JP2010120638A - Control device and control method for hybrid car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device of a hybrid car, displaying energy costs in a hybrid car powered by fuel and electricity, to a user. <P>SOLUTION: An ECU 40 calculates cumulative fuel costs of a fuel tank 22 and cumulative power costs of an electricity accumulation device 26 (steps S30, S40), and outputs the calculated cumulative fuel costs and cumulative power costs to a display part 38 (step S50). Also, the ECU 40 calculates fuel consumption costs and power consumption costs per unit time and unit distance (steps S70, S80), and outputs the calculated fuel consumption costs, the power consumption costs and energy consumption costs obtained by combining them to the display part 38 (step S90). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device and a display method for displaying an energy cost of a hybrid vehicle using fuel and electric power as an energy source, and a control device and a control method for a hybrid vehicle using fuel and electric power as an energy source.

  Conventionally, various proposals for making a vehicle travel economically have been made. For example, in recent years, a hybrid vehicle has attracted much attention. A hybrid vehicle is a vehicle that generates power by an electric motor using electric power stored in a power storage device as an energy source in addition to an internal combustion engine using fuel as an energy source.

  On the other hand, proposals have been made to make drivers aware of economical driving. For example, in Japanese Patent Laid-Open No. 2003-220907, in order to give the driver an incentive for fuel-saving behavior, the power consumption of the electric power saving target electric load that is not essential for driving the vehicle and can be operated to reduce the power consumption is set as the fuel consumption and the fuel price. It is disclosed to display to the user as a unit. This publication also discloses that the present invention can be applied not only to gasoline vehicles using gasoline as fuel, but also to internal combustion vehicles, hybrid vehicles, fuel cell vehicles, electric vehicles, etc. that operate on other fuels such as light oil, hydrogen, and methanol. (See Patent Document 1).

JP 2003-220907 A JP 2002-81331 A Japanese Patent No. 3613663

  However, in Japanese Patent Application Laid-Open No. 2003-220907, the power consumption of an electric load subject to power saving is merely converted to fuel consumption or cost and displayed to the user, and the energy cost in a hybrid vehicle using fuel and power as energy sources is disclosed. Cannot be displayed to the user.

  In a hybrid vehicle that can charge a power storage device by driving a generator using the power of an internal combustion engine and also charge the power storage device from a system power supply or a solar battery outside the vehicle, a plurality of power storage devices A charging pass is provided. In such a hybrid vehicle, it is desirable to display the energy cost in consideration of a different charging cost for each charging path.

  Furthermore, in addition to displaying the energy cost, if the vehicle can be controlled to reduce the energy cost, the energy cost can actually be reduced.

  Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to display a hybrid vehicle display device capable of displaying to a user the energy cost in a hybrid vehicle using fuel and electric power as energy sources. Is to provide.

  Another object of the present invention is to provide a display device for a hybrid vehicle that can display to a user the energy cost of the hybrid vehicle having a plurality of charging paths for the power storage device.

  Another object of the present invention is to provide a display method for a hybrid vehicle that can display to the user the energy cost of the hybrid vehicle using fuel and electric power as energy sources.

  Another object of the present invention is to provide a display method of a hybrid vehicle that can display energy costs in a hybrid vehicle having a plurality of charging paths to a power storage device to a user.

  Another object of the present invention is to provide a control device for a hybrid vehicle capable of reducing energy costs in a hybrid vehicle using fuel and electric power as energy sources.

  Another object of the present invention is to provide a hybrid vehicle control method capable of reducing energy costs in a hybrid vehicle using fuel and electric power as energy sources.

  According to this invention, the display device of the hybrid vehicle is a display device that displays the energy cost of the hybrid vehicle that uses fuel and electric power as energy sources. The display device includes: a consumption energy cost calculation unit that calculates a cost of energy consumed in the vehicle based on a consumption amount and unit price of fuel stored in the vehicle and a consumption amount and unit price of power stored in the vehicle; A display unit that displays the energy consumption cost calculated by the energy consumption cost calculation unit to the user.

  Preferably, the energy consumption cost calculation unit calculates the cost of the consumed fuel based on the fuel consumption and unit price stored in the vehicle, and based on the power consumption and unit price stored in the vehicle. Calculate the cost of consumed power. The display unit further displays at least one of the consumed fuel cost and the consumed power cost calculated by the consumed energy cost calculating unit.

  Preferably, the display device of the hybrid vehicle calculates a cost of fuel stored in the vehicle based on a supply amount at the time of fuel supply and a fuel unit price, and based on the calculated accumulated fuel cost and the accumulated amount of fuel. Then, based on the accumulated fuel unit price calculation unit that calculates the unit price of the fuel stored in the vehicle and the amount of charge and the unit price of power when charging the power, the cost of the power stored in the vehicle is calculated, and the calculated storage A storage power unit price calculation unit that calculates a unit price of the power stored in the vehicle based on the power cost and the amount of stored power.

  According to the present invention, the display device for a hybrid vehicle is a display device that displays the energy cost of a hybrid vehicle that uses fuel and electric power as energy sources. Then, the display device calculates the cost of the fuel stored in the vehicle based on the replenishment amount at the time of refueling and the fuel unit price, and is stored in the vehicle based on the charge amount at the time of power charging and the power unit price. A storage energy cost calculation unit that calculates the cost of the stored power, and a display unit that displays to the user the stored fuel cost and the stored power cost calculated by the stored energy cost calculation unit.

  Preferably, the hybrid vehicle includes an internal combustion engine that uses fuel as energy, a power storage device that stores electric power, a power generation device configured to generate power using the power of the internal combustion engine, and to be able to charge the power storage device; And a charging device configured to be able to charge the power storage device by receiving power from or generating power.

