The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2009
Filed:
Jun. 19, 2006
John S Mitchell, Farmington Hills, MI (US);
Amit K Sanyal, W. Novi, MI (US);
James L Dowbenko, Waterford, MI (US);
Ezio N Vermiglio, Tipton, MI (US);
John S Mitchell, Farmington Hills, MI (US);
Amit K Sanyal, W. Novi, MI (US);
James L Dowbenko, Waterford, MI (US);
Ezio N Vermiglio, Tipton, MI (US);
Chrysler LLC, Auburn Hills, MI (US);
Abstract
A method and associated computer-executable code for controlling an automotive powertrain featuring a manual transmission determines a current transmission output speed based at least in part on the vehicle speed achieved in response to a torque request signal; determines an effective transmission gear ratio based on the engine speed and the transmission output speed; and compares the effective transmission gear ratio to each of the predetermined transmission gear ratios. A transmission shift is deemed to be in progress when the effective transmission gear ratio is not within a predetermined tolerance of any of the predetermined transmission gear ratios. Relatively-aggressive smoothing of the torque request signal upon pedal tip-out is advantageously canceled when a shift is deemed to be in progress, thereby reducing the likelihood of unintended engine speed and/or transient flares when a declutching event follows shortly after the pedal tip-out.