Clean Diesels - Future Development Trends for Fuel Injection and Exhaust Gas Treatment Systems

Diesel passenger cars are extremely successful due to their high torque at low speeds (fun to drive) and lower fuel consumption. However, reduced emission standards, especially NO_x, will challenge the Diesel engine significantly. In order to achieve the stringent emission targets, high sophisticated fuel injection systems and Exhaust Gas Treatment (EGT) are essential besides further development of the combustion process. Injection pressures of 2000 bar and beyond with highly dynamic and flexible multiple injections are required to achieve low emissions. For further de-noxation selective catalytic reduction catalysts or lean NO_x traps will be required. Most of these new features would not be possible without precise electronic control.