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:
Jan. 27, 2004
Filed:
Apr. 05, 2002
Takahiro Sekii, Gothenburg, SE;
Yoshihisa Yamamoto, Anjo, JP;
Masamichi Unoki, Anjo, JP;
Tsutomu Mizutani, Ann Arbor, MI (US);
Aisin AW Co., Ltd., , JP;
Abstract
During an upshift in a full-throttle state, the output of a shift command (Us ) from a control unit is followed by a delay in initiation of an actual shift, due to a delay in increase in oil pressure, a rise in the clutch torque load, etc. A shift initiation (Uj) is determined by comparing the input rotational speed (Ni) with the product of multiplication of the output rotational speed (vehicle speed) (No) by the pre-shift gear ratio. The shift point (Mp ) is learning-corrected based on the shift initiation-time engine rotational speed (NeI). Therefore, false learning is avoided even if the engine races during a shift.