JP3941769B2 - POWER OUTPUT DEVICE, ITS CONTROL METHOD, AND AUTOMOBILE - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress booming noise occurring when an engine is operated. <P>SOLUTION: When a drive request power P* comes within a booming noise area, the history of a drive request power P* is determined (step S140), the target power Pe of the engine is set to a threshold Pl, which is the lower limit value of the power in the booming noise area, or a threshold PH, which is the upper limit value, according to the determined history (step S150), and the target rotational speed Ne* and the target torque Te* of the engine are set based on the set target power Pe (step S160). Thus, since the engine can be operated at an operation point near a boundary between a booming noise occurring area apart from the center of the booming noise area and an area where booming noise does not occur, the occurrence of booming noise can be suppressed. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  The present invention relates to a power output apparatus, a control method thereof, and an automobile.

Conventionally, as this type of power output apparatus, an apparatus in which an engine, a continuously variable transmission, and a generator motor are connected using a planetary gear has been proposed (for example, see Patent Document 1). In this power output device, the engine is connected to the sun gear of the planetary gear, the generator motor is connected to the carrier, the continuously variable transmission is connected to the ring gear, and the engine is operated at a plurality of predetermined operation points on the operation line, thereby improving fuel efficiency. Or obtaining the driving force required by the driver.
JP 2001-112115 A (FIG. 11)

  However, in the above-described power output device, there may be a noise generation region where abnormal noise such as a soaring noise occurs on the operating line for operating the engine, and the engine is operated at an operation point within this noise generation region. Then, abnormal noise may occur. Such abnormal noise gives a sense of incongruity to a driver of an automobile or the like equipped with a power output device equipped with an engine, and is desirably suppressed as much as possible.

  The power output device, the control method thereof, and the automobile of the present invention are intended to suppress the generation of abnormal noise such as a booming noise.

  In order to achieve the above-described object, the power output apparatus, the control method thereof, and the automobile of the present invention employ the following means.

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;
An electric power drive input / output means connected to the output shaft of the internal combustion engine and the drive shaft, and outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric 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 power setting means for setting required power required for the drive shaft based on an operation by an operator;
An operating point setting means for setting an operating point of the internal combustion engine that outputs the set target power based on a predetermined constraint when a target power to be output from the internal combustion engine is set;
When setting the target power based on the set required power, when the operating point at which the target power to be set is determined based on the target power and the predetermined constraint is operating the internal combustion engine When the power is outside the booming sound region set as the region where the booming noise occurs, the power based on the set required power is set as the target power, and the target power to be set is the target power and the predetermined constraint. Target power setting means for setting, as a target power, a power that is in the vicinity of the booming sound region boundary based on the progress of the setting of the target power when the operation point obtained based on
Control means for controlling the internal combustion engine, the power power input / output means, and the electric motor so that the internal combustion engine is operated at the set operating point and power based on the required power is output to the drive shaft; ,
It is a summary to provide.

  In the first power output device of the present invention, when setting the target power based on the set required power, the operating point at which the target power to be set is determined based on the target power and a predetermined constraint is the internal combustion engine. When the power is outside the booming noise range that is set as the area where the noise is generated when the engine is operated, the power based on the set required power is set as the target power, and the target power to be set is the target power and the predetermined power. When the driving point obtained based on the constraints of the power is within the muffled sound area, the power within the muffled sound area boundary is set as the target power based on the progress of the target power setting, and this setting was made The internal combustion engine is operated at the operating point set using the target power, and power based on the required power is output to the drive shaft. Yo controlling an internal combustion engine and an electric power-mechanical power input output means and the electric motor. As a result, it is possible to suppress the generation of abnormal noise such as a booming noise. Of course, power based on the required power can be output to the drive shaft.

  In the first power output apparatus of the present invention, the target power setting means operates the internal combustion engine at an operating point where the target power to be set is obtained based on the target power and the predetermined constraint. From the state below the first power corresponding to the lower limit that falls within the booming sound area set as the area where the loud sound sometimes occurs, to the second power that corresponds to the upper limit that falls within the booming sound area. 1 is a means for setting a power of 1 as a target power, and setting the second power as a target power until the target power to be set reaches the first power from a state in which the target power to be set reaches or exceeds the second power. It can also be. In this way, the target power can have hysteresis.

