Hydraulic control arrangement for an automatic transmission

US8985294B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Joerg Schindler · Bietigheim-Bissingen, DE
• Michael Baraga · Stuttgart, DE
• Markus Brandenburg · Eßlingen, DE
• Henrik Kalczynski · Stuttgart, DE
• Thomas Kull · Waiblingen, DE

Key dates

• Filing date: Feb 3, 2013
• Grant date: Mar 24, 2015
• Expiry date: Jul 22, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0209
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a hydraulic control arrangement for an automatic transmission of a motor vehicle having a parking lock activation system wherein operating fluid is supplied via a parking lock slide valve to a first parking lock pressure chamber for moving a parking lock-up piston in one direction into a locking position or moving the parking lock piston in an opposite direction, whereby operating fluid is released from the first parking lock pressure chamber via a discharge slide valve by way of which the first parking brake pressure chamber is connected to a tank for releasing the parking lock-up.