JP2007196733A - Power output device or driving gear, its control method, and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cope more properly, when driving restriction of a motor is performed, which is used for power conversion in the middle of output of power to a driving shaft, in a state where charging/discharging of a power accumulation device is prohibited, concerning a device for outputting the power from an internal combustion engine to the driving shaft via power conversion in company with charging/discharging of the power accumulation device, such as a secondary battery. <P>SOLUTION: When driving restriction of the motor MG2 is performed in the middle of traveling without a battery (S170), operation of an engine 22 is stopped and driving of motors MG1, MG2 is stopped, to thereby stop traveling (S180), and ready-off is performed in order to stop the system (S190). As a result, breakage of another apparatus, connected to a power system connected to the motors MG1, MG2 via an inverter, can be suppressed, to thereby enable to cope more properly when driving restriction of the motor MG2 is performed in the middle of traveling without the battery. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power output device, a drive device, a control method thereof, and a vehicle.

Conventionally, this type of power output device includes an engine, a planetary gear having a carrier connected to the crankshaft of the engine and a ring gear connected to the axle side, a generator connected to the sun gear of the planetary gear, and the axle side. A vehicle-mounted one including an electric motor that outputs power to the vehicle has been proposed (for example, see Patent Document 1). In this device, feedback control is performed so that the engine is operated at the target rotational speed, the inverter that drives the generator is stopped, and the reverse generated by the rotation of the generator with the rotation of the engine with the inverter stopped. By driving the electromotive force to the electric motor, the vehicle travels without charging / discharging the battery.
JP 2003-204606 A

  In the above-described power output device, it is possible to output driving power without charging or discharging the battery. In some cases, electrical equipment may be damaged. In particular, when the drive limit of the motor is imposed for the reason not based on the abnormality of the motor, the motor can be driven, and thus other devices may be damaged.

  The power output device, the drive device and the control method thereof, and the vehicle according to the present invention output power from the internal combustion engine to the drive shaft via power conversion with charging / discharging of a power storage device such as a secondary battery. It is an object of the present invention to more appropriately cope with a case where the drive of an electric motor used for power conversion is restricted while power is being output to a drive shaft while charging / discharging of the power storage device is prohibited.

  The power output device, the drive device, the control method thereof, and the vehicle of the present invention employ the following means in order to achieve the above-described object.

The power output apparatus of the present invention is
A power output device that outputs power to a drive shaft,
An internal combustion engine;
An electric power motive power input / output means connected to the output shaft of the internal combustion engine and the drive shaft for inputting / outputting power to / from the output shaft and the drive shaft together with input / output of electric power and motive power;
An electric motor capable of inputting and outputting power to the drive shaft;
A power storage means capable of exchanging power with the electric power drive input / output means and the electric motor;
Required driving force setting means for setting required driving force required for the drive shaft;
The internal combustion engine and the electric power power input / output unit are configured such that the driving force based on the set required driving force is output to the drive shaft without charging / discharging the power storage unit without charging / discharging the power storage unit. And the internal combustion engine so that the driving of the electric power drive input / output means and the electric motor is stopped when the electric motor is limited during the non-charge / discharge control for controlling the electric motor and the electric motor. Control means for controlling the power drive input / output means and the electric motor;
It is a summary to provide.

  In the power output apparatus of the present invention, the required driving force required for the drive shaft without charging / discharging the power storage means is prohibited by charging / discharging the power power input / output means and the power storage means capable of exchanging power with the electric motor. When the electric motor is limited during the charge / discharge control for controlling the internal combustion engine, the electric power input / output means and the electric motor so that the driving force based on the motor is output to the driving shaft, at least the electric power The internal combustion engine, the power drive input / output means, and the electric motor are controlled so that the driving of the input / output means and the electric motor is stopped. Here, “the drive of the power drive input / output means and the electric motor is stopped” means that power generation and power consumption are not performed via the power drive input / output means and the electric motor. As described above, since power generation and power consumption are not performed via the power power input / output means and the electric motor, damage to the device can be suppressed by these power generation and power consumption. As a result, when the drive of the electric motor is restricted while charging / discharging of the power storage means is prohibited and the driving force is being output to the drive shaft without charging / discharging the power storage means, more appropriate countermeasures are taken. Can do. The “motor drive restriction” includes prohibition of torque output from the motor.