  More preferably, the display device of the hybrid vehicle includes a fuel charging cost calculation unit that calculates a cost of electric power charged in the power storage device by the power generation device, based on a charge amount of the power storage device by the power generation device and a power generation unit price of the power generation device. And an external charging cost calculation unit that calculates the cost of the power charged in the power storage device by the charging device based on the amount of charge of the power storage device by the charging device and the unit price of power at the time of charging. The display unit further displays each of the power cost calculated by the fuel charge cost calculation unit and the power cost calculated by the external charge cost calculation unit.

Preferably, the fuel includes a mixed fuel of gasoline and ethanol.
According to the invention, the hybrid vehicle display method is a display method for displaying the energy cost of the hybrid vehicle using fuel and electric power as energy sources. The display method includes a first step of calculating a cost of energy consumed in the vehicle based on a consumption amount and unit price of fuel stored in the vehicle and a consumption amount and unit price of electric power stored in the vehicle; A second step of displaying the calculated energy consumption cost to the user.

  Preferably, the first step includes a first sub-step of calculating a cost of the consumed fuel based on a consumption amount and a unit price of the fuel stored in the vehicle, a consumption amount of the electric power stored in the vehicle, and And a second sub-step of calculating a cost of consumed power based on the unit price. The second step further displays at least one of the fuel consumption cost calculated in the first sub-step and the power consumption cost calculated in the second sub-step.

  Preferably, the display method of the hybrid vehicle calculates the cost of fuel stored in the vehicle based on the replenishment amount at the time of refueling and the unit price of fuel, and based on the calculated accumulated fuel cost and the accumulated amount of fuel. Then, based on the third step of calculating the unit price of the fuel stored in the vehicle, the amount of charge and the unit price of power when charging the power, the cost of the power stored in the vehicle is calculated, and the calculated stored power And a fourth step of calculating a unit price of the electric power stored in the vehicle based on the cost and the amount of electric power stored.

  According to the invention, the hybrid vehicle display method is a display method for displaying the energy cost of the hybrid vehicle using fuel and electric power as energy sources. The display method calculates the cost of the fuel stored in the vehicle based on the replenishment amount and the fuel unit price at the time of fuel replenishment, and is stored in the vehicle based on the charge amount and the power unit price at the time of power charging. A first step of calculating the cost of the stored power, and a second step of displaying the calculated stored fuel cost and stored power cost to the user.

  Preferably, the hybrid vehicle includes an internal combustion engine that uses fuel as energy, a power storage device that stores electric power, a power generation device configured to generate power using the power of the internal combustion engine, and to be able to charge the power storage device; And a charging device configured to be able to charge the power storage device by receiving power from or generating power. The display method includes a fifth step of calculating a cost of power charged in the power storage device by the power generation device based on a charge amount of the power storage device by the power generation device and a power generation unit price of the power generation device, and charging of the power storage device by the charging device And a sixth step of calculating the cost of the electric power charged in the power storage device by the charging device based on the amount and the electric power unit price at the time of charging. In the second step, each of the power cost calculated in the fifth step and the power cost calculated in the sixth step is further displayed.

Preferably, the fuel includes a mixed fuel of gasoline and ethanol.
According to the present invention, the hybrid vehicle control device is a hybrid vehicle control device using fuel and electric power as energy sources. The hybrid vehicle includes an internal combustion engine that uses fuel as energy, a power storage device that stores electric power, a power generation device configured to generate power using the power of the internal combustion engine, and to be able to charge the power storage device, and a power source external to the vehicle. And a charging device configured to be able to charge the power storage device. Then, the control device determines whether the power generation unit price of the power generation device is higher than the power unit price of the external power source, and if the determination unit determines that the power generation unit price is higher than the power unit price, A control unit that controls the power generation device so as to suppress a charge amount of the power storage device.

  According to the present invention, the hybrid vehicle control device is a hybrid vehicle control device using fuel and electric power as energy sources. The hybrid vehicle includes an internal combustion engine that uses fuel as energy, a power storage device that stores electric power, a power generation device configured to generate power using the power of the internal combustion engine, and to be able to charge the power storage device, and a power source external to the vehicle. And a charging device configured to be able to charge the power storage device. Then, the control device calculates the cost of the power stored in the power storage device based on the charge amount at the time of power charging and the power unit price, and based on the calculated stored power cost and the power storage amount of the power storage device, A stored power unit price calculation unit that calculates a unit price of power stored in the power storage device; a determination unit that determines whether the stored power unit price calculated by the stored power unit price calculation unit is higher than the power unit price of the external power source; and When the determination unit determines that the accumulated power unit price is higher than the power unit price, the control unit includes a control unit that controls the power generation device so as to suppress a charge amount of the power storage device by the power generation device.

  Preferably, when the determination unit determines that the unit price of power generation is higher than the unit price of power, the control unit changes the control target of the state quantity indicating the charging state of the power storage device from the first control target to the first control target. Set to a low second control target.

  Further, according to the present invention, the hybrid vehicle control method is a hybrid vehicle control method using fuel and electric power as energy sources. The hybrid vehicle includes an internal combustion engine that uses fuel as energy, a power storage device that stores electric power, a power generation device configured to generate power using the power of the internal combustion engine, and to be able to charge the power storage device, and a power source external to the vehicle. And a charging device configured to be able to charge the power storage device. The control method includes a first step of determining whether the power generation unit price of the power generation apparatus is higher than the power unit price of the external power source, and if it is determined that the power generation unit price is higher than the power unit price, And a second step of controlling the power generation device so as to suppress a charge amount of the device.

