Method for starting a combustion engine having a starter apparatus

US10774765B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Klaus Geyer · Pocking, DE
• Martin Kiesner · Waiblingen, DE
• Joerg Praeger · Winnenden, DE
• Steffen Bantle · Bad Marienberg, DE
• David Fallscheer · Echterdingen, DE
• Erik Ames · Waiblingen, DE

Key dates

• Filing date: Jul 5, 2018
• Grant date: Sep 15, 2020
• Expiry date: Jul 5, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method is for starting a combustion engine having a pull-rope starter. A fuel/air mixture is fed to the engine via an intake channel. The mixture is ignited by a spark plug. The combustion drives the piston downward and drives a crankshaft rotationally. The fuel system has a fuel channel opening into the intake channel. An electric fuel valve is open in its currentless state and closes a fuel channel only when an operating voltage is applied. An electronic control unit actuates the fuel valve and triggers an ignition spark and is utilized by a generator to supply energy to the control unit, the fuel valve and the ignition device. To prevent excessive enriching of the fuel/air mixture during starting, the energy, which is generated at the beginning of the rotation of the crankshaft, is used to first close the fuel valve before the control unit triggers an ignition spark.