  In such a first power output apparatus of the present invention, the power output device further includes required power setting means for setting required power to charge / discharge the power storage means, and the target power setting means is configured to set the set required power and the set power demand. The target power may be set based on the required power. By so doing, it is possible to set the target power based on the required power and the required power for charging and discharging the power storage means.

The second power output device of the present invention is:
A power output device that outputs power to a drive shaft,
An internal combustion engine;
An electric power drive input / output means connected to the output shaft of the internal combustion engine and the drive shaft, and outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric 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 power setting means for setting required power required for the drive shaft based on an operation by an operator;
Target power setting means for setting target power to be output from the internal combustion engine based on the set required power;
An operating point setting means for setting an operating point of the internal combustion engine based on the set target power, a predetermined constraint, and a request for noise during operation of the internal combustion engine;
The internal combustion engine, the electric power drive input / output means, and the electric motor are controlled so that the internal combustion engine is operated by the set operation point and power based on the set required power is output to the drive shaft. Control means;
It is a summary to provide.

  In the second power output device of the present invention, the target power to be output from the internal combustion engine is set based on the required power in accordance with the operation of the operator, and the set target power, predetermined constraints, and operation of the internal combustion engine are set. The operating point of the internal combustion engine is set based on the demand for noise at the time. Then, the internal combustion engine, the power drive input / output means, and the electric motor are controlled so that the internal combustion engine is operated at the set operation point and the power based on the set required power is output to the drive shaft. As a result, noise during operation of the internal combustion engine can be suppressed. Of course, power based on the required power can be output to the drive shaft. Here, as a request for noise, a request can be considered that the internal combustion engine is not operated within a booming noise region set as a region where a booming noise is generated when the internal combustion engine is operated.

  In the first or second power output apparatus of the present invention, the predetermined constraint may be a constraint for efficiently operating the internal combustion engine. In this way, the internal combustion engine can be operated efficiently.

  In the first or second power output apparatus of the present invention, the power power input / output means is connected to three shafts of the output shaft, the drive shaft, and the third shaft of the internal combustion engine, A means comprising: a three-axis power input / output means for inputting / outputting power to the remaining shaft based on power input / output to / from any of the two axes; and a generator for inputting / outputting power to / from the third shaft. The power / power input / output means may include a first rotor attached to the output shaft of the internal combustion engine and a second rotor attached to the drive shaft. It is a counter-rotor motor that outputs at least part of the power from the internal combustion engine to the drive shaft with input / output of electric power by electromagnetic action between the first rotor and the second rotor. You can also.

  The automobile of the present invention is the first or second power output device of the present invention according to any one of the aspects described above, that is, basically a power output device that outputs power to the drive shaft, An electric power drive input / output means connected to the output shaft of the internal combustion engine and the drive shaft and outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric power; and the drive shaft An electric motor capable of inputting / outputting power to the motor, an electric power input / output means, an electric storage means capable of exchanging electric power with the electric motor, and a request for setting required power required for the drive shaft based on an operation of an operator Motive power setting means, and when a target power to be output from the internal combustion engine is set, an operating point setting means for setting an operating point of the internal combustion engine that outputs the set target power based on a predetermined constraint, Above When the target power is set based on the determined required power, the target power to be set is stored when the operating point obtained based on the target power and the predetermined constraint is operated on the internal combustion engine. When the power is outside the booming sound region set as the region where the sound is generated, the power based on the set required power is set as the target power, and the target power to be set is the target power and the predetermined constraint. Target power setting means for setting, as the target power, the power that is in the vicinity of the booming sound region boundary based on the progress of the setting of the target power when the operation point obtained based on the power is within the booming sound region, The internal combustion engine is operated at a set operating point, and power based on the required power is output to the drive shaft. A control means for controlling the internal combustion engine, the power power input / output means and the electric motor, and a power output apparatus for outputting power to a drive shaft. An internal combustion engine, and an electric power drive input / output means connected to the output shaft of the internal combustion engine and the drive shaft, and outputting at least part of the power from the internal combustion engine to the drive shaft with input / output of electric 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 power required for the drive shaft based on an operation of an operator. Required power setting means for setting, target power setting means for setting target power to be output from the internal combustion engine based on the set required power, the set target power, predetermined constraints, and the internal combustion engine When driving Operating point setting means for setting an operating point of the internal combustion engine based on a request for noise in the engine, and the internal combustion engine is operated by the set operating point and power based on the set required power is driven. A second power output device of the present invention is provided, comprising a control means for controlling the internal combustion engine, the power power input / output means and the electric motor to be output to a shaft, and an axle is connected to the drive shaft. The gist of this is

