Patent ID: 7798266

Claim:
A hybrid system comprising: an electrical motor generating motive power; a storing portion providing electrical power to the electrical motor; a fuel cell that provides electrical power to the storing portion or both the electrical motor and the storing portion within a predetermined output range; an internal combustion engine outputting to loading of the electrical motor; a determination portion that determines whether a required output of the electrical motor is above a maximum output in the predetermined output range; and a control portion that controls the internal combustion engine so as to operate if it is determined that the required output of the electrical motor is above the maximum output in the predetermined output range, wherein the predetermined output range is the range where a heat efficiency of the fuel cell is above a maximum heat efficiency of the internal combustion engine, a heat efficiency of the internal combustion engine is a ratio of an output to be provided to the electrical motor or the storing portion from the internal combustion engine to an energy used by the internal combustion engine, and the heat efficiency of the fuel cell is a ratio of an output to be provided to the electrical motor through the storing portion from the fuel cell to an energy used by the fuel cell.