Multiplexed pressure switch system for an electrically...

Details Multiplexed pressure switch system for an electrically... Multiplexed pressure switch system for an electrically...

2007-10-30

2007-10-30

Wright, Dirk (Department: 3681)

Planetary gear transmission systems or components

Input from independent power sources

Including electric motor input

Reexamination Certificate

active

11263216

ABSTRACT:
A powertrain has an electrically variable hybrid transmission having an electro-hydraulic control system, plurality of electrical power units, and a plurality of torque transmitting mechanisms selectively engageable by the electro-hydraulic control system to provide four forward speed ranges, a neutral condition, an electric low speed mode, an electrically variable low and high speed mode, and two electrical power off drive home modes. The electro-hydraulic control system includes a multiplexed pressure switch system. The multiplexed pressure switch system of the present invention allows position detection of five torque transmitting mechanism control valves through the use of only four pressure switches.

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patent: 2007/0049442 (2007-03-01), Long et al.
patent: 2007/0117671 (2007-05-01), Long et al.

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