  Since the vehicle according to the present invention is equipped with the first or second power output device of the present invention according to any one of the aspects described above, the effects of the first or second power output device of the present invention, for example, Similar to the effect of suppressing the generation of abnormal noise such as booming noise, the effect of suppressing noise during operation of the internal combustion engine, the effect of outputting power based on the required power required for the drive shaft, etc. Can produce various effects.

The control method of the first power output device of the present invention is:
An internal combustion engine, and an electric power input / output means connected to the output shaft and the drive shaft of the internal combustion engine for outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric power; A control method of a power output device comprising: an electric motor capable of inputting / outputting power to / from a drive shaft; and an electric power power input / output means and a power storage means capable of exchanging electric power with the electric motor, and outputting power to the drive shaft. There,
(A) setting required power required for the drive shaft based on the operation of the operator;
(B) When setting the target power based on the set required power, when the operating point at which the target power to be set is determined based on the target power and a predetermined constraint operates the internal combustion engine In the case of power that is outside the region where the noise is generated, a power based on the set required power is set as a target power, and the target power to be set is the target power and the predetermined power. When the driving point determined based on the constraints is the power that falls within the booming sound area, the power that is within the booming sound area boundary is set as the target power based on the progress of setting the target power,
(C) setting an operating point of the internal combustion engine that outputs the set target power based on the predetermined constraint;
(D) controlling the internal combustion engine, the power power input / output means, and the electric motor so that the internal combustion engine is operated at the set operating point and power based on the required power is output to the drive shaft. This is the gist.

  According to the control method for the first power output apparatus of the present invention, when setting the target power based on the set required power, the target power to be set is obtained based on the target power and a predetermined constraint. If the operating point is a power that is outside the booming noise region that is set as the region where the noise is generated when the internal combustion engine is operated, the power based on the set required power is set as the target power and the target power to be set When the driving point obtained based on the target power and a predetermined constraint is a power that falls within the muffled sound area, the power that is within the muffled sound area boundary is set as the target power based on the progress of setting the target power, The internal combustion engine is operated at the operating point set using the target power set in this way, and power based on the required power is driven. Controlling an internal combustion engine and an electric power-mechanical power input output means and the electric motor so as to be output to the shaft. By so doing, it is possible to suppress the generation of abnormal sounds such as a booming sound. Of course, power based on the required power required for the drive shaft can be output.

The control method of the second power output device of the present invention is:
An internal combustion engine, and an electric power input / output means connected to the output shaft and the drive shaft of the internal combustion engine for outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric power; A control method of a power output device comprising: an electric motor capable of inputting / outputting power to / from a drive shaft; and an electric power power input / output means and a power storage means capable of exchanging electric power with the electric motor, and outputting power to the drive shaft. There,
(A) setting required power required for the drive shaft based on the operation of the operator;
(B) setting a target power to be output from the internal combustion engine based on the set required power;
(C) setting an operating point of the internal combustion engine based on the set target power, predetermined constraints, and a request for noise during operation of the internal combustion engine;
(D) controlling the internal combustion engine, the power power input / output means, and the electric motor so that the internal combustion engine is operated at the set operation point and power based on the required power is output to the drive shaft. Is the gist.

