Fuel Injection Equipment for Heavy Duty Diesel Engines for U. S. 1991/1994 Emission Limits 890851
The particulate emissions can be reduced by increasing injection pressure. The NOx-emission can be lowered to the required amount with a retarded injection-begin. These measures raise fuel consumption by approximately 8-10 %. To avoid blue smoke from the cold engine, it is advantageous that the fuel injection is advanced during the warm-up period. These statements apply for injection systems with unit injectors as well as for pump-line-nozzle-systems.
In this paper, the pump-line-nozzle-system will be described. With this system, injection pressures of 1200 to 1400 bar at the injection nozzle are reached. The injection-begin can be changed with a control-sleeve in-line pump. The injection-begin and fuel quantity can be flexibly and accurately adjusted by means of an electronic governor.
Citation: Stumpp, G., Polach, W., Muller, N., and Warga, J., "Fuel Injection Equipment for Heavy Duty Diesel Engines for U. S. 1991/1994 Emission Limits," SAE Technical Paper 890851, 1989, https://doi.org/10.4271/890851. Download Citation
Gerhard Stumpp, Wilhelm Polach, N. Muller, J. Warga
Robert Bosch GmbH
SAE International Congress and Exposition
SAE Transactions Journal of Engines-V98-3