JP2015085863A - Hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more properly deal with occurrence of abnormal noise in a mechanical mechanism such as a planetary gear.SOLUTION: When tapping noise is detected when engine speed Ne is within a resonance band, basically the engine speed Ne is changed to either one, closer to the speed Ne, of a lower limit speed Nf1 and an upper limit speed Nf2 of the resonance band to lie outside of the resonance band (for example, point A→B). When it is predicted that power storage ratio SOC of a battery cannot be maintained within an acceptable range for predetermined time if the engine speed Ne is changed to the either one, closer to the speed Ne, of the lower limit speed Nf1 and the upper limit speed Nf2, the engine speed Ne is changed to either one, farther from the speed Ne, of the lower limit speed Nf1 and the upper limit speed Nf2 to lie outside of the resonance band (for example point A→D).

Description

  The present invention relates to a hybrid vehicle. More specifically, the present invention relates to an engine, a first motor, a driving shaft coupled to an axle, an output shaft of the engine, and a planetary gear having three rotating elements connected to a rotating shaft of the first motor. The present invention relates to a hybrid vehicle including a second motor having a rotating shaft connected to a drive shaft, and a battery that exchanges electric power with the first motor and the second motor.

  Conventionally, in this type of hybrid vehicle, an engine, a first motor generator, an output sprocket coupled to drive wheels, an output shaft of the engine, and a rotation shaft of the first motor are connected to a ring gear, a sun gear, and a carrier. A power split mechanism (gear device), a second motor generator having a rotary shaft connected to the output sprocket, and a battery that exchanges power with the first motor generator and the second motor generator. A discharge side correction for reducing the engine output while controlling the second motor generator to the power running side, and a charge side correction for increasing the engine output while controlling the second motor generator to the regeneration side when a rattling noise is generated. Have been proposed (for example, to correct the higher engine efficiency) (for example, Patent reference 1). In this hybrid vehicle, such control can reduce the occurrence of gear rattling noise without deteriorating fuel consumption.

JP 2008-163297 A

  In the hybrid vehicle described above, after changing the engine speed to reduce the rattling noise, the engine speed (output) is changed again in a short time to protect the battery. There may be cases where it must be done. This is not preferable because it may lead to deterioration of the ride comfort of the driver.

  The main purpose of the hybrid vehicle of the present invention is to more appropriately cope with abnormal noise generated by a mechanical mechanism such as a planetary gear.

  The hybrid vehicle of the present invention employs the following means in order to achieve the main object described above.

The hybrid vehicle of the present invention
An engine, a first motor, a drive shaft connected to an axle, a planetary gear in which three rotation elements are connected to an output shaft of the engine and a rotation shaft of the first motor, and a rotation shaft connected to the drive shaft A hybrid vehicle comprising: the second motor, and a battery that exchanges electric power with the first motor and the second motor,
When a predetermined abnormal noise is generated in the mechanical mechanism including the planetary gear accompanying the operation of the engine within the resonance band, the engine rotation speed is set to the maximum rotation speed of the resonance band. Control means for executing a first control to change the minimum rotation speed closer to the outside of the resonance band,
When it is predicted that the storage ratio of the battery cannot be maintained within an allowable range for a predetermined time when the first control is performed when the predetermined abnormal noise occurs, the control means sets the engine speed to the maximum of the resonance band. A means for executing a second control for changing the rotational speed and the minimum rotational speed to the far side to make it out of the resonance band;
It is characterized by that.

  In the hybrid vehicle according to the present invention, when a predetermined abnormal noise is generated in the mechanical mechanism including the planetary gear that accompanies the operation of the engine within the resonance band, basically the engine speed The first control is performed to change the value to the closer side between the maximum rotation speed and the minimum rotation speed of the resonance band to make it outside the resonance band. When the engine speed is in the resonance band, tapping noise is likely to be generated by the mechanical mechanism when the engine torque fluctuation increases, but this control reduces tapping noise due to a relatively small change in the engine speed. Can be reduced. On the other hand, when it is predicted that the battery storage ratio cannot be maintained within the allowable range for a predetermined time when the first control is performed when the predetermined abnormal noise occurs, the engine speed is set between the maximum speed and the minimum speed of the resonance band. The second control is executed by changing the distance to the far side and out of the resonance band. Thereby, tapping noise can be reduced. Further, when the battery storage ratio is out of the allowable range, it is necessary to change the engine speed (power) again so that the battery is within the allowable range. By executing the second control, the rotational speed of the engine reenters the resonance band (passes through the rotational speed at which the resonance level is maximized) in a short time (within a predetermined time), or the rotational speed of the engine is increased. It is possible to suppress the occurrence of inconvenience (for example, deterioration in riding comfort, increase in tapping noise, etc.) due to changes. As a result, it is possible to more appropriately cope with abnormal noise generated by a mechanical mechanism such as a planetary gear.

