Application of Glow Plugs for Combustion Sensing in a Diesel Engine

Paper #:
  • 911878

Published:
  • 1991-09-01
Citation:
Kong, H., "Application of Glow Plugs for Combustion Sensing in a Diesel Engine," SAE Technical Paper 911878, 1991, https://doi.org/10.4271/911878.
Author(s):
Pages:
8
Abstract:
On-board diagnostics of a diesel engine are very important in keeping emissions low and in maintaining the engine properly. Combustion sensing is the most important objective in engine diagnostics. SwRI-developed Temperature Controller for Glow Plugs (TCGP) can be used to detect the temperature in each combustion chamber of a diesel engine if it uses glow plugs. If one or more of the cylinders show lower temperature than the predetermined value at a given load/speed, the cylinder(s) is experiencing misfiring, improper fuel metering or other problems. The heating element in a glow plug can be used as a temperature sensor while heating the glow plug by a time-sharing method. The heating power can also be turned off completely so that the TCGP works only as a temperature measuring device. Thus, the TCGP or even a simpler glow plug sensing circuitry alone will work with the on-board diagnostics module in a diesel engine.
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