JP4020888B2 - POWER OUTPUT DEVICE, AUTOMOBILE MOUNTED WITH THE SAME, CONTROL METHOD AND DRIVE DEVICE FOR POWER OUTPUT DEVICE - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a condition in which an engine cannot be started while receiving a reaction force of a drive shaft by a motor. <P>SOLUTION: An automobile is provided with a mechanical pump driven by an engine 22 and an electric driven pump 92 as pumps for generating hydraulic pressure used for actuating a transmission gear 60 to transmit a power from a motor MG2 to a ring gear shaft 32a. When temperature of the electric driven pump 92 reaches a tolerance temperature, start of the engine 22 is banned. When the temperature is lower than the tolerance temperature, the engine 22 is stopped according to its temperature rise, and motor traveling by the motor MG2 is banned. Assist drive of the electric driven pump 92 at the time of changing the speed of the transmission gear 60 during operation of the engine 22 is banned. Therefore, a driving frequency of the electric driven pump 92 becomes small, the temperature can be avoided from reaching the tolerance temperature, and such a condition can be prevented that the power from the motor MG2 for receiving the reaction force of the drive shaft cannot be transmitted and the engine 22 cannot be started. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a power output device, a vehicle equipped with the power output device, a control method for the power output device, and a drive device, and more particularly, a power output device that outputs power to a drive shaft and the drive shaft connected to the axle. The present invention relates to a method of controlling a motor vehicle and a power output device, and a drive device that inputs power from an internal combustion engine and outputs power to a drive shaft.

Conventionally, as this type of power output device, an engine crankshaft, a rotation shaft of a first motor generator, and a drive shaft are connected to three rotation elements of a planetary gear mechanism, and a drive shaft is connected via a transmission. The thing mounted in the hybrid vehicle to which the 2nd motor generator was connected is proposed (refer patent document 1). In this device, the power from the second motor generator is converted into one corresponding to the vehicle speed by selectively switching the gear stage of the transmission between a high state and a low state according to the vehicle speed, and the drive shaft Is output.
JP 2002-225578 A

  In such a power output device, when the engine is started, if the engine is cranked by the first motor generator while receiving the reaction force on the drive shaft side by the second motor generator, the torque shock of the drive shaft due to cranking can be suppressed. it can.

  By the way, a mechanical pump driven by an engine as a pump for generating hydraulic pressure when a hydraulic actuator is used as an actuator for operating a transmission, and an electric pump driven by receiving power supply from a battery or the like In this type of power output apparatus, even when the engine is stopped, the transmission is operated by driving the electric pump to transmit the power from the second motor generator to the drive shaft. Therefore, the reaction force of the drive shaft can be handled by the second motor generator, and the engine can be started using the method described above. However, depending on the state of the electric pump such as a high temperature state, the driving thereof is limited, and there is a case where sufficient hydraulic pressure cannot be generated. In this case, since power cannot be transmitted by the transmission, the second motor generator cannot handle the reaction force on the drive shaft side, so that torque shock occurs when the engine is started. Therefore, it is desirable to appropriately manage the state of the electric pump so that such a case does not occur.

  It is an object of the present invention to provide a power output apparatus, an automobile equipped with the power output apparatus, a control method for the power output apparatus, and a drive apparatus that prevent an internal combustion engine from being started using a reaction force that is handled by an electric motor. The power output device of the present invention, a vehicle equipped with the power output device, a control method for the power output device, and a drive device are more suitable for the state of an electric hydraulic pressure generator that generates a hydraulic pressure in a transmission such as a transmission. One of the purposes is to maintain it.

  The power output device, the power output device, the automobile equipped with the power output device, and the control method for the power output device according to the present invention employ the following means in order to achieve at least a part of the above-described object.

The first power output device of the present invention comprises:
A power output device that outputs power to a drive shaft,
An internal combustion engine;
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is executed to limit the starting of the internal combustion engine by the starting means accompanied by the driving of the electric hydraulic pressure generating means. When the detected state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the shift transmission means with the driving of the electric hydraulic pressure generating means The gist of the present invention is to provide a restriction control means for executing a second restriction control for restricting a change in the gear ratio.

  In the first power output apparatus of the present invention, an electric hydraulic pressure generating means for generating a hydraulic pressure for operating a speed change transmission means for transmitting power between the rotating shaft and the drive shaft of the motor with a changeable gear ratio. When the state reaches the first state, the start of the internal combustion engine by the start means for starting the internal combustion engine using the reaction force on the drive shaft side which is handled by the electric motor with the drive of the electric hydraulic pressure generating means is limited. When the electric hydraulic pressure generating means reaches the second state before the electric oil pressure generating means reaches the first state, the gear ratio by the transmission transmission means that drives the electric hydraulic pressure generating means is reached. The second restriction control for restricting the change is executed. Therefore, when the state of the electric hydraulic pressure generating means reaches the second state before reaching the first state, the load of the electric hydraulic pressure generating means is reduced by limiting the speed ratio, so that deterioration of the state is suppressed. can do. As a result, the state of the electric hydraulic pressure generating means can be maintained in an appropriate state, and the state of the electric hydraulic pressure generating means reaches the first state and prevents the internal combustion engine from being unable to start using the reaction force handled by the motor. it can. Here, “start limit” includes prohibition of start, and “limit change of speed ratio” includes prohibition of change of speed ratio (the same applies hereinafter).

  In such a first power output apparatus of the present invention, the shift transmission means during the normal operation of the internal combustion engine when the detected state of the electric hydraulic pressure generating means does not reach the second state. When the change of the gear ratio is instructed, the transmission of the gear change is performed so that the instructed gear ratio is changed using the hydraulic pressure generated by the mechanical hydraulic pressure generating means and the hydraulic pressure generated by the electric hydraulic pressure generating means. A normal speed control means for controlling the driving of the means, and the limit control means is instructed to change the speed ratio of the speed change transmission means while the internal combustion engine is operating as the second limit control. When the electric hydraulic pressure generating means is stopped, the shift transmission means is driven and controlled to be changed to the instructed gear ratio by the hydraulic pressure generated by the mechanical hydraulic pressure generating means. It can be assumed to be unit. In this way, the gear ratio can be changed using the hydraulic pressure generated by the mechanical hydraulic pressure generating means driven by the internal combustion engine while stopping the electric hydraulic pressure generating means and suppressing the deterioration of the state.

  In the first power output apparatus of the present invention, the limit control means has reached a third state as a state before the detected state of the electric hydraulic pressure generating means reaches the second state. At this time, it may be a means for executing third restriction control for restricting the operation stop of the internal combustion engine. In this way, since the hydraulic pressure from the mechanical hydraulic pressure generating means driven by the internal combustion engine can be used, the burden on the electric hydraulic pressure generating means can be reduced, and deterioration of the state can be suppressed. Here, “restriction of operation stop” includes prohibition of operation stop (hereinafter the same).