  According to the control method of the second power output apparatus of the present invention, the target power to be output from the internal combustion engine is set based on the required power corresponding to the operation of the operator, and the set target power and the predetermined restriction are set. And setting the operating point of the internal combustion engine based on the demand for noise during operation of the internal combustion engine so that the internal combustion engine is operated at the set operating point and the power based on the set required power is output to the drive shaft Since the internal combustion engine, the power drive input / output means and the electric motor are controlled, noise during operation of the internal combustion engine can be suppressed. Of course, power based on the required power can be output to the drive shaft. Here, as a request for noise, a request can be considered that the internal combustion engine is not operated within a booming noise region set as a region where a booming noise is generated when the internal combustion engine is operated.

  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 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 reduction gear 35 attached to a ring gear shaft 32a as a drive shaft connected to the power distribution and integration mechanism 30, a motor MG2 connected to the reduction gear 35, And a hybrid electronic control unit 70 for controlling the entire apparatus.

  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 receives signals from various sensors (not shown) such as a crank position sensor attached to the crankshaft 26. Further, the engine ECU 24 communicates 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 transmits data on the operation state of the engine 22 as necessary for the hybrid. Output to the electronic control 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 reduction gear 35 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 finally output from the ring gear shaft 32a to the drive wheels 63a and 63b of the vehicle via the gear mechanism 60 and the differential gear 62.

  The motor MG1 and the motor MG2 are both 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 electrode bus and a negative electrode bus shared by the inverters 41 and 42, and the electric power generated by one of the motors MG1 and MG2 It can be consumed by a motor. Therefore, battery 50 is charged / discharged by electric power generated from one of motors MG1 and MG2 or insufficient electric power. If the balance of electric power is balanced by the motors MG1 and MG2, the battery 50 is not charged / discharged. 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 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 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 the 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 Tb from the temperature sensor 51 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 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. The accelerator pedal opening Acc from the vehicle, the brake pedal position BP from the brake pedal position sensor 86 for detecting the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 88, and the like are input via the input 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 the communication port, and exchanges various control signals and data with the engine ECU 24, the motor ECU 40, and the battery ECU 52. ing.

  The hybrid vehicle 20 according to the embodiment calculates a 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. The operation of the engine 22, the motor MG1, and the motor MG2 is controlled so that the required power corresponding to the 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.

  Next, the operation of the hybrid vehicle 20 of the embodiment configured as described above, particularly the operation of the drive control when avoiding the generation of a noise when driving the engine 22 will be described. FIG. 2 is a flowchart illustrating an example of a drive control routine executed by the hybrid electronic control unit 70 according to the embodiment. This routine is repeatedly executed every predetermined time (for example, every 8 msec).

  When the drive 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, the rotational speed Nm1, of the motors MG1, MG2. A process of inputting data necessary for control such as Nm2 and input / output limits Win and Wout of the battery 50 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. The input / output limits Win and Wout of the battery 50 are set from the battery ECU 52 by communication from the battery temperature Tb detected by the temperature sensor 51 and the remaining capacity (SOC) of the battery 50 by communication. To do. Here, the input / output limits Win and Wout of the battery 50 set the basic values of the input / output limits Win and Wout based on the battery temperature Tb, and the output limiting correction coefficient based on the remaining capacity (SOC) of the battery 50. It is possible to set the input restriction correction coefficient and multiply the basic value of the set input / output restriction Win, Wout by the correction coefficient to set the input / output restriction Win, Wout. FIG. 3 shows an example of the relationship between the battery temperature Tb and the input / output limits Win, Wout, and FIG. 4 shows an example of the relationship between the remaining capacity (SOC) of the battery 50 and the correction coefficients of the input / output limits Win, Wout.

