Pulse start method and pulse start device for an internal combustion engine

US6581559B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ferdinand Grob · Besigheim, DE
• Peter Ahner · Eppelheim, DE
• Manfred Ackermann · Elmhurst, US

Key dates

• Filing date: Jun 22, 2001
• Grant date: Jun 24, 2003
• Expiry date: Jul 18, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02N99/006
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a pulse starting method for an internal combustion engine in which, during a wind-up phase, a flywheel mass is accelerated in a rotary driven fashion and then during a coupling phase, the rotating flywheel mass is coupled to a rotatably supported shaft of the engine, preferably the crankshaft, in order transmit torque, which is distinguished by the fact that during the wind-up phase (15) and/or the coupling phase (21, 22), the rotational speed progression of the flywheel mass (3) is evaluated, that based on this evaluation, a deduction is made as to whether a successful start of the engine (1) is possible, and that if a successful start is not expected, the shaft (2) is used to bring the engine (1) into an operating position that is favorable for a subsequent second starting attempt.