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Moving-object-with-fuel-cells-incorporated-therein-and-method-of-controlling-the-same

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Details

Inventors: Tabata, Atsushi;
Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota, JP)
Primary Examiner: Johnson; Brian
Assistant Examiner: Bottorff; Christopher
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

In a hybrid vehicle with fuel cells and an engine mounted thereon as energy output sources, a technique is employed that adequately changes a working energy output source according to a driving state of the hybrid vehicle. The hybrid vehicle has the engine and a motor, both enabling power to be output to an axle. The hybrid vehicle also has fuel cells as a main electric power supply for driving the motor. The technique changes the working energy output source between the fuel cells and the engine, in order to reduce the output of the fuel cells with consumption of a fuel for the fuel cells. With a decrease in remaining quantity of the fuel, the technique narrows a specific driving range, in which the motor is used as the power source. The technique also causes the engine to drive the motor as a generator and charges a battery not with electric power of the fuel cells but with electric power generated by the motor. This arrangement effectively prevents the fuel for the fuel cells from being excessively consumed in one driving mode. The fuel cells can thus be used preferentially in a specific driving state of the hybrid vehicle where the fuel cells have a high efficiency.

DETAILED DESCRIPTION One object of the present invention is thus to provide a moving object with fuel cells mounted thereon, which effectively uses the fuel cells as an energy output source and has excellent fuel consumption and environmental properties.
Another object of the present invention is to provide a simple structure that effectively prevents confusion between a plurality of fuels supplied.
Still another object of the present invention is to provide a technique that efficiently controls a variation in torque output from a heat engine with a torque of a motor.
At least part of the above and other related objects is actualized by a first moving object having at least two energy output sources including a fuel cell.
The first moving object includes: a detector that measures at least either one of an output sustaining ability and a variation thereof with regard to at least one of the at least two energy output sources; and an output controller that controls an output state of energy from each of the at least two energy output sources, based on a result of the measurement by the detector, so as to ensure output of a required total energy.
The first moving object of the present invention has at least two energy output sources including fuel cells.
The energy output source outputs energy in a variety of forms including mechanical energy and electrical energy.
The fuel cells are the energy output source that outputs electrical energy.
It is not necessary that the at least two energy output sources output different forms of energy.
The at least two energy output sources may, however, output the same form of energy as in the case of the fuel cells and a secondary battery.
The first moving object of the present invention controls the output state of each of the plural energy output sources according to its output sustaining ability.
For example, the fuel cells can be controlled to have the output according to at least either one of the output sustaining ability and the variation thereof.
The output sustaining ability here means a total quantity of energy that can be output continuously from each energy output source

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