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. 06, 2004
Filed:
Apr. 24, 2002
Eijiro Shimabukuro, Wako, JP;
Naohisa Morishita, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A hybrid vehicle comprises a torque converter TC, which is connected to an engine E, a gear-type speed change mechanism, shift clutches and , a drive power transmission system, which transmits output rotation to drive wheels , and a second motor generator , which can drive the drive wheels . A control system for this hybrid vehicle comprises a throttle controller TH and a shift control valve CV. When the drive mode is switched from motor-driven mode to engine-driven mode, the control system sets a target speed ratio and calculates a vehicle-speed corresponding rotational speed that would arise at the output shaft of the engine if the current rotation of the drive wheels were transmitted with this target speed ratio and through the torque converter with a speed ratio of 1.0. Then, the control system controls the rotation of the engine to bring the output rotational speed of the engine closer to the vehicle-speed corresponding rotational speed. If the deviation of the output rotational speed of the engine from the vehicle-speed corresponding rotational speed becomes and remains equal to or smaller than a predetermined value for a predetermined time period, then the control system engages the frictionally engaging means to establish the target speed ratio.