Method and system for control of two part type transmission prov

Details Method and system for control of two part type transmission prov Method and system for control of two part type transmission prov

1987-12-14

1988-12-13

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74864, B60K 4106

Patent

active

047902159

ABSTRACT:
In the control of a vehicle automatic transmission having a series connection of an overdrive gear mechanism and an underdrive gear mechanism, the overdrive gear being switched over between direct connection and overdrive both when the underdrive gear mechanism is switched to direct connection and to speed reduction, a maximum limit is set for the period over which the overdrive gear mechanism is switched to overdrive while the underdrive gear mechanism is switched to speed reduction, such a maximum period being determined according to a vehicle operational parameter such as vehicle speed, throttle opening or transmission fluid temperature.

REFERENCES:
patent: 4155277 (1979-05-01), Minami et al.
patent: 4282780 (1981-08-01), Totani et al.
patent: 4312248 (1982-01-01), Sugimoto et al.
patent: 4486838 (1984-12-01), Itoh et al.
patent: 4509124 (1985-04-01), Suzuki et al.
patent: 4560024 (1985-12-01), Noda et al.
patent: 4640393 (1987-02-01), Nishimura et al.

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