Gear shifting device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 16, 2001
Grant Date -
N/A
app pub date -
Jun 12, 2000
filing date -
Dec 19, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a gear shifting device (118) for connecting parts of a transmission (102) rotation at different rotational speeds with at least one auxiliary unit, the gear shifting device (118) being-actuated by a control fluid. For each auxiliary unit one unit is provided in which valves (4, 5, 6, 7), shift cylinder (1), piston (2) and gear shift elements (2A) are comprised. The gear shifting device (118) is actuated by electrically controlled, pulsed 2/2-way valves (4, 5, 6, 7) and is connected to a displacement measuring device (3) whose signals can be transmitted to the 2/2-way valves (4, 5, 6, 7). The signals are used to control the 2/2-way valves (4, 5, 6, 7) according to the position of the piston (2) which is detected by the displacement measuring device (3) with respect to the shift cylinder (1).
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