1 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 20 as an embodiment of the present invention. It is explanatory drawing which shows a mode that the reset temporary rotation number Netmp and the reset temporary torque Tentmp are set.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 as an embodiment of the present invention. As shown in the drawing, the hybrid vehicle 20 of the embodiment includes an engine 22 that outputs power using gasoline or light oil as a fuel, an engine electronic control unit (hereinafter referred to as an engine ECU) 24 that controls the drive of the engine 22, an engine, and the like. A planetary gear 30 in which a carrier is connected to the crankshaft 26 of 22 via a damper 28 and a ring gear is connected to a drive shaft 36 connected to drive wheels 38a and 38b via a differential gear 37; for example, as a synchronous generator motor A motor MG1 having a rotor connected to the sun gear of the planetary gear 30, a motor MG2 having a rotor connected to the drive shaft 36, and an inverter for driving the motors MG1 and MG2, for example. 41 and 42, and inverters 41 and 42 A motor electronic control unit (hereinafter referred to as a motor ECU) 40 for driving and controlling the motors MG1 and MG2 by switching control of the switching elements that are not operated, and a motor configured as a lithium ion secondary battery, for example, via inverters 41 and 42 A battery 50 that exchanges power with MG1 and MG2, a battery electronic control unit (hereinafter referred to as a battery ECU) 52 that manages the battery 50, and a hybrid electronic control unit (hereinafter referred to as an HVECU) 70 that controls the entire vehicle. .

  Although not shown, the engine ECU 24 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . The engine ECU 24 receives signals from various sensors necessary for controlling the operation of the engine 22 via an input port, and the engine ECU 24 outputs various control signals for controlling the operation of the engine 22. It is output through the port. The engine ECU 24 calculates the rotational speed Ne of the engine 22 based on a signal from a crank position sensor (not shown) attached to the crankshaft 26 of the engine 22.

  Although not shown, the motor ECU 40 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . Signals from various sensors necessary to drive and control the motors MG1 and MG2 are input to the motor ECU 40 via an input port. The motor ECU 40 switches the inverters 41 and 42 to switching elements (not shown). A control signal or the like is output via the output port. The motor ECU 40 determines the rotational speeds Nm1, Nm2 of the motors MG1, MG2 based on the rotational positions θm1, θm2 of the rotors of the motors MG1, MG2 from the rotational position detection sensor that detects the rotational positions of the rotors of the motors MG1, MG2. Arithmetic.

  Although not shown, the battery ECU 52 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . Signals from various sensors necessary for managing the battery 50 are input to the battery ECU 52 via the input port. The battery ECU 52 manages the battery 50 based on the integrated value of the charge / discharge current Ib of the battery 50 detected by a current sensor (not shown), and the ratio of the capacity of power that can be discharged from the battery 50 at that time to the total capacity And calculating input / output limits Win and Wout which are allowable input / output powers that may charge / discharge the battery 50 based on the calculated storage ratio SOC and the battery temperature Tb. Yes.

  Although not shown, the HVECU 70 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. The HVECU 70 includes an ignition signal from the ignition switch 80, a shift position SP from the shift position sensor 82 that detects the operation position of the shift lever 81, and an accelerator opening from the accelerator pedal position sensor 84 that detects the amount of depression of the accelerator pedal 83. Acc, the brake pedal position BP from the brake pedal position sensor 86 that detects the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 88, and the like are input via the input port. The HVECU 70 is communicably connected to the engine ECU 24, the motor ECU 40, and the battery ECU 52, and exchanges various control signals and data with the engine ECU 24, the motor ECU 40, and the battery ECU 52.