  When the data is input in this way, the required torque T * to be output to the ring gear shaft 32a as the drive shaft connected to the drive wheels 63a, 63b as the torque required for the vehicle based on the input accelerator opening Acc and the vehicle speed V. And the drive required power P * to be output from the engine 22 are set (step S110). In the embodiment, the required torque T * is determined in advance by storing the relationship between the accelerator opening Acc, the vehicle speed V, and the required torque T * in the ROM 74 as a required torque setting map. , The corresponding required torque T * is derived and set from the stored map. FIG. 5 shows an example of the required torque setting map. The required drive power P * can be calculated as the set required torque T * multiplied by the rotation speed Nr of the ring gear shaft 32a plus the required charge / discharge amount Pb * of the battery 50. The rotation speed Nr of the ring gear shaft 32a can be obtained by multiplying the vehicle speed V by the conversion factor k, or can be obtained by dividing the rotation speed Nm2 of the motor MG2 by the gear ratio Gr of the reduction gear 35. The required charge / discharge amount Pb * can be set by the remaining capacity (SOC) of the battery 50, the accelerator opening Acc, and the like.

  Next, it is determined whether or not the set drive request power P * is within a range represented by the threshold value PL and the threshold value PH (step S120). Here, the threshold value PL and the threshold value PH are generated when the operating point of the engine 22 set based on the operation line for efficiently operating the engine 22 and the drive request power P * operates the engine 22. It shows the upper limit value and the lower limit value of the power of the engine 22 when it falls within the booming sound region set as the region. An example of the operation line of the engine 22 and the booming sound area is shown in FIG. As shown in the figure, the threshold value PL and the threshold value PH are set as a lower limit value and an upper limit value of power at the intersection line between the operation line and the booming sound area.

  If a negative result is obtained in step S120, it is determined that no booming noise is generated even if the engine 22 is operated at the required drive power P *, and the required drive power P * is set as the target power Pe * of the engine 22. Then, the target rotational speed Ne * and the target torque Te * of the engine 22 are set based on the set target power Pe * (step S160). This setting is performed based on the operation line for efficiently operating the engine 22 illustrated in FIG. 6 and the target power Pe *. 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 target power Pe * (Ne * × Te *). As described above, the target rotation Ne * and the target torque Te * of the engine 22 are restricted so as to be the rotational speed and torque of the operation line that allows the engine 22 to operate efficiently.

  Subsequently, using the set target rotational speed Ne *, the rotational speed Nr (Nm2 / Gr) of the ring gear shaft 32a, and the gear ratio ρ of the power distribution and integration mechanism 30, the target rotational speed Nm1 of the motor MG1 is given by the following equation (1). * Is calculated and a torque command Tm1 * of the motor MG1 is calculated by equation (2) based on the calculated target rotational speed Nm1 * and the current rotational speed Nm1 (step S170). Here, Expression (1) is a dynamic relational expression for the rotating element of the power distribution and integration mechanism 30. FIG. 7 is a collinear diagram showing a dynamic relationship between the number of rotations and torque in the rotating elements of the power distribution and integration mechanism 30. 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 multiplying the number Nm2 by the gear ratio Gr of the reduction gear 35 is shown. Expression (1) can be easily derived by using this alignment chart. The two thick arrows on the R axis indicate that torque Te * output from the engine 22 when the engine 22 is normally operated at the operation point of the target rotational speed Ne * and the target torque Te * is transmitted to the ring gear shaft 32a. Torque and torque that the torque Tm2 * output from the motor MG2 acts on the ring gear shaft 32a via the reduction gear 35. Expression (2) is a relational expression in feedback control for rotating the motor MG1 at the target rotational speed Nm1 *. In Expression (2), “k1” in the second term on the right side is a gain of a proportional term. “K2” in the third term on the right side is the gain of the integral term.

Nm1 * ＝ Ne * ・ (1 + ρ) / ρ−Nm2 / (Gr ・ ρ) (1)
Tm1 * = previous Tm1 * + k1 (Nm1 * −Nm1) + k2∫ (Nm1 * −Nm1) dt (2)

