Hydromechanical transmission electronic control system for high speed vehicles
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United States of America Patent
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-
Feb 8, 2005
Grant Date -
Jan 22, 2004
app pub date -
May 12, 2003
filing date -
Jul 18, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electronic transmission control system that can achieve a transmission ratio based on the operator inputs and the current vehicle operating conditions. The transmission constantly connects the engine to the load, and the transmission ratio is only varied by a change in command from the present invention. The transmission's mechanical function is solely to vary the ratio between its input and output. In using the present invention, an operator must select an operating mode, either automatic or manual, using a two-position switch. While in the automatic mode, the present invention determines the vehicle speed by considering the position of the throttle and the operator's use of brakes. In the manual mode, the present invention further considers the operator's selection of a gear condition.
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