  In such a power output apparatus of the present invention, the transmission of the power between the rotating shaft of the motor and the drive shaft is transmitted with a change in the transmission ratio, and the motor is driven based on the abnormality of the transmission of the transmission. Drive restriction setting means for setting a restriction may also be provided. In this way, it is possible to cope more appropriately when the drive of the electric motor is limited due to an abnormality of the transmission means. In this case, the shift transmission means is a means that operates using a pressurized working fluid, and the drive restriction setting means is a means for setting a drive restriction of the electric motor based on the pressure of the working fluid. You can also Further, the drive restriction setting means may be means for setting a drive restriction of the electric motor based on a degree of power transmission in the shift transmission means.

  In the power output apparatus of the present invention, the power output device includes a drive circuit that drives the power power input / output means and the motor, and the control means has a capacity of an element that can be stored in the drive circuit as the non-charge / discharge control. The internal combustion engine, the power drive input / output means, and the electric motor are controlled so that a drive force based on the set required drive force is output to the drive shaft with a power balance within the range of You can also

  Furthermore, in the power output apparatus of the present invention, the control means controls the internal combustion engine to stop the operation of the internal combustion engine when the drive of the electric motor is restricted while the non-charge / discharge control is being performed. It can also be a means for controlling. In this case, system off of the device itself is also included.

  Alternatively, in the power output apparatus of the present invention, the power power input / output means is connected to three axes of the output shaft, the drive shaft, and the third shaft of the internal combustion engine, and any two of the three shafts are connected. It may be a means provided with a three-shaft power input / output means for inputting / outputting power to the remaining shaft based on the input / output power and a generator for inputting / outputting power to / from the third shaft. .

  The vehicle of the present invention is a power output device of the present invention according to any of the aspects of the present invention described above, that is, basically, the power output device of the present invention is a power output device that outputs power to a drive shaft. An internal combustion engine, and an electric power power input / output means connected to the output shaft and the drive shaft of the internal combustion engine, for inputting / outputting power to / from the output shaft and the drive shaft with input / output of electric power and power , An electric motor capable of inputting / outputting power to / from the drive shaft, an electric power power input / output means, an electric storage means capable of exchanging electric power with the electric motor, and a required drive force for setting a required drive force required for the drive shaft The internal combustion engine and the electric power are set so that a driving force based on the set required driving force is output to the driving shaft without charging / discharging the power storage device without charging / discharging the power storage device. Power input / output means and the electric motor When the drive restriction of the electric motor is performed during the execution of the charge / discharge control, the internal combustion engine and the electric power input / output so that at least the electric power input / output means and the drive of the electric motor are stopped. And a control means for controlling the electric motor. The power output device is mounted, and the axle is connected to the drive shaft.

  Since the vehicle according to the present invention is equipped with the power output device of the present invention according to any one of the aspects described above, the effects of the power output device of the present invention, for example, charging / discharging of the power storage means is prohibited and charging of the power storage means is prohibited. The device can be prevented from being damaged by the effect that can be dealt with more appropriately when the drive of the electric motor is restricted while the driving force is being output to the drive shaft without discharging. The same effects as the effects can be achieved.

The drive device of the present invention is
A drive device incorporated in a power output device including an internal combustion engine and power storage means,
It is connected to the power storage means so that power can be exchanged, and is connected to the output shaft and the drive shaft of the internal combustion engine, and power is supplied to the output shaft and the drive shaft together with input and output of power and power. Power input / output means for input and output;
An electric motor that is connected to the power storage means so that electric power can be exchanged and that can input and output power to the drive shaft;
The charging and discharging of the power storage means is prohibited, and the driving force based on the required driving force required for the drive shaft is output to the drive shaft without charging and discharging the power storage means, together with the control of the internal combustion engine, The electric power drive input / output means and the electric power drive input / output means so that the drive of the electric motor is stopped when the drive of the electric motor is restricted during the control of the electric power drive input / output means and the electric motor; Control means for controlling the electric motor;
It is a summary to provide.

  In the drive device of the present invention, charging / discharging of the power storage device capable of exchanging power with the power drive input / output device and the electric motor is prohibited, so that the required driving force required for the drive shaft without charging / discharging the power storage device is achieved. When the motor drive is restricted during the control of the internal combustion engine and the power power input / output means and the motor so that the driving force based on the power is output to the drive shaft, the power power input / output means and the motor drive The power motive power input / output means and the electric motor are controlled so as to be stopped. Here, “the drive of the power drive input / output means and the electric motor is stopped” means that power generation and power consumption are not performed via the power drive input / output means and the electric motor. As described above, since power generation and power consumption are not performed via the power power input / output means and the electric motor, damage to the device can be suppressed by these power generation and power consumption. As a result, when the drive of the electric motor is restricted while charging / discharging of the power storage means is prohibited and the driving force is being output to the drive shaft without charging / discharging the power storage means, more appropriate countermeasures are taken. Can do. The “motor drive restriction” includes prohibition of torque output from the motor.

