Method and apparatus for reducing jolt in vehicle automatic transmissions

US4222292A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gerhard Will · Steinheim, DE
• Walter Stroh · Cleebronn, DE

Key dates

• Filing date: Jan 16, 1978
• Grant date: Sep 16, 1980
• Expiry date: Jan 16, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0488
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In order to be able to reduce the jolt produced by the transmission going into gear when the vehicle is standing still or moving only slowly, the shifting of the gear range selector lever from neutral gear into any drive range gear is caused to operate magnetic valves controlling the automatic transmission to set the transmission in the highest gear for a very brief period, enough to reduce the jolt, but not enough to interfere with the normal progress of automatic gear shifting.