Hydromechanical transmission for motor vehicles

US4825722A · kind A · utility

Assignee

• MAN Nutzfahrzeuge AG · DE

Inventors

• Faust Hagin · Munich, DE
• Hans Drewitz · Munich, DE
• Stefan Martini · Ulm, DE

Key dates

• Filing date: Jan 23, 1987
• Grant date: May 2, 1989
• Expiry date: Jan 23, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2186
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The hydromechanical transmission is all in all designed as a power splitting transmission having at least two hydraulic machines adapted to selectively act as pumps and motors, a control or connecting block, epicyclic gearing and various clutches, the hydraulic machines adapted to selectively act as pumps and motors forming a preassembled unit or subassembly with the control or connecting block. The subassembly, the epicyclic gearing, the clutches and any intermediate shaft required are arranged in a unitary manner in a common housing, in which the various elements are surrounded with a small clearance. the hydraulic machines adapted to selectively act as pumps and motors are arranged within the overall length of the epicyclic gearing and are axially parallel thereto.