Torque converter clutch control system and post oxygen sensor performance diagnostic system
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United States of America Patent
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Feb 1, 2011
Issued Date -
N/A
app pub date -
Feb 28, 2008
filing date -
Nov 1, 2007
priority date (Note) -
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Abstract
A system comprises a post oxygen performance diagnostic (POPD) module that performs a POPD of a post oxygen sensor, wherein the POPD includes a deceleration fuel cutoff (DFCO) portion. A torque converter control module adjusts operation of a torque converter clutch (TCC). The POPD module and the torque converter control module operate the TCC to control engine speed above a predetermined engine speed during the DFCO portion of the POPD. A method comprises performing a POPD of a post oxygen sensor, wherein the POPD includes a deceleration fuel cutoff (DFCO) portion and adjusting operation of a torque converter clutch (TCC) to control engine speed above a predetermined engine speed during the DFCO portion of the POPD.
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