CN116409301A

CN116409301A - Power output device

Info

Publication number: CN116409301A
Application number: CN202210010215.6A
Authority: CN
Inventors: 稲叶威知郎; 田中正志; 屋代一树
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2023-07-11

Abstract

The invention provides a power output apparatus capable of suppressing deterioration of response performance caused by a filter and suppressing influence of the filter on misfire detection. The power output apparatus includes: an internal combustion engine; a rotating electrical machine connected to an output shaft of the internal combustion engine; and a control device that controls the rotating electrical machine; the control device includes a filter processor that is within a resonance frequency band and that attenuates torque of the rotating electrical machine, and when a rate of change of requested output torque of requested output is equal to or greater than a predetermined value, or when the internal combustion engine misfire is detected, the control device performs control that decreases a gain of the filter processor, or turns off the filter processor, or selects and turns on another filter processor, the other filter processor and the filter processor having different attenuation frequency bands.

Description

Power output device

Technical Field

The present invention relates to a power output apparatus, and more particularly to a power output apparatus for a vehicle.

Background

In recent years, construction safety cities and human living areas have been enhanced in all countries to enhance the inclusive and sustainable urban construction, sustainable human living area planning and management capabilities of all countries. There is therefore a need in all countries to enhance the provision of safe, affordable, easy to use, sustainable transportation systems to all people, to improve road safety, in particular to expand public transportation, to reduce the negative environmental impact of people in cities, including particular concerns about air quality, and urban waste management, etc. In the field of transportation, in the manufacturing industry of vehicles, measures are urgently needed to cope with environmental problems to develop a technology capable of increasing the improvement rate of global energy efficiency.

In the related art vehicle manufacturing industry, there is a control device for a double-power type mobile body (for example, a hybrid vehicle) capable of performing a cylinder deactivation operation. In general, a parallel hybrid vehicle is controlled in various ways, for example, a driving output of an engine of the hybrid vehicle is assisted by an electric motor at the time of acceleration, and at the time of deceleration, a battery is charged by deceleration recovery, so that a charged state of the battery can be maintained and still meet a driver's demand. Furthermore, since the engine and the motor are connected in series from a structural point of view, the construction of the vehicle becomes simple and the weight of the entire system remains low. Thus, a high degree of freedom can be obtained in the loading device.

For example, there are a control device for a hybrid vehicle and a technique for the hybrid vehicle that perform control for suppressing the influence of a rotational speed variation of an engine (i.e., an internal combustion engine). For example, there is a control technique for suppressing a rotation speed variation in a burst cycle from an internal combustion engine in the related art: when the rotational speed variation of the internal combustion engine is suppressed by using the torque output from the motor, the target rotational speed is corrected based on the rotational speed variation due to the torque applied to the motor (i.e., the torque for suppressing the rotational speed variation of the internal combustion engine), and feedback control is performed.

In the related art, there are an ECU for controlling the rotation speed of an internal combustion engine and an ECU for controlling the rotation speed of an electric motor, which are separately provided to avoid enlargement of the ECU, and a control module for controlling the rotation speed of the internal combustion engine and a control module for controlling the rotation speed of the electric motor, which are separately provided even if hardware (hardware) itself is the same. In this case, since the ECU and the control module are independent of each other, there is a possibility that deviation of the target rotation speed, response delay, and the like occur, and the torque of the internal combustion engine and the torque of the electric motor collide with each other (control interference) and proper control cannot be performed. Specifically, there are problems such as hunting (hunting) of control, excessive increase or decrease of torque of the internal combustion engine, and erroneous learning in learning control.

