Apparatus for controlling rotational speed of Stirling engine
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United States of America Patent
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Mar 17, 1992
Grant Date -
N/A
app pub date -
Mar 26, 1991
filing date -
Mar 31, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed an apparatus for controlling the rotational speed of a Stirling engine in such a way that effective use is made of dump power produced when the speed of the engine is maintained constant. The apparatus comprises a tank in which a working medium is stored, a first valve mechanism, a second valve mechanism, a dynamo for producing alternating current during operation of the engine, a load to which the alternating current is applied, an accessary receiving the alternating current via a distributor, and a control unit. When a change in the electric power consumed by the load is detected, the control unit actuates the first or second valve mechanism to force the working medium out of the tank into the working space in the engine or vice versa such that the speed of the engine corresponds to the change in the electric power. When the engine speed increases, the resulting increase in the electric power is consumed for the accessary such as a cooling fan or a battery that powers the starter.
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