SYSTEM AND METHOD FOR CONTROLLING PUMP PERFORMANCE IN A TRANSMISSION

摘要

A hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.

主权项

1. A hydraulic system of an automatic transmission, comprising:
a controller; a variable displacement pump adapted to be driven by a torque-generating mechanism, the pump having an inlet and an outlet, where the pump is configured to generate fluid flow and pressure throughout the system; a main circuit fluidly coupled to the pump; a main regulator valve disposed in the main circuit, the main regulator valve being configured to move between at least a regulated position and an unregulated position, where the regulated position corresponds to a regulated pressure in the main circuit; a pressure switch fluidly coupled to the main regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller; a solenoid disposed in electrical communication with the controller, the solenoid controllably coupled to the pump to alter the displacement of the pump; and a temperature sensor disposed in electrical communication with the controller, the temperature sensor adapted to detect a temperature of the fluid in the transmission.