Further, patent document 1 proposes a control technique of suppressing vibration that may occur to the vehicle at the time of starting the internal combustion engine, in a control system provided in the hybrid vehicle that is proposed in patent document 1, when the control system controls the internal combustion engine to execute a start instruction, a start torque to start the internal combustion engine is set to start the internal combustion engine, wherein the start torque to start the internal combustion engine is set to cancel resonance by filtering a set temporary motor torque using a resonance cancellation filter processing unit, and the temporary motor torque is set to a torque that is equal to or higher than a torque set to allow an ignition start rotational speed that can be executed. As described above, in patent document 1, the torque command of the motor is set by eliminating the frequency component of resonance caused by a damper (damper) connected between the engine and the motor by a filter, and the torque output to the drive shaft is canceled, thereby suppressing vibration that may occur in the vehicle at the time of starting the internal combustion engine.

Further, patent document 2 proposes a control technique for controlling a hybrid vehicle in which a damper device is disposed between an engine and an electric motor. In the control system provided in the hybrid vehicle proposed in patent document 2, the damper torque is estimated by the damper torque estimating portion, and a filter is also applied to acquire a damper torque target value for the estimated damper torque to acquire the damper torque target value in real time.

[ Prior Art literature ]

[ patent literature ]

[ patent document 1]: japanese patent laid-open No. 2009-013955

[ patent document 2]: japanese patent laid-open No. 2013-107440

Disclosure of Invention

[ problem to be solved by the invention ]

In the related art, by using a band elimination filter, resonance caused by response delay or the like of target rotation speeds of an internal combustion engine and an electric motor in a power transmission system is suppressed, so that appropriate control is performed. However, in the related art, since a frequency domain equivalent to a eigenvalue in order to avoid resonance occurring at the eigenvalue will be truncated, there is a possibility that a response may not be or a response may be poor in the eigenvalue region. In addition, in the prior art, there is no degree of freedom in the configuration of the filter, and the control system cannot deal with the case where there is a variation in the characteristic value or there are a plurality of characteristic values. In addition, resonance in the power transmission system is suppressed by the filter, so that misfire detection is affected by the filter, thereby affecting misfire determination. Thus, there is a need for a power output apparatus having a function of suppressing deterioration of response performance caused by a filter against abrupt torque demand changes and suppressing influence of the filter on misfire detection.

In view of the above, an object of the present invention is to provide a power output apparatus of a vehicle that can suppress resonance of a power transmission system caused by response delay or the like of target rotation speeds of an internal combustion engine and an electric motor, and can suppress influence of a filter on misfire detection. When the response value of the torque is steep due to the rapid acceleration or the rapid deceleration, by temporarily canceling the filter processing function of the filter or adjusting the filter to reduce the gain of the filter, it is possible to suppress deterioration of the response performance caused by the filter and to suppress the influence of the filter on the misfire detection, thereby improving the problems of resonance caused by the response delay of the target rotational speeds of the internal combustion engine and the motor and the influence of the filter on the misfire detection of the internal combustion engine in the power transmission system of the vehicle.

[ means of solving the problems ]

In order to achieve the object, the present invention is a power output apparatus comprising: an internal combustion engine; a rotating electrical machine connected to an output shaft of the internal combustion engine; and a control device that controls the rotating electrical machine; the control device includes a filter processor that is within a resonance frequency band and that attenuates torque of the rotating electrical machine, and when a rate of change of requested output torque of requested output is equal to or greater than a predetermined value, or when the internal combustion engine misfire is detected, the control device performs control that decreases a gain of the filter processor, or turns off the filter processor, or selects and turns on another filter processor, the other filter processor and the filter processor having different attenuation frequency bands.

According to the present invention, when the response value of the torque is steep due to a sudden acceleration or a sudden deceleration, the filter processing function of the filter is temporarily released or the filter is adjusted so that the gain of the filter is reduced, whereby deterioration of the response performance caused by the filter can be suppressed and the influence of the filter on the misfire detection performance can be suppressed.

Also, in the present invention, when the speed of change of the torque of the rotary electric machine is within the attenuation band of the filter processor, the control means performs control of decreasing the gain of the filter processor, or turning off the filter processor, or selecting and turning on the other filter processor having a different attenuation band.

