Gear shift control system of hybrid vehicle

Details Gear shift control system of hybrid vehicle Gear shift control system of hybrid vehicle

2003-09-11

2008-08-26

Le, David D. (Department: 3681)

Interrelated power delivery controls, including engine control

Plural engines

Electric engine

C477S070000, C477S077000, C477S079000, C477S083000, C477S087000, C477S171000, C477S174000, C477S179000, C477S180000

Reexamination Certificate

active

07416511

ABSTRACT:
In a hybrid-drive electric vehicle, upon request of gear shifting of a transmission (2), a clutch (3) is first disconnected and the transmission (2) is set to a neutral position. The rotating electric generator4is then operated in a motor mode or a power generating mode so that a rotational speed of an input shaft of the transmission (2) reaches a region of a synchronizing rotational speed in accordance with a requested gear position. When the rotational speed of the input shaft of the transmission (2) reaches the region of the synchronizing rotational speed, the gear position of the transmission (2) is changed over from the neutral position to the requested gear position. Thus the rotation synchronizing time for the gear shifting in the transmission (2) is reduced, making it possible to perform the gear shifting for a short period of time.

REFERENCES:
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patent: 6645105 (2003-11-01), Kima
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patent: 09-089090 (1997-03-01), None
patent: 10-304513 (1998-11-01), None
patent: 2001-103603 (2001-04-01), None
patent: WO 02/36382 (2002-05-01), None

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