Invention Grant
US08702548B2 Hydraulic control system for an automatic transmission 有权
自动变速器液压控制系统

Hydraulic control system for an automatic transmission
Abstract:
A hydraulic control system for a transmission includes a pressure regular subsystem, a transmission range selection control subsystem, and a clutch control subsystem. The pressure regulator subsystem includes a source of pressurized hydraulic fluid for providing a flow of hydraulic fluid. The transmission range selection control subsystem includes a set of four valve assemblies actuated by a pair of solenoids. And the clutch control subsystem provides pressurized hydraulic fluid to a plurality of clutch actuators activated by a plurality of variable force solenoids through a plurality of valve assemblies. The plurality of valve assemblies of the clutch control subsystem are in fluid communication with the transmission range selection control subsystem, and the transmission range selection control subsystem employs the pressurized hydraulic fluid to engage a range selection through the clutch control subsystem.
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