Method and apparatus for automatic transmission cruise control

Details Method and apparatus for automatic transmission cruise control Method and apparatus for automatic transmission cruise control

1984-10-15

1987-04-21

Mitchell, David M.

Motor vehicles

With means responsive to speed of vehicle for maintaining...

Including fluid pressure actuated servomechanism

74868, 180178, B60K 3100

Patent

active

046589295

ABSTRACT:
In order to prevent hunting between a selected gear ratio (e.g. overdrive) and the next lower one when a vehicle ascends a slope or incline under "cruise control", the degree to which which the cruise control arrangement (viz., the automatic vehicle speed control device (ASCD)) can open the throttle valve is limited to a value at which the transmission control circuit (e.g. hydraulic) will induce a downshaft. Upon a downshift being necessary to maintain vehicle speed, upshift is inhibited either for a predetermined period of time or until the load which necessitated the downshaft disappears.

REFERENCES:
patent: 3713351 (1973-01-01), Sakakibara et al.
patent: 3732755 (1973-05-01), Beig et al.
patent: 4421192 (1983-12-01), Ito et al.
patent: 4463822 (1984-08-01), Tanigawa et al.
patent: 4506752 (1985-03-01), Hara et al.
patent: 4560024 (1985-12-01), Noda et al.
patent: 4563918 (1986-01-01), Sugano

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