Control arrangement for an automatic, electrohydraulically controlled transmission

US6189396A · kind A · utility

Assignee

• AUDI AG · DE

Inventors

• Karl Barnreiter · Hitzhofen, DE
• Hans-Peter Fleischmann · Stammham, DE
• Johann Märkl · Nassenfels, DE
• Hans-Jurgen Rudolph · Neubukow, DE
• Michael Genzel · Roßtal, DE
• Roger Pohlmann · Braunschweig, DE
• Armin Gottschaller · Dresden, DE
• Thomas Schmid · Zürich, CH
• Werner Flierl · Sulzbach-Rosenberg, DE

Key dates

• Filing date: Jul 20, 1998
• Grant date: Feb 20, 2001
• Expiry date: Jul 20, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19251
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention concerns a control arrangement for an automatic electrohydraulically controlled transmission. In order to reduce expenditure on parts and assembly, the hydraulic control system and electronic control system are mounted directly adjacent each other and plug-in connections are provided between the solenoid valves of the hydraulic control system and the electronic control system. The hydraulic control system (20) substantially comprises two duct panels (28,30) in which control ducts, piston slides and solenoid valves (not shown) are disposed for controlling the conical plates and couplings of the transmission. The pressurized hydraulic fluid is fed directly into these duct panels from the pump (29). The electronic control system (22) has a single central connection (36) which is secured in the transmission housing cover (42) by an annular seal. Rotational speed sensors for the transmission shafts and temperature and pressure sensors are integrated into the control unit.