Hydraulic control system for an automatic transmission

摘要

A hydraulic control system for a transmission includes a source of pressurized hydraulic fluid that communicates with an electronic transmission range selection (ETRS) subsystem or manual valve and a clutch actuation subsystem.

主权项

1. A hydraulic control system for a ten-speed automatic transmission, the hydraulic control system comprising:
a pressure regulator subsystem with a source of pressurized hydraulic fluid for providing a flow of hydraulic fluid; an electronic transmission range selection (ETRS) control subsystem including a set of three valve assemblies, the ETRS control subsystem further including a Park mechanism that communicates with an out-of-Park solenoid and a Park servo valve; and a clutch actuation control subsystem that provides pressurized hydraulic fluid to a plurality of clutch actuators through a plurality of clutch valve assemblies, wherein the ETRS control subsystem connects the pressure regulator subsystem with the clutch control subsystem and wherein the ETRS control subsystem converts electronic input for a requested range selection into hydraulic and mechanical commands.