Method for regulating the output of a stirling-type hot gas engine and device for the same
AssigneeForenade Fabriksverken
InventorPer Henrik Gosta Nystrom
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Abstract
Commercial exploitation of the closed-cycle Stirling engine has been delayed because of inherent difficulties in controlling the engine output instantaneously. The disclosed invention presents a method and a device for intermittent power control of a Stirling engine by alternately connecting and disconnecting a separate dead space to the engine gas circuit. The control cycle includes a multiple of engine revolutions and is independent of the engine speed.
Claims10
A method for controlling the power of a hot gas engine of the Stirling type having a dead space separated from the engine internal gas circuit, comprising:
- periodically connecting the dead space to the gas circuit and disconnecting the dead space from the gas circuit for a combined period of time comprising one control cycle of constant duration independent of engine speed, whereby gas circuit pressure amplitude respectively decreases and increases.
A device for controlling the power of a hot gas engine of the Stirling type having dead space separated from the engine internal gas circuit, comprising:
- a. electrically controlled valve means adapted to connect the dead space to the gas circuit;
- and
- b. a pulse time modulator having an output terminal connected to said electrically controlled valve means, said modulator having a constant duration cycle independent of the engine, a portion of which cycle is regulable in duration and which portion energizes said valve means.
Dependencies are inferred from the claim text.