  Further, according to the present invention, the hybrid vehicle control method is a hybrid vehicle control method using fuel and electric power as energy sources. The hybrid vehicle includes an internal combustion engine that uses fuel as energy, a power storage device that stores electric power, a power generation device configured to generate power using the power of the internal combustion engine, and to be able to charge the power storage device, and a power source external to the vehicle. And a charging device configured to be able to charge the power storage device. Then, the control method calculates the cost of power stored in the power storage device based on the charge amount at the time of power charging and the power unit price, and based on the calculated stored power cost and the power storage amount of the power storage device, A first step of calculating a unit price of power stored in the power storage device, a second step of determining whether or not the unit price of the stored power calculated in the first step is higher than the unit price of power of the external power source, A third step of controlling the power generation device so as to suppress the amount of charge of the power storage device by the power generation device when it is determined that the stored power unit price is higher than the power unit price.

  In the present invention, the cost of energy (fuel and electric power) consumed in the vehicle is calculated based on the consumption amount and unit price of the fuel stored in the vehicle and the consumption amount and unit price of the electric power stored in the vehicle. The energy cost including not only the cost of consumed fuel (consumed fuel cost) but also the cost of consumed power (power consumption cost) is displayed to the user.

  Therefore, according to the present invention, the total energy consumption cost in the hybrid vehicle using fuel and electric power as energy sources can be presented to the user.

  In the present invention, the cost of the electric power stored in the vehicle (accumulated power cost) is calculated together with the cost of the fuel stored in the vehicle (accumulated fuel cost). And not only the stored fuel cost but also the stored power cost is displayed to the user.

  Therefore, according to the present invention, the cost of energy (fuel and electric power) accumulated in a hybrid vehicle using fuel and electric power as energy sources can be presented to the user.

  In the present invention, if the power generation unit price of the power generation device is determined to be higher than the power unit price of the external power source, the amount of charge of the power storage device by the power generation device is suppressed. A sufficient amount of charge for charging the power storage device is ensured.

  Therefore, according to this invention, the energy cost in the hybrid vehicle which uses fuel and electric power as an energy source can be reduced.

  Further, in this invention, since it is determined that the unit price of the electric power stored in the power storage device (stored power unit price) is higher than the power unit price of the external power source, the amount of charge of the power storage device by the power generation device is suppressed. A sufficient charge amount is secured when charging the power storage device from a relatively low cost external power source.

  Therefore, according to this invention, the energy cost in the hybrid vehicle which uses fuel and electric power as an energy source can be reduced.

1 is a schematic block diagram functionally showing a configuration of a hybrid vehicle to which a display device according to Embodiment 1 of the present invention is applied. It is a flowchart of the control regarding the display process by ECU shown in FIG. 3 is a flowchart of accumulated fuel cost calculation processing shown in FIG. 2. 3 is a flowchart of accumulated power cost calculation processing shown in FIG. 2. It is a flowchart of the consumption fuel cost calculation process shown in FIG. It is a flowchart of the power consumption cost calculation process shown in FIG. It is the figure which showed the control range of SOC of an electrical storage apparatus. It is a flowchart of the cost reduction control by ECU in this Embodiment 2. FIG. It is a flowchart of the cost reduction control by ECU in this Embodiment 3. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
FIG. 1 is a schematic block diagram functionally showing the configuration of a hybrid vehicle to which a display device according to Embodiment 1 of the present invention is applied. Referring to FIG. 1, hybrid vehicle 10 includes an engine 12, motor generators 14 and 16, a power split mechanism 18, a vehicle drive / braking mechanism 20, a fuel tank 22, and a sensor 24. The hybrid vehicle 10 includes a power storage device 26, a sensor 28, a power conversion unit 30, an external charging device 32, an input unit 34, a storage unit 36, a display unit 38, and an ECU (Electronic Control Unit) 40. And further comprising.

  Based on a control command from the ECU 40, the engine 12 generates power by operating a throttle valve, an ignition device, a fuel injection device, etc. (all not shown) provided in the intake pipe. The motor generator 14 generates power using the power of the engine 12 received via the power split mechanism 18 and outputs the generated power to the power conversion unit 30. The motor generator 14 generates driving force by the electric power from the power conversion unit 30 and starts the engine 12 via the power split mechanism 18. The motor generator 16 generates a driving torque of the vehicle with the electric power from the power conversion unit 30 and outputs the generated driving torque to the vehicle driving / braking mechanism 20 via the power split mechanism 18. Motor generator 16 generates power using the rotational force received from vehicle drive / braking mechanism 20 via power split mechanism 18 during regenerative braking of the vehicle, and outputs the generated power to power conversion unit 30.

  The power split mechanism 18 is coupled to the engine 12 and the motor generators 14 and 16 to distribute power between them. For example, the power split mechanism 18 may be a planetary gear mechanism having three rotating shafts: a sun gear, a planetary carrier, and a ring gear. The three rotation shafts are connected to the rotation shafts of engine 12 and motor generators 14 and 16, respectively, and the rotation shaft of motor generator 16 is coupled to vehicle drive / braking mechanism 20.

  The motor generator 14 is incorporated in the hybrid vehicle 10 so as to operate as a generator driven by the engine 12 and operate as an electric motor capable of starting the engine 12, and the motor generator 16 drives the vehicle. It is incorporated in the hybrid vehicle 10 as an electric motor.

  The fuel tank 22 stores the fuel of the engine 12 and supplies the fuel to the engine 12. The fuel of the engine 12 may be gasoline or light oil, or a mixed fuel of gasoline and ethanol. The sensor 24 detects the fuel amount FUEL in the fuel tank 22 and outputs the detected fuel amount FUEL to the ECU 40.

