This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Application of Common Rail Fuel Injection System to a Heavy Duty Diesel Engine
Annotation ability available
Sector:
Language:
English
Abstract
In the diesel engine industry, the growing trends are toward wider use of electronically controlled high pressure fuel injection equipment to provide better engine performance, while conforming to the stringent exhaust emission standards.
Although there have been some recent announcements of a diesel engine that applies an electronically controlled common rail type fuel injection system, there is little literature published about any attempt to reduce both exhaust emissions and noise and to improve engine performance by varying injection pressure and injection timing independently and introducing pilot injection in combination.
This paper describes the details of a study made on the parameters associated with injection timing, injection pressure and pilot injection and the procedures for their optimization, with an electronically controlled common rail type fuel injection system installed in an in-line 6-cylinder 6.9 liter turbocharged and intercooled DI diesel engine.
The study made it clear that not only high pressure injection, but also pilot injection are effective for the reduction of smoke at high load, particularly in low speed ranges. It also became clear that pilot injection was useful for reduction of NOx and HC at low load and also for reduction of noise in all engine operating ranges.
Based on the results of the study, the parameters of injection pressure, injection timing, pilot injection quantity and pilot injection timing were optimized in all engine operating ranges. Consequently, the torque at low speeds was increased and the particulate was cut by half in comparison with the conventional engine, while reducing smoke and noise, without increasing exhaust emissions. Moreover, pilot injection was found to be very effective for improvement of engine startability and reduction of white smoke at low temperatures.
Recommended Content
Authors
Topic
Citation
Yamaki, Y., Mori, K., Kamikubo, H., Kohketsu, S. et al., "Application of Common Rail Fuel Injection System to a Heavy Duty Diesel Engine," SAE Technical Paper 942294, 1994, https://doi.org/10.4271/942294.Also In
Heavy Duty Vehicles and Alternative Fuels: Choices in Future Transportation
Number: SP-1060; Published: 1994-11-01
Number: SP-1060; Published: 1994-11-01
References
- Racine R. et al “Application of a High Flexible Electronic Injection System to a Heavy Duty Diesel Engine” SAE 910184
- Shimoda M. et al “Application of Heavy Duty Diesel Engine to Future Emission Standards” SAE 910482
- Needham J.R. et al “Competitive Fuel Economy and Low Emissions Achieved Through Flexible Injection Control” SAE 931020
- Miyaki M. et al “Development of New Electronically Controlled Fuel Injection System ECD-U2 for Diesel Engines” SAE 910252
- Cuenca R.M. “Evolution of Diesel Fuel Injection Equipment - The Last 20 Years” SAE 933015
- Matsura Y. et al “Effects of Various Methods for Improving Vehicle Startability and Transient Response of Turbocharged Diesel Trucks” SAE 920044
- Shimada T. et al “The Effect of Fuel Injection Pressure on Diesel Engine Performance” SAE 891919
- Shundoh S. et al “NOx Reduction from Diesel Combustion Using Pilot Injection with High Pressure Fuel Injection” SAE 920461
- Ishiwata H. et al “A Feasibility Study of Pilot Injection in TICS” SAE 940195
- Nakakita K. et al “Optimization of Pilot Injection Pattern and Its Effect on Diesel Combustion with High-Pressure Injection” JSME No.92-0962
- Kohketsu S. et al “Technology for Low Emission, Combustion Noise and fuel Consumption on Diesel Engine” SAE 940672
- Osuka I. et al “Benefits of New Fuel Injection System Technology on Cold Startability of Diesel Engines” SAE 940586