  In the hybrid vehicle 20 of the embodiment configured as described above, a hybrid travel mode (HV travel mode) that travels with the operation of the engine 22 or an electric travel mode (EV travel mode) that travels while the operation of the engine 22 is stopped. Run.

  During travel in the HV travel mode, the HVECU 70 sets the required torque Tr * required for travel based on the accelerator opening Acc and the vehicle speed V, and sets the rotational speed Nr ( For example, the traveling power Pdrv * required for traveling is calculated by multiplying the rotational speed Nm2 of the motor MG2 and the rotational speed obtained by multiplying the vehicle speed V by a conversion factor), and the battery 50 is calculated from the calculated traveling power Pdrv *. The required power Pe * required for the vehicle is set by subtracting the charge / discharge required power Pb * (a positive value when discharging from the battery 50) based on the storage ratio SOC. Then, the target rotational speed Ne * and the target torque Te * of the engine 22 are set using the required power Pe *. Here, the target rotational speed Ne * and the target torque Te * of the engine 22 include an operation line (for example, an optimum fuel efficiency operation line) of the engine 22 that can output the required power Pe * from the engine 22 and a required power. It was determined as the intersection of Pe *. Next, the torque command Tm1 * of the motor MG1 is set by the rotational speed feedback control so that the rotational speed Ne of the engine 22 becomes the target rotational speed Ne * within the range of the input / output limits Win and Wout of the battery 50. At the same time, the torque command Tm2 * of the motor MG2 is set so that the required torque Tr * is output to the drive shaft 36. Then, the set target rotational speed Ne * and target torque Te * of the engine 22 are transmitted to the engine ECU 24, and torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are transmitted to the motor ECU 40. The engine ECU 24 that has received the target rotational speed Ne * and the target torque Te *, controls the intake air amount, fuel injection control, and ignition of the engine 22 so that the engine 22 is operated by the target rotational speed Ne * and the target torque Te *. The motor ECU 40 that performs control or the like and receives the torque commands Tm1 * and Tm2 * performs switching control of the switching elements of the inverters 41 and 42 so that the motors MG1 and MG2 are driven by the torque commands Tm1 * and Tm2 *. During traveling in the HV traveling mode, when the stop condition of the engine 22 is satisfied, for example, when the required power Pe * is less than the stop threshold value Pstop, the operation of the engine 22 is stopped and the traveling in the EV traveling mode is performed. Transition.

  During travel in the EV travel mode, the HVECU 70 sets a required torque Tr * based on the accelerator opening Acc and the vehicle speed V, sets a value 0 to the torque command Tm1 * of the motor MG1, and limits input / output of the battery 50. A torque command Tm2 * of the motor MG2 is set and transmitted to the motor ECU 40 so that the required torque Tr * is output to the drive shaft 36 within the range of Win and Wout. Then, the motor ECU 40 that receives the torque commands Tm1 * and Tm2 * performs switching control of the switching elements of the inverters 41 and 42 so that the motors MG1 and MG2 are driven by the torque commands Tm1 * and Tm2 *. When traveling in the EV traveling mode, the engine 22 is turned on when the engine 22 starting condition is satisfied, for example, when the required power Pe * calculated in the same manner as in the traveling in the HV traveling mode reaches a starting threshold value Pstart or more. Start and shift to traveling in the HV traveling mode.

  Next, the operation of the hybrid vehicle 20 of the embodiment configured as described above, in particular, the continuous gear teeth of the planetary gear 30 when the rotational speed Ne of the engine 22 is within the resonance band (the rotational speed range in which vehicle resonance occurs) when traveling in the HV mode. An operation when a tap sound (tapping noise) is detected will be described. In the embodiment, it is determined that tapping noise has occurred (occurred) when the torque fluctuation of the engine 22 is larger than the predetermined fluctuation or when the twist angle of the damper 28 is larger than the predetermined angle.