The second power output device of the present invention is:
A power output device capable of outputting power to a drive shaft,
An internal combustion engine;
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is performed to limit the start of the internal combustion engine by the starting means, and the detected electric hydraulic pressure is generated. Limiting control means for executing third limiting control for limiting operation stop of the internal combustion engine when the state of the means reaches a third state as a state before reaching the first state. The gist.

  In the second power output device of the present invention, the electric hydraulic pressure generating means for generating the hydraulic pressure for operating the speed change transmission means for transmitting the power between the rotating shaft and the drive shaft of the motor with a changeable gear ratio. When the state reaches the first state, the start of the internal combustion engine by the starting means for starting the internal combustion engine using the reaction force on the drive shaft side which is handled by the electric motor as the electric hydraulic pressure generating means is driven is limited. When the state of the electric hydraulic pressure generating means reaches the third state as the state before reaching the first state, the third restriction control for restricting the operation stop of the internal combustion engine is executed. To do. Therefore, when the state of the electric hydraulic pressure generating means reaches the third state before reaching the first state, the mechanical hydraulic pressure generating means is driven by the restriction of the stoppage of the operation of the internal combustion engine. Since the burden is reduced, the deterioration of the state can be suppressed. As a result, the state of the electric hydraulic pressure generating means can be maintained in an appropriate state, and the state of the electric hydraulic pressure generating means reaches the first state and prevents the internal combustion engine from being unable to start using the reaction force handled by the motor. it can.

  In the first or second power output apparatus of the present invention, the state detecting means may be a temperature detecting means for detecting the temperature of the electric hydraulic pressure generating means. Here, in each aspect of the first or second power output device of the present invention described above, the second temperature as the second state is lower than the first temperature as the first state. Also, the third temperature as the third state may be lower than the first temperature as the first state. In addition, the third temperature may be lower than the second temperature.

  In the first or second power output device of the present invention, the output shaft of the internal combustion engine, the drive shaft, and a third rotating shaft are connected to three axes, and input / output is performed on any two of the three axes. A three-axis power input / output means for determining the power input / output to / from the remaining one shaft when the power to be driven is determined, and a rotary shaft motor capable of inputting / outputting power to / from the third rotary shaft; The starting means may be a means having the electric motor for the rotating shaft, or connected to the driving shaft and a first rotor connected to the output shaft of the internal combustion engine. A counter-rotor motor that has a second rotor and drives the first rotor and the second rotor to rotate relative to each other by electromagnetic action. It can also be a means having a counter-rotor motor.

The automobile of the present invention
A power output apparatus according to the present invention, that is, basically a power output apparatus that outputs power to a drive shaft, wherein the electric motor has an internal combustion engine, an electric motor that can generate electric power, and a gear ratio that can be operated and changed by hydraulic pressure. Shift transmission means for transmitting power between the rotary shaft and the drive shaft, mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure, and driven by receiving electric power to generate the hydraulic pressure Electric hydraulic pressure generating means, starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor, state detecting means for detecting the state of the electric hydraulic pressure generating means, and the detected When the state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is executed to limit the start of the internal combustion engine by the starting means accompanied by the driving of the electric hydraulic pressure generating means. When the state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the change of the gear ratio by the shift transmission means accompanying the driving of the electric hydraulic pressure generating means is limited. A power output device including a limit control means for executing the second limit control, or a power output device capable of outputting power to the drive shaft, which is operated by an internal combustion engine, an electric motor capable of generating power, and hydraulic pressure. Transmission transmission means for transmitting power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio, mechanical hydraulic pressure generation means for generating the hydraulic pressure driven by the internal combustion engine, and receiving power supply The state of the electric hydraulic pressure generating means, the electric hydraulic pressure generating means for generating the hydraulic pressure, the starting means for starting the internal combustion engine using the reaction force on the side of the drive shaft that is handled by the electric motor, A state detecting means for outputting, and when the detected state of the electric hydraulic pressure generating means reaches the first state, a start of the internal combustion engine by the starting means accompanied by driving of the electric hydraulic pressure generating means is limited. A third control is executed to restrict the stop of the operation of the internal combustion engine when the limit control of 1 is executed and the detected state of the electric hydraulic pressure generating means reaches the third state as the state before reaching the first state. And a power output device including a limiting control means for executing the limiting control, and the driving shaft is connected to the axle for traveling.

  Since the vehicle according to the present invention includes the first or second power output device of the present invention according to any one of the above-described aspects, the same effect as the power output device of the present invention, for example, an electric type The effect of maintaining the state of the hydraulic pressure generating means in a more appropriate state, the effect of preventing the state of the electric hydraulic pressure generating means from reaching the first state and preventing the internal combustion engine from being started using the reaction force that is handled by the motor, etc. Can be played.

The first drive device of the present invention comprises:
A drive device that inputs power from an internal combustion engine and outputs power to a drive shaft,
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is executed to limit the starting of the internal combustion engine by the starting means accompanied by the driving of the electric hydraulic pressure generating means. When the detected state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the shift transmission means with the driving of the electric hydraulic pressure generating means The gist of the present invention is to provide a restriction control means for executing a second restriction control for restricting a change in the gear ratio.

  In the first drive device of the present invention, the state of the electric hydraulic pressure generating means for generating the hydraulic pressure for operating the shift transmission means for transmitting the power between the rotating shaft and the drive shaft of the motor with a changeable gear ratio. When the engine reaches the first state, the start of the internal combustion engine by the starting means for starting the internal combustion engine using the reaction force on the drive shaft side which is handled by the electric motor with the driving of the electric hydraulic pressure generating means is limited. When the limit control is executed and the state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the speed ratio of the speed change transmission means by the drive of the electric hydraulic pressure generating means is changed. Second restriction control for restricting the change is executed. Therefore, when the state of the electric hydraulic pressure generating means reaches the second state before reaching the first state, the load of the electric hydraulic pressure generating means is reduced by limiting the speed ratio, so that deterioration of the state is suppressed. can do. As a result, the state of the electric hydraulic pressure generating means can be maintained in an appropriate state, and the state of the electric hydraulic pressure generating means reaches the first state and prevents the internal combustion engine from being unable to start using the reaction force handled by the motor. it can.

The second drive device of the present invention is:
A drive device that inputs power from an internal combustion engine and outputs power to a drive shaft,
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is performed to limit the start of the internal combustion engine by the starting means, and the detected electric hydraulic pressure is generated. Limiting control means for executing third limiting control for limiting operation stop of the internal combustion engine when the state of the means reaches a third state as a state before reaching the first state. The gist.