  The power storage device 26 is a DC power source that can be charged and discharged, and includes, for example, a secondary battery such as nickel metal hydride or lithium ion. The power storage device 26 supplies power to the power conversion unit 30. In addition, the power storage device 26 is charged by the power supplied from the power conversion unit 30. Note that a large-capacity capacitor may be used as the power storage device 26. Sensor 28 detects voltage VB of power storage device 26 and current IB input / output to power storage device 26, and outputs the detected voltage VB and current IB to ECU 40.

  Based on a control command from ECU 40, power conversion unit 30 converts the power generated by motor generator 14 using the power of engine 12 into the voltage level of power storage device 26 and outputs the voltage level to power storage device 26. In addition, power conversion unit 30 drives motor generator 14 using electric power received from power storage device 26 based on a control command from ECU 40 when engine 12 is started.

  In addition, power conversion unit 30 drives motor generator 16 using the power received from power storage device 26 based on a control command from ECU 40. In addition, during regenerative braking of the vehicle, power conversion unit 30 converts the power generated by motor generator 16 into a voltage level of power storage device 26 based on a control command from ECU 40 and outputs the voltage level to power storage device 26.

  Further, power conversion unit 30 converts the power received from external charging device 32 into the voltage level of power storage device 26 based on a control command from ECU 40 and outputs the voltage level to power storage device 26. In addition, the power conversion part 30 consists of an inverter, a converter, etc., for example.

  The external charging device 32 is a device for charging the power storage device 26 from a power source outside the vehicle. The external charging device 32 inputs power from a power source outside the vehicle and outputs it to the power conversion unit 30. The power source outside the vehicle includes various power sources such as a system power source and a private power generation facility. Further, the external charging device 32 may include a solar cell or a fuel cell mounted on the vehicle.

  In other words, in this hybrid vehicle 10, the power storage device 26 can be charged by using the external charging device 32 as well as being able to charge the power storage device 26 by generating electricity with the motor generators 14 and 16.

  The input unit 34 is an interface device for inputting a unit price of energy supplied to the hybrid vehicle 10. Specifically, the input unit 34 inputs the unit price of fuel supplied to the hybrid vehicle 10 and the unit price of various electric powers input from the external charging device 32 and outputs them to the ECU 40. The input unit 34 can be a touch panel for the user to input the energy unit price. Moreover, you may comprise the input part 34 with the communication apparatus for connecting wirelessly to a server and acquiring an energy unit price from a server.

  The storage unit 36 stores each energy unit price input from the input unit 34 in accordance with an instruction from the ECU 40, and outputs each stored energy unit price to the ECU 40 in accordance with an instruction from the ECU 40. Further, the storage unit 36 stores the unit price of the fuel accumulated in the fuel tank 22 and the unit price of the electric power stored in the power storage device 26 calculated by a method described later according to an instruction from the ECU 40.

  Hereinafter, the unit price of fuel supplied from the input unit 34 at the time of refueling is also referred to as “replenishment fuel unit price”, and the unit price of fuel stored in the fuel tank 22 is also referred to as “accumulated fuel unit price”. The unit price of power input from the input unit 34 is referred to as “system power unit price” or the like, and the unit price of power stored in the power storage device 26 is also referred to as “stored power unit price”.

  The display unit 38 receives the energy consumption cost calculated by the ECU 40 by the method described later from the ECU 40 and displays it to the user. Here, the consumed energy cost indicates the cost of energy consumed in the hybrid vehicle 10, and more specifically, the cost of fuel consumed per unit time or unit distance (consumed fuel cost) and the cost of electric power. Indicates the total of (power consumption cost). The display unit 38 can receive the energy consumption cost from the ECU 40 by dividing the energy consumption cost into the fuel consumption cost and the power consumption cost, and can individually display the fuel consumption cost and the power consumption cost.

  The display unit 38 receives from the ECU 40 the stored fuel cost of the fuel tank 22 and the stored power cost of the power storage device 26 calculated by the ECU 40 by a method described later and displays them to the user. Here, the accumulated fuel cost indicates the cost of the fuel accumulated in the fuel tank 22. The stored power cost indicates the cost of power stored in the power storage device 26.

  Further, the display unit 38 receives the external charging cost and the fuel charging cost calculated by the ECU 40 by a method described later from the ECU 40 and individually displays them. Here, the external charging cost indicates the total cost when charging the power storage device 26 from the external charging device 32, and the fuel charging cost indicates that the motor generator 14 is regeneratively driven using the power of the engine 12 to power the power storage device 26. Shows the cost of charging.

  ECU 40 generates a control command for driving engine 12, and outputs the generated control command to engine 12. In addition, ECU 40 generates a control command for driving motor generators 14 and 16, and outputs the generated control command to power conversion unit 30. Further, ECU 40 generates a control command for charging power storage device 26 from external charging device 32, and outputs the generated control command to power conversion unit 30.

  Further, the ECU 40 calculates the accumulated fuel cost and the accumulated power cost by a method described later, and outputs the calculated accumulated fuel cost and accumulated power cost to the display unit 38. Further, the ECU 40 calculates the fuel consumption cost and the power consumption cost by a method described later, and outputs the calculated fuel consumption cost and the power consumption cost and the total energy consumption cost to the display unit 38.

  In addition, the ECU 40 receives each unit price of energy input from the input unit 34 from the input unit 34 and outputs the received unit price of energy to the storage unit 36. Further, the ECU 40 calculates the unit fuel cost of the fuel tank 22 by a method described later, and outputs the calculated unit fuel cost to the storage unit 36. In addition, ECU 40 calculates a stored power unit price of power storage device 26 by a method described later, and outputs the calculated stored power unit price to storage unit 36.