The method for controlling the power output apparatus of the present invention includes:
An internal combustion engine; power power input / output means connected to an output shaft and a drive shaft of the internal combustion engine for inputting and outputting power to and from the output shaft and the drive shaft with input and output of power and power; and the drive A power output device control method comprising: an electric motor capable of inputting / outputting power to a shaft; and an electric power input / output means and an electric storage means capable of exchanging electric power with the electric motor,
The internal combustion engine and the power power so that a driving force based on a required driving force required for the drive shaft is output to the drive shaft without charging / discharging the power storage device without charging / discharging the power storage device. When the drive of the motor is restricted during the control of the input / output means and the electric motor, at least the internal combustion engine and the power power input are stopped so that the drive of the electric power input / output means and the electric motor is stopped. Controlling the output means and the electric motor;
It is characterized by that.

  In the control method of the power output apparatus of the present invention, charging / discharging of the power drive input / output means and the power storage means capable of exchanging power with the electric motor is prohibited, and required for the drive shaft without charging / discharging the power storage means. When the drive restriction of the motor is performed during the non-charge / discharge control for controlling the internal combustion engine, the power drive input / output means and the motor so that the drive force based on the requested drive force is output to the drive shaft, The internal combustion engine, the power drive input / output means, and the motor are controlled so that at least the drive of the power drive input / output means and the motor is stopped. Here, “the drive of the power drive input / output means and the electric motor is stopped” means that power generation and power consumption are not performed via the power drive input / output means and the electric motor. As described above, since power generation and power consumption are not performed via the power power input / output means and the electric motor, damage to the device can be suppressed by these power generation and power consumption. As a result, when the drive of the electric motor is restricted while charging / discharging of the power storage means is prohibited and the driving force is being output to the drive shaft without charging / discharging the power storage means, more appropriate countermeasures are taken. Can do. The “motor drive restriction” includes prohibition of torque output from the motor.

The method for controlling the drive device of the present invention includes:
Built in a power output device including an internal combustion engine and power storage means, and connected to the power storage means so as to be able to exchange power, and connected to the output shaft and drive shaft of the internal combustion engine to input and output power and power An electric power input / output means for inputting / outputting power to / from the output shaft and the drive shaft, and an electric motor connected to the power storage means so as to be able to exchange electric power and capable of inputting / outputting power to the drive shaft. A method for controlling a drive device comprising:
The charging and discharging of the power storage means is prohibited, and the driving force based on the required driving force required for the drive shaft is output to the drive shaft without charging and discharging the power storage means, together with the control of the internal combustion engine, The electric power drive input / output means and the electric power drive input / output means so that the drive of the electric motor is stopped when the drive of the electric motor is restricted during the control of the electric power drive input / output means and the electric motor; Controlling the motor;
It is characterized by that.

  In the control method of the drive device according to the present invention, charging / discharging of the electric power drive input / output means and the electric storage means capable of exchanging electric power with the electric motor is prohibited, and the request required for the drive shaft without charging / discharging the electric storage means When the drive of the electric motor is restricted during the control of the internal combustion engine and the electric power power input / output means and the electric motor so that the driving force based on the driving force is output to the driving shaft, the electric power power input / output means The power drive input / output means and the motor are controlled so that the drive of the motor is stopped. Here, “the drive of the power drive input / output means and the electric motor is stopped” means that power generation and power consumption are not performed via the power drive input / output means and the electric motor. As described above, since power generation and power consumption are not performed via the power power input / output means and the electric motor, it is possible to suppress damage to the equipment due to these power generation and power consumption. As a result, when the drive of the electric motor is restricted while charging / discharging of the power storage means is prohibited and the driving force is being output to the drive shaft without charging / discharging the power storage means, more appropriate countermeasures are taken. Can do. The “motor drive restriction” includes prohibition of torque output from the motor.