  In the second drive device of the present invention, the state of the electric hydraulic pressure generating means for generating the hydraulic pressure for operating the shift transmission means for transmitting the power between the rotating shaft and the drive shaft of the motor with a changeable gear ratio. When the engine reaches the first state, the start of the internal combustion engine by the starting means for starting the internal combustion engine using the reaction force on the drive shaft side that is handled by the electric motor as the electric hydraulic pressure generating means is driven is limited. The limit control is executed, and when the state of the electric hydraulic pressure generating means reaches the third state as the state before reaching the first state, the third limit control for limiting the operation stop of the internal combustion engine is executed. . Therefore, when the state of the electric hydraulic pressure generating means reaches the third state before reaching the first state, the mechanical hydraulic pressure generating means is driven by the restriction of the stoppage of the operation of the internal combustion engine. Since the burden is reduced, the deterioration of the state can be suppressed. As a result, the state of the electric hydraulic pressure generating means can be maintained in an appropriate state, and the state of the electric hydraulic pressure generating means reaches the first state and prevents the internal combustion engine from being unable to start using the reaction force handled by the motor. it can.

The control method of the first power output device of the present invention is:
An internal combustion engine, an electric motor capable of generating electricity, transmission transmission means for transmitting power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio operated by hydraulic pressure, and the hydraulic pressure driven by the internal combustion engine Mechanical hydraulic pressure generating means to be generated, electric hydraulic pressure generating means that is driven by receiving electric power to generate the hydraulic pressure, and start that starts the internal combustion engine using a reaction force on the drive shaft side that is handled by the electric motor A power output apparatus control method comprising:
(A) detecting the state of the electric hydraulic pressure generating means;
(B) a first restriction that restricts starting of the internal combustion engine by the starting means that is accompanied by driving of the electric hydraulic pressure generating means when the detected state of the electric hydraulic pressure generating means reaches the first state; When the control is executed and the detected state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the shift with the driving of the electric hydraulic pressure generating means is performed. The gist is to execute the second limiting control for limiting the change of the transmission gear ratio by the transmission means.

  According to the control method of the first power output apparatus of the present invention, the electric power for generating the hydraulic pressure for operating the shift transmission means for transmitting the power between the rotating shaft and the drive shaft of the motor with the changeable gear ratio. When the state of the hydraulic pressure generating means reaches the first state, the internal combustion engine is started by the starting means that starts the internal combustion engine using the reaction force on the drive shaft side that is handled by the electric motor with the drive of the electric hydraulic pressure generating means When the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, a shift with driving of the electric hydraulic pressure generating means is performed. Second restriction control for restricting the change of the gear ratio by the transmission means is executed. Therefore, when the state of the electric hydraulic pressure generating means reaches the second state before reaching the first state, the load of the electric hydraulic pressure generating means is reduced by limiting the speed ratio, so that deterioration of the state is suppressed. can do. As a result, the state of the electric hydraulic pressure generating means can be maintained in an appropriate state, and the state of the electric hydraulic pressure generating means reaches the first state and prevents the internal combustion engine from being unable to start using the reaction force handled by the motor. it can.

The control method of the second power output device of the present invention is:
An internal combustion engine, an electric motor capable of generating electricity, transmission transmission means for transmitting power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio operated by hydraulic pressure, and the hydraulic pressure driven by the internal combustion engine Mechanical hydraulic pressure generating means to be generated, electric hydraulic pressure generating means that is driven by receiving electric power to generate the hydraulic pressure, and start that starts the internal combustion engine using a reaction force on the drive shaft side that is handled by the electric motor A power output apparatus control method comprising:
(A) detecting the state of the electric hydraulic pressure generating means;
(B) a first restriction that restricts starting of the internal combustion engine by the starting means that is accompanied by driving of the electric hydraulic pressure generating means when the detected state of the electric hydraulic pressure generating means reaches the first state; When the control is executed and the detected state of the electric hydraulic pressure generating means reaches a third state as a state before reaching the first state, a third stop that restricts the operation stop of the internal combustion engine is performed. The gist is to execute the limit control.

  According to the control method of the second power output apparatus of the present invention, the electric power for generating the hydraulic pressure for operating the shift transmission means for transmitting the power between the rotating shaft and the drive shaft of the electric motor with the changeable gear ratio. When the state of the hydraulic pressure generating means reaches the first state, the internal combustion engine is started by the starting means that starts the internal combustion engine using the reaction force on the drive shaft side that is handled by the motor as the electric hydraulic pressure generating means is driven. When the electric hydraulic pressure generating means reaches the third state as the state before reaching the first state, the third restriction for restricting the operation stop of the internal combustion engine is executed. The limit control is executed. Therefore, when the state of the electric hydraulic pressure generating means reaches the third state before reaching the first state, the mechanical hydraulic pressure generating means is driven by the restriction of the stoppage of the operation of the internal combustion engine. Since the burden is reduced, the deterioration of the state can be suppressed. As a result, the state of the electric hydraulic pressure generating means can be maintained in an appropriate state, and the state of the electric hydraulic pressure generating means reaches the first state and prevents the internal combustion engine from being unable to start using the reaction force handled by the motor. it can.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 equipped with a power output apparatus as an embodiment of the present invention. As shown in the figure, the hybrid vehicle 20 of the embodiment includes an engine 22, a three-shaft power distribution / integration mechanism 30 connected to a crankshaft 26 as an output shaft of the engine 22 via a damper 28, and power distribution / integration. A motor MG1 capable of generating electricity connected to the mechanism 30, a motor MG2 connected to the power distribution and integration mechanism 30 via a transmission 60, and a hybrid electronic control unit 70 for controlling the entire drive system of the vehicle.

  The engine 22 is an internal combustion engine that outputs power using a hydrocarbon-based fuel such as gasoline or light oil, and an engine electronic control unit (hereinafter referred to as an engine ECU) that receives signals from various sensors that detect the operating state of the engine 22. ) 24 is subjected to operation control such as fuel injection control, ignition control, intake air amount adjustment control and the like. The engine ECU 24 is in communication with the hybrid electronic control unit 70, controls the operation of the engine 22 by a control signal from the hybrid electronic control unit 70, and, if necessary, transmits data related to the operating state of the engine 22 to the hybrid electronic control. Output to unit 70.

  The power distribution and integration mechanism 30 includes an external gear sun gear 31, an internal gear ring gear 32 arranged concentrically with the sun gear 31, a plurality of pinion gears 33 that mesh with the sun gear 31 and mesh with the ring gear 32, A planetary gear mechanism is provided that includes a carrier 34 that holds a plurality of pinion gears 33 so as to rotate and revolve, and that performs differential action using the sun gear 31, the ring gear 32, and the carrier 34 as rotational elements. In the power distribution and integration mechanism 30, the crankshaft 26 of the engine 22 is connected to the carrier 34, the motor MG1 is connected to the sun gear 31, and the transmission 60 is connected to the ring gear 32 via the ring gear shaft 32a. When functioning as a generator, power from the engine 22 input from the carrier 34 is distributed according to the gear ratio between the sun gear 31 side and the ring gear 32 side, and when the motor MG1 functions as an electric motor, the engine input from the carrier 34 The power from 22 and the power from the motor MG1 input from the sun gear 31 are integrated and output to the ring gear 32 side. The power output to the ring gear 32 is output from the ring gear shaft 32a to the drive wheels 39a and 39b via the gear mechanism 37 and the differential gear 38.

