Coolant Pump Throttling - A Simple Method to Improve the Control Over SI Engine Cooling System

Paper #:
  • 961813

Published:
  • 1996-08-01
Citation:
Yang, J., "Coolant Pump Throttling - A Simple Method to Improve the Control Over SI Engine Cooling System," SAE Technical Paper 961813, 1996, https://doi.org/10.4271/961813.
Author(s):
Pages:
7
Abstract:
Pump throttling at light engine loads can reduce the heat-transfer coefficients in both the water jacket and the radiator, reducing HC emissions and friction/heat-transfer losses. Pump throttling can also accelerates engine warm-up. Pump driving power under pump throttling is predicted using measured flow parameters of a production-engine cooling system. The lower pump driving power due to pump throttling results in a 0.5% decrease in predicted BSFC. Engine BSFC can decrease by more than 0.5% due to reduced friction and heat-transfer losses as a result of the increased engine temperature.
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