  When the target rotational speed Nm1 * and the torque command Tm1 * of the motor MG1 are thus calculated, the input / output limits Win and Wout of the battery 50 and the calculated torque command Tm1 * of the motor MG1 are multiplied by the current rotational speed Nm1 of the motor MG1. By dividing the deviation from the power consumption (generated power) of the obtained motor MG1 by the rotational speed Nm2 of the motor MG2, torque limits Tin and Tout as upper limits of torque that may be input / output from the motor MG2 are expressed by the following equation (3). And (4) (step S180), and using the required torque T *, torque command Tm1 * and the gear ratio ρ of the power distribution and integration mechanism 30, a temporary motor torque Tm2tmp as a torque to be output from the motor MG2 is obtained. Calculated by equation (5) (step S190), calculated torque limit Tout and temporary motor torque Setting the larger torque when compared with the torque limit Tin calculated with torque smaller when comparing m2tmp as the torque command Tm2 * of the motor MG2 (step S200). By setting the torque command Tm2 * of the motor MG2 in this way, the required torque T * output to the ring gear shaft 32a as the drive shaft is set as a torque limited within the range of the input / output limits Win and Wout of the battery 50. can do. Equation (5) can be easily derived from the collinear diagram of FIG. 7 described above.

Tin = (Win−Tm1 * ・ Nm1) / Nm2 (3)
Tout = (Wout−Tm1 * ・ Nm1) / Nm2 (4)
Tm2tmp = (T * + Tm1 * / ρ) / Gr (5)

  When the target rotational speed Ne * and target torque Te * of the engine 22 and the target rotational speed Nm1 * and torque command Tm1 * of the engine MG1 and the torque command Tm2 * of the motor MG2 are thus set, the target rotational speed Ne * and the target of the engine 22 are set. The torque Te * is transmitted to the engine ECU 24, and the target rotational speed Nm1 *, torque command Tm1 *, and torque command Tm2 * of the motor MG2 are transmitted to the motor ECU 40 (step S210), and this routine is terminated. The engine ECU 24 that has received the target rotational speed Ne * and the target torque Te * of the engine 22 performs fuel in the engine 22 so that the engine 22 is operated at the operating point indicated by the target rotational speed Ne * and the target torque Te *. Controls such as injection control and ignition control are performed. The motor ECU 40 that has received the target rotational speed Nm1 *, the torque command Tm1 *, and the torque command Tm2 * drives the inverter 41 so that the motor MG1 is driven by the torque command Tm1 * and the motor MG2 is driven by the torque command Tm2 *. , 42 is switched.

  In this way, when the engine 22 is operated at the required drive power P * and no humming noise is generated, the operation line in which the engine 22 can be efficiently operated with respect to the target rotational speed Ne * and the target torque Te * of the engine 22 is set. Since the restriction is imposed so that the rotational speed and the torque are set, the engine 22 can be efficiently operated and the power required by the driver can be output to the ring gear shaft 32a mechanically connected to the drive shaft.

  On the other hand, when an affirmative result is obtained in step S120, it is determined that a booming noise is generated when the engine 22 is operated at the drive request power P *. First, the drive request power set in the control routine before the execution of this routine is performed. The history of the drive required power P * is determined using P * (step S140), and the target power Pe * of the engine 22 is set using the target power setting map (step S150). Here, the target power setting map is obtained as a relationship between the drive request power P * and the target power Pe * at the drive request power P *, and FIG. 8 shows an example thereof. In this target power setting map, the threshold PL is set to the target power Pe * when the drive required power P * is from the state below the threshold PL to the threshold PH (path 1), and the drive required power P * is the threshold. In the state from the state above PH to the threshold value PL (path 2), the threshold value PH is set to the target power Pe *. That is, the target power Pe * is set to a power corresponding to the lower limit or the upper limit in the booming sound area.

  Subsequently, based on the target power Pe * set in this way, the processing after step S160 described above is executed, and this routine is terminated. Here, since the target power Pe * is set to be a power corresponding to the lower limit or the upper limit in the muffled sound region, the operation point of the engine 22 can be set to be a point away from the center of the muffled sound region. As a result, it is possible to suppress the generation of a booming sound. In addition, since the target rotational speed Ne * and the target torque Te * of the engine 22 are restricted so as to be the rotational speed and torque of the operation line in which the engine 22 can be operated efficiently, the fuel efficiency of the engine 22 is improved. Can be achieved.

