Reprogramming system and electronic control unit for hybrid vehicle
First Claim
1. A reprogramming system for a hybrid vehicle equipped with a main battery supplying an electric power of a high voltage to an electric motor capable of driving the hybrid vehicle and an auxiliary battery supplying an electric power of a voltage lower than the high voltage of the main battery to electric devices mounted on the hybrid vehicle, and the reprogramming system comprising:
- an electric control unit, to which the auxiliary battery supplies the electric power, configured to perform a reprogramming process of replacing a program stored in an internal memory unit in the electric control unit with a new program transferred from a program supply device that is an outside device of the hybrid vehicle when a specified condition is satisfied;
auxiliary battery voltage judgment means configured to judge whether or not the voltage of the auxiliary battery is not more than a reprogramming executable voltage necessary of performing the reprogramming process by the electric control unit; and
auxiliary battery charging means configured to charge the auxiliary battery with the electric power of the main battery when the judgment result of the auxiliary battery voltage judgment means indicates that the voltage of the auxiliary battery is lower than the voltage of the reprogramming executable voltage.
1 Assignment
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Accused Products
Abstract
A reprogramming system such as an electric control unit (ECU) mounted on a hybrid vehicle so controls that an auxiliary battery is charged from the main battery when a voltage of the auxiliary battery is lower than an executable voltage which is a necessary voltage of adequately performing a reprogramming process. Further, the ECU controls that the main battery is charged when the voltage of the main battery is lower than a chargeable voltage which is a necessary voltage of adequately charge the auxiliary battery with an electric power. A reprogramming system mounted on the hybrid vehicle performs the reprogramming process of replacing a program stored in an internal memory unit of the ECU with a new program transferred from a reprogramming device when the voltage of the auxiliary battery is not less than an executable voltage.
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Citations
12 Claims
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1. A reprogramming system for a hybrid vehicle equipped with a main battery supplying an electric power of a high voltage to an electric motor capable of driving the hybrid vehicle and an auxiliary battery supplying an electric power of a voltage lower than the high voltage of the main battery to electric devices mounted on the hybrid vehicle, and the reprogramming system comprising:
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an electric control unit, to which the auxiliary battery supplies the electric power, configured to perform a reprogramming process of replacing a program stored in an internal memory unit in the electric control unit with a new program transferred from a program supply device that is an outside device of the hybrid vehicle when a specified condition is satisfied; auxiliary battery voltage judgment means configured to judge whether or not the voltage of the auxiliary battery is not more than a reprogramming executable voltage necessary of performing the reprogramming process by the electric control unit; and auxiliary battery charging means configured to charge the auxiliary battery with the electric power of the main battery when the judgment result of the auxiliary battery voltage judgment means indicates that the voltage of the auxiliary battery is lower than the voltage of the reprogramming executable voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric control unit capable of electrically connecting a main battery of a high voltage to an auxiliary battery through electric connection means which are mounted on a hybrid vehicle in which the main battery supplies the electric power of the high voltage to an electric motor for driving the hybrid vehicle and the auxiliary battery supplies an electric power whose voltage is lower than the voltage of the main battery to electric devices mounted on the hybrid vehicle, and the electric control unit configured to perform a reprogramming process of replacing a program stored in a memory with a new program transferred from a program supply device located at the outside of the hybrid vehicle when a specified condition is established, and the electric control unit comprising:
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auxiliary battery voltage judgment means configured to detect the voltage of the auxiliary battery and to judge whether or not the voltage of the auxiliary battery is not more than a reprogramming executable voltage necessary to performing the reprogramming process; and start instruction output means configured to output a start instruction to the electric connection means in order to initiate the electrical connection between the main battery and the auxiliary battery when the judgment result of the auxiliary battery voltage judgment means indicates that the voltage of the auxiliary battery is lower than the reprogramming executable voltage.
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Specification