HYBRID VEHICLE AND CONTROL METHOD THEREOF
First Claim
1. A hybrid vehicle, comprising:
- an internal combustion engine;
an electric power-mechanical power input output assembly connected with an output shaft of the internal combustion engine and with a driveshaft linked to an axle and constructed to utilize a reactive force on the driveshaft and input and output a torque from and to the output shaft of the internal combustion engine through input and output of electric power and mechanical power;
a motor arranged to input and output power from and to the driveshaft;
an accumulator configured to transmit electric power to and from the electric power-mechanical power input output assembly and the motor;
a temperature detector constructed to detect temperature of the accumulator;
an allowable maximum electric power setting module configured to set an allowable maximum electric power to be charged into the accumulator or to be discharged from the accumulator according to the detected temperature of the accumulator;
a fuel consumption priority switch operated to give an instruction for a drive with priority to fuel consumption; and
an intermittent operation permission/prohibition module configured to, in a setting of the fuel consumption priority switch giving no instruction for the drive with priority to the fuel consumption, prohibit intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is less than a first electric power and to permit the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is not less than the first electric power,the intermittent operation permission/prohibition module being configured to, in a setting of the fuel consumption priority switch giving the instruction for the drive with priority to the fuel consumption, prohibit the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is less than a second electric power that is smaller than the first electric power and to permit the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is not less than the second electric power.
1 Assignment
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Accused Products
Abstract
In an OFF condition of an ECO switch, a stop decision reference value Wstop is set to a value W1 (step S420). In an ON condition of the ECO switch, the stop decision reference value Wstop is set to a value W2 (step S430). When an output limit Wout of a battery set according to a battery temperature and a state of charge of the battery is not less than the set stop decision reference value Wstop, the engine is permitted to stop (step S450). When the output limit Wout is less than the set stop decision reference value Wstop, the engine is prohibited from stopping (step S460). The value W1 is specified as a value of electric power required for a smooth restart of the engine after its stop during a drive of the vehicle. The value W2 is specified to be close to a value of minimum electric power required for a restart of the engine after its stop during a drive of the vehicle and is set to be smaller than the value W1.
28 Citations
9 Claims
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1. A hybrid vehicle, comprising:
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an internal combustion engine; an electric power-mechanical power input output assembly connected with an output shaft of the internal combustion engine and with a driveshaft linked to an axle and constructed to utilize a reactive force on the driveshaft and input and output a torque from and to the output shaft of the internal combustion engine through input and output of electric power and mechanical power; a motor arranged to input and output power from and to the driveshaft; an accumulator configured to transmit electric power to and from the electric power-mechanical power input output assembly and the motor; a temperature detector constructed to detect temperature of the accumulator; an allowable maximum electric power setting module configured to set an allowable maximum electric power to be charged into the accumulator or to be discharged from the accumulator according to the detected temperature of the accumulator; a fuel consumption priority switch operated to give an instruction for a drive with priority to fuel consumption; and an intermittent operation permission/prohibition module configured to, in a setting of the fuel consumption priority switch giving no instruction for the drive with priority to the fuel consumption, prohibit intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is less than a first electric power and to permit the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is not less than the first electric power, the intermittent operation permission/prohibition module being configured to, in a setting of the fuel consumption priority switch giving the instruction for the drive with priority to the fuel consumption, prohibit the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is less than a second electric power that is smaller than the first electric power and to permit the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is not less than the second electric power. - View Dependent Claims (2, 3)
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4. A hybrid vehicle equipped with a battery having a characteristic of lowering an output performance in a low temperature condition than in an ordinary temperature condition and configured to be drivable in a motor drive mode with driving power given by only a motor,
the hybrid vehicle having: -
a switch operated on and off to selectively give priority to fuel consumption as a decision level for an engine start in the motor drive mode with the driving power given by only the motor, in an ON condition of the switch, the decision level for the engine start is changed according to a battery temperature.
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5. A hybrid vehicle, comprising:
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an internal combustion engine; an electric power-mechanical power input output assembly connected with an output shaft of the internal combustion engine and with a driveshaft linked to an axle and constructed to utilize a reactive force on the driveshaft and input and output a torque from and to the output shaft of the internal combustion engine through input and output of electric power and mechanical power; a motor arranged to input and output power from and to the driveshaft; an accumulator configured to transmit electric power to and from the electric power-mechanical power input output assembly and the motor; a temperature detector constructed to detect temperature of the accumulator; a fuel consumption priority switch operated to give an instruction for a drive with priority to fuel consumption; and an intermittent operation permission/prohibition module configured to, in a setting of the fuel consumption priority switch giving no instruction for the drive with priority to the fuel consumption, prohibit intermittent operation of the internal combustion engine when the detected temperature of the accumulator is lower than a first temperature and to permit the intermittent operation of the internal combustion engine when the detected temperature of the accumulator is not lower than the first temperature, the intermittent operation permission/prohibition module being configured to, in a setting of the fuel consumption priority switch giving the instruction for the drive with priority to the fuel consumption, prohibit the intermittent operation of the internal combustion engine when the detected temperature of the accumulator is lower than a second temperature that is less than the first temperature and to permit the intermittent operation of the internal combustion engine when the detected temperature of the accumulator is not lower than the second temperature. - View Dependent Claims (6, 7)
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8. A control method of a hybrid vehicle, the hybrid vehicle having:
- an internal combustion engine;
an electric power-mechanical power input output assembly connected with an output shaft of the internal combustion engine and with a driveshaft linked to an axle and constructed to utilize a reactive force on the driveshaft and input and output a torque from and to the output shaft of the internal combustion engine through input and output of electric power and mechanical power;
a motor arranged to input and output power from and to the driveshaft; and
an accumulator configured to transmit electric power to and from the electric power-mechanical power input output assembly and the motor,the control method comprising; (a) setting an allowable maximum electric power to be charged into the accumulator or to be discharged from the accumulator according to temperature of the accumulator; and (b) in a setting of a fuel consumption priority switch giving no instruction for a drive with priority to fuel consumption, prohibiting intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is less than a first electric power and permitting the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is not less than the first electric power, and in a setting of the fuel consumption priority switch giving the instruction for the drive with priority to the fuel consumption, prohibiting the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is less than a second electric power that is smaller than the first electric power and permitting the intermittent operation of the internal combustion engine when the set allowable maximum electric power of the accumulator is not less than the second electric power.
- an internal combustion engine;
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9. A control method of a hybrid vehicle, the hybrid vehicle having:
- an internal combustion engine;
an electric power-mechanical power input output assembly connected with an output shaft of the internal combustion engine and with a driveshaft linked to an axle and constructed to utilize a reactive force on the driveshaft and input and output a torque from and to the output shaft of the internal combustion engine through input and output of electric power and mechanical power;
a motor arranged to input and output power from and to the driveshaft; and
an accumulator configured to transmit electric power to and from the electric power-mechanical power input output assembly and the motor,the control method comprising; in a setting of a fuel consumption priority switch giving no instruction for a drive with priority to fuel consumption, prohibiting intermittent operation of the internal combustion engine when temperature of the accumulator is lower than a first temperature and permitting the intermittent operation of the internal combustion engine when the temperature of the accumulator is not lower than the first temperature, and in a setting of the fuel consumption priority switch giving the instruction for the drive with priority to the fuel consumption, prohibiting the intermittent operation of the internal combustion engine when the temperature of the accumulator is lower than a second temperature that is less than the first temperature and permitting the intermittent operation of the internal combustion engine when the temperature of the accumulator is not lower than the second temperature.
- an internal combustion engine;
Specification