  Further, the ECU 40 calculates an external charging cost and a fuel charging cost by a method described later, and outputs the calculated external charging cost and fuel charging cost to the display unit 38.

  In this hybrid vehicle 10, the engine 12 is driven using the fuel in the fuel tank 22, and the power of the engine 12 is output to the vehicle drive / braking mechanism 20 via the power split mechanism 18. In addition, the motor generator 16 is driven by the power conversion unit 30, and the power of the motor generator 16 is output to the vehicle drive / braking mechanism 20 via the power split mechanism 18.

  On the other hand, electric power is generated by motor generator 14 using a part of the power of engine 12, and power storage device 26 is charged. Further, during regenerative braking of the vehicle, regenerative power generation is performed by the motor generator 16 using the rotational force from the vehicle drive / braking mechanism 20, and the power storage device 26 is charged by the regenerative power. Furthermore, the power storage device 26 is charged from the external charging device 32 via the power conversion unit 30.

  In this hybrid vehicle 10, the energy consumption cost in the hybrid vehicle 10 is calculated by the ECU 40 and displayed on the display unit 38. Further, the accumulated fuel cost of the fuel tank 22 and the accumulated power cost of the power storage device 26 are calculated by the ECU 40 and displayed on the display unit 38. Further, the external charging cost from the external charging device 32 and the fuel charging cost using the engine 12 are calculated by the ECU 40 and displayed on the display unit 38.

  FIG. 2 is a flowchart of control related to display processing by the ECU 40 shown in FIG. The process according to this flowchart is called from the main routine and executed every certain time or every time a predetermined condition is satisfied.

  Referring to FIG. 2, ECU 40 obtains each energy unit price input from input unit 34 and stored in storage unit 36 from storage unit 36 (step S10). Next, the ECU 40 calculates the stored energy amount of each energy (step S20). Specifically, the ECU 40 acquires the fuel amount FUEL from the sensor 24, and uses the acquired fuel amount FUEL as the accumulated fuel amount. In addition, the ECU 40 acquires the current IB from the sensor 28, and calculates the accumulated power amount by integrating the acquired current IB.

  When the accumulated fuel amount and the accumulated power amount are calculated, the ECU 40 calculates the accumulated fuel cost of the fuel tank 22 (step S30). Further, the ECU 40 calculates the stored power cost of the power storage device 26 (step S40). The accumulated fuel cost calculation process in step S30 and the accumulated power cost calculation process in step S40 will be described in detail later.

  Then, the ECU 40 outputs the calculated accumulated fuel cost and accumulated power cost to the display unit 38 (step S50). Thereby, the accumulated fuel cost of the fuel tank 22 and the accumulated power cost of the power storage device 26 are displayed to the user by the display unit 38.

  Next, the ECU 40 calculates the energy consumption amount of each energy (step S60). Specifically, the ECU 40 calculates the fuel consumption based on the amount of change in the fuel amount FUEL from the sensor 24. The consumed fuel amount may be estimated from the energization time of the fuel injection device of the engine 12 or the operating state of the engine 12. In addition, the ECU 40 calculates the power consumption based on the current IB and voltage VB from the sensor 28.

  Next, the ECU 40 calculates the cost of the fuel consumed per unit time or unit distance (consumed fuel cost) using the amount of fuel consumed calculated in step S60 (step S70). Further, the ECU 40 calculates the cost of power consumed per unit time or unit distance (power consumption cost) using the power consumption calculated in step S60 (step S80). The fuel consumption cost calculation process in step S70 and the power consumption cost calculation process in step S80 will be described later.

  Then, the ECU 40 outputs the calculated fuel consumption cost and power consumption cost and the energy consumption cost that is the sum thereof to the display unit 38 (step S90). Thereby, the cost of energy consumed in the hybrid vehicle 10 is displayed to the user by the display unit 38.

  Next, the accumulated fuel cost calculation process in step S30 shown in FIG. 2 will be described. The accumulated fuel cost Af is calculated by the following equation (1).

Af = L1 × Cf1 = L0 × Cf0 + ΔL × Cf (1)
Here, L1 is the amount of fuel in the fuel tank 22, and Cf1 is the accumulated fuel unit price indicating the unit price of the fuel stored in the fuel tank 22. L0 and Cf0 are the fuel amount and accumulated fuel unit price at the previous calculation, respectively. Further, ΔL is a fuel replenishment amount from the previous calculation, and Cf is a replenishment fuel unit price input from the input unit 34.

  The accumulated fuel cost Af is calculated by calculating the right side of the equation (1), and the accumulated fuel unit price Cf1 is calculated from the accumulated fuel cost Af and the fuel amount L1. The fuel amount L1 and the accumulated fuel unit price Cf1 are used as L0 and Cf0 at the next calculation, respectively.

  FIG. 3 is a flowchart of the accumulated fuel cost calculation process shown in FIG. Referring to FIG. 3, ECU 40 reads and acquires fuel amount L0 and accumulated fuel unit price Cf0 at the previous calculation from storage unit 36 (step S110). Next, the ECU 40 acquires the supplementary fuel unit price Cf from the storage unit 36, and calculates the cost of the supplemented fuel based on the fuel supplement amount ΔL and the supplementary fuel unit price Cf from the previous calculation (step S120).

  Then, the ECU 40 calculates the accumulated fuel cost Af of the fuel tank 22 using the above equation (1) based on the fuel amount L0, the accumulated fuel unit price Cf0, and the calculated supplementary fuel cost (step S130). Next, the ECU 40 obtains the fuel amount FUEL (= fuel amount L1) from the sensor 24, and calculates the accumulated fuel unit price Cf1 using the above equation (1) based on the accumulated fuel cost Af and the fuel amount L1 ( Step S140). Then, the ECU 40 outputs the updated fuel amount L1 and accumulated fuel unit price Cf1 to the storage unit 36 (step S150).

