Starting device for an internal combustion engine and method for starting the internal combustion engine

US6240890A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Jorg Abthoff · Plüderhausen, DE
• Roland Kemmler · Stuttgart, DE
• Klaus Magg · Stuttgart, DE
• Martin Matt · Weingarten, DE
• Dittmar Wieland · Oppenweiler, DE

Key dates

• Filing date: Nov 4, 1999
• Grant date: Jun 5, 2001
• Expiry date: Nov 4, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02N2300/102
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In known starting devices, an individual starter is provided which accelerates the internal combustion engine to only a relatively low rotational speed at which an initial injection with subsequent combustion takes place. During a cold start of the internal combustion engine, it is therefore absolutely necessary to provide a relatively rich fuel/air mixture for the initial injection. However, this results in a situation in which, during this phase, relatively high exhaust gas emissions, in particular of hydrocarbons, are produced, which cannot be controlled by a catalytic converter which is not yet at its operating temperature. In order to reduce the exhaust gas emissions, a starting device for an internal combustion engine is proposed which has two starters for starting the internal combustion engine, a first starter being activated at the beginning of the starting process and being deactivated after a specific rotational speed of the internal combustion engine has been reached, a second starter (2) being activated. The second starter subsequently drives the internal combustion engine further to a specific setpoint rotational speed, after which, when the setpoint rotational speed …