Device and method for continuously variable transmission of...

Details Device and method for continuously variable transmission of... Device and method for continuously variable transmission of...

2011-07-05

2011-07-05

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

C060S484000

Reexamination Certificate

active

07971434

ABSTRACT:
A variable capacity pump and two variable capacity motors are connected in a closed circuit. First to fourth drive gears are fitted to motor shafts of the variable capacity motors via clutches. A first driven gear, which meshes with the first and third drive gears, and a second driven gear which meshes with the second and fourth drive gears are fitted to an output shaft. Equivalent capacities of the variable capacity motors are made different. Control is exerted such that the capacities are decreased to zero in order of equivalent capacities. To decrease the capacity of each variable capacity motor, the gear change ratio of the variable capacity motor the capacity of which has decreased to zero is changed to decrease the equivalent capacity and, at the same time, the capacity is increased to maximum. This increases the gear change ratio for the continuously variable transmission and controls acceleration.

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The International Preliminary Report on Patentability of the Patent Cooperation Treaty, dated Apr. 24, 2008, issued in a counterpart International Application.

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