  Next, the accumulated power cost calculation process in step S40 shown in FIG. 2 will be described. The stored power cost Ae is calculated by the following equation (2).

Ae = W1 × Ce1 = W0 × Ce0 + Σ (ΔW × Ce) (2)
Here, W1 is the amount of power stored in the power storage device 26, and Ce1 is a stored power unit price indicating the unit price of power stored in the power storage device 26. W0 and Ce0 are the amount of electricity stored in the electricity storage device 26 and the unit price of stored power, respectively, at the time of the previous calculation. Further, Σ (ΔW × Ce) is obtained when the motor generator 14 is regeneratively driven to charge the power storage device 26 using the charging cost (external charging cost) of the power storage device 26 by the external charging device 32 and the power of the engine 12. Is the sum of the costs (fuel charge costs). The external charging cost further includes the sum of each charging means (system power supply, solar cell, fuel cell, etc.). ΔW is a charging amount by each charging unit or a charging amount by power generation of the motor generator 14 since the previous calculation, and Ce is an energy unit price input from the input unit 34 or a power generation unit cost of the motor generator 14. . The power generation unit price of the motor generator 14 can be calculated from the fuel consumption amount per unit power generation amount and the accumulated fuel unit price of the fuel tank 22.

  The stored power cost Ae is calculated by calculating the right side of the expression (2), and the stored power unit price Ce1 is calculated from the stored power cost Ae and the stored power amount W1. Then, the charged amount W1 and the stored power unit price Ce1 are used as W0 and Ce0 at the next calculation, respectively.

  FIG. 4 is a flowchart of the stored power cost calculation process shown in FIG. Referring to FIG. 4, ECU 40 reads and obtains storage amount W0 and accumulated power unit price Ce0 at the previous calculation from storage unit 36 (step S210). Next, the ECU 40 acquires each energy unit price from the storage unit 36, calculates a charging cost based on the amount of charge and the energy unit price from the previous calculation for each charging unit of the external charging device 32, and takes the sum. To calculate the external charging cost (step S220). Further, ECU 40 calculates the fuel charging cost based on the amount of charge from the previous calculation by the power generation of motor generator 14 and the power generation unit price of motor generator 14 (step S230).

  Then, ECU 40 outputs the calculated external charging cost and fuel charging cost to display unit 38 (step S240). Thereby, the external charging cost and the fuel charging cost are displayed to the user by the display unit 38.

  Next, the ECU 40 calculates the stored power cost Ae of the power storage device 26 using the above equation (2) based on the stored power amount W0, the stored power unit price Ce0, and the calculated external charging cost and fuel charging cost ( Step S250). Next, the ECU 40 calculates the storage amount W1 of the power storage device 26 based on the storage amount W0 and the current IB from the sensor 28, and uses the above formula (2) based on the stored power cost Ae and the storage amount W1. The stored power unit price Ce1 is calculated (step S260). Then, ECU 40 outputs updated power storage amount W1 and accumulated power unit price Ce1 to storage unit 36 (step S270).

  FIG. 5 is a flowchart of the fuel consumption cost calculation process shown in FIG. Referring to FIG. 5, ECU 40 reads and obtains accumulated fuel unit price Cf1 of fuel tank 22 from storage unit 36 (step S310).

  Then, the ECU 40 multiplies the amount of consumed fuel calculated in step S60 shown in FIG. 2 by the accumulated fuel unit price Cf1, thereby calculating the cost of the consumed fuel, and uses the calculated value as the consumed fuel cost. (Step S320).

  FIG. 6 is a flowchart of the power consumption cost calculation process shown in FIG. Referring to FIG. 6, ECU 40 reads and acquires stored power unit price Ce1 of power storage device 26 from storage unit 36 (step S410).

  Then, the ECU 40 multiplies the power consumption calculated in step S60 shown in FIG. 2 by the accumulated power unit price Ce1 to calculate the cost of the consumed power, and uses the calculated value as the power consumption cost. (Step S420).

  As described above, in the first embodiment, the cost of energy (fuel and electric power) consumed in the hybrid vehicle 10 is calculated. The energy cost including not only the cost of consumed fuel (consumed fuel cost) but also the cost of consumed power (power consumption cost) is displayed to the user. Therefore, according to this Embodiment 1, the total energy cost in the hybrid vehicle 10 can be shown with respect to a user.

  In the first embodiment, the cost of fuel stored in the fuel tank 22 (accumulated fuel cost) and the cost of electric power stored in the power storage device 26 (accumulated power cost) are calculated. And not only the stored fuel cost but also the stored power cost is displayed to the user. Therefore, according to this Embodiment 1, the cost of the energy (fuel and electric power) accumulate | stored in the hybrid vehicle 10 can be shown with respect to a user.

  Further, in the first embodiment, there are a plurality of paths for charging power storage device 26. That is, the motor generator 14 can be regeneratively driven using the power of the engine 12 to charge the power storage device 26, and the power storage device 26 can be charged using the external charging device 32. Then, the cost for charging the power storage device 26 using the power of the engine 12 (fuel charging cost) and the cost for charging the power storage device 26 from the external charging device 32 (external charging cost) are calculated and given to the user. Displayed. Therefore, according to the first embodiment, the charging cost for each charging path can be presented to the user.

[Embodiment 2]
In the second embodiment, in addition to the first embodiment, control for reducing the energy cost in the hybrid vehicle is executed.