Also, in the present invention, when the engine misfire is detected, and when the rotational speed of the engine is within a rotational speed range that has an influence on the misfire detection performance of the engine, the control means performs control to decrease the gain of the filter processor, or to turn off the filter processor, or to select and turn on the other filter processor having a different attenuation band.

In the present invention, the power output apparatus is mounted on a vehicle provided with an electric power storage device for supplying electric power to the rotating electrical machine, and the control device turns off the filter processor when a remaining capacity value of the electric power storage device is equal to or smaller than a predetermined electric power capacity value.

[ Effect of the invention ]

Based on the above, the power output apparatus of the invention can suppress resonance of the power transmission system caused by response delay of target rotation speeds of the internal combustion engine and the motor, and the like, and can suppress influence of the filter on misfire detection. When the response value of the torque is steep due to rapid acceleration or rapid deceleration, by temporarily canceling the filter processing function of the filter or adjusting the filter so that the gain of the filter is reduced, it is possible to suppress deterioration of the response performance caused by the filter and to suppress the influence of the filter on the misfire detection, thereby improving the problems of resonance caused by response delay of the target rotational speeds of the internal combustion engine and the motor and the influence of the filter on the misfire detection of the internal combustion engine in the power transmission system of the vehicle.

In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic diagram for explaining a structure of a power output apparatus according to an embodiment of the invention.

Fig. 2 is a schematic diagram showing a configuration of the rotating electrical machine rotation speed control unit of fig. 1.

Fig. 3 is a flowchart schematically showing a flow of operations of the rotating electrical machine rotation speed control unit of fig. 2.

[ description of symbols ]

100: power output device

102: internal combustion engine rotation speed control unit

103: fire detection section

104: rotating speed control unit for rotary electric machine

110: control device

112：ENG-ECU

114：MG-ECU

120. 120A: filtering processor

130: current instruction calculating unit

ENG: internal combustion engine

MG: rotary electric machine

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments described below, common parts are denoted by the same reference numerals, and overlapping description is omitted. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless specifically described. In the following embodiments, each constituent element is not necessarily essential to the present invention unless otherwise specified. In the following, when a plurality of embodiments are present, the characteristic portions of each embodiment can be appropriately combined, unless otherwise specified, from the beginning.

The power output apparatus according to the embodiment of the invention is applied to a hybrid vehicle (hybrid electric vehicle) that uses an internal combustion engine (internal combustion engine) (or other heat engine) and a rotating electrical machine (or motor) as drive sources, and the hybrid vehicle is provided with an electric power storage device (battery pack) for supplying electric power to the rotating electrical machine. The hybrid vehicle is driven using electric power discharged from a battery such as a secondary battery, a hydrogen fuel cell, a metal fuel cell, or an ethanol fuel cell, for example. In the case of a rotating electrical machine, the rotating electrical machine is operated using generated power generated by an engine connected to an internal combustion engine or discharge power of a power storage device such as a secondary battery or a fuel cell. In the present embodiment, a four-wheel vehicle is taken as an example, and the power output apparatus of the present invention is applied to a hybrid vehicle equipped with an internal combustion engine and a rotating electrical machine, which are driven in association with each other in different manners, as an example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, a power output apparatus of the present embodiment will be described with reference to the drawings. Fig. 1 is a schematic diagram for explaining a structure of a power output apparatus according to an embodiment of the invention.