  Both the motor MG1 and the motor MG2 are configured as well-known synchronous generator motors that can be driven as generators and can be driven as motors, and exchange power with the battery 50 via inverters 41 and 42. The power line 54 connecting the inverters 41 and 42 and the battery 50 is configured as a positive and negative bus shared by the inverters 41 and 42, and the electric power generated by one of the motors MG 1 and MG 2 is supplied to another motor. It can be consumed at. Therefore, battery 50 is charged / discharged by electric power generated from motors MG1 and MG2 or insufficient electric power. Note that the battery 50 is not charged / discharged if the electric power balance is balanced by the motor MG1 and the motor MG2. The motors MG1 and MG2 are both driven and controlled by a motor electronic control unit (hereinafter referred to as a motor ECU) 40. The motor ECU 40 detects signals necessary for driving and controlling the motors MG1 and MG2, such as signals from rotational position detection sensors 43 and 44 that detect the rotational positions of the rotors of the motors MG1 and MG2, and current sensors (not shown). The phase current applied to the motors MG1 and MG2 to be applied is input, and a switching control signal to the inverters 41 and 42 is output from the motor ECU 40. The motor ECU 40 calculates the rotational speeds Nm1 and Nm2 of the rotors of the motors MG1 and MG2 and the rotational speed Nr of the ring gear shaft 32a by a rotational speed calculation routine (not shown) based on signals input from the rotational position detection sensors 43 and 44. Yes. The motor ECU 40 is in communication with the hybrid electronic control unit 70, controls the driving of the motors MG1 and MG2 by a control signal from the hybrid electronic control unit 70, and, if necessary, data on the operating state of the motors MG1 and MG2. Output to the hybrid electronic control unit 70.

  The transmission 60 connects and disconnects the rotating shaft 48 of the motor MG2 and the ring gear shaft 32a and reduces the rotational speed of the rotating shaft 48 of the motor MG2 to two stages by connecting the both shafts to the ring gear shaft 32a. It is configured to communicate. An example of the configuration of the transmission 60 is shown in FIG. The transmission 60 shown in FIG. 2 includes a double-pinion planetary gear mechanism 60a, a single-pinion planetary gear mechanism 60b, and two brakes B1 and B2. The planetary gear mechanism 60a of a double pinion includes an external gear sun gear 61, an internal gear ring gear 62 arranged concentrically with the sun gear 61, a plurality of first pinion gears 63a meshing with the sun gear 61, and the first pinion gear 63a. A plurality of second pinion gears 63b that mesh with the one pinion gear 63a and mesh with the ring gear 62, and a carrier 64 that holds the plurality of first pinion gears 63a and the plurality of second pinion gears 63b so as to rotate and revolve freely. The sun gear 61 can be freely rotated or stopped by turning on and off the brake B1. The single-pinion planetary gear mechanism 60 b includes an external gear sun gear 65, an internal gear ring gear 66 disposed concentrically with the sun gear 65, and a plurality of pinion gears 67 that mesh with the sun gear 65 and mesh with the ring gear 66. And a carrier 68 that holds a plurality of pinion gears 67 so as to rotate and revolve. The sun gear 65 is connected to the rotating shaft 48 of the motor MG2, the carrier 68 is connected to the ring gear shaft 32a, and the ring gear 66 is braked. The rotation can be freely or stopped by turning on and off B2. The double pinion planetary gear mechanism 60a and the single pinion planetary gear mechanism 60b are connected by a ring gear 62 and a ring gear 66, and a carrier 64 and a carrier 68, respectively. The transmission 60 can disconnect the rotating shaft 48 of the motor MG2 from the ring gear shaft 32a by turning off both the brakes B1 and B2, and can turn off the brake B1 and turn on the brake B2 to turn on the rotating shaft 48 of the motor MG2. Is rotated at a relatively large reduction ratio and transmitted to the ring gear shaft 32a (hereinafter, this state is referred to as the Lo gear state), the brake B1 is turned on and the brake B2 is turned off to turn the rotation shaft 48 of the motor MG2 off. The rotation is reduced at a relatively small reduction ratio and transmitted to the ring gear shaft 32a (hereinafter, this state is referred to as a Hi gear state). When the brakes B1 and B2 are both turned on, the rotation of the rotary shaft 48 and the ring gear shaft 32a is prohibited.

  The brakes B1 and B2 are operated by the hydraulic pressure from the hydraulic circuit 90 illustrated in FIG. As shown in the figure, the hydraulic circuit 90 includes a mechanical pump 91 driven by the rotational force of the engine 22, an electric pump 92 incorporating an electric motor (not shown), a three-way solenoid 93, a pressure control valve 94, a linear Solenoids 95a and 95b, control valves 96a and 96b, and accumulators 97a and 97b. The three-way solenoid 93 is driven to control the opening and closing of the pressure control valve 94 to control the mechanical pump 91 and the electric motor. The line hydraulic pressure from the pump 92 can be adjusted, and the linear solenoids 95a and 95b are driven and controlled to control the opening and closing of the control valves 96a and 96b, and the hydraulic pressure applied to the brakes B1 and B2 from the hydraulic line. Adjust it on Thereby making it possible to switch the off.

  The battery 50 is managed by a battery electronic control unit (hereinafter referred to as a battery ECU) 52. The battery ECU 52 receives signals necessary for managing the battery 50, for example, a voltage between terminals from a voltage sensor (not shown) installed between terminals of the battery 50, and a power line 54 connected to the output terminal of the battery 50. The charging / discharging current from the attached current sensor (not shown), the battery temperature from the temperature sensor (not shown) attached to the battery 50, and the like are input. Output to the control unit 70. The battery ECU 52 also calculates the remaining capacity (SOC) based on the integrated value of the charge / discharge current detected by the current sensor in order to manage the battery 50.

  The hybrid electronic control unit 70 is configured as a microprocessor centered on the CPU 72, and in addition to the CPU 72, a ROM 74 for storing processing programs, a RAM 76 for temporarily storing data, an input / output port and communication not shown. And a port. The hybrid electronic control unit 70 is provided with an ignition signal from the ignition switch 80, a shift position SP from the shift position sensor 82 that detects the operation position of the shift lever 81, and an accelerator opening Acc corresponding to the amount of depression of the accelerator pedal 83. Accelerator opening degree Acc from accelerator pedal position sensor 84 to be detected, brake pedal position BP from brake pedal position sensor 86 to detect the depression amount of brake pedal 85, vehicle speed V from vehicle speed sensor 88, electric pump 92 (electric motor) The pump temperature Tp and the like from the temperature sensor 89 that detects the temperature is input via the input port. Also, from the hybrid electronic control unit 70, output signals such as a drive signal to the electric motor that drives the electric pump 92 that generates hydraulic pressure, a drive signal to the three-way solenoid 93, and a drive signal to the linear solenoids 95a and 95b are output ports. It is output via. As described above, the hybrid electronic control unit 70 is connected to the engine ECU 24, the motor ECU 40, and the battery ECU 52 via communication ports, and exchanges various control signals and data with the engine ECU 24, the motor ECU 40, and the battery ECU 52. Is doing.