  A hybrid vehicle 10A according to the second embodiment includes an ECU 40A instead of the ECU 40 in the configuration of the hybrid vehicle 10 shown in FIG. The ECU 40A compares the power generation unit price of the motor generator 14 with the system power unit price, and controls the engine 12 and the power conversion unit 30 to suppress the power generation amount by the motor generator 14 when the power generation unit price is higher than the system power unit price.

  More specifically, ECU 40A uses voltage VB and current IB from sensor 28 to indicate a state quantity (hereinafter, also simply referred to as “SOC”) that indicates a state of charge (SOC) of power storage device 26. The charge / discharge of the power storage device 26 is controlled so that the SOC falls within a certain range. Then, the ECU 40A sets the SOC control range lower when the power generation unit price is higher than the system power unit price than when the power generation unit price is less than or equal to the system power unit price. When the SOC control range is set low, the amount of power generated by motor generator 14 is suppressed.

  The reason why the power generation amount by the motor generator 14 is suppressed when the power generation unit price is higher than the system power unit price is that a sufficient amount of charge can be ensured by the system power whose unit price is lower than that generated by the motor generator 14. Then, charging the power storage device 26 from the system power supply at the charging point reduces the accumulated power cost of the power storage device 26.

  The other configuration (function) of ECU 40A is the same as that of ECU 40 in the first embodiment. Other configurations (functions) of hybrid vehicle 10A are the same as those of hybrid vehicle 10 in the first embodiment.

  FIG. 7 is a diagram showing the SOC control range of power storage device 26. Referring to FIG. 7, SU1 indicates a control upper limit value of SOC, and SL1 indicates a control lower limit value of SOC. ECU 40 controls charging / discharging of power storage device 26 such that the SOC is controlled within control range ΔS1 defined by control upper limit value SU1 and control lower limit value SL1.

  Here, ECU 40 lowers control upper limit value SU1 to SU2 and lowers control lower limit value SL1 to SL2 when the power generation unit price of motor generator 14 is higher than the system power unit price. Therefore, ECU 40 controls charging / discharging of power storage device 26 such that the SOC is controlled within control range ΔS2 defined by control upper limit value SU2 and control lower limit value SL2 when the power generation unit price is higher than the system power unit price. . Thereby, the electric power generation amount by the motor generator 14 is suppressed.

  FIG. 8 is a flowchart of cost reduction control by the ECU 40A in the second embodiment. Note that the processing according to this flowchart is also called from the main routine and executed at regular time intervals or whenever a predetermined condition is satisfied.

  Referring to FIG. 8, ECU 40A reads and obtains system power unit price Ce, which is input from input unit 34 and stored in storage unit 36, from storage unit 36 (step S510). Further, ECU 40A calculates a power generation unit price of motor generator 14 (step S520). The power generation unit price of the motor generator 14 can be calculated from the fuel consumption amount per unit power generation amount and the accumulated fuel unit price of the fuel tank 22.

  Next, ECU 40A determines whether or not the power generation unit price of motor generator 14 is higher than system power unit price Ce (step S530). When ECU 40A determines that the power generation unit price is equal to or less than system power unit price Ce (NO in step S530), it sets control upper limit value SU1 and control lower limit value SL1 as the upper and lower control limits of SOC of power storage device 26 (step S550). .

  On the other hand, when it is determined in step S530 that the power generation unit price is higher than system power unit price Ce (YES in step S530), ECU 40A determines control upper limit value SU2 (<SU1) and the upper and lower control limits of SOC of power storage device 26. A control lower limit value SL2 (<SL1) is set (step S540).

  As described above, in this second embodiment, if it is determined that the unit price of power generation of motor generator 14 is higher than unit price of grid power Ce, the amount of charge of power storage device 26 due to the power generation of motor generator 14 is suppressed. Thus, a sufficient amount of charge is secured when charging the power storage device 26 from a relatively low-cost system power supply. Therefore, according to the second embodiment, the energy cost in hybrid vehicle 10A can be reduced.

[Embodiment 3]
In the third embodiment, as in the second embodiment, control for reducing the energy cost in the hybrid vehicle is executed.

  Hybrid vehicle 10B in the third embodiment includes ECU 40B in place of ECU 40 in the configuration of hybrid vehicle 10 shown in FIG. ECU 40B calculates stored power unit price Ce1 of power storage device 26 by the above-described method. The ECU 40B compares the stored power unit price Ce1 with the system power unit price, and controls the engine 12 and the power conversion unit 30 to suppress the power generation amount by the motor generator 14 when the stored power unit price Ce1 is higher than the system power unit price. To do.

  More specifically, ECU 40B calculates SOC of power storage device 26 using voltage VB and current IB from sensor 28, and controls charging / discharging of power storage device 26 so that the SOC falls within a certain range. The ECU 40B sets the SOC control range lower when the stored power unit price Ce1 is higher than the system power unit price than when the stored power unit price Ce1 is equal to or lower than the system power unit price. When the SOC control range is set low, the amount of power generated by motor generator 14 is suppressed.

  The reason why the amount of power generated by the motor generator 14 is suppressed when the stored power unit price Ce1 is higher than the system power unit price is that a sufficient amount of charge can be secured by the system power whose unit price is lower than the power stored in the power storage device 26. It is. Then, charging the power storage device 26 from the system power supply at the charging point reduces the accumulated power cost of the power storage device 26.

  The other configuration (function) of ECU 40B is the same as that of ECU 40 in the first embodiment. Other configurations (functions) of hybrid vehicle 10B are the same as those of hybrid vehicle 10 in the first embodiment.

  FIG. 9 is a flowchart of cost reduction control by the ECU 40B in the third embodiment. Note that the processing according to this flowchart is also called from the main routine and executed at regular time intervals or whenever a predetermined condition is satisfied.