  According to the hybrid vehicle 20 of the above-described embodiment, when a humming noise is generated when driving at the required driving power P * with restrictions on driving the engine 22 efficiently, the operating point of the engine 22 is set within the humming noise region. Therefore, the engine 22 can be operated at an operation point away from the center of the muffled sound area. As a result, it is possible to suppress the generation of a booming sound. In addition, the target rotational speed Ne * and the target torque Te * of the engine 22 are restricted so as to be the rotational speed and torque of the operation line in which the engine 22 can be operated efficiently, so that the fuel efficiency of the engine 22 is improved. Can do. On the other hand, if no noise is generated even when the engine 22 is operated at the required drive power P *, the rotation of the operation line that allows the engine 22 to operate efficiently with respect to the target rotational speed Ne * and the target torque Te * of the engine 22. Since restrictions are imposed so that the number and the torque become equal, the engine 22 can be efficiently operated and power based on the power required by the driver can be output to the ring gear shaft 32a mechanically connected to the drive shaft.

  In the hybrid vehicle 20 of the embodiment, when a booming noise is generated when the engine 22 is operated at the drive required power P *, the threshold value PL which is the lower limit value of the power within the booming noise region or the threshold value which is the upper limit value is set. The target power Pe * may be set in the vicinity of the boundary between the booming sound area and the area where no booming sound is generated. For example, the target power Pe * is set to be larger than the threshold value PL or the threshold value PH. It may be set to a value closer to the center of the muffled sound area than the value away from the center of the sound area or the threshold value PL or the threshold value PH.

  In the hybrid vehicle 20 of the embodiment, restrictions are imposed on the engine 22 so that the engine speed and torque can be efficiently operated, but other restrictions may be imposed.

  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. 9) 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.

  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 and the like.

1 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 20 according to an embodiment of the present invention. It is a flowchart which shows an example of the drive control routine performed by the electronic control unit for hybrids 70 of an Example. It is explanatory drawing which shows an example of the relationship between battery temperature Tb and input-output restrictions Win and Wout. It is explanatory drawing which shows an example of the relationship between the remaining capacity (SOC) of the battery 50, and the correction coefficient of input / output restrictions Win and Wout. It is explanatory drawing which shows an example of the map for request | requirement torque setting. It is explanatory drawing which shows an example of the operation line of an engine 22, and a booming sound area | region. 3 is a collinear diagram showing a dynamic relationship between the rotational speed and torque of each rotary element of the power distribution and integration mechanism 30. FIG. It is explanatory drawing which shows an example of a target power setting map. 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 , 35, reduction gear, 40 motor electronic control unit (motor ECU), 41, 42 inverter, 43, 44 rotational position detection sensor, 50 battery, 51 temperature sensor, 52 battery electronic control unit (battery ECU), 54 electric power Line, 60 gear mechanism, 62 differential gear, 63a, 63b, 64a, 64b drive wheel, 70 hybrid electronic control unit, 72 CPU, 74 ROM, 76 RAM, 80 ignition switch, 81 shift lever, 2 shift position sensor, 83 accelerator pedal, 84 an accelerator pedal position sensor, 85 brake pedal, 86 a brake pedal position sensor, 88 vehicle speed sensor, 230 pair-rotor motor, 232 an inner rotor 234 outer rotor, MG1, MG2 motor.

Claims (11)

