192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Patent
1987-06-11
1989-11-14
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
F16H 4502
Patent
active
048800902
ABSTRACT:
A lockup control valve is provided to control the discharge from the lockup clutch during clutch engagement and a solenoid valve to supply the control pressure to the lockup control valve. The aforesaid lockup control valve has a face on which the oil supply pressure acts during lockup clutch engagement, an opposing face of equal area on which the lockup clutch discharge pressure acts, a face on which the supply pressure from the aforesaid solenoid valve acts, and an opposing face on which a constant pressure acts. The hydraulic controlling system controls the discharge pressure of the lockup clutch during lockup clutch engagement according to the control pressure from the solenoid valve. This maintains a constant relationship between the solenoid pressure and the lockup clutch capacity (pressure difference) and permits precise slip control even if the oil pressure supplied to the lockup clutch fluctuates.
REFERENCES:
patent: 3977502 (1976-08-01), Chana
patent: 4428467 (1984-01-01), Hiramatsu
patent: 4466311 (1984-08-01), Hiramatsu
patent: 4468988 (1984-09-01), Hiramatsu
patent: 4589537 (1986-05-01), Nishikawa et al.
patent: 4662488 (1987-05-01), Hiramatsu et al.
patent: 4664235 (1987-05-01), Yokoyama et al.
Aisin-Warner Kabushiki Kaisha
Bonck Rodney H.
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