  Referring to FIG. 9, this flowchart includes steps S525 and S535 in place of steps S520 and S530 in the flowchart shown in FIG. That is, when system power unit price Ce is acquired from storage unit 36 in step S510, ECU 40B reads and acquires stored power unit price Ce1 of power storage device 26 from storage unit 36 (step S525). The stored power unit price Ce1 is calculated in step S260 shown in FIG. 4 and output to the storage unit 36 in step S270.

  Next, the ECU 40B determines whether or not the accumulated power unit price Ce1 is higher than the system power unit price Ce (step S535). If ECU 40B determines that stored power unit price Ce1 is higher than system power unit price Ce (YES in step S535), the process proceeds to step S540, where control upper limit value SU2 and control lower limit value are set as the upper and lower control limits of the SOC of power storage device 26. Set the value SL2.

  On the other hand, when it is determined in step S535 that accumulated power unit price Ce1 is equal to or less than system power unit price Ce (NO in step S535), ECU 40B proceeds to step S550 and sets the SOC upper and lower limit values of SOC of power storage device 26. A control upper limit value SU1 and a control lower limit value SL1 are set.

  As described above, in the third embodiment, when it is determined that the unit price of power stored in power storage device 26 (stored power unit price) is higher than the system power unit price, power storage device 26 by power generation by motor generator 14 is performed. Therefore, a sufficient amount of charge is secured when charging the power storage device 26 from a relatively low-cost system power supply. Therefore, according to the third embodiment, the energy cost in hybrid vehicle 10B can be reduced.

  In each of the above-described embodiments, hybrid vehicles 10, 10 A, and 10 B can transmit power of engine 12 divided into vehicle drive / braking mechanism 20 and motor generator 14 by power split mechanism 18. Although this is a parallel type, the present invention uses the engine 12 only for driving the motor generator 14, and the series type hybrid that generates the driving force of the vehicle only by the motor generator 16 that uses the electric power generated by the motor generator 12. It can also be applied to vehicles.

  In the above, the processing executed by the ECU 40 in steps S70 and S80 corresponds to the processing by the “consumption energy cost calculation unit” in the present invention. The processing executed by the ECU 40 in steps S120 to S140 corresponds to the processing by the “accumulated fuel unit price calculation unit” in the present invention, and the processing executed by the ECU 40 in steps S220 to S260 (excluding step S240) is: This corresponds to the processing by the “stored power unit price calculation unit” in the present invention. Furthermore, the processing executed by the ECU 40 in steps S30 and S40 corresponds to the processing by the “stored energy cost calculation unit” in the present invention.

  Further, engine 12 corresponds to “internal combustion engine” in the present invention, and motor generator 14 corresponds to “power generation device” in the present invention. Furthermore, external charging device 32 corresponds to “charging device” in the present invention. Further, the process executed by the ECU 40 in step S230 corresponds to the process by the “fuel charge cost calculation unit” in the present invention, and the process executed by the ECU 40 in step S220 is the “external charge cost calculation” in the present invention. This corresponds to the processing by “part”.

  Furthermore, the processing executed by ECU 40A in step S530 and the processing executed by ECU 40B in step S535 correspond to the processing by the “determination unit” in the present invention, and the processing executed by ECUs 40A and 40B in step S540 is This corresponds to the processing by the “control unit” in the present invention.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  10, 10A, 10B Hybrid vehicle, 12 Engine, 14, 16 Motor generator, 18 Power split mechanism, 20 Vehicle drive / braking mechanism, 22 Fuel tank, 24, 28 Sensor, 26 Power storage device, 30 Power converter, 32 External charging Device, 34 input unit, 36 storage unit, 38 display unit, 40, 40A, 40B ECU.

Claims (3)

A control device for a hybrid vehicle using fuel and electric power as energy sources,
The hybrid vehicle
An internal combustion engine using the fuel as energy,
A power storage device for storing the power;
A power generation device configured to generate power using the power of the internal combustion engine and to charge the power storage device;
A charging device configured to be able to charge the power storage device from a power source external to the vehicle,
The control device includes:
Based on the charged amount and the unit price of electric power charging, the cost of the electric power stored in the power storage device is calculated, and the power storage device is calculated based on the calculated stored power cost and the stored power amount of the power storage device. A stored power unit price calculation unit for calculating a unit price of stored power;
A determination unit that determines whether or not the stored power unit price calculated by the stored power unit price calculation unit is higher than a power unit price of the power source;
A hybrid vehicle comprising: a control unit that controls the power generation device so as to suppress a charge amount of the power storage device by the power generation device when the determination unit determines that the accumulated power unit price is higher than the power unit price Control device.   When the determination unit determines that the unit price of power generation is higher than the unit price of power, the control unit changes a control target of a state quantity indicating a charge state of the power storage device from the first control target to the first control. The hybrid vehicle control device according to claim 1, wherein the control device is set to a second control target lower than the target. A method for controlling a hybrid vehicle using fuel and electric power as energy sources,
The hybrid vehicle
An internal combustion engine using the fuel as energy,
A power storage device for storing the power;
A power generation device configured to generate power using the power of the internal combustion engine and to charge the power storage device;
A charging device configured to be able to charge the power storage device from a power source external to the vehicle,
The control method is:
Based on the charged amount and the unit price of electric power charging, the cost of the electric power stored in the power storage device is calculated, and the power storage device is calculated based on the calculated stored power cost and the stored power amount of the power storage device. A first step of calculating a unit price of the stored power;
A second step of determining whether or not the stored power unit price calculated in the first step is higher than the power unit price of the power source;
Control of a hybrid vehicle comprising: a third step of controlling the power generation device so as to suppress a charge amount of the power storage device by the power generation device when it is determined that the stored power unit price is higher than the power unit price Method.

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