Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1995-12-20
1997-01-28
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123697, 73 2325, 73 2332, F02D 4114, G01N 27416
Patent
active
055969755
ABSTRACT:
A method for pulse width modulating a resistance element of an oxygen sensor. The method quickly heats the resistance element of the oxygen sensor soon after start of the engine with a relatively high duty cycle yielding wide pulse widths. During a mid oxygen sensor temperature range, the method decreasing the duty cycle and thereby the pulse width modulation. And, upon the oxygen sensor reaching peak operating temperature range, the method decreases the pulse width modulated voltage signal supplied to the oxygen sensor to relatively short duty cycled pulses.
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Coatesworth Timothy A.
DeGroot Kenneth P.
Ehlers Jeffery C.
Jones Keith L.
McMackin Mark E.
Barger G. Andrew
Chrysler Corporation
Dolinar Andrew M.
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