Starter apparatus for an internal combustion engine

US5533415A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Manfred Ackermann · Elmhurst, US
• Ngoc-Thach Nguyen · Bornsteiner Straße, DE
• Siegfried Schustek · Ditzingen, DE
• Quang N. Tran · Marseilles, FR

Key dates

• Filing date: Jan 10, 1994
• Grant date: Jul 9, 1996
• Expiry date: Jan 10, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/137
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The starter apparatus for an internal combustion engine includes a starter motor; an axially shiftable starting gear engageable with a ring gear of the internal combustion engine; a drive train for transferring rotary motion of a drive shaft of the starter motor to the starting gear, the drive train including a plurality of parts from the starting gear to the drive shaft; a free wheel clutch coupled with the drive shaft of the starter motor; and a shock absorber spring device for damping torque shocks between the starting gear and the drive shaft occurring on operation of the starter and located in the drive train between the starting gear and the drive shaft of the starter motor. According to the invention the shock absorber spring device is prestressed to provide a torque acting in a drive rotation direction equal to from 15 to 50% of the stall torque of the starter motor delivered to the starting gear and a ratio of the torsional rigidity of another drive train equal to the above drive train without the shock absorber spring device and at the stall torque to the torsional rigidity of the shock absorber spring device effective at the starting gear must be at least 4.