Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1996-03-11
1998-12-08
Nguyen, Tan Q.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 60, 701 61, 477155, 477158, B60K 4108
Patent
active
058483705
ABSTRACT:
In order to precisely determines the time to start feedback control of line pressure during a shifting period, a shift control computer calculates an effective gear ratio Ge=Nt/Nos at the time of an shift instruction based on input shaft rotational speed Nt and detected vehicle speed Nos and then calculates a parameter F=Nos.times.Ge-Nt indicating the point to start feedback control based on the input shaft rotational speed Nt, the detected vehicle speed Nos and the effective gear ratio Ge. By comparing the calculated parameter F with a predetermined value .DELTA.Nt, hydraulic pressure at the start of shift operation is maintained if F<.DELTA.Nt and, if F.gtoreq..DELTA.Nt, feedback control is performed to cause the input shaft rotational speed Nt to vary in a predetermined manner.
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patent: 4972738 (1990-11-01), Narita
patent: 4998451 (1991-03-01), Sano
patent: 5063814 (1991-11-01), Baba et al.
patent: 5421791 (1995-06-01), Futawatari
patent: 5435796 (1995-07-01), Fujita et al.
patent: 5513104 (1996-04-01), Tsutsui et al.
Fujitsuna Masami
Kozaki Tetsuji
Nguyen Tan Q.
Nippondenso Co. Ltd.
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