  The hybrid vehicle 20 of the embodiment thus configured calculates the required torque to be output to the ring gear shaft 32a as the drive shaft based on the accelerator opening Acc and the vehicle speed V corresponding to the depression amount of the accelerator pedal 83 by the driver. Then, the operation of the engine 22, the motor MG1, and the motor MG2 is controlled so that the required power corresponding to the required torque is output to the ring gear shaft 32a. As operation control of the engine 22, the motor MG1, and the motor MG2, the operation of the engine 22 is controlled so that power corresponding to the required power is output from the engine 22, and all of the power output from the engine 22 is the power distribution and integration mechanism 30. Torque conversion travel mode in which the motor MG1 and the motor MG2 are driven and controlled so as to be torque-converted by the motor MG1 and the motor MG2 and output to the ring gear shaft 32a, the required power, and the power required for charging and discharging the battery 50 The operation of the engine 22 is controlled so that the power corresponding to the sum of the power is output from the engine 22, and all or part of the power output from the engine 22 with charging / discharging of the battery 50 is the power distribution integration mechanism 30 and the motor. The required power is reduced by torque conversion by MG1 and motor MG2. Charge / discharge travel mode in which the motor MG1 and the motor MG2 are driven and controlled so as to be output to the shaft 32a, and the operation to stop the operation of the engine 22 and output the power corresponding to the required power from the motor MG2 to the ring gear shaft 32a. There are motor running modes that run under control. Here, since the torque conversion travel mode and the charge / discharge travel mode differ only in whether or not the battery 50 is charged / discharged, there is no substantial difference. Therefore, both are hereinafter referred to as an engine motor travel mode.

  Next, the process of managing the temperature of the electric pump 92 that generates the hydraulic pressure that acts on the brakes B1 and B2 of the transmission 60 together with the operation of the hybrid vehicle 20 of the embodiment thus configured, in particular, the mechanical pump 91 and this process. The operation of the hybrid vehicle 20 performed based on the result will be described. FIG. 4 is a flowchart illustrating an example of an electric pump temperature management processing routine executed by the hybrid electronic control unit 70 of the hybrid vehicle 20 of the embodiment. This routine is repeatedly executed every predetermined time (for example, every 8 msec).

  When the electric pump temperature management processing routine is executed, the CPU 72 of the hybrid electronic control unit 70 first inputs the pump temperature Tp of the electric pump 92 from the temperature sensor 89 (step S100), and the input pump temperature Tp and Each predetermined temperature T1, T2, T3 is compared (steps S110, S120, S130). Here, the predetermined temperatures T1, T2, and T3 are threshold values for determining the thermal state of the electric pump 92 (the electric motor built in the electric pump 92), and the predetermined temperature T1 is an allowable limit of the electric pump 92. The predetermined temperature T2 is set as a temperature lower than the predetermined temperature T1, and the predetermined temperature T3 is set as a temperature lower than the predetermined temperature T2. Therefore, by comparing the pump temperature Tp with each of the predetermined temperatures T1, T2, T3, it is possible to grasp which of the three stages the thermal state of the electric pump 92 is.

  When the pump temperature Tp is lower than the predetermined temperature T1, T2 but higher than the predetermined temperature T3, switching to the motor travel mode is prohibited (step S140), and the pump temperature Tp is lower than the predetermined temperature T1, but higher than the predetermined temperature T2. Is further prohibited from assist driving during shifting of the electric pump 92 (step S150), and when the pump temperature Tp is equal to or higher than the predetermined temperature T1, the engine 22 is further prohibited from starting (step S160). This routine ends. That is, when the pump temperature Tp rises and exceeds the predetermined temperature T3, first, prohibition of switching to the motor travel mode is executed, and when the pump temperature Tp further rises and exceeds the predetermined temperature T2, prohibition of switching to the motor travel mode is performed. And prohibition of assist driving at the time of shifting of the electric pump 92, and further prohibition of switching to the motor running mode, prohibition of assist driving at the time of shifting of the electric pump 92, and starting of the engine 22 The prohibition is executed. The reason for this will be described later. Hereinafter, the operation of the hybrid vehicle 20 of the embodiment performed based on the execution result of the electric pump temperature management processing routine of FIG. 4 will be described.

  FIG. 5 is a flowchart illustrating an example of a drive control routine executed by the hybrid electronic control unit 70 of the hybrid vehicle 20 according to the embodiment. This routine is repeatedly executed every predetermined time (for example, every 8 msec). When the drive control routine is executed, the CPU 72 of the hybrid electronic control unit 70 first inputs data such as the accelerator opening Acc from the accelerator pedal 83, the vehicle speed V from the vehicle speed sensor 88, and the current travel mode (step). S200), the required torque Tr * and the required power Pr * to be output to the ring gear shaft 32a as the drive shaft are set based on the input accelerator opening Acc and the vehicle speed V (step S210). Here, as for the required torque Tr *, in the embodiment, the relationship between the accelerator opening Acc, the vehicle speed V, and the required torque Tr * is previously stored in the ROM 74 as a required torque setting map, and the accelerator opening Acc and the vehicle speed V are stored. Is set by deriving the corresponding required torque Tr * from the map. Further, the required power Pr * is set by multiplying the required torque Tr * that is obtained by multiplying the vehicle speed V by the conversion coefficient k for converting the vehicle speed V to the rotation speed Nr of the ring gear shaft 32a.

  When the required power Pr * is set, the vehicle required power required for the vehicle by the sum of the required power Pr *, the charge / discharge required amount Pb * of the battery 50 set based on the remaining capacity SOC, and the loss (Loss). P * is set (step S220), and the vehicle required power P * is compared with the threshold values P1 and P2 (step S230). Here, the threshold values P1 and P2 are threshold values for determining whether the travel mode is the motor travel mode or the engine motor travel mode, and has hysteresis to prevent frequent switching of the travel mode. Yes.

