Hydraulic control device for an automatic transmission

US10161509B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Stefan Beck · Eriskirch, DE
• Christian Sibla · Friedrichshafen, DE
• Christoph Margraf · Markdorf, DE
• Peter Ziemer · Tettnang, DE

Key dates

• Filing date: Sep 17, 2014
• Grant date: Dec 25, 2018
• Expiry date: Sep 17, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0279
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic control device for controlling multiple torque-transferring shift elements of an automatic transmission, where each of the shift elements features at least one hydraulic actuator, which includes one actuating pressure chamber, at least one stop valve and at least one hydraulic shift device with multiple pressure adjusting devices connected to the different shift elements. Thereby, the stop valve is configured and arranged in such a manner that the actuators of at least two shift elements are hydraulically connectable to the pressure adjusting devices through a common stop valve. In a first shifting position, all actuating pressure chambers of the at least two shift elements are tightly sealed by the stop valve. In a second shifting position, all actuating pressure chambers of the at least two shift elements are connected through the stop valve to the pressure adjusting device allocated to the respective shift element.