  When tapping noise is detected, the reset temporary rotation speed Netmp of the engine 22 is set using the rotation speed Ne of the engine 22, the lower limit rotation speed Nf1 and the upper limit rotation speed Nf2 of the resonance band, and the target after the resetting A temporary reset torque Ttmp for the engine 22 is set as an intersection between the rotational speed Ne * and the operation line of the engine 22 described above. Here, the temporary rotation speed Netmp for resetting the engine 22 determines whether the rotation speed Ne of the engine 22 is closer to the lower limit rotation speed Nf1 or the upper limit rotation speed Nf2, and the rotation speed Ne of the engine 22 is lower limit. When it is close to the rotational speed Nf1, a rotational speed slightly smaller than the lower limit rotational speed Nf1 (by the margin α) is set. When the rotational speed Ne of the engine 22 is close to the upper rotational speed Nf2, it is slightly smaller than the upper limit rotational speed Nf2 (by the margin α). ) A large rotation speed was set. In addition, the operation point including the reset temporary rotation number Netmp and the reset temporary torque Ttmp set in this way is an operation point on the operation line. FIG. 2 shows how the reset temporary rotation number Netmp and the reset temporary torque Tentmp are set. In the figure, the solid line shows an example of the operation line of the engine 22, and the broken line shows a curve where the required power Pe * is constant (equal power line of the required power Pe *). As shown in the figure, when the rotational speed Ne of the engine 22 is the rotational speed of the point A, since the speed is close to the upper limit rotational speed Nf2 out of the lower limit rotational speed Nf1 and the upper limit rotational speed Nf2, the point of the rotational speed larger than the upper limit rotational speed Nf2 Let B be the temporary resetting speed Nettmp and the temporary resetting torque Ttmp. Further, when the rotational speed Ne of the engine 22 is the rotational speed of the point C, since the lower rotational speed Nf1 of the lower limit rotational speed Nf1 and the upper rotational speed Nf2 is close to the lower rotational speed Nf1, the point D having a rotational speed smaller than the lower rotational speed Nf1 is regenerated. The setting temporary rotational speed Netmp and the resetting temporary torque Tentmp are used.

  When the temporary resetting speed Nettmp and the resetting temporary torque Tempmp of the engine 22 are set in this way, the required torque Tr * is within the range of the input / output limits Win and Wout of the battery 50 while the engine 22 is operated at the operating point. When temporary avoidance control for controlling the engine 22 and the motors MG1 and MG2 is executed so that (traveling power Pdrv *) is output to the drive shaft 36, the storage ratio SOC of the battery 50 is within an allowable range (lower limit ratio S1 ( For example, it is predicted (determined) whether a predetermined time (for example, 10 seconds or 12 seconds) can be maintained within a range from 35% or 40% to an upper limit ratio S2 (for example, 70% or 75%). )

  When executing the temporary avoidance control, the reset temporary rotation speed Netmp of the engine 22 is smaller than the rotation speed Ne (target rotation speed Ne *), as compared to when no tapping noise is detected. Since the power decreases and the output from the motor MG2 increases in order to output the required torque Tr * (travel power Pdrv *) to the drive shaft 36, the input / output power of the battery 50 increases toward the output (discharge) side. The storage rate SOC decreases. For this reason, when the storage ratio SOC falls below the lower limit ratio S1 of the allowable range after the execution of the temporary avoidance control is started, the power of the engine 22 is increased to charge the battery 50 (the rotation speed Ne of the engine 22 is reduced to the lower limit). The engine speed Ne needs to be increased from a rotational speed smaller than the number Nf1 to a rotational speed larger than the upper limit rotational speed Nf2, and the rotational speed Ne of the engine 22 enters the resonance band again (passes through the rotational speed at which the resonance level is maximized). There is a possibility that inconvenience (for example, deterioration in riding comfort and increase in tapping noise) may occur due to a large change in the rotational speed Ne of the engine 22.

  On the other hand, when the reset temporary rotation speed Netmp of the engine 22 is larger than the rotation speed Ne, the power of the engine 22 becomes larger than when no tapping noise is detected, and the required torque Tr * (travel power Pdrv) is increased. Since the output from the motor MG2 is reduced in order to output *) to the drive shaft 36, the input / output power of the battery 50 is increased to the input (charge) side, and the storage rate SOC is increased. For this reason, when the storage ratio SOC exceeds the upper limit ratio S2 of the allowable range after the execution of the temporary avoidance control is started, the power of the engine 22 is reduced in order to discharge from the battery 50 (the rotation speed Ne of the engine 22 is set to the upper limit rotation). It is necessary to reduce the rotational speed greater than the number Nf2 to a rotational speed smaller than the lower limit rotational speed Nf1, and the rotational speed Ne of the engine 22 enters the resonance band again (passes through the rotational speed at which the resonance level is maximized). There is a possibility that inconvenience (for example, deterioration in riding comfort and increase in tapping noise) may occur due to a large change in the rotational speed Ne of the engine 22.