As shown in fig. 1, the power output apparatus 100 of the present embodiment is suitable for being mounted on a hybrid vehicle, and the power output apparatus 100 is configured to control operations of an internal combustion engine ENG and a rotating electrical machine MG mounted on the hybrid vehicle, the rotating electrical machine MG being connected to an output shaft of the internal combustion engine ENG. The internal combustion engine ENG is also referred to as an "engine", and is a gasoline engine that functions as a main power source of the hybrid vehicle. The rotating electrical machine MG is a specific example of a "motor", and is a motor generator having a power running function of converting electric energy into kinetic energy and a regeneration function of converting kinetic energy into electric energy. Although fig. 1 shows the internal combustion engine ENG and the rotary electric machine MG as being directly connected, the internal combustion engine ENG and the rotary electric machine MG may be connected via a planetary gear mechanism or the like, as long as the internal combustion engine ENG and the rotary electric machine MG can transmit torque to each other.

The power output apparatus 100 of the present embodiment includes a control device 110, and the control device 110 includes an electronic control unit (Electronic Control Unit (ECU)) 112 (i.e., ENG-ECU) 112 that controls the operation of the internal combustion engine ENG, and an electronic control unit (i.e., MG-ECU) 114 that controls the operation of the rotating electrical machine MG. In the present embodiment, the ENG-ECU 112 and the MG-ECU 114 are configured as independent ECUs. In other embodiments, the ENG-ECU 112 and the MG-ECU 114 may be configured as one ECU (i.e., a common ECU), and the present invention is not limited to this. Thus, the power output apparatus 100 of the present embodiment includes an ENG-ECU 112 that controls the internal combustion engine ENG and an MG-ECU 114 that controls the rotating electrical machine MG, respectively. In other embodiments, the ENG-ECU 112 for controlling the internal combustion engine ENG and the MG-ECU 114 for controlling the rotating electrical machine MG may be configured as different control modules (control modules) in the same ECU.

The ENG-ECU 112 that controls the engine ENG includes an engine rotation speed control unit 102 that outputs a torque command for bringing the engine rotation speed close to the target engine rotation speed based on the acquired rotation speed (ENG rotation speed) of the engine ENG. The engine speed control unit 102 brings the engine speed close to the target speed by, for example, electronic fuel injection (Electronic Fuel Injection (EFI)) control. The MG-ECU 114 that controls the rotating electrical machine MG includes a rotating electrical machine rotation speed control unit 104 that outputs a current or torque command for bringing the MG rotation speed close to the target MG rotation speed based on the acquired rotation speed (MG rotation speed) of the rotating electrical machine MG. The rotating electrical machine rotation speed control unit 104 can cause the rotating electrical machine MG to output torque (hereinafter referred to as "vibration suppression torque") for suppressing the influence of the rotation speed variation of the internal combustion engine ENG, in addition to torque as the power of the hybrid vehicle. The vibration control torque is, for example, a torque having a phase opposite to a rotational speed fluctuation component of the internal combustion engine ENG, and has an effect of suppressing the generation of vibrations of the hybrid vehicle (for example, vibrations corresponding to the resonance frequency of the drive system) caused by the rotational speed fluctuation of the internal combustion engine ENG.

Fig. 2 is a schematic diagram showing a configuration of the rotating electrical machine rotation speed control unit of fig. 1. Referring to fig. 1 and 2, the rotating electrical machine rotation speed control unit 104 of the present embodiment includes a filter processor 120 and a current command calculating unit 130 as processing modules or hardware implemented therein. The filter processor 120 acquires an MG rotation speed signal indicating a temporal variation of the MG rotation speed, and performs a predetermined filter process on the acquired MG rotation speed signal. The filter processor 120 is configured to output the MG rotation speed signal after the filter processing to the current command calculation unit 130. The current command calculation unit 130 outputs a current command signal indicating the torque to be output by the rotating electrical machine MG based on the MG torque signal after the filtering process.

In the present embodiment, the filter processor 120 is a filter that is located in the resonance frequency band (resonant frequency band) and that attenuates the torque of the rotating electrical machine MG, for example. In the power output apparatus 100, in addition to the filter processor 120 adapted to be within the frequency band range of the resonance frequency band, a filter processor adapted to be outside the frequency band range of the resonance frequency band may be provided, that is, another filter processor 120A (i.e., the filter processor 120A in fig. 2) may be provided, wherein the filter processor 120A has a different attenuation frequency band (attenuation frequency band) from the filter processor 120.