A power output device that outputs power to a drive shaft,
An internal combustion engine;
An electric power drive input / output means connected to the output shaft of the internal combustion engine and the drive shaft, and outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric 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 power setting means for setting required power required for the drive shaft based on an operation by an operator;
An operating point setting means for setting an operating point of the internal combustion engine that outputs the set target power based on a predetermined constraint when a target power to be output from the internal combustion engine is set;
When setting the target power based on the set required power, when the operating point at which the target power to be set is determined based on the target power and the predetermined constraint is operating the internal combustion engine When the power is outside the booming sound region set as the region where the booming noise occurs, the power based on the set required power is set as the target power, and the target power to be set is the target power and the predetermined constraint. Target power setting means for setting, as a target power, a power that is in the vicinity of the booming sound region boundary based on the progress of the setting of the target power when the operation point obtained based on
Control means for controlling the internal combustion engine, the power power input / output means, and the electric motor so that the internal combustion engine is operated at the set operating point and power based on the required power is output to the drive shaft; ,
A power output device comprising:   The target power setting means is set as a region in which a muffler noise is generated when an operation point at which the target power to be set is determined based on the target power and the predetermined constraint is operated. The first power is set as a target power from a state equal to or lower than the first power corresponding to the lower limit within the sound region to the second power corresponding to the upper limit within the booming sound region, and the setting The power output apparatus according to claim 1, wherein the power output device is means for setting the second power as the target power until the target power to be reached reaches the first power from the state equal to or higher than the second power. The power output device according to claim 1 or 2,
Comprising required power setting means for setting required power to charge and discharge the power storage means,
The target power setting means is means for setting the target power based on the set required power and the set required power. A power output device that outputs power to a drive shaft,
An internal combustion engine;
An electric power drive input / output means connected to the output shaft of the internal combustion engine and the drive shaft, and outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric 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 power setting means for setting required power required for the drive shaft based on an operation by an operator;
Target power setting means for setting target power to be output from the internal combustion engine based on the set required power;
An operating point setting means for setting an operating point of the internal combustion engine based on the set target power, a predetermined constraint, and a request for noise during operation of the internal combustion engine;
The internal combustion engine, the electric power drive input / output means, and the electric motor are controlled so that the internal combustion engine is operated by the set operation point and power based on the set required power is output to the drive shaft. Control means;
A power output device comprising:   5. The power output apparatus according to claim 4, wherein the request for the noise is a request that the internal combustion engine is not operated within a booming noise region set as a region where a booming noise is generated when the internal combustion engine is operated.   6. The power output apparatus according to claim 1, wherein the predetermined constraint is a constraint for operating the internal combustion engine efficiently.   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.   The power drive input / output means includes a first rotor attached to the output shaft of the internal combustion engine and a second rotor attached to the drive shaft, and the first rotor and the second rotor. 7. A power output apparatus according to claim 1, wherein the power output apparatus is a counter-rotor motor that outputs at least a part of power from the internal combustion engine to the drive shaft with input / output of electric power by electromagnetic action with the rotor. .   An automobile comprising the power output device according to claim 1 and having an axle connected to the drive shaft. An internal combustion engine, and an electric power input / output means connected to the output shaft and the drive shaft of the internal combustion engine for outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric power; A control method of a power output device comprising: an electric motor capable of inputting / outputting power to / from a drive shaft; and an electric power power input / output means and a power storage means capable of exchanging electric power with the electric motor, and outputting power to the drive shaft. There,
(A) setting required power required for the drive shaft based on the operation of the operator;
(B) When setting the target power based on the set required power, when the operating point at which the target power to be set is determined based on the target power and a predetermined constraint operates the internal combustion engine In the case of power that is outside the region where the noise is generated, a power based on the set required power is set as a target power, and the target power to be set is the target power and the predetermined power. When the driving point determined based on the constraints is the power that falls within the booming sound area, the power that is within the booming sound area boundary is set as the target power based on the progress of setting the target power,
(C) setting an operating point of the internal combustion engine that outputs the set target power based on the predetermined constraint;
(D) controlling the internal combustion engine, the power power input / output means, and the electric motor so that the internal combustion engine is operated at the set operating point and power based on the required power is output to the drive shaft. Control method of power output device. An internal combustion engine, and an electric power input / output means connected to the output shaft and the drive shaft of the internal combustion engine for outputting at least a part of the power from the internal combustion engine to the drive shaft with input / output of electric power; A control method of a power output device comprising: an electric motor capable of inputting / outputting power to / from a drive shaft; and an electric power power input / output means and a power storage means capable of exchanging electric power with the electric motor, and outputting power to the drive shaft. There,
(A) setting required power required for the drive shaft based on the operation of the operator;
(B) setting a target power to be output from the internal combustion engine based on the set required power;
(C) setting an operating point of the internal combustion engine based on the set target power, predetermined constraints, and a request for noise during operation of the internal combustion engine;
(D) The internal combustion engine is operated at the set operating point and the internal combustion engine, the power power input / output means, and the electric motor are controlled so that power based on the required power is output to the drive shaft. Output device control method.

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