Abatement of Incomplete Combustion Products Emission from Heavy Duty Diesel Engine

摘要

Operation of compression-ignition engine was analysed in respect of toxic substances emission. The tested engines (heavy duty diesel HDD - type 6C107) are used among other things as a drive of mining locomotives and city buses, so experiments were aimed at verifying if the engines meet very strict mining emission standards. Reduction of the exhaust emission from the engines was required to meet the strict limits. A method of considerable incomplete combustion products emission reduction in the whole operation range of the engine is presented. Proposed conception consists in co-acting of fuel supply cut-off technique and oxidation catalytic converter. Cutting-off fuel supply to selected cylinders of the engine (disconnection of the cylinders) is applied at low as well as mean loads and catalyst works effectively in the range of high loads. Flow resistance of the catalyst were investigated together with its thermochemical efficiency.