  When the vehicle required power P * is larger than the threshold value P2, it is determined that the engine 22 can be operated efficiently or the motor driving mode cannot cope with the required torque Tr *, and the current driving mode input in step S200 is the motor driving mode. (Step S240), the driving mode is switched from the motor driving mode to the engine motor driving mode (step S250), and the required torque Tr * is output to the ring gear shaft 32a according to the driving mode after switching. MG1 and MG2 are driven and controlled (step S260), and this routine ends. Specifically, the switching from the motor travel mode to the engine motor travel mode is performed by cranking the engine 22 with the motor MG1 while taking charge of the reaction force of the ring gear shaft 32a with the motor MG2 and starting ignition and fuel injection of the engine 22. By doing. Further, as drive control of the engine 22 and the motors MG1 and MG2 in the engine motor travel mode, the vehicle 22 is operated to output the required power by setting the required vehicle power P * to the required power to be output from the engine 22. A point (target rotational speed Ne *, target torque Te *) is set, a torque command Tm1 * of the motor MG1 is set so that the engine 22 is operated at the set operation point, and from the engine 22 via the power distribution integration mechanism 30 The torque command Tm2 * of the motor MG2 is set so that the required torque Tr * is output to the ring gear shaft 32a together with the torque directly transmitted to the ring gear shaft 32a, and the operating point is set to the engine ECU 24 and the torque commands Tm1 * and Tm2 * are set. This is performed by transmitting to each motor ECU 40. The engine ECU 24 that has received the operating point performs fuel injection control and ignition control so that the engine 22 is operated at this operating point. In addition, the motor ECU 40 that has received the torque commands Tm1 * and Tm2 * performs switching control of the switching elements of the inverters 41 and 42 so that torque corresponding to the torque commands Tm1 * and Tm2 * is output from the motors MG1 and MG2.

  On the other hand, when the vehicle required power P * is smaller than the threshold value P1, it is determined that the engine 22 cannot be operated efficiently, and the current travel mode input in step S200 is the engine motor travel mode (step S270). In step S140 of the routine of FIG. 4, it is determined whether the pump temperature Tp is equal to or higher than the predetermined temperature T3 and motor travel is prohibited (step S280). When the motor travel is prohibited, the current travel mode, that is, the engine motor travel mode is maintained, and the engine 22 and the motor MG1, so that the required torque Tr * is output to the ring gear shaft 32a in this engine motor travel mode. When MG2 is driven and controlled (step S260), this routine is terminated, and when motor travel is not prohibited, the engine motor travel mode is switched to the motor travel mode (step S290), and the required torque is switched in the motor travel mode after switching. The motor MG2 is driven and controlled so that Tr * is output to the ring gear shaft 32a (step S260), and this routine is terminated. Switching from the engine motor running mode to the motor running mode stops the fuel injection and ignition of the engine 22 to stop the rotation of the engine 22 by the motor MG1, and the motor MG2 outputs the required torque Tr * only from the motor MG2. This is done by controlling the driving of. The motor travel is prohibited when the pump temperature Tp of the electric pump 92 becomes equal to or higher than the predetermined temperature T3 to prevent the mechanical pump 91 from stopping due to the stop of the engine 22, that is, by stopping the mechanical pump 91. This is to prevent the burden on the electric pump 92 from increasing. Thereby, the further temperature rise of the electric pump 92 is suppressed. In step S230, it is determined that the required vehicle power P * is not less than threshold value P1 and not more than threshold value P2, in step S240 it is determined that the current travel mode is not the motor travel mode, or in step S270 the current travel mode is determined. When it is determined that it is not the engine motor travel mode, the current travel mode is maintained and the engine 22 and the motors MG1 and MG2 are driven and controlled so that the required torque Tr * is output to the ring gear shaft 32a (step S260). This routine ends.

  Next, the shift process of the transmission 60 performed using the execution result of the electric pump temperature management process routine of FIG. 4 will be described. FIG. 6 is a flowchart illustrating an example of a shift process routine executed by the hybrid electronic control unit 70 of the hybrid vehicle 20 according to the embodiment. This routine is repeatedly executed every predetermined time (for example, every 8 msec) while the engine 22 is being operated. When the shift process routine is executed, the CPU 72 of the hybrid electronic control unit 70 first determines whether or not a shift request has been made (step S300). Here, the speed change request is made as a request for switching from the Lo gear state to the Hi gear state, or from the Hi gear state to the Lo gear state, and the timing is the same as the required torque Tr * or the vehicle speed V described above. Based on. If it is determined that a shift request has not been made, this routine is terminated without doing anything.

  If it is determined that a shift request has been made, it is determined in step S150 of the routine of FIG. 4 whether or not the pump temperature Tp is equal to or higher than the predetermined temperature T2 and the assist driving during shifting of the electric pump 92 is prohibited ( If it is determined that the assist drive is not prohibited (step S310), the electric pump 92 is turned on (step S320), a shift is executed in this ON state (step S340), and this routine is terminated. Since the mechanical pump 91 is driven by the engine 22 in a state where the engine 22 is in operation, the hydraulic pressure from the electric pump 92 is assisted by the hydraulic pressure from the mechanical pump 91, and a shift is executed. . Note that the transmission of the transmission 60 is a state in which the brake B1 is off and the brake B2 is on from the state where the brake B1 is on and the brake B2 is off when the shift request is switching from the Lo gear state to the Hi gear state. When the shift request of the transmission 60 is from the Hi gear state to the Lo gear state, the brake B1 is on and the brake B2 is off, and the brake B1 is off and the brake B2 is on. This is done as a switch to the state.

  On the other hand, if it is determined that the assist drive during the shifting of the electric pump 92 is prohibited, the electric pump 92 is turned off (step S330), and the shifting is executed in this OFF state (step S340). End the routine. As described above, when the pump temperature Tp becomes equal to or higher than the predetermined temperature T2, the assist driving at the time of shifting the electric pump 92 is stopped, thereby reducing the burden on the electric pump 92 and suppressing the temperature rise. . Here, when the pump temperature Tp is equal to or higher than the predetermined temperature T2 and the assist driving at the time of shifting of the electric pump 92 is prohibited, the pump temperature Tp is equal to or higher than the predetermined temperature T3 and motor running is also prohibited. Reference numeral 22 denotes an operating state, in which the mechanical pump 91 is driven. Therefore, in this case, the shift is executed using the hydraulic pressure generated only from the mechanical pump 91. However, since the electric pump 92 is not assisted-driven, the time required for shifting is longer than when both the mechanical pump 91 and the electric pump 92 are driven.

  Next, the engine 22 start-up process performed using the execution result of the electric pump temperature management process routine of FIG. 4 will be described. FIG. 7 is a flowchart illustrating an example of a start processing routine executed by the hybrid electronic control unit 70 of the hybrid vehicle 20 according to the embodiment. This routine is repeatedly executed every predetermined time (for example, every 8 msec). When the start processing routine is executed, the CPU 72 of the hybrid electronic control unit 70 first determines whether or not a start request for the engine 22 has been made (step S400), and it is determined that no start request has been made. Then, this routine is terminated without doing anything. If it is determined that a start request has been made, the shift position SP from the shift position sensor 82 is input (step S410), and it is determined whether or not the input shift position SP is in the P range (step S420). If it is determined that the shift position SP is in the P range, the engine 22 is cranked by the motor MG1 as it is (step S430), fuel injection and ignition of the engine 22 are started (step S440), and the engine 22 is completely exploded. When this occurs (step S450), this routine is terminated. In the hybrid vehicle 20 of the embodiment, when the shift lever 81 is operated to the P range, a parking lock mechanism (not shown) is activated to lock the ring gear shaft 32a. Therefore, the engine 22 is cranked and started by the motor MG1 while receiving the reaction force of the ring gear shaft 32a by the parking lock mechanism.

