Electronic transmission control

Details Electronic transmission control Electronic transmission control

1979-05-25

1981-09-22

Braun, Leslie

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74752B, 74752C, 74761, F16H 374, F16H 5710

Patent

active

042903220

ABSTRACT:
A control system for a multi-speed transmission having a plurality of friction devices with at least two friction devices being engaged for each speed range includes an electric circuit for controlling the supply of pressurized fluid from a source to and from the friction devices. The electric circuit includes pressure sensing means to maintain a friction device that is to be disengaged in an engaged position until the friction device that is to be engaged reaches a certain fluid pressure value to produce a power shift.

REFERENCES:
patent: 3031901 (1962-05-01), Simpson
patent: 3274858 (1966-09-01), Meyer et al.
patent: 3469472 (1969-09-01), Bislew
patent: 3754482 (1973-08-01), Sanders et al.
patent: 3796114 (1974-03-01), Taylor
patent: 3823621 (1974-07-01), Kubo et al.
patent: 4089238 (1978-05-01), Forster

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