Interrelated power delivery controls – including engine control – Transmission control – Control by sensed ambient condition – pattern indicia,...
Patent
1998-08-05
1999-09-28
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Control by sensed ambient condition, pattern indicia,...
477156, F16H 6100
Patent
active
059578076
ABSTRACT:
In a control apparatus for a hydraulically operated vehicular transmission, the hydraulic pressure of a hydraulic clutch on the engaging side which is engaged at the time of speed changing (engaging pressure) is detected by a hydraulic pressure sensor. When the detected value of the engaging pressure has exceeded a predetermined value, the hydraulic pressure of a hydraulic clutch on the disengaging side to be disengaged at the time of speed changing (disengaging pressure) is reduced to a predetermined low pressure. Even if the detected value of the engaging pressure has exceeded a predetermined value YPC, the decrease in the disengaging pressure down to a predetermined low pressure QUPOFFB is delayed by a predetermined time YTMUP9 at the time of low oil temperature when the detected value of an oil temperature to be detected by an oil temperature sensor is below a predetermined value YTO. When a discrimination is made as to whether the detected value of the engaging pressure PC(N+1) has exceeded the predetermined value YPC from a predetermined time after the start of the speed changing, the time to start the discrimination may be delayed by a predetermined time at the time of low oil temperature.
REFERENCES:
patent: 5467854 (1995-11-01), Creger et al.
patent: 5743826 (1998-04-01), Usuki et al.
patent: 5803863 (1998-09-01), Hayward et al.
patent: 5857162 (1999-01-01), Vukovich et al.
Miyamoto Osahide
Saito Masahide
Suzuki Tadahiro
Suzuki Toshiyuki
Takamatsu Masaaki
Honda Giken Kogyo Kabushiki Kaisha
Ta Khoi Q.
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