  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 a 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 motor MG2 is connected to the ring gear 32 via the transmission 60. The motor MG1 generates power. When the motor MG1 functions as a motor, the 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 22 input from the carrier 34. And the power from the motor MG1 input from the sun gear 31 are integrated and output to the ring gear 32. The ring gear 32 is mechanically connected to the drive wheels 39a and 39b of the front wheels of the vehicle via a gear mechanism 37 and a differential gear 38. Therefore, the power output to the ring gear 32 is output to the drive wheels 39a and 39b via the gear mechanism 37 and the differential gear 38. Note that the three axes connected to the power distribution and integration mechanism 30 when viewed as a drive system are the crankshaft 26 that is the output shaft of the engine 22 connected to the carrier 34, and the rotation shaft of the motor MG1 that is connected to the sun gear 31. The ring gear shaft 32a as a drive shaft is connected to the sun gear shaft 31a and the ring gear 32 and mechanically connected to the drive wheels 39a and 39b.

  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 a positive bus and a negative bus shared by the inverters 41 and 42 in a state where the voltage is smoothed by the smoothing capacitor 55. The motor MG1, The electric power generated on one side of the MG 2 can be consumed by another motor. 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 by a rotational speed calculation routine (not shown) based on signals input from the rotational position detection sensors 43 and 44. 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 be able 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 a Lo gear state), the brake B1 is turned on and the brake B2 is turned off to rotate the rotating shaft 48 of the motor MG2. Is rotated 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). Note that 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 turned on and off by the hydraulic pressure from the hydraulic circuit 100 illustrated in FIG. As shown in the figure, the hydraulic circuit 100 includes a mechanical pump 102 that pumps oil by the power from the engine 22, an electric pump 104 that pumps oil by the power from the built-in motor 103, a mechanical pump 102, A three-way solenoid 105 and a pressure control valve 106 that can switch the pressure (line pressure) of oil pumped from the pump 104, and a linear that can be individually supplied to the brakes B1 and B2 with adjustable pressure. Solenoids 110, 111 and control valves 112, 113, modulator valve 108 that reduces the line pressure and supplies it to the input ports of 3-way solenoid 105 and linear solenoids 110, 111, control valves 112, 113, and brakes B1, B2 Oil passage between When hydraulic pressure is supplied from either one of the control valves 112 and 113, the oil passage to the corresponding brake is opened and the oil passage to the other brake is shut off, and the hydraulic pressure is supplied from both the control valves 112 and 113. Fail-safe valves 114 and 115 that shut off both of the oil passages to the brakes B1 and B2 when an abnormality is supplied, and an accumulator 116 provided in the oil passage between the fail-safe valves 114 and 115 and the brakes B1 and B2. 117.

  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 includes an ignition signal from an ignition switch 80, a shift position SP from a shift position sensor 82 that detects the operation position of the shift lever 81, and an accelerator pedal position sensor 84 that detects the amount of depression of the accelerator pedal 83. From the hydraulic switch 120 that is turned on and off by the line pressure in the hydraulic circuit 100, the brake pedal position BP from the brake pedal position sensor 86 that detects the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 88, and the line pressure in the hydraulic circuit 100 The hydraulic pressure switch that is turned on / off by the line pressure PL, the oil temperature To from the temperature sensor 121 that detects the temperature of the oil pumped by the mechanical pump 102 or the electric pump 104, and the hydraulic pressure acting on the brake B1. Brake pressure Pb1 from 122, brake pressure from a hydraulic switch 123 that turns on and off by hydraulic pressure acting on the brake B2 Pb2, such as the terminal voltage Vc of the smoothing capacitor 54 from voltage sensor 55a is input through the input port. Further, the hybrid electronic control unit 70 outputs a drive signal to the three-way solenoid 105 and the linear solenoids 110 and 111, a cutoff signal to the circuit breaker 56, and the like via an output port. 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 operation mode for driving and controlling the motor MG1 and the motor MG2 so that the torque is converted by the motor MG1 and the motor MG2 and output to the ring gear shaft 32a, and the required power and the power required for charging and discharging the battery 50. The engine 22 is operated and controlled so that suitable 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 and integration mechanism 30, the motor MG1, and the motor. The required power is converted to the ring gear shaft 32 with torque conversion by MG2. Charge / discharge operation mode in which the motor MG1 and the motor MG2 are driven and controlled to be output to each other, and a motor operation mode in which the operation of the engine 22 is stopped and the power corresponding to the required power from the motor MG2 is output to the ring gear shaft 32a. and so on.

