Engine generator apparatus and method of operating same
First Claim
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1. An engine generator apparatus having a motor/generator operated in a motor mode for starting an engine and in a generator mode to be driven by the engine, comprising:
- first control means for minimizing field current when a changeover is made from the motor mode to the generator mode;
second control means operable in the generator mode for maintaining rotational speed of the engine at a first set rotational speed until engine temperature attains a set temperature, and for outputting a signal, which increases the rotational speed of the engine to a second set rotational speed, to throttle-adjusting means after the engine temperature attains said set temperature; and
third control means for increasing the field current of the motor/generator from the minimum state after the engine temperature attains said set temperature.
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Abstract
When a motor/generator is changed over from a motor mode to a generator mode, field current is minimized. In the generator mode, idling is performed until the engine temperature attains a set temperature, after which the field current is supplied. As a result, load upon an engine is lightened immediately after the engine is started and the risk of the engine stalling is eliminated.
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Citations
20 Claims
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1. An engine generator apparatus having a motor/generator operated in a motor mode for starting an engine and in a generator mode to be driven by the engine, comprising:
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first control means for minimizing field current when a changeover is made from the motor mode to the generator mode; second control means operable in the generator mode for maintaining rotational speed of the engine at a first set rotational speed until engine temperature attains a set temperature, and for outputting a signal, which increases the rotational speed of the engine to a second set rotational speed, to throttle-adjusting means after the engine temperature attains said set temperature; and third control means for increasing the field current of the motor/generator from the minimum state after the engine temperature attains said set temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A generator/starter apparatus having a motor/generator operated in a motor mode for starting an engine and in a generator mode to be driven by the engine, comprising:
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first control means for minimizing field current when a changeover is made from the motor mode to the generator mode; second control means operable in the generator mode for outputting, to throttle adjusting means, a signal for maintaining rotational speed of the engine at a first set rotational speed until engine temperature attains a set temperature, and for increasing the rotational speed of the engine to a second set rotational speed after the engine temperature attains the set temperature; and third control means for increasing the field current of the motor/generator from the minimum state after the engine temperature attains said set temperature. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of operating a generator/starter apparatus having a motor/generator operated in a motor mode for starting an engine in a generator mode to a driven by the engine, comprising:
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a first step of effecting a changeover from the motor mode to the generator mode while minimizing field current; a second step of outputting a signal for maintaining rotational speed of the engine at a predetermined set rotational speed until engine temperature attains a set temperature, and a third step of increasing the field current of the motor/generator from the minimum state after the engine temperature attains said set temperature. - View Dependent Claims (17, 18, 19, 20)
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Specification