Motor vehicle with hybrid drive
First Claim
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1. Motor vehicle, with a hybrid drive device having an internal combustion engine, at least one electric machine at least one electric energy storage mechanism;
- a fuel cell system for generating electric power, wherein the fuel cell system is an auxiliary power source for delivering a lower power than the internal combustion engine;
a control unit controls the operation of the fuel cell system to operate continuously in a predetermined operating range or at a predetermined operating point of a high efficiency, with the power the fuel cell system delivers being supplied at least to one power consuming device and any excess power of the fuel cell system being supplied to at least one additional power consuming device as required to maintain high fuel cell system efficiency.
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Abstract
Motor vehicle having a hybrid drive and a fuel cell system. When activated, the fuel cell system can be operated continuously in a predetermined operating range or at a predetermined operating point of high efficiency, whereby any excess energy generated can be supplied to a power consuming device to maintain the high power withdrawal from the fuel cell system required for said high efficiency.
13 Citations
11 Claims
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1. Motor vehicle, with a hybrid drive device having an internal combustion engine, at least one electric machine at least one electric energy storage mechanism;
- a fuel cell system for generating electric power, wherein the fuel cell system is an auxiliary power source for delivering a lower power than the internal combustion engine;
a control unit controls the operation of the fuel cell system to operate continuously in a predetermined operating range or at a predetermined operating point of a high efficiency, with the power the fuel cell system delivers being supplied at least to one power consuming device and any excess power of the fuel cell system being supplied to at least one additional power consuming device as required to maintain high fuel cell system efficiency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a fuel cell system for generating electric power, wherein the fuel cell system is an auxiliary power source for delivering a lower power than the internal combustion engine;
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9. Method for operating a motor vehicle with a hybrid drive device having an internal combustion engine, at least one electric machine, a fuel cell system for generating electric power which delivers a lower power than the internal combustion engine, and at least one electric power storage mechanism, comprising the steps of
activating the fuel cell system; -
operating the fuel cell system continuously in an operating range or at an operating point of high efficiency; supplying at least a portion of the power generated by the fuel cell system to at least one power consuming device; supplying any excess power generated by the fuel cell system to at least one other power consuming device in order to maintain a power demand on the fuel cell system corresponding to high efficiency operating range or operating point. - View Dependent Claims (10, 11)
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Specification