Control device of a hybrid vehicle
First Claim
1. A control device of a hybrid vehicle, the vehicle comprising an internal combustion engine as a power source for running the vehicle together with an electric motor, a high voltage battery which supplies electric current for driving the electric motor, and a low voltage battery which supplies electric current for a vehicle-mounted electrical load, the control device comprising:
- a sensor for detecting a vehicle running state, and a microprocessor programmed to;
determine a deceleration state of the vehicle, cause the electric motor to function as a generator in the deceleration state, perform control to charge the high voltage battery and low voltage battery by the current generated by the electric motor, limit the current generated by the electric motor by a limiter, cause the electric motor to generate a limited current, and vary the limited current according to the running state.
1 Assignment
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Accused Products
Abstract
When a vehicle is decelerating a controller of a motor-generator (2) computes a target charging current according to a charge state of a high voltage battery by a target charging current computing unit (23), and limits this current by a first limiter (24) having a limiter value. An electrical load current supplied to vehicle-mounted electrical loads is computed by an electrical load current detecting unit (27). A target generation current produced by the motor-generator (2) is computed by adding the target charging current and electrical load current, by a target generation current detecting unit (28, 30). This computed value is limited by a second limiter (31) having a limiter value which varies according to an engine rotation speed, ON/OFF state of an air-conditioner and speed ratio. When the vehicle is decelerating the motor-generator (2) is made to function as a generator driven by recovery energy, the high voltage battery and a low voltage battery for the vehicle-mounted electrical loads are charged without overcharging and excessive vehicle deceleration is prevented.
67 Citations
10 Claims
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1. A control device of a hybrid vehicle, the vehicle comprising an internal combustion engine as a power source for running the vehicle together with an electric motor, a high voltage battery which supplies electric current for driving the electric motor, and a low voltage battery which supplies electric current for a vehicle-mounted electrical load, the control device comprising:
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a sensor for detecting a vehicle running state, and a microprocessor programmed to;
determine a deceleration state of the vehicle, cause the electric motor to function as a generator in the deceleration state, perform control to charge the high voltage battery and low voltage battery by the current generated by the electric motor, limit the current generated by the electric motor by a limiter, cause the electric motor to generate a limited current, and vary the limited current according to the running state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control device of a hybrid vehicle, the vehicle comprising an internal combustion engine as a power source for running the vehicle together with an electric motor, a high voltage battery which supplies electric current for driving the electric motor, and a low voltage battery which supplies electric current for a vehicle-mounted electrical load, the control device comprising:
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a sensor which detects a state of charge of the high voltage battery, and a microprocessor programmed to;
compute a target charging current to charge the high voltage battery according to the state of charge of the high voltage battery, compute an electrical load current supplied to the vehicle-mounted electrical load, compute a target generation current generated by the electric motor by adding the target charging current and the electrical load current, limit the target generation current by a limiter, and limit the target generation current by another limiter. - View Dependent Claims (9)
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10. A control device of a hybrid vehicle, the vehicle comprising an internal combustion engine as a power source for running the vehicle together with an electric motor, a high voltage battery which supplies electric current for driving the electric motor, and a low voltage battery which supplies electric current for a vehicle-mounted electrical load, the control device comprising:
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means for detecting a vehicle running state, means for determining a deceleration state of the vehicle, means for causing the electric motor to function as a generator in the deceleration state, means for performing control to charge the high voltage battery and low voltage battery by the current generated by the electric motor, and means for limiting the current generated by the electric motor by a limiter, means for causing the electric motor to generate a limited current, and means for varying the limited current according to the running state.
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Specification