechanism when it is detected that the shift position is at the reverse position and the engine is rotating.

With this configuration, when the engine is required to rotate for charging the power storage means even though the shift position is the reverse position, the rotation of the engine is restricted by the rotation restricting mechanism. Therefore, there is no possibility that the rotation restraining mechanism is damaged or the driving of the engine for charging the power storage means is hindered. In the device described in claim 6, the first rotating electric machine can output a sufficient reverse torque to the vehicle drive shaft even during reverse travel. Further, in this configuration, even when the vehicle is backing up, the engine can continue to operate for charging the power storage means, further generate a large reverse torque due to the restraint of the rotation restraining mechanism, and if necessary, operate the power storage means. A charging function can be provided even during reverse running so that the power storage level is rapidly lowered to prevent overdischarge.

According to a seventh aspect of the present invention, in addition to the configuration of the sixth aspect, even when the amount of power stored in the power storage means is less than a predetermined value, when the predetermined release signal is input, the rotation of the rotation restricting mechanism is restricted. Therefore, for example, even if a sudden occurrence that requires an urgent reverse traveling with a strong torque occurs, it can be dealt with.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a drive apparatus for a hybrid vehicle according to the present invention will be described with reference to the following embodiments.

[0015]

Embodiment 1 An embodiment of a drive device for a hybrid vehicle according to the present invention will be described below with reference to FIGS. FIG. 1 shows an electric system diagram of the driving device, FIG. 2 shows a schematic sectional view of the driving device, and FIG. 3 shows a schematic side view of a rotation restricting mechanism of the driving device shown in FIG. (Overall Configuration) In FIG. 1, 1 is an internal combustion engine (engine), 2 is an output shaft of the internal combustion engine 1, 3 is an intake pipe, 4 is a fuel injection valve, 5 is a throttle valve, 6 is intake air amount adjusting means,
7 is an accelerator sensor, 8 is a brake sensor, 9 is a shift position sensor, 10 is power transmission means, and the power transmission means 10 is the first rotating electric machine 1010 and the second rotating electric machine 1
020.

Reference numeral 11 denotes a differential device, 12 denotes wheels, 13 denotes an internal combustion engine control device, 14 denotes a driving device for the first rotating electric machine 1010 and the second rotating electric machine 1020, 15 denotes a power storage device comprising a battery, and 16 denotes a hybrid. Control device, 17 is S
It is an OC meter. The engine (internal combustion engine) 1, the power transmission means 10, the power storage device (power storage means) 15, the internal combustion engine control device 13, the drive device 14, and the hybrid control device (control means) 16 constitute a drive device of a hybrid vehicle.

The composite motor 100 and the rotation restricting mechanism 101 shown in FIG. 2 constitute the above-described power transmission means 10, and the composite motor 100 includes a first rotating electric machine 110 and a second rotating electric machine 120. The first rotating electric machine 110 is rotatably held by a housing 111 and has an output shaft 2 of the engine 1.
An input shaft 112 connected to the input shaft 112 by spline coupling, an inner rotor 113 fitted and fixed to the input shaft 112, and an outer rotor 114 rotatably held by the housing 111 facing the outer peripheral surface of the inner rotor 113. A three-phase coil on the inner rotor 113, a synchronous rotating electric machine provided with permanent magnet magnetic poles on the inner peripheral surface side of the outer rotor 114,
The three-phase coil is supplied with a three-phase AC voltage from a driving device 14 through a slip ring device (not shown).

The second rotating electric machine 120 includes a housing 11
A stator 121 fixed to the inner peripheral surface of the outer rotor 114 and facing the outer peripheral surface of the outer rotor 114; and a synchronous motor having a permanent magnet magnetic pole provided on the outer peripheral surface side of the outer rotor 114. It consists of a rotating electric machine. The three-phase coil wound around the stator 121 is supplied with a three-phase AC voltage from the driving device 14. The outer rotor 114 has an output shaft 115
, And is connected to a differential device 11 including a reduction gear mechanism through an output shaft 115.

The internal combustion engine control device 13 stores a fuel efficiency map of the internal combustion engine 1 and determines an engine operating point at which the internal combustion engine 1 has the highest efficiency based on the received engine power demand value and the fuel efficiency map. Then, an intake air amount (engine torque required value) and an engine speed required value corresponding to the engine operating point are determined. Further, the internal combustion engine control device 13 controls the throttle valve opening based on the determined intake air amount and transmits an engine speed request value to the hybrid control device 16. Further, the internal combustion engine control device 13 drives an electronically controlled fuel injection device mounted on the internal combustion engine 1 to execute fuel injection control, and also executes known ignition control.