The control device 110 further includes a misfire detection unit 103, and the misfire detection unit 103 performs a misfire determination of the internal combustion engine based on a rotational variation of the ENG rotation speed signal during the operation of the internal combustion engine ENG.

More specific operation contents of the filter processor 120 and the current command calculation unit 130 are described in detail below.

In the present embodiment, for example, a band-stop filter (BSF) is used as the filter processor 120 and the filter processor 120A, wherein the band-stop filter is generally used for suppressing resonance caused by response delay of target rotation speeds of the internal combustion engine and the rotating electrical machine in the power transmission system of the vehicle, and suitable control can be performed. However, in general, when a band-stop filter is used, since a frequency domain equivalent to a characteristic value in order to avoid resonance occurring at the characteristic value (for example, when it is within a resonance frequency band) will be cut off, there is a possibility that a response or a poor response may not be possible in the characteristic value region. In addition, the band elimination filter in the general control system has no degree of freedom in configuration, and the general control system cannot deal with the case where there is a change in the characteristic value or there are a plurality of characteristic values. In addition, when resonance in the power transmission system is suppressed using the band elimination filter, misfire detection of the internal combustion engine is affected, and thus misfire determination of the internal combustion engine is affected. In contrast, in the present embodiment, the rotating electrical machine rotation speed control unit 104 of the control device 110 controls the filter processor 120 and the filter processor 120A as follows.

In the present embodiment, in order to suppress deterioration of response performance caused by the filter and suppress influence of the filter on misfire detection, the control device 110 of the power output apparatus 100 executes control as follows. When the speed of change of the requested output torque of the requested output is equal to or greater than a predetermined value, or when an internal combustion engine misfire is detected, the control device performs control of decreasing the gain of the filter processor 120, or turning off the filter processor 120, or selecting and turning on another filter processor 120A having a different attenuation band from the filter processor 120. In this way, when the response value of the torque is steep due to rapid acceleration or rapid deceleration, for example, when the ENG rotation speed exceeds a predetermined value or when the change speed of the MG rotation speed (i.e., MG torque) exceeds a predetermined value, the power output apparatus 100 temporarily releases the filter processing function by reducing the gain of the filter processor 120 or by directly turning off the filter processor 120 or selectively turning on the other filter processor 120A, and can suppress the deterioration of the response performance caused by the filter and the influence of the filter on the misfire detectability, thereby improving the problem of resonance caused by the response delay or the like of the target rotation speeds of the internal combustion engine and the motor and the influence of the filter on the misfire detectability of the internal combustion engine in the power transmission system of the vehicle.

Fig. 3 is a flowchart schematically showing a flow of operations of the rotating electrical machine rotation speed control unit of fig. 2. As shown in fig. 1 to 3, when the power output apparatus 100 is in the operating state, the rotating electrical machine rotation speed control unit 104 starts the following control flow. First, the misfire detection section 103 performs a misfire determination of the internal combustion engine ENG based on the rotation fluctuation of the ENG rotation speed signal, that is, the misfire detection section 103 performs a determination as to whether or not the internal combustion engine misfire is detected (step S1), and when the misfire detection section 103 does not detect the misfire of the internal combustion engine ENG (step S1: no in the figure), the routine proceeds to step S2. In step S2, the rotating electrical machine rotation speed control unit 104 determines whether or not the change speed of the requested output torque is equal to or greater than a predetermined value, which may be a threshold value of the change speed of the torque set in advance in the power transmission system, and when the change speed of the requested output torque is not equal to or greater than (that is, does not exceed) the predetermined value (step S2: no in the drawing), the process ends. Therefore, when the misfire detection step of step S1 does not detect the internal combustion engine misfire, and when the speed of change in the requested output torque of the requested output of step S2 does not exceed the predetermined value, it is determined that the power output apparatus 100 is in the normal operation state, the subsequent processing is not executed and the processing ends. When the ENG rotation speed of the internal combustion engine varies due to a factor, vibration corresponding to the resonance frequency of the drive system is caused, for example, when the speed of change of the requested output torque of the requested output is changed, the filter processor 120 of the rotating electric machine rotation speed control unit 104 performs the filter process, that is, the power output system is in the execution range (BSF execution range) where the band elimination filter functions. Therefore, as shown in fig. 3, when the misfire detection step of step S1 does not detect the internal combustion engine misfire, and when the determination result of whether or not step S2 is within the BSF execution range is no, the process ends.

