Matching of High-Output Turbocharged Engines for Maximum Torque Backup and Emission Reduction Based on the Use of Variable Geometry Compressors and Turbines 740738
Turbine performance programs based on relatively simple one-dimensional considerations of great value when investigating the effect of variable nozzle angle or turbocharger matching, and compressor programs based on a combination of one-dimensional flow formulations for rotor and diffuser are discussed. A complete survey has been carried out and the results show that by use of optimized turbine nozzle angle and compressor prewhirl schedules, a fueling schedule appropriate to high torque backup at just over half engine speed can be employed without exceeding the operating limits of the engine with respect to air/fuel ratio (A/F), exhaust temperature, or maximum cylinder pressure.
Citation: Wallace, F. and Sivakuraman, K., "Matching of High-Output Turbocharged Engines for Maximum Torque Backup and Emission Reduction Based on the Use of Variable Geometry Compressors and Turbines," SAE Technical Paper 740738, 1974, https://doi.org/10.4271/740738. Download Citation
F. J. Wallace, K. Sivakuraman
School of Engineering, University of Bath, England
1974 SAE International Off-Highway and Powerplant Congress and Exposition