The drive device 14 is a hybrid control device 1
6 to control the field direction of the first rotating electric machine 110 and the second rotating electric machine 120 and to control the current in the direction orthogonal thereto based on the torque request values of the first and second rotating electric machines received from the first and second rotating electric machines. Generate torque according to both torque requirements. The hybrid control device 16 calculates an engine power power required value based on vehicle operation information input from the accelerator sensor 7, the brake sensor 8, the shift position sensor 9, and a vehicle speed from a vehicle speed sensor (not shown), This is transmitted to the engine control device 13. Further, the hybrid control device 16 controls both rotors of the first rotating electric machine 110 transmitted from the driving device 14 to perform the rotation speed control of the first rotating electric machine 110 so as to satisfy the received engine rotation speed request value. Based on the rotational angular velocity difference
Calculates the required torque value of the rotating electric machine 110 of the driving device 1
Command 4 Further, the hybrid control device 16 calculates a required torque value of the second rotating electric machine 120 from a difference between the required driving torque value of the vehicle and the required torque value of the first rotating electric machine 110, and outputs it to the driving device 14. I do. (Structure of the rotation restricting mechanism 101)
Flywheel 1 fixed to output shaft 2 of engine 1
02 and a ratchet mechanism 104 provided so as to be able to lock the convex 103
And the solenoid 10 for operating the ratchet mechanism 104
5, the ratchet mechanism 104 is normally separated from the convex portion 103 by a spring (not shown). However, when the solenoid 105 is operated by energization, the solenoid 105
Presses the stepped contact portion 106 of the ratchet mechanism 104 against the outer peripheral surface of the flywheel 102, whereby the stepped contact portion 106 is locked to the projection 103, and the rotation of the flywheel 102 is prohibited. When the energization of the solenoid 105 is stopped, the locking is released by the bias of the spring, and the rotation restriction of the flywheel 102 is released. (Forward running mode) In the forward running mode, the torque of the engine 1 is electromagnetically transmitted from the inner rotor 113 of the first rotating electric machine 110 to the outer rotor 114, and in some cases, the coil of the inner rotor 113 is connected to the power generating coil. As a result, the engine torque is absorbed by the battery 15. Furthermore, the second
The rotary electric machine 120 adjusts the excess and deficiency between the engine torque and the required vehicle drive torque by transferring power with the battery 15. (Reverse drive mode) In the reverse drive mode, the outer rotor 1
It is necessary to rotate 14 in reverse. However, since the rotation direction of the engine 1 is one direction, it is theoretically impossible to use the engine torque at the time of reversing. In this case,
The reverse torque is generated by the electric power supplied from the battery 15 to the first rotating electric machine 110 and the second rotating electric machine 120. More specifically, by energizing the coil of the inner rotor 113 and the coil of the stator 121, the outer rotor 114 is rotated in the backward direction.

However, when the inner rotor 113 is energized in the backward direction, the inner rotor 113, that is, the engine 1 is driven in the forward rotation direction by the reaction of the driving torque generated in the outer rotor 114, and the rotation is generated. Therefore, the first rotating electric machine 110 can generate the reverse torque only in a range where the engine does not rotate, that is, in a range where the engine does not rotate due to the static friction force of the engine 1. Thus, in the related art, the first rotating electric machine 110 can hardly generate the reverse torque, and the reverse running is performed only by the torque by the second rotating electric machine 120.

However, in the present embodiment, the rotation of the engine 1 is prevented by operating the rotation restricting mechanism 101 during the reverse running, so that the first rotary electric machine 110 can generate a large reverse torque, Reverse running with much higher torque is realized. (Modification) In the above embodiment, the convex portion 103 is provided on the outer peripheral surface of the flywheel 102. However, it is of course possible to lock the outer peripheral portion of the end surface of the flywheel 102. (Modification) In the above embodiment, the ratchet mechanism 104 is engaged with the convex portion 103 on the outer peripheral surface of the flywheel 102. However, it is of course possible to press the shoe with high frictional resistance and restrict the rotation by the frictional force. . (Modification) In the above embodiment, the ratchet mechanism 104 is engaged with the projection 103 on the outer peripheral surface of the flywheel 102. However, as shown in FIG. A rotation restriction mechanism 101 'may be provided. (Control 1 of Rotation Constraint Mechanism) A control method of the above-described rotation constraint mechanism 101 performed by the hybrid control device 16 will be described below with reference to a flowchart shown in FIG.

First, a shift switch (shift sensor) 9
The shift position is read from (S100). Next, SOC
The remaining battery capacity is read from the output signal of the meter 17, the engine speed is read from the internal combustion engine controller 13 (S102), and it is checked whether the shift position is the parking position or the reverse position (S104). It is checked whether the remaining capacity is at a level requiring replenishment by the engine 1 or whether the engine is rotating (S106). If so, the output signal of the SOC meter 17 indicates whether the remaining battery capacity is less than a predetermined value. It is checked whether it is (S108), and if not, a command is issued to the rotation restraining mechanism 101 to restrain it.

In S108, if the remaining battery charge is less than the predetermined value, it is checked whether the driver has operated a powerful reverse travel button (not shown) (S110). Command (S1
14) If not, the restricting operation by the rotation restricting mechanism 101 is prohibited (S112). On the other hand, if the shift position is not the retreat position in S104, and if the engine is rotating or there is no request to rotate the engine in S106, restraint by the restraint mechanism 101 is prohibited.