  Further, in the hybrid vehicle 20 of the embodiment, when charging / discharging of the battery 50 is prohibited due to damage of the battery 50 or other reasons, the battery 50 is disconnected from the power line 54 by the circuit breaker 56, and is within the capacity range of the smoothing capacitor 55. Then, the engine 22 and the motors MG1, MG2 are driven and controlled, and torque based on the required torque is output to the ring gear shaft 32a as a drive shaft to travel. That is, basically, a part of the motive power output from the engine 22 is output by outputting the required torque to the ring gear shaft 32a with the power-power and power-power conversion by the motors MG1 and MG2. In response to the change in the required torque, the torque corresponding to the required torque is output to the ring gear shaft 32a along with charging / discharging of the smoothing capacitor 55 within the capacity range of the smoothing capacitor 55 to travel. Hereinafter, this traveling is referred to as battery-less traveling.

  Next, the operation when the drive restriction of the motor MG2 is imposed while the hybrid vehicle 20 of the embodiment is performing the batteryless traveling will be described. FIG. 4 is a flowchart illustrating an example of a batteryless travel control routine executed by the hybrid electronic control unit 70 of the embodiment when performing batteryless travel. This routine is repeatedly executed every predetermined time (for example, every several msec).

  When the batteryless travel control routine is executed, first, the CPU 72 of the hybrid electronic control unit 70 first determines the accelerator opening Acc from the accelerator pedal position sensor 84, the vehicle speed V from the vehicle speed sensor 88, and the rotational speed of the motors MG1 and MG2. A process of inputting data required for control such as the terminal voltage Vc of the smoothing capacitor 55 from the Nm1, Nm2, voltage sensor 55a is executed (step S100). Here, the rotational speeds Nm1 and Nm2 of the motors MG1 and MG2 are input from the motor ECU 40 by communication from those calculated based on the rotational positions of the rotors of the motors MG1 and MG2 detected by the rotational position detection sensors 43 and 44. To do.

  When the data is input in this way, the required torque Tr * to be output to the ring gear shaft 32a as the drive shaft connected to the drive wheels 39a, 39b as the torque required for the vehicle based on the input accelerator opening Acc and the vehicle speed V. And the required power Pe * required for the engine 22 is set (step S110). In the embodiment, the required torque Tr * is determined in advance by storing the relationship between the accelerator opening Acc, the vehicle speed V, and the required torque Tr * in the ROM 74 as a required torque setting map, and the accelerator opening Acc, the vehicle speed V, , The corresponding required torque Tr * is derived and set from the stored map. FIG. 5 shows an example of the required torque setting map. The required power Pe * can be calculated as the sum of the loss Loss obtained by multiplying the set required torque Tr * by the rotational speed Nr of the ring gear shaft 32a. The rotational speed Nr of the ring gear shaft 32a can be obtained by multiplying the vehicle speed V by a conversion factor k, or can be obtained by dividing the rotational speed Nm2 of the motor MG2 by the gear ratio Gr of the transmission 60.

  Based on the set required power Pe *, a target rotational speed Ne * and a target torque Te * of the engine 22 are set (step S120). This setting is performed based on an operation line for efficiently operating the engine 22 and the required power Pe *. FIG. 6 shows an example of the operation line of the engine 22 and how the target rotational speed Ne * and the target torque Te * are set. As shown in the figure, the target rotational speed Ne * and the target torque Te * can be obtained from the intersection of the operation line and a curve with a constant required power Pe * (Ne * × Te *).

  Subsequently, when the target torque Te * is output from the engine 22 using the gear ratio ρ of the power distribution and integration mechanism 30, the torque (ρ · Te * / (1 + ρ) to be output as a reaction force by the motor MG1 is output from the motor MG1. Is set as the torque command Tm1 * (step S130), and the set torque command Tm1 * is multiplied by the rotational speed Nm1 of the motor MG1 to calculate the power Pm1 generated or consumed by the motor MG1 (step S140). A torque obtained by dividing the calculated electric power Pm1 by the rotation speed Nm2 of the motor MG2 and the correction torque Tvc is set as a torque command Tm2 * of the motor MG2 (step S150), where the correction torque Tvc is the smoothing capacitor 55. Torque that is adjusted so that the terminal voltage Vc is equal to or lower than the withstand voltage. The difference between the lower reference voltage than the terminal voltage Vc and the breakdown voltage of the capacitor 55 can be obtained by multiplying the proportional gain.