  If it is determined that the shift position SP is not in the P range, next, in step S140 of the electric pump temperature management processing routine of FIG. 4, whether or not the pump temperature Tp is equal to or higher than the predetermined temperature T1 and start of the engine 22 is prohibited. (Step S460), and when the start of the engine 22 is not prohibited, the motors MG1 and MG2 are driven and controlled so that the motor MG1 cranks the engine 22 while receiving the reaction force on the ring gear shaft 32a side with the motor MG2. At the same time (step S470), fuel injection and ignition of the engine 22 are started (step S440), and when the engine 22 is completely detonated (step S450), this routine is terminated. On the other hand, when the start of the engine 22 is prohibited, the present routine is terminated without starting the engine 22 regardless of the start request. The start of the engine 22 is prohibited when the pump temperature Tp is equal to or higher than the predetermined temperature T1. When the engine 22 is started, when the engine 22 is cranked by the normal motor MG1, the motor MG2 counteracts the reaction on the ring gear shaft 32a side. However, when the pump temperature Tp is equal to or higher than the predetermined temperature T1 and reaches the allowable limit temperature or the vicinity thereof, the mechanical pump 91 is in a state where the electric pump 92 cannot be driven and the engine 22 is stopped. This is based on the fact that the torque for handling the reaction force by the motor MG2 cannot be transmitted by the transmission 60.

  FIG. 8 is an explanatory diagram showing changes in time of ON / OFF of the pump temperature Tp and motor travel prohibition, assist drive prohibition during shifting of the electric pump 92, and engine start prohibition. As shown in the figure, when the pump temperature Tp as the temperature of the electric pump 92 becomes equal to or higher than the predetermined temperature T3 at time t1, first, the motor travel is prohibited, and the pump temperature Tp further rises to reach the predetermined temperature T2 or higher at time t2. Then, the assist drive at the time of shifting of the electric pump 92 is prohibited. Since such a prohibition reduces the burden on the electric pump 92, the temperature rise is suppressed. In this way, by reducing the requirements for the electric pump 92 to operate step by step, it is possible to suppress the pump temperature Tp from rising until reaching the predetermined temperature T1 (the allowable limit temperature or a temperature in the vicinity thereof). It is possible to prevent the engine 22 from starting because the motor MG2 cannot handle the reaction force (see the pump temperature Tp in FIG. 8).

  According to the hybrid vehicle 20 of the embodiment described above, the temperature of the electric pump 92 used for the operation of the transmission 60 (pump temperature Tp) reaches the predetermined temperature T1, that is, the allowable limit temperature or the vicinity thereof. The start is prohibited, and when the pump temperature Tp reaches a predetermined temperature T2 set as a temperature lower than the predetermined temperature T1, the assist driving at the time of shifting of the electric pump 92 is prohibited, and the pump temperature Tp becomes the predetermined temperature T2. When a predetermined temperature T3 set as a lower temperature is reached, switching to the motor travel mode is prohibited, that is, stopping of the engine 22 (mechanical pump 91) is prohibited. Therefore, as the pump temperature Tp rises, the frequency of driving the electric pump 92 is reduced and the temperature rise is suppressed, so that the pump temperature Tp becomes equal to or higher than the allowable limit temperature or a predetermined temperature T1 in the vicinity thereof. Prevents transmission of power from being disabled by the transmission 60 when stopped, and prevents the engine 22 from starting without being able to handle the reaction force of the ring gear shaft 32a by the motor MG2 when starting the engine 22. can do.

  In the hybrid vehicle 20 of the embodiment, every time the temperature of the electric pump 92 (pump temperature Tp) reaches each of the predetermined temperatures T1, T2, T3, prohibition of motor travel, prohibition of assist drive during shifting of the electric pump 92, engine 22 However, it is also possible to execute only the prohibition of motor travel and the prohibition of starting of the engine 22, or the prohibition of the assist drive during the shift of the electric pump 92 and the starting of the engine 22. Only prohibition may be executed, or other restrictions may be executed in addition to these restrictions.

  In the hybrid vehicle 20 of the embodiment, when the pump temperature Tp becomes equal to or higher than the predetermined temperature T2, the assist driving at the time of shifting of the electric pump 92 is prohibited and the shifting is executed only by the hydraulic pressure from the mechanical pump 91. However, the execution of the shift may be prohibited.

  In the hybrid vehicle 20 of the embodiment, the power of the motor MG2 is changed by the transmission 60 and output to the ring gear shaft 32a. However, as illustrated in the hybrid vehicle 120 of the modified example of FIG. Is shifted by the transmission 60 and connected to an axle (an axle connected to the wheels 39c and 39d in FIG. 9) different from an axle to which the ring gear shaft 32a is connected (an axle to which the drive wheels 39a and 39b are connected). It is good.

  In the hybrid vehicle 20 of the embodiment, the power of the engine 22 is output to the ring gear shaft 32a as the drive shaft connected to the drive wheels 39a and 39b via the power distribution and integration mechanism 30, but the modified example of FIG. The hybrid vehicle 220 includes an inner rotor 232 connected to the crankshaft 26 of the engine 22 and an outer rotor 234 connected to a drive shaft that outputs power to the drive wheels 39a and 39b. A counter-rotor motor 230 that transmits a part of the power to the drive shaft and converts the remaining power into electric power may be provided.

  The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

  The present invention is applicable to the automobile industry.

1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 equipped with a power output apparatus as one embodiment of the present invention. FIG. 3 is a configuration diagram showing an outline of a configuration of a transmission 60. FIG. 2 is a configuration diagram showing an outline of a configuration of a hydraulic circuit 90. It is a flowchart which shows an example of the electric pump temperature management process routine performed by the hybrid electronic control unit 70 of the hybrid vehicle 20 of an Example. It is a flowchart which shows an example of a drive control routine. It is a flowchart which shows an example of a shift process routine. It is a flowchart which shows an example of a starting process routine. It is explanatory drawing explaining the time change state of pump temperature Tp, motor driving | running | working prohibition, the assist drive prohibition at the time of the speed change of the electric pump 92, and on-off of engine start prohibition. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 120 according to a modification. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 220 of a modified example.

