Internal combustion engine starter disconnect system

US4198945A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Manfred Eyermann · Mühlacker, DE
• Wolfgang Pfeifer · Kerzenheim, DE

Key dates

• Filing date: Dec 29, 1977
• Grant date: Apr 22, 1980
• Expiry date: Dec 29, 1997

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02N2200/063
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

When the starter motor which can be coupled to an internal combustion engine, typically an automotive engine, has accomplished its function and the automotive engine started, it is disconnected by a switch which is controlled from a sensing circuit connected to the energization circuit of the starter and responsive to a-c components. The system operates on the basis that, before the engine has started, the sequential compression and decompression in the cylinders of the internal combustion engine will result in alternating components which are superimposed or modulated on the energy flow to the starter motor. When the internal combustion (IC) engine has started, the undulations and variations in energy supplied to the motor will terminate. The system is sensitive to such termination and disconnects the starter motor at that time.