Interrelated power delivery controls – including engine control – Transmission control – Including fluid drive
Patent
1996-02-29
1998-01-06
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Including fluid drive
477 64, 477110, 477174, F16H 5938, B60K 4122
Patent
active
057048711
ABSTRACT:
A vehicle automatic transmission control system in which the clutch is controlled in a slipping state if a torque converter is locked up when the gear shift command is not output. When the engine speed fluctuates, the fluctuations pass through the transmission and wheels and act on the ground to produce a reaction which passes back through the wheels and vehicle body and acts on the passengers as surging. In the prior art, this surging is prevented by slip-controlling the lockup clutch. This complicates the hydraulic control circuit. In the subject control, therefore, the clutch is slip-controlled even when no gearshift is in progress so as to absorb surging by slipping the clutch, not by the torque converter as in the prior art. As a result, it suffices to control the lockup clutch L of the torque converter between only two positions, one for complete lockup and one for complete release, rendering the structure of the hydraulic control circuit simple.
REFERENCES:
patent: 4984484 (1991-01-01), Fujiwara et al.
patent: 5403250 (1995-04-01), Juergens
patent: 5577980 (1996-11-01), Vukovich et al.
Furukawa Hideo
Ohashi Tatsuyuki
Honda Giken Kogyo Kabushiki Kaisha
Ta Khoi Q.
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