Controller for varying gear ratios in transmission system

摘要

A controller is provided for varying gear ratios in a transmission system including at least one planetary gear train disposed within a housing. The controller includes a ratio control gear set, a ratio control pump, and a relief valve. The ratio control gear set includes a sun gear, a planet carrier, and a ring gear. The planet carrier is configured to rotatably connect to an output shaft of an engine. The ring gear is configured to mesh with a sun gear of the planetary gear train. The ratio control pump includes a body configured to rigidly connect to the housing, and a rotor rigidly coupled to the sun gear of the ratio control gear set. The rotor is configured to co-act with the body to pump fluid. The relief valve is configured to restrict fluid egress from the ratio control pump.

主权项

1. A controller for varying gear ratios in a transmission system coupled to an engine and including at least one planetary gear train disposed within a housing, the controller comprising:
a ratio control gear set including:
a sun gear;a planet carrier including one or more planet gears meshed with the sun gear, the planet carrier configured to rotatably connect to an output shaft of the engine; anda ring gear meshed with the planet gears and configured to mesh with a sun gear of the planetary gear train; and a ratio control pump including:
a body configured to rigidly connect to the housing; anda rotor rigidly coupled to the sun gear of the ratio control gear set and configured to co-act with the body to pump fluid; anda relief valve connected to the ratio control pump and configured to restrict fluid egress from the ratio control pump,wherein the rotor is configured to slip with respect to the body while the relief valve selectively restricts fluid egress from the pump.