Patent · US Active

Hydraulic controller for an automatic transmission of a motor vehicle

US9689434B2 · kind B2 · utility

4Cited by

3References

6Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Michael Baraga · Stuttgart, DE
Markus Brandenburg · Eßlingen, DE
Henrik Kalczynski · Stuttgart, DE
Thomas Kull · Waiblingen, DE

Key dates

Filing date	Jul 17, 2012
Grant date	Jun 27, 2017
Priority date	—
Expiry date	Jul 22, 2033

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/0209
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A hydraulic controller for an automatic transmission of a motor vehicle includes at least one gear shift piston-cylinder unit having a gear shift piston for actuating a shifting element in the form of a multi-plate clutch, and a gear shift pressure chamber in which an actuating pressure may be built up by supplying operating fluid. The gear shift piston-cylinder unit has a centrifugal oil chamber that is separated from the gear shift pressure chamber by a gear shift piston. Operating fluid may be supplied to the centrifugal oil chamber via a centrifugal oil line supplied by a first supply line. The hydraulic controller has a second supply line for supplying operating fluid to the centrifugal oil line. The second supply line may be closed and opened by a centrifugal oil valve.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.