Wheel-end and center axle disconnects for an electric or HEV
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United States of America Patent
Stats
-
Sep 21, 2004
Grant Date -
Jul 24, 2003
app pub date -
Jan 18, 2002
filing date -
Jan 18, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
This invention is a method and system to disconnect drive wheels from the powertrain of any electric powered vehicle. A vehicle controller monitors input from, for example, an inertia switch and electric motor generator conditions and can disconnect the output shaft from the drive wheels in predetermined vehicle conditions such as during a rear-end collision, or abnormal electric motor conditions such as over-torque, over-temperature, or over-current. The invention can be configured to monitor and respond to driver demand for four-wheel drive, two-wheel drive, and neutral tow. The disconnect device can comprise a disconnect actuator and joint attached to an axle disconnect. The axle disconnect can be electric or vacuum powered and positioned as a center disconnect or a wheel-end disconnect. The invention can be configured for conventional or limited slip axles.
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