FOUR-STROKE DIESEL ENGINE WITH CATALYTIC CONVERTER

摘要

Four-stroke diesel engine with unit injectors (6) and a catalytic converter (24) in the engine exhaust system (23) for catalytic reduction of nitrogen oxides in the exhaust. The unit injectors have pump pistons, each driven by an individual cam element (12, 13) with a cam curve (B, C), which has a first cam ridge (20) effecting injection of fuel during the ordinary injection phase of the engine, and a second cam ridge (21, 22) which achieves so-called post-injection in the engine combustion chamber during the exhaust phase of the engine, for supplying vaporized fuel to the catalytic converter.