Electrohydraulic transmission controller, transmission device, and a motor vehicle drive train

US8033106B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Georg Gierer · Kreßbronn, DE
• Thilo Schmidt · Meckenbeuren, DE

Key dates

• Filing date: Oct 24, 2008
• Grant date: Oct 11, 2011
• Expiry date: Jun 5, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7762
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electrohydraulic transmission controller (7), a transmission device with an electrohydraulic transmission controller and a vehicle drive train that features an electrohydraulic transmission controller are disclosed. The electrohydraulic transmission controller is constructed with a plurality of electrically actuatable pressure control valves (9 to 16), as well as with a plurality of valve arrangements (17 to 34) that can be acted on in each case by an hydraulic precontrol pressure depending upon the actuation of the pressure valves, by way of which valve arrangements switching elements (A to E) of a transmission device can be acted on in each case with a control pressure to produce a required operating state of the transmission device. An additional pressure control valve (9) is provided to adjust a precontrol pressure (p_VS—9) of an additional valve arrangement (35), whereby downstream of the additional valve arrangement, the sub-assembly (6) of a vehicle drive train can be acted on by a cooling oil volume flow subject to the precontrol pressure of the additional valve arrangement and an operating state of the additional valve arrangement (35) corresponding to it.