Explanation of symbols

  20, 120, 220 Hybrid vehicle, 22 engine, 24 engine electronic control unit (engine ECU), 26 crankshaft, 28 damper, 30 power distribution integration mechanism, 31 sun gear, 32 ring gear, 32a ring gear shaft, 33 pinion gear, 34 carrier , 37 gear mechanism, 38 differential gear, 39a, 39b, 39c, 39d drive wheel, 40 motor electronic control unit (motor ECU), 41, 42 inverter, 43, 44 rotational position detection sensor, 48 rotational shaft, 50 battery, 52 battery electronic control unit (battery ECU), 54 power line, 60 transmission, 60a double pinion planetary gear mechanism, 60b single pinion planetary gear mechanism, 61 sun gear, 62 ring gear, 63a 1st pinion gear, 63b 2nd pinion gear, 64 carrier, 65 sun gear, 66 ring gear, 67 pinion gear, 68 carrier, 70 electronic control unit for hybrid, 72 CPU, 74 ROM, 76 RAM, 80 ignition switch, 81 shift lever, 82 shift Position sensor, 83 accelerator pedal, 84 accelerator pedal position sensor, 85 brake pedal, 86 brake pedal position sensor, 88 vehicle speed sensor, 89 temperature sensor, 90 hydraulic circuit, 91 mechanical pump, 92 electric pump, 93 3-way solenoid, 94 Pressure control valve, 95a, 95b linear solenoid, 96a, 96b control valve, 97a, 97b accumulator, 230 pair rotor electric , 232 inner rotor, 234 outer rotor, MG1, MG2 motor, B1, B2 brake.

Claims (12)

A power output device that outputs power to a drive shaft,
An internal combustion engine;
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is executed to limit the starting of the internal combustion engine by the starting means accompanied by the driving of the electric hydraulic pressure generating means. When the detected state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the shift transmission means with the driving of the electric hydraulic pressure generating means A power output device comprising: a limit control unit that executes a second limit control that limits a change in the gear ratio. The power output device according to claim 1,
When the change of the transmission gear ratio is instructed by the transmission transmission means while the internal combustion engine is operating at a normal time when the detected state of the electric hydraulic pressure generation means does not reach the second state, A normal-time shift control unit that drives and controls the shift transmission unit so as to change to the instructed gear ratio using the hydraulic pressure generated by the mechanical hydraulic pressure generation unit and the hydraulic pressure generated by the electric hydraulic pressure generation unit; ,
The limiting control means stops the electric hydraulic pressure generating means as the second limiting control when an instruction to change the speed ratio of the speed change transmission means is given during operation of the internal combustion engine. A power output device, which is a means for drivingly controlling the speed change transmission means so as to be changed to the instructed speed ratio by the hydraulic pressure generated by the mechanical hydraulic pressure generation means in a state.   The restriction control means restricts the stop of the operation of the internal combustion engine when the detected state of the electric hydraulic pressure generating means reaches a third state as a state before reaching the second state. The power output apparatus according to claim 1, wherein the power output apparatus is a means for executing the restriction control. A power output device capable of outputting power to a drive shaft,
An internal combustion engine;
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is executed to limit the starting of the internal combustion engine by the starting means accompanied by the driving of the electric hydraulic pressure generating means. When the detected state of the electric hydraulic pressure generating means reaches a third state as a state before reaching the first state, a third restriction control for restricting the shutdown of the internal combustion engine is performed. A power output apparatus comprising: a restriction control means to be executed.   The power output device according to any one of claims 1 to 4, wherein the state detection means is a temperature detection means for detecting a temperature of the electric hydraulic pressure generation means. The power output device according to any one of claims 1 to 5,
It is connected to the output shaft of the internal combustion engine, the drive shaft, and the third rotation shaft, and when the power input / output to / from any two of the three shafts is determined, it enters the remaining one shaft. 3-axis power input / output means for determining the output power;
A rotary shaft electric motor capable of inputting and outputting power to the third rotary shaft;
The starting means is means having the electric motor for the rotating shaft. The power output device according to any one of claims 1 to 5,
A first rotor connected to the output shaft of the internal combustion engine and a second rotor connected to the drive shaft, and the first rotor and the second rotation by electromagnetic action A counter-rotor electric motor that drives by rotating the child relatively,
The starting means is means having the counter-rotor electric motor.   An automobile on which the power output device according to any one of claims 1 to 7 is mounted and the drive shaft is connected to an axle. A drive device that inputs power from an internal combustion engine and outputs power to a drive shaft,
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is executed to limit the starting of the internal combustion engine by the starting means accompanied by the driving of the electric hydraulic pressure generating means. When the detected state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the shift transmission means with the driving of the electric hydraulic pressure generating means And a limit control means for executing a second limit control for limiting a change in the gear ratio. A drive device that inputs power from an internal combustion engine and outputs power to a drive shaft,
A motor capable of generating electricity,
Shift transmission means that operates by hydraulic pressure and transmits power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio;
Mechanical hydraulic pressure generating means driven by the internal combustion engine to generate the hydraulic pressure;
Electric hydraulic pressure generating means that is driven by power supply and generates the hydraulic pressure;
Starting means for starting the internal combustion engine using a reaction force on the drive shaft side which is handled by the electric motor;
State detecting means for detecting the state of the electric hydraulic pressure generating means;
When the detected state of the electric hydraulic pressure generating means reaches the first state, the first limiting control is executed to limit the starting of the internal combustion engine by the starting means accompanied by the driving of the electric hydraulic pressure generating means. When the detected state of the electric hydraulic pressure generating means reaches a third state as a state before reaching the first state, a third restriction control for restricting the shutdown of the internal combustion engine is performed. A drive device comprising: restriction control means to be executed. An internal combustion engine, an electric motor capable of generating electricity, transmission transmission means for transmitting power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio operated by hydraulic pressure, and the hydraulic pressure driven by the internal combustion engine Mechanical hydraulic pressure generating means to be generated, electric hydraulic pressure generating means that is driven by receiving electric power to generate the hydraulic pressure, and start that starts the internal combustion engine using a reaction force on the drive shaft side that is handled by the electric motor A power output apparatus control method comprising:
(A) detecting the state of the electric hydraulic pressure generating means;
(B) a first restriction that restricts starting of the internal combustion engine by the starting means that is accompanied by driving of the electric hydraulic pressure generating means when the detected state of the electric hydraulic pressure generating means reaches the first state; When the control is executed and the detected state of the electric hydraulic pressure generating means reaches the second state as the state before reaching the first state, the shift with the driving of the electric hydraulic pressure generating means is performed. A control method for a power output apparatus that executes second restriction control for restricting a change in speed ratio by a transmission means. An internal combustion engine, an electric motor capable of generating electricity, transmission transmission means for transmitting power between the rotating shaft of the electric motor and the drive shaft with a changeable gear ratio operated by hydraulic pressure, and the hydraulic pressure driven by the internal combustion engine Mechanical hydraulic pressure generating means to be generated, electric hydraulic pressure generating means that is driven by receiving electric power to generate the hydraulic pressure, and start that starts the internal combustion engine using a reaction force on the drive shaft side that is handled by the electric motor A power output apparatus control method comprising:
(A) detecting the state of the electric hydraulic pressure generating means;
(B) a first restriction that restricts starting of the internal combustion engine by the starting means that is accompanied by driving of the electric hydraulic pressure generating means when the detected state of the electric hydraulic pressure generating means reaches the first state; When the control is executed and the detected state of the electric hydraulic pressure generating means reaches a third state as a state before reaching the first state, a third stop that restricts the operation stop of the internal combustion engine is performed. A control method for a power output device that executes limit control.

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