  Based on these, the above-described determination process is a process for predicting (determining) whether or not there is a possibility that the above-described inconvenience may occur after the execution of the temporary avoidance control is started.

  When it is predicted (determined) that the storage ratio SOC of the battery 50 can be maintained within a permissible range for a predetermined time when the temporary avoidance control is executed, the reset temporary rotation number Netmp and the reset temporary torque Ttmp described above are Is set to the target rotational speed Ne * and the target torque Te * of the engine 22, and the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are set using this to set the engine ECU 24 and It transmits to motor ECU40. In this case, the rotational speed Ne of the engine 22 is changed to the closer side between the lower limit rotational speed Nf1 and the upper limit rotational speed Nf2 to be out of the resonance band. Thereby, tapping noise can be reduced by a relatively small change in the rotational speed Ne of the engine 22.

  When the temporary avoidance control is executed, the storage ratio SOC of the battery 50 cannot be maintained within the allowable range for a predetermined time, that is, the storage ratio SOC falls outside the allowable range within the predetermined time (below the lower limit ratio S1 or exceeds the upper limit ratio S2). If the engine speed of the engine 22 is far from the lower limit engine speed Nf1, that is, the engine speed of the engine 22 far from the engine speed Ne. When the engine speed Ne * of the engine 22 is far from the upper limit engine speed Nf2, the engine speed slightly smaller than the lower engine speed Nf1 (by the margin α) is reset, and the engine speed Ne is far from the upper engine speed Nf2. Only the margin α) is set to the target rotational speed Ne * again. Then, the target torque Te * of the engine 22 is reset as the intersection of the reset target rotational speed Ne * and the operation line of the engine 22 described above. The operation point composed of the target rotational speed Ne * and the target torque Te * set in this way is an operation point on the operation line. In the example of FIG. 2 described above, when the rotational speed Ne of the engine 22 is the rotational speed of the point A, the point D is set to the target rotational speed Ne * and the target torque Te *, and the rotational speed Ne of the engine 22 is set to the point C. In some cases, the point B is set to the target rotational speed Ne * and the target torque Te *. Then, using these, torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are set and transmitted to the engine ECU 24 and the motor ECU 40 in the same manner as the drive control described above. In this case, the rotational speed Ne of the engine 22 is changed to a side farther from the rotational speed Ne of the engine 22 out of the lower limit rotational speed Nf1 and the upper limit rotational speed Nf2 to be outside the resonance band. By such control, tapping noise can be reduced. Further, after the engine speed Ne is changed to the near side of the lower limit engine speed Nf1 and the upper limit engine speed Nf2 to make it outside the resonance band, the lower limit engine speed Nf1 and the upper engine speed are set in a short time (within a predetermined time). It is possible to suppress the situation where it is necessary to change to the far side of Nf2. As a result, the above-mentioned inconvenience, inconvenience due to the engine speed Ne entering the resonance band again (passing through the engine speed at which the resonance level is maximized), and the engine Ne speed Ne greatly changing ( For example, it is possible to suppress the occurrence of deterioration in riding comfort and increase in tapping noise.

  In addition, the engine 22 has a rotational speed Ne that is changed to the near side of the lower limit rotational speed Nf1 and the upper limit rotational speed Nf2 so as to be outside the resonance band, or when the rotational speed Ne is changed to a far side so as to be out of resonance. Since the operating point is moved on the operation line, the engine 22 has a higher speed than that of the low speed high torque side or the high speed low torque side while maintaining the power of the engine 22. It can suppress that efficiency falls.