As shown in fig. 3, when the misfire detection section 103 detects a misfire of the internal combustion engine ENG (yes in step S1 in the figure), the process proceeds to step S3. In step S3, the ENG rotation speed of the internal combustion engine is detected, it is determined whether the ENG rotation speed of the internal combustion engine exceeds a predetermined threshold value, that is, it is determined whether the ENG rotation speed of the internal combustion engine is equal to or higher than a predetermined ENG rotation speed, and when the ENG rotation speed of the internal combustion engine is not equal to or higher than the predetermined ENG rotation speed (step S3: NO in the figure), the routine proceeds to step S2. In step S3, when the ENG rotation speed of the internal combustion engine is equal to or higher than a predetermined ENG rotation speed (step S3: yes in the figure), the routine proceeds to step S4. In step S3, when an engine misfire is detected, the ENG rotation speed of the engine may be within a specific rotation speed range that can affect the misfire detection performance. Therefore, when it is determined in step S1 that there is a detected engine misfire, step S4 is performed when it is determined in step S3 that the ENG rotation speed of the internal combustion engine is equal to or greater than the predetermined ENG rotation speed.

In step S4, the rotating electrical machine rotation speed control portion 104 performs control to decrease the gain of the filter processor 120, or to turn off the filter processor 120, or to select and turn on another filter processor 120A. Next, the flow advances to step S5, and in step S5, the adjusted filtering process is executed.

In step S2, when the speed of change of the requested output torque is equal to or greater than a predetermined value (step S2: yes in the figure), the flow proceeds to step S6. In step S6, it is determined whether or not the value of the rate of change of the accelerator opening exceeds a predetermined threshold value, that is, whether or not the value of the rate of change of the accelerator opening is equal to or greater than the value of the rate of change of the predetermined accelerator opening, and when the value of the rate of change of the accelerator opening is equal to or greater than the value of the rate of change of the predetermined accelerator opening (step S6: yes in the drawing), the routine proceeds to step S7. In step S7, it is determined whether the torque change speed of the rotating electrical machine MG is within the band range of the attenuation band of the filter processor, and when the torque change speed of the rotating electrical machine is within the band range of the attenuation band of the filter processor (step S7: yes in the drawing), the process proceeds to step S4, and the process described in step S4 is executed. In step S6, when the value of the change rate of the accelerator opening is not equal to or greater than the value of the change rate of the predetermined accelerator opening (step S6: NO in the figure), the routine proceeds to step S8. In step S8, the filter processor 120 performs adjustment of the gain of the corresponding filter processing, and performs the adjusted filter processing. Further, in step S7, when the torque change speed of the rotary electric machine is outside the band range of the attenuation band of the filter processor (step S7: NO in the drawing), the process proceeds to step S8, and the process described in step S8 is executed. Further, by performing the determination of step S6 as to whether the value of the change rate of the accelerator opening exceeds the predetermined value and the determination of step S7 as to whether the torque change speed of the rotating electrical machine is within the frequency band range of the attenuation frequency band, the determination of the response of the power output apparatus 100 can be accelerated.