  When the target rotational speed Ne * and target torque Te * of the engine 22 and the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are set in this manner, the target rotational speed Ne * and the target torque Te * are transmitted to the engine ECU 24 with the torque command Tm1. * And Tm2 * are transmitted to the motor ECU 40 (step S160). The engine ECU 24 that has received the target rotational speed Ne * and the target torque Te * performs fuel injection control, ignition control, and intake air amount control so that the engine 22 is operated at an operating point based on the target rotational speed Ne * and the target torque Te *. And so on. The motor ECU 40 that has received the torque commands Tm1 * and Tm2 * controls the switching elements of the inverters 41 and 42 so that the motor MG1 is driven by the torque command Tm1 * and the motor MG2 is driven by the torque command Tm2 *. To do. FIG. 7 is a collinear diagram showing a dynamic relationship between the rotational speed and torque in the rotating element of the power distribution and integration mechanism 30 during battery running. In the figure, the left S-axis indicates the rotation speed of the sun gear 31 that is the rotation speed Nm1 of the motor MG1, the C-axis indicates the rotation speed of the carrier 34 that is the rotation speed Ne of the engine 22, and the R-axis indicates the rotation speed of the motor MG2. The rotational speed Nr of the ring gear 32 obtained by dividing the number Nm2 by the gear ratio Gr of the reduction gear 35 is shown. Two thick arrows on the R axis indicate the torque transmitted from the engine 22 to the ring gear shaft 32a when the engine 22 is operated at the operation point of the target rotational speed Ne * and the target torque Te *. The torque Tm2 * output from the motor MG2 indicates the torque acting on the ring gear shaft 32a via the reduction gear 35.

  Next, it is determined whether or not the drive restriction of the motor MG2 is made (step S170). When the drive restriction of the motor MG2 is not made, the process returns to step S100. That is, when the drive of the motor MG2 is not restricted, the processes of steps S100 to S160 are repeatedly executed. As a result, even when the battery 50 is disconnected from the power line 54 by the circuit breaker 56, the requested torque Tr * requested by the driver can be output within the range of the withstand voltage of the smoothing capacitor 55 and can travel. Here, the drive limitation of the motor MG2 is performed, for example, when an abnormality of the transmission 60 is detected. As an abnormality of the transmission 60, when both the hydraulic switch 122 and the hydraulic switch 123 are turned off and both the brake B1 and the brake B2 are turned off, or because the line pressure PL from the hydraulic switch 120 is lower than the threshold value, the transmission For example, when 60 cannot sufficiently transmit power from the motor MG2. Therefore, as an abnormality of the transmission 60, when the line pressure PL is lowered due to insufficient discharge amount of the oil pumped by the mechanical pump 102 or the electric pump 104 from the mechanical pump 102 or the electric pump 104, This includes the case where the transmission capacity of the power of the motor MG2 by the transmission 60 is reduced. When such an abnormality in the transmission 60 occurs, the power from the motor MG2 cannot be transmitted to the ring gear shaft 32a as a drive shaft, and thus the drive of the motor MG2 is limited. In many cases, the drive limitation in this case is usually prohibited from torque output from the motor MG2.

  If it is determined in step S170 that the drive of the motor MG2 is limited, the operation of the engine 22 is stopped and the drive of the motors MG1 and MG2 is stopped (step S180), and the system is ready-off to stop ( Step S190), this routine is finished. That is, the traveling is stopped and the system is stopped. This is because it becomes difficult to balance the power when the drive of the motor MG2 is restricted, and other devices connected to the power system connected to the motor MG1 and the motor MG2 via the inverters 41 and 42 are damaged. Because there is a fear.

  According to the hybrid vehicle 20 of the embodiment described above, when the drive restriction of the motor MG2 is made during the battery-less travel, the operation of the engine 22 is stopped and the drive of the motors MG1 and MG2 is stopped. Since the traveling is stopped and ready-off is performed, it is possible to suppress damage to other devices connected to the power system connected to the motor MG1 and the motor MG2 via the inverters 41 and 42. That is, it is possible to cope with the situation more appropriately when the drive restriction of the motor MG2 is made during the battery-less traveling.

