Coal dust etc. combustion engine - has high-compression air cylinder, separate combustion chamber with ash removal, and expansion cylinder

摘要

The combustion engine uses coal dust or other solid-based combustible material as fuel. It comprises a cylinder with a very small clearance volume to compress air, admitted via an air passes to a combustion chamber with fuel inlet. This chamber contains various driven filters and catalysts to remove incombustible residues, and the clean combustion gas passes to a second cylinder where expansion produces the power output.