Effects of High-Boost Turbocharging on Combustion Characteristics and Improving Its Low Engine Speed Torque

Paper #:
  • 920046

Published:
  • 1992-02-01
Citation:
Sugihara, H., Aoyagi, Y., Endo, S., Otani, T. et al., "Effects of High-Boost Turbocharging on Combustion Characteristics and Improving Its Low Engine Speed Torque," SAE Technical Paper 920046, 1992, https://doi.org/10.4271/920046.
Pages:
10
Abstract:
This paper describes the experimental studies of turbocharged and intercooled diesel engines with particular emphasis on combustion characteristics following increase of boost pressure. Through these studies, it has become possible to determine the optimum air quantity for minimizing fuel consumption at each engine speed range under the restrictive conditions of NOx emission, exhaust smoke and maximum cylinder pressure.Discussed also is the lack of air quantity in the low engine speed range of high-boost turbocharged diesel engines. Various turbocharging systems to improve air quantity in this speed range are introduced herein. Practically the engine performance of conventional turbocharging, waste gate control turbocharging and variable geometry turbocharging are discussed from the viewpoint of torque recovery in the low engine speed range.
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