In addition, the vehicle is mounted with an electric power storage device, such as a battery pack, for supplying electric power to the rotating electrical machine. In the power output apparatus 100 of the present embodiment, when the remaining capacity value of the power storage device of the rotating electrical machine MG is equal to or smaller than the predetermined power capacity value, the rotating electrical machine rotation speed control portion 104 turns off the filter processor.

By the control described above, even if the hardware or the parameter that affects the eigenvalue is changed, the resonance phenomenon generated at the eigenvalue can be effectively suppressed. In addition, other functions can be prevented from being affected. In other words, by the control described above, the influence of the misfire detection can be avoided, and the influence of the torque response of the vehicle at the time of rapid acceleration and deceleration can also be avoided. In this way, the power output apparatus can suppress not only resonance of the power transmission system caused by response delay or the like of target rotation speeds of the internal combustion engine and the electric motor, but also influence of the filter on misfire detection.

Since the angular velocity of a crank shaft (crank shift) of the misfire detection calculation parameter is affected when the filtering process is performed in order to cope with resonance caused by response delay of target rotational speeds of the internal combustion engine and the motor, etc., the influence of the misfire detection can be avoided by turning on/off the filtering processor, or using a different filtering processor instead, or adjusting the gain of the filtering processor in performing the misfire detection.

Further, when the response value of the torque is steep due to rapid acceleration or rapid deceleration, that is, when the power output apparatus is suddenly requested to output a considerable requested output torque, and when the torque change time is within the frequency band range of the attenuation frequency band in the filtering process, the control responsiveness is deteriorated, which may lead to deterioration of the commodity property. Therefore, the power output apparatus of the invention can avoid the influence caused by the torque request by turning on/off the filter processor, or alternatively using a different filter processor, or adjusting the gain of the filter processor in the above-described case.

In view of the above, the power output apparatus of the invention can suppress resonance of the power transmission system caused by response delay of target rotation speeds of the internal combustion engine and the motor, and the like, and can suppress influence of the filter on misfire detection. When the response value of the torque is steep due to rapid acceleration or rapid deceleration, by temporarily canceling the filter processing function of the filter or adjusting the filter so that the gain of the filter is reduced, it is possible to suppress deterioration of the response performance caused by the filter and to suppress the influence of the filter on the misfire detection, thereby improving the problems of resonance caused by response delay of the target rotational speeds of the internal combustion engine and the motor and the influence of the filter on the misfire detection of the internal combustion engine in the power transmission system of the vehicle.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power output apparatus, characterized by comprising:

an internal combustion engine;

a rotating electrical machine connected to an output shaft of the internal combustion engine; and

a control device that controls the rotating electrical machine;

the control device includes a filter processor within a resonance frequency band for attenuating torque of the rotating electrical machine, an

When the speed of change of the requested output torque of the requested output is equal to or greater than a predetermined value, or when the internal combustion engine misfire is detected, the control device performs control of decreasing the gain of the filter processor, or turning off the filter processor, or selecting and turning on another filter processor, the other filter processor and the filter processor having different attenuation bands.

2. The power output apparatus in accordance with claim 1, wherein,

when the speed of change of the torque of the rotating electrical machine is within the attenuation band of the filter processor, the control means performs control of decreasing the gain of the filter processor, or turning off the filter processor, or selecting and turning on the other filter processor having a different attenuation band.

3. The power output apparatus in accordance with claim 1, wherein,

when the engine misfire is detected, and when the rotational speed of the engine is within a rotational speed range that has an influence on the misfire detection performance of the engine, the control means performs control to decrease the gain of the filter processor, or to turn off the filter processor, or to select and turn on the other filter processor having a different attenuation band.

4. A power output apparatus as claimed in any one of claims 1 to 3, wherein,

the power output apparatus is mounted on a vehicle provided with an electric power storage device for supplying electric power to the rotating electrical machine, and the control device turns off the filter processor when a remaining capacity value of the electric power storage device is equal to or smaller than a predetermined electric power capacity value.