Gearshift unit for a transmission of a motor vehicle

US7481128B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Frank Steffens · Scharnhauser Park, DE
• Martin Teutschländer · Steinenbronn, DE

Key dates

• Filing date: Aug 1, 2006
• Grant date: Jan 27, 2009
• Expiry date: Aug 25, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19251
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a gearshift unit for a transmission of a motor vehicle, wherein a driver of the motor vehicle shift the gears of the transmission by means of a gearshift lever and the gearshift unit has a gearshift power-assist unit to enhance the shift force exerted by the driver of the vehicle, a control device is provided which detects a significant increase in a moment of inertia, in excess of a normal amount, of masses to be accelerated in the event of a gearshift in the transmission and actuates the gearshift power assist unit to assist the shift forces only when no significant increase in the moment of inertia has been detected in order to prevent high shifting forces from being generated when they might lead to damage to the transmission.