| 摘要 |
A combustion engine has a compressor, an expander and a combustion chamber for burning fuel in hot air. The fuel is preferred to be a prepared block of powdered, cleaned and compressed coal. The fuel blocks may consist of cleaned powder of coal which is after cleaning pressed to conveniently sized blocks of high density. The coal fuel blocks will then have a density much higher than the density of coal powder, whereby a high amount of heat value in the coal fuel blocks can be provided for use in a convenient fuel container. A transportation means is provided to transport the respective fuel block to a cutter or powderization device for re-transformation of the solid fuel blocks into fast burning small powder-like particles. The so repowdered coal fuel burns in the combustion chamber whereby the expander is driven, which drives the compressor and supplies the power out of the engine. One of the major features of the engine is, that the available coal requires only little preparation to be burned in the engine and the high-cost liquidification of coal into gasoline-like fuel can be spared. To prevent incomplete combustion which would occur if prefect mixing of fuel with air would not be secured, means are provided to supply respective amounts of fuel at respective times to respective local places of respective amounts of hot air.
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