Drive system and method for automotive vehicles, especially floor vehicles such as forklift trucks

US4461958A · kind A · utility

Assignee

• STILL GmbH · DE

Inventors

• Erich Krohling · Reinbek, DE
• Manfred Kremer · Hamburg, DE

Key dates

• Filing date: Sep 2, 1981
• Grant date: Jul 24, 1984
• Expiry date: Sep 2, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/72
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A drive system for an automotive vehicle, especially an industrial floor vehicle such as a forklift truck, comprises an internal combustion engine, preferably a diesel engine, whose speed-controlling element (e.g. fuel-injection pump) in connected to a speed-setting member (e.g. a drive pedal) and propels an externally energized direct-current generator which, in turn, is connected to an externally energized direct-current motor driving the load, e.g. at least one wheel of the vehicle. According to the invention, the speed-controlling element of the internal combustion engine is provided with a speed-setting signal generator, the output shaft of the internal combustion engine with an engine shaft-speed signal generator and the output shaft of the direct current motor with a motor shaft-speed signal generator. The signals from the speed-setting signal generator and from the motor speed signal generator are fed to a speed controller whose output is delivered to a power controller while the signals from the speed-setting signal generator and form the engine shaft speed signal generator are delivered to a comparator hose output is also supplied to the power controller which controls th…