  According to the hybrid vehicle 20 of the embodiment described above, when tapping noise is detected within the resonance band of the engine 22, basically, the rotation speed Ne of the engine 22 is set to the lower limit rotation speed of the resonance band. Since Nf1 and the upper limit engine speed Nf2 are changed closer to the outside of the resonance band, tapping noise can be reduced by a relatively small change in the engine speed Ne. Further, when it is predicted that the storage rate SOC of the battery 50 cannot be maintained within a permissible range for a predetermined period of time if the engine speed Ne is changed closer to the lower limit engine speed Nf1 and the upper engine speed Nf2, the engine 22 Because the engine speed Ne is changed to the far side of the lower limit engine speed Nf1 and the upper limit engine speed Nf2 to be outside the resonance band, the engine speed Ne is close to the lower engine speed Nf1 and the upper engine speed Nf2. The rotational speed Ne of the engine 22 reenters the resonance band (passes through the rotational speed at which the resonance level is maximized) in a short time (within a predetermined time) after changing to the outside of the resonance band. It is possible to suppress the occurrence of inconvenience (for example, deterioration in riding comfort and increase in tapping noise) due to a large change in the rotation speed Ne.

  In the hybrid vehicle 20 of the embodiment, when tapping noise is detected within the resonance band of the engine 22 in the resonance band, basically, the rotation speed Ne of the engine 22 is set to the lower limit rotation speed Nf1 and the upper limit rotation speed of the resonance band. Nf2 is changed to be closer to the outside of the resonance band, but when the protection condition for the battery 50 is satisfied, the engine speed Ne of the engine 22 may be out of the resonance band in priority. Good. For example, when the inter-terminal voltage Vb of the battery 50 is equal to or lower than the allowable lower limit voltage, the absolute value of the output limit Wout of the battery 50 is equal to or lower than the allowable lower limit value, and the storage ratio SOC of the battery 50 is equal to or lower than the allowable lower limit value. Therefore, the engine 22 has the rotational speed Ne changed to the upper rotational speed Nf2 side regardless of whether the rotational speed Ne of the engine 22 is closer to the lower limit rotational speed Nf1 or the upper limit rotational speed Nf2. It may be outside. Further, when the voltage Vb between the terminals of the battery 50 is equal to or higher than the allowable upper limit voltage, when the absolute value of the input limit Win of the battery 50 is equal to or lower than the allowable lower limit value, and when the storage ratio SOC of the battery 50 is equal to or higher than the allowable upper limit value. Therefore, regardless of whether the engine speed Ne is closer to the lower limit engine speed Nf1 or the upper engine speed Nf2, the engine speed Ne is changed to the lower engine speed Nf1 side to thereby increase the resonance band. It may be outside. Note that the conditions of the inter-terminal voltage Vb, the input / output limits Win and Wout, and the storage rate SOC of the battery 50 may be given priority in this order.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the engine 22 corresponds to the “engine”, the motor MG1 corresponds to the “first motor”, the planetary gear 30 corresponds to the “planetary gear”, the motor MG2 corresponds to the “second motor”, and the battery 50 Corresponds to the “battery”, and the HVECU 70, the engine ECU 24, and the motor ECU 40 correspond to the “control unit”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the manufacturing industry of hybrid vehicles.

  20 hybrid vehicle, 22 engine, 24 engine electronic control unit (engine ECU), 26 crankshaft, 28 damper, 30 planetary gear, 36 drive shaft, 37 differential gear, 38a, 38b drive wheel, 40 electronic control unit for motor (motor) ECU), 41, 42 inverter, 50 battery, 52 battery electronic control unit (battery ECU), 70 hybrid electronic control unit (HVECU), 80 ignition switch, 81 shift lever, 82 shift position sensor, 83 accelerator pedal, 84 Accelerator pedal position sensor, 85 brake pedal, 86 brake pedal position sensor, 88 vehicle speed sensor, MG1, MG2 motor.

Claims (1)

An engine, a first motor, a drive shaft connected to an axle, a planetary gear in which three rotation elements are connected to an output shaft of the engine and a rotation shaft of the first motor, and a rotation shaft connected to the drive shaft A hybrid vehicle comprising: the second motor, and a battery that exchanges electric power with the first motor and the second motor,
When a predetermined abnormal noise is generated in the mechanical mechanism including the planetary gear accompanying the operation of the engine within the resonance band, the engine rotation speed is set to the maximum rotation speed of the resonance band. Control means for executing a first control to change the minimum rotation speed closer to the outside of the resonance band,
When it is predicted that the storage ratio of the battery cannot be maintained within an allowable range for a predetermined time when the first control is performed when the predetermined abnormal noise occurs, the control means sets the engine speed to the maximum of the resonance band. A means for executing a second control for changing the rotational speed and the minimum rotational speed to the far side to make it out of the resonance band;
Hybrid car.

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