  In the hybrid vehicle 20 of the embodiment, when the drive restriction of the motor MG2 is performed during the battery-less traveling, the operation of the engine 22 is stopped and the driving of the motors MG1 and MG2 is stopped to stop the traveling. Further, although the ready-off operation is performed, the operation of the engine 22 is stopped, the driving of the motors MG1 and MG2 is stopped, and the traveling is stopped. Further, the motors MG1 and MG2 are stopped from driving, but the operation of the engine 22 may not be stopped. In this case, when the inverter 41 is stopped, the motor MG1 is rotated and a counter electromotive force is generated. Therefore, the switching element of the inverter 41 may be controlled so that torque output from the motor MG1 is not performed.

  In the hybrid vehicle 20 of the embodiment, when the drive of the motor MG2 is restricted due to an abnormality of the transmission 60 during battery-less travel, the operation of the engine 22 is stopped and the drive of the motors MG1 and MG2 is stopped. However, during the battery-less running, the operation of the engine 22 is also stopped when the drive of the motor MG2 is restricted due to a factor other than an abnormality of the transmission 60. At the same time, the driving of the motors MG1 and MG2 may be stopped to stop traveling, and may be ready-off. In this case, the transmission 60 may not be provided.

  In the hybrid vehicle 20 of the embodiment, the power of the motor MG2 is shifted by the reduction gear 35 and output to the ring gear shaft 32a. However, as illustrated in the hybrid vehicle 120 of the modified example of FIG. May be connected to an axle (an axle connected to the wheels 64a and 64b in FIG. 8) different from an axle to which the ring gear shaft 32a is connected (an axle to which the drive wheels 63a and 63b are connected).

  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 63a and 63b 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 63a and 63b. 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.

  In addition, it is not limited to those applied to such hybrid vehicles, but is incorporated into non-moving equipment such as forms of power output devices mounted on moving bodies such as vehicles other than automobiles, ships, and aircraft, and construction equipment. A power output device may be used. Further, it may be in the form of a drive device that includes the motor MG1, the motor MG2, the power distribution and integration mechanism 30, and the hybrid electronic control unit 70 that are incorporated in the power output device together with the engine 22 and the battery 50. Furthermore, it is good also as a form of the control method of such a power output device or a drive device.

  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 manufacturing industries such as power output devices, drive devices, and vehicles.

1 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 20 equipped with a power output apparatus as an embodiment of the present invention. FIG. 3 is a configuration diagram showing an outline of a configuration of a transmission 60. 1 is a configuration diagram showing an outline of the configuration of a hydraulic circuit 100. FIG. It is a flowchart which shows an example of the battery-less driving | running | working control routine performed by the electronic control unit 70 for hybrids of an Example. It is explanatory drawing which shows an example of the map for request | requirement torque setting. It is explanatory drawing which shows a mode that an example of the operating line of the engine 22, and target rotational speed Ne * and target torque Te * are set. It is explanatory drawing which shows an example of the alignment chart for demonstrating dynamically the rotational element of the power distribution integration mechanism 30 in the middle of battery-less driving | running | working. 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 drive wheel, 39c, 39d wheel, 40 electronic control unit for motor (motor ECU), 41, 42 inverter, 43, 44 rotational position detection sensor, 50 battery, 52 for battery Electronic control unit (battery ECU), 54 power line, 55 smoothing capacitor, 55a voltage sensor, 56 circuit breaker, 60 transmission, 60a planetary gear mechanism of double pinion, 60b planetary tooth of single pinion Mechanism, 61 sun gear, 62 ring gear, 63a first pinion gear, 63b second 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, 100 hydraulic circuit, 102 mechanical pump, 103 motor, 104 electric Pump, 105 3-way solenoid, 106 pressure control valve, 108 modulator valve, 110, 111 linear solenoid, 11 , 113 control valves, 114 and 115 fail-safe valve, 116 and 117 the accumulator, 121 a temperature sensor, 120,122,123 hydraulic switch, MG1, MG2 motor, B1, B2 brake.

