Control device of hybrid vehicle

Abstract

To stabilize an AC voltage outputted by a hybrid vehicle.SOLUTION: An electronic control unit 40, which controls a hybrid vehicle 10 in which an AC inverter 23 and a motor generator 25 are connected to a battery 20 through a power supply line 21, executes feed-back control in which a charging rate of the battery 20 is set to a control quantity and powering / generated electricity by the motor generator 25 is set to an operation quantity when AC output by which a DC voltage of the power supply line 21 is converted by the AC inverter 23 to an AC voltage is turned off, and executes feed-back control in which a voltage of the power supply line 21 is set to the control quantity and the powering / generated electricity by the motor generator 25 is set to the operation quantity, when the AC output is turned on.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a control device for a hybrid vehicle. [Background technology]

[0002] The hybrid vehicle described in Patent Document 1 is equipped with a power supply port for supplying power to external electrical devices. When the battery's charging rate is equal to or higher than a threshold, the hybrid vehicle supplies power stored in the battery to the external devices with the engine stopped. When the battery's charging rate is lower than the threshold, the hybrid vehicle operates the engine and supplies power generated by the engine to the external devices. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2022-67839 Summary of the Invention [Problem to be solved by the invention]

[0004] The battery also supplies power to other onboard devices besides the AC inverter. The DC voltage supplied to the AC inverter fluctuates depending on the usage of the other onboard devices. If the DC voltage fluctuates, the AC voltage output by the AC inverter may also fluctuate. [Means for solving the problem]

[0005] A control device for a hybrid vehicle that solves the above problem is a device for controlling a hybrid vehicle that includes a power supply line connected to a battery, a motor generator connected to the power supply line, and an AC inverter that converts the DC voltage of the power supply line into AC voltage and outputs it, and is configured to perform feedback control using the charging rate of the battery as a controlled variable and the power running / generated power of the motor generator as a manipulated variable when the AC inverter is not outputting the AC voltage, and to perform feedback control using the voltage of the power supply line as a controlled variable and the power running / generated power of the motor generator as a manipulated variable when the AC inverter is outputting the AC voltage. [Effects of the Invention]

[0006] The control device for the hybrid vehicle has the effect of stabilizing the output of AC voltage. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram illustrating a schematic configuration of an embodiment of a control device for a hybrid vehicle; [Figure 2] 4 is a flowchart of a process executed by the control device. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of a control device for a hybrid vehicle will be described in detail below with reference to FIGS. <Configuration of a control device for a hybrid vehicle> First, the configuration of a control device for a hybrid vehicle according to this embodiment will be described with reference to Fig. 1. A hybrid vehicle 10 shown in Fig. 1 includes an engine 11 and a motor generator 25 as drive sources for traveling.

[0009] The hybrid vehicle 10 includes a battery 20 and a power supply line 21 connected to the battery 20. The motor generator 25 is connected to the power supply line 21. The motor generator 25 functions as both a generator that receives external power from the engine 11 or the like to generate electricity, and a motor that receives power supplied from the battery 20 via the power supply line 21 to generate traction torque. In this embodiment, the motor generator 25 also functions as a starter motor for starting the engine 11.

[0010] An AC inverter 23 is also connected to the power supply line 21. The AC inverter 23 converts the DC voltage of the power supply line 21 into AC voltage and outputs it to an AC outlet 26. The AC outlet 26 is an outlet through which the AC voltage is taken out to an external AC electrical device.

[0011] The hybrid vehicle 10 is further equipped with an electronic control unit 40 as a control device. The electronic control unit 40 includes an arithmetic processing device 41 and a storage device 42. The storage device 42 stores programs and data for vehicle control. The electronic control unit 40 performs various controls of the hybrid vehicle 10 by having the arithmetic processing device 41 execute programs read from the storage device 42. The control of the hybrid vehicle 10 performed by the electronic control unit 40 includes control of the engine 11, the motor generator 25, and the AC inverter 23. The electronic control unit 40 is connected to sensors and switches installed in various parts of the hybrid vehicle 10. The sensors and switches include a voltage sensor 43 and an AC switch 44. The voltage sensor 43 is a sensor that detects the voltage of the power supply line 21. The AC switch 44 is a switch that allows a passenger to manually turn on and off the output of AC voltage from the AC inverter 23 to the AC outlet 26. The electronic control unit 40 operates the AC inverter 23 in response to an ON operation of the AC switch 44, and stops the operation of the AC inverter 23 in response to an OFF operation of the AC switch 44.

[0012] <Power control of the motor generator 25> The electronic control unit 40 controls the power of the motor generator 25 as part of the control of the hybrid vehicle 10. The power control of the motor generator 25 will be described below.

[0013] 2 is a flowchart of the process executed by the electronic control unit 40 for power control of the motor generator 25. The electronic control unit 40 repeatedly executes the process of FIG. 2 at predetermined control intervals while the hybrid vehicle 10 is in operation.

