Effect of Cycle-to-Cycle Variation in the Injection Pressure in a Common Rail Diesel Injection System on Engine Performance 2003-01-0699
The performance of the Common Rail diesel injection system (CRS) is investigated experimentally in a single cylinder engine and a test rig to determine the cycle-to-cycle variation in the injection pressure and its effects on the needle opening and rate of fuel delivery. The engine used is a single cylinder, simulated-turbocharged diesel engine. Data for the different injection and performance parameters are collected under steady state conditions for 35 consecutive cycles. Furthermore, a mathematical model has been developed to calculate the instantaneous fuel delivery rate at various injection pressures. The experimental results supported with the model computations indicated the presence of cycle-to-cycle variations in the fuel injection pressure and needle lift. The variations in the peak-cylinder gas pressure, rate of heat release, cylinder gas temperature and IMEP are correlated with the variation in the injection rate. The effect of these variations on NOx emission and soot are also discussed in this paper.
Citation: Zhong, L., Singh, I., Han, J., Lai, M. et al., "Effect of Cycle-to-Cycle Variation in the Injection Pressure in a Common Rail Diesel Injection System on Engine Performance," SAE Technical Paper 2003-01-0699, 2003, https://doi.org/10.4271/2003-01-0699. Download Citation
L. Zhong, I. P. Singh, J. Han, Ming-Chia Lai, N. A. Henein, Walter Bryzik
Wayne State University, U.S. Army Tank Automotive Command
SAE 2003 World Congress & Exhibition
New Diesel Engines & Fuel Injection-SP-1739