According to the control of the rotation restricting mechanism of this embodiment,
The rotation restricting mechanism 101 can function as a parking brake during parking. Further, when the remaining capacity of the battery 15 is small (S108) despite the function of the parking brake, the restraining operation of the rotation restraining mechanism 101 is released (S114), and the engine is started to charge the battery 15. It can be carried out.

[Brief description of the drawings]

FIG. 1 is an electrical diagram of a drive device for a hybrid vehicle according to a first embodiment.

FIG. 2 is a schematic diagram of the driving device of FIG.

FIG. 3 is a schematic side view of a rotation restricting mechanism of the driving device shown in FIG.

FIG. 4 is a schematic view showing a rotation restricting mechanism according to another embodiment.

FIG. 5 is a flowchart showing a control operation of the rotation restricting mechanism of the control device of FIG. 1;

[Explanation of symbols]

1 is an engine, 10 is power transmission means, 15 is power storage means,
16 is a control means, 2 is an output shaft of the engine 1, 101 is a rotation restricting mechanism, 102 is a flywheel, 110 is a first rotating electric machine, 112 is an input shaft of the first rotating electric machine, and 120 is a second rotating electric machine. , 9 are shift switches (shift sensors)

Continued on front page F-term (reference) 3D039 AA03 AB27 AC21 AD11 AD53 5H115 PA08 PA12 PC06 PG04 PI16 PI22 PI29 PO02 PO17 PU10 PU24 PU25 QE13 QI04 QN03 RB11 RB26 RE02 RE03 RE05 RE06 SE05 TB01 TE02 TI02 TO21 TO23 TO30 UI32 5H607 A00 BB18 CC05 DD03 FF01 FF24

Claims (7)

[Claims] An engine, power storage means, power transmission means for transmitting energy between the engine and the power storage means and a vehicle drive shaft, and control means for controlling the power transmission means; A first rotating electrical machine that transmits electromagnetic torque from an output shaft of the engine to the vehicle drive shaft and converts a part or all of the engine torque into electric energy; A hybrid vehicle drive device comprising: a second rotary electric machine that transmits and receives torque; a hybrid vehicle having a rotation restricting mechanism that restricts a flywheel fixed to an output shaft of the engine during a reverse travel. Drive. 2. The power transmission means, comprising: an engine; power storage means; power transmission means for transmitting energy between the engine and the power storage means and a vehicle drive shaft; and control means for controlling the power transmission means. A first rotating electrical machine that transmits electromagnetic torque from an output shaft of the engine to the vehicle drive shaft and converts a part or all of the engine torque into electric energy; A drive device for a hybrid vehicle, comprising: a second rotating electric machine that transmits and receives torque; a drive device for a hybrid vehicle, comprising: a housing of the first rotating electric machine among an input shaft of the first rotating electric machine connected to an output shaft of the engine; A drive system for a hybrid vehicle, comprising: a rotation restraining mechanism for restraining a portion protruding toward the engine during reverse travel. 3. The power transmission means, comprising: an engine; power storage means; power transmission means for transmitting energy between the engine and the power storage means and a vehicle drive shaft; and control means for controlling the power transmission means. A first rotating electrical machine that transmits electromagnetic torque from an output shaft of the engine to the vehicle drive shaft and converts a part or all of the engine torque into electric energy; A drive device for a hybrid vehicle including: a second rotating electric machine that transmits and receives torque; and a rotation restraining mechanism that restrains an output shaft of the engine during a reverse travel directly or via another member; Is a driving device for a hybrid vehicle, wherein the operation of the rotation restricting mechanism is controlled based on a shift position output from a shift sensor. 4. The drive system for a hybrid vehicle according to claim 3, wherein said control device inhibits operation of said rotation restraining mechanism when said shift position is at a parking position. apparatus. 5. The drive device for a hybrid vehicle according to claim 3, wherein the control device controls the rotation of the rotation restraining mechanism when the shift position is at the reverse position and the engine is not rotating. A drive device for a hybrid vehicle, wherein operation of the hybrid vehicle is permitted, and operation of the rotation restricting mechanism is prohibited when it is detected that the shift position is at the reverse position and the engine is rotating. 6. An engine, a power storage means, a power transmission means for transmitting energy between the engine and the power storage means and a vehicle drive shaft, and a control means for controlling the power transmission means, wherein the power transmission means A first rotating electrical machine that transmits electromagnetic torque from an output shaft of the engine to the vehicle drive shaft and converts a part or all of the engine torque into electric energy; A drive device for a hybrid vehicle including: a second rotating electric machine that transmits and receives torque; and a rotation restraining mechanism that restrains an output shaft of the engine during a reverse travel directly or via another member; Is a driving device for a hybrid vehicle, wherein the restraint of the rotation restraining mechanism is prohibited when the charged amount of the power storage means is less than a predetermined value. 7. The driving device for a hybrid vehicle according to claim 6, wherein the control device is configured to control the rotation of the vehicle when a predetermined release signal is input, even when the amount of power stored in the power storage unit is less than a predetermined value. A drive device for a hybrid vehicle, wherein a drive of a restraint mechanism is performed.