[0014] 2 starts, the electronic control unit 40 first determines in step S100 whether the AC inverter 23 is outputting an AC voltage. In the following description, a state in which the AC inverter 23 is outputting an AC voltage will be referred to as an AC output on state. Also, a state in which the AC inverter 23 is not outputting an AC voltage will be referred to as an AC output off state.

[0015] If the electronic control unit 40 determines that the AC output is off (S100: NO), the electronic control unit 40 proceeds to step S110. Then, in step S110, the electronic control unit 40 performs feedback control using the charging rate of the battery 20 as a controlled variable and the power running / generated power of the motor generator 25 as a manipulated variable. For example, the electronic control unit 40 performs feedback control to adjust the power running / generated power of the motor generator 25 so as to maintain the charging rate of the battery 20 within a predetermined range. Note that the electronic control unit 40 obtains the charging rate of the battery 20 based on, for example, the detection results of the charging / discharging current of the battery 20. Then, after processing step S110, the electronic control unit 40 ends the processing of FIG. 2 for the current control cycle.

[0016] On the other hand, if the electronic control unit 40 determines that the AC output is on (S100: YES), the electronic control unit 40 proceeds to step S120. Then, in step S120, the electronic control unit 40 performs feedback control using the voltage of the power supply line 21 as a controlled variable and the power running / generated power of the motor generator 25 as a manipulated variable. For example, the electronic control unit 40 performs feedback control to adjust the power running / generated power of the motor generator 25 so as to maintain the voltage of the power supply line 21 within a predetermined range. Then, after processing step S120, the electronic control unit 40 ends the processing of FIG. 2 for the current control cycle.

[0017] <Actions and Effects of the Embodiment> The operation and effects of the control device for the hybrid vehicle 10 of this embodiment configured as above will be described.

[0018] In hybrid vehicle 10, when AC switch 44 is turned on, AC inverter 23 starts operating. When AC inverter 23 starts operating, it converts the DC voltage of power supply line 21 into AC voltage and outputs it to AC outlet 26.

[0019] The electronic control unit 40, which controls the hybrid vehicle 10 that outputs AC power, switches the power control method for the motor generator 25 depending on whether the AC output is on or off. Specifically, when the AC output is off, the electronic control unit 40 performs feedback control using the charging rate of the battery 20 as the controlled variable and the power running / generated power of the motor generator 25 as the manipulated variable. In this case, the electronic control unit 40 controls the power of the motor generator 25 so as to maintain the charging rate of the battery 20 within a certain range. In contrast, when the AC output is on, the electronic control unit 40 performs feedback control using the voltage of the power supply line 21 as the controlled variable and the power running / generated power of the motor generator 25 as the manipulated variable. In this case, the electronic control unit 40 controls the power of the motor generator 25 so as to maintain the voltage of the power supply line 21 within a certain range. Therefore, when the AC output is on, the DC voltage of the power supply line 21 is more stable than when the AC output is off.

[0020] According to the control device for the hybrid vehicle 10 of the present embodiment described above, the following effects can be achieved. (1) As described above, the DC voltage of power supply line 21 is stabilized when AC output is on, which reduces fluctuations in the AC voltage converted from the DC voltage and output by AC inverter 23. Therefore, the control device for hybrid vehicle 10 of this embodiment has the effect of stabilizing the output of AC voltage.

[0021] (2) It is also possible to stabilize the AC voltage output from AC inverter 23 by prohibiting the operation of motor generator 25 when AC output is on. However, in such a case, motor generator 25 cannot be operated at all when AC output is on. In contrast, in this embodiment, even when AC output is on, motor generator 25 can continue to operate as long as the voltage of power supply line 21 can be maintained within a certain range.

[0022] <Modifications of the embodiment> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0023] The hybrid vehicle 10 may have a configuration different from that shown in FIG. 1, as long as the motor generator 25 and the AC inverter 23 are connected to the battery 20 via the power supply line 21.

[0024] The AC output can be switched on and off automatically instead of manually. [Explanation of symbols]

[0025] 10 Hybrid vehicles 11 Engine 20 Battery 21 Power Line 23 AC inverter 25 Motor generator 26 AC outlets 40 Electronic Control Unit 41 Processing unit 42 Storage device 43 Voltage Sensor 44 AC switch

Claims

[Claim 1] A device for controlling a hybrid vehicle including a power supply line connected to a battery, a motor generator connected to the power supply line, and an AC inverter that converts a DC voltage of the power supply line into an AC voltage and outputs the AC voltage, When the AC inverter is not outputting the AC voltage, feedback control is performed using the charging rate of the battery as a control variable and the power running / generated power of the motor generator as a manipulated variable; When the AC inverter outputs the AC voltage, feedback control is performed using the voltage of the power supply line as a control variable and the power running / generated power of the motor generator as a manipulated variable. A control device for a hybrid vehicle.

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