Drive assembly with a prime mover and a flywheel

US4471668A · kind A · utility

Assignee

• Voith Getriebe KG · DE

Inventor

• Ernst Elsner · Herbrechtingen, DE

Key dates

• Filing date: Feb 23, 1982
• Grant date: Sep 18, 1984
• Expiry date: Feb 23, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/62
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A drive assembly for a motor vehicle, especially for city buses, consists of a continuously variable transmission (G) and four clutches (31, 32, 33 and 34). The first clutch (31) connects a prime mover (M) to a flywheel (S), the second (32) the flywheel (S) to intermediate gearing (Z), the third (33) the prime mover (M) to a driven shaft (30), and the fourth (34) the intermediate gearing (Z) to the driven shaft (30). To keep the variable transmission (G) as simple as possible it has a differential (D) with three transmission components (21, 22, and 23) and is preferably in the form of a planetary-gear set. The variable transmission (G) is composed of two, preferably hydrostatic units (G.sub.1 and G.sub.2). The internal geared wheel (23) of the planetary-gear set (D) is preferably connected to the prime mover, its sun wheel (21) with one hydrostatic unit (G.sub.1), and its ring gear (22) with both the intermediate gearing (Z) and the other hydrostatic unit (G.sub.2).