Claims (11)

A power output device that outputs power to a drive shaft,
An internal combustion engine;
An electric power motive power input / output means connected to the output shaft of the internal combustion engine and the drive shaft for inputting / outputting power to / from the output shaft and the drive shaft together with input / output of electric power and motive power;
An electric motor capable of inputting and outputting power to the drive shaft;
A power storage means capable of exchanging power with the electric power drive input / output means and the electric motor;
Required driving force setting means for setting required driving force required for the drive shaft;
The internal combustion engine and the electric power power input / output unit are configured such that the driving force based on the set required driving force is output to the drive shaft without charging / discharging the power storage unit without charging / discharging the power storage unit. And the internal combustion engine so that the driving of the electric power drive input / output means and the electric motor is stopped when the electric motor is limited during the non-charge / discharge control for controlling the electric motor and the electric motor. Control means for controlling the power drive input / output means and the electric motor;
A power output device comprising: The power output device according to claim 1,
Shift transmission means for transmitting power between the rotating shaft of the electric motor and the drive shaft with a change in gear ratio;
Drive limit setting means for setting a drive limit of the electric motor based on an abnormality of the shift transmission means;
A power output device comprising: The power output device according to claim 2,
The shift transmission means is a means that operates using a pressurized working fluid,
The drive restriction setting means is means for setting a drive restriction of the electric motor based on the pressure of the working fluid.   3. The power output apparatus according to claim 2, wherein the drive restriction setting means is means for setting a drive restriction of the electric motor based on a degree of power transmission in the shift transmission means. The power output device according to any one of claims 1 to 4,
A drive circuit for driving the power drive input / output means and the electric motor;
In the non-charge / discharge control, the control means is configured so that a driving force based on the set required driving force is output to the driving shaft with a power balance within a capacity range of elements that can be stored in the driving circuit. A power output device which is a means for controlling an internal combustion engine, the power power input / output means and the electric motor.   The control means is means for controlling the internal combustion engine to stop the operation of the internal combustion engine when the drive restriction of the electric motor is performed while the non-charge / discharge control is being executed. The power output device according to any one of the above.   The power power input / output means is connected to the three shafts of the output shaft, the drive shaft, and the third shaft of the internal combustion engine, and the remaining shaft based on the power input / output to any two of the three shafts. The power output apparatus according to any one of claims 1 to 6, further comprising: a three-axis power input / output means for inputting / outputting power to / from the power generator and a generator for inputting / outputting power to / from the third shaft.   A vehicle on which the power output device according to claim 1 is mounted and an axle is connected to the drive shaft. A drive device incorporated in a power output device including an internal combustion engine and power storage means,
It is connected to the power storage means so that electric power can be exchanged and connected to the output shaft and the drive shaft of the internal combustion engine, and power is input to the output shaft and the drive shaft with input and output of electric power and power. Power power input / output means to output;
An electric motor that is connected to the power storage means so that electric power can be exchanged and that can input and output power to the drive shaft;
The charging and discharging of the power storage means is prohibited, and the driving force based on the required driving force required for the drive shaft is output to the drive shaft without charging and discharging the power storage means, together with the control of the internal combustion engine, The electric power drive input / output means and the electric power drive input / output means so that the drive of the electric motor is stopped when the drive of the electric motor is restricted during the control of the electric power drive input / output means and the electric motor; Control means for controlling the electric motor;
A drive device comprising: An internal combustion engine; power power input / output means connected to an output shaft and a drive shaft of the internal combustion engine for inputting and outputting power to and from the output shaft and the drive shaft with input and output of power and power; and the drive A power output device control method comprising: an electric motor capable of inputting / outputting power to a shaft; and an electric power input / output means and an electric storage means capable of exchanging electric power with the electric motor,
The internal combustion engine and the power power so that a driving force based on a required driving force required for the drive shaft is output to the drive shaft without charging / discharging the power storage device without charging / discharging the power storage device. When the drive of the motor is restricted during the control of the input / output means and the electric motor, at least the internal combustion engine and the power power input are stopped so that the drive of the electric power input / output means and the electric motor is stopped. Controlling the output means and the electric motor;
A control method for a power output apparatus. Built in a power output device including an internal combustion engine and power storage means, and connected to the power storage means so as to be able to exchange power, and connected to the output shaft and drive shaft of the internal combustion engine to input and output power and power An electric power input / output means for inputting / outputting power to / from the output shaft and the drive shaft, and an electric motor connected to the power storage means so as to be able to exchange electric power and capable of inputting / outputting power to the drive shaft. A method for controlling a drive device comprising:
The charging and discharging of the power storage means is prohibited, and the driving force based on the required driving force required for the drive shaft is output to the drive shaft without charging and discharging the power storage means, together with the control of the internal combustion engine, The electric power drive input / output means and the electric power drive input / output means so that the drive of the electric motor is stopped when the drive of the electric motor is restricted during the control of the electric power drive input / output means and the electric motor; Controlling the motor;
A control method for a driving device.

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