Method and device for automatic or semiautomatic selection of a better starting gear in a vehicle

US8401750B2 · kind B2 · utility

Assignee

• VOLVO LASTVAGNAR AB · SE

Inventor

• Lars Karlsson · Täby, SE

Key dates

• Filing date: Feb 28, 2008
• Grant date: Mar 19, 2013
• Expiry date: Jan 22, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/023
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Method and a device for automatic selection of a better starting gear in a vehicle, including the steps of engaging a first starting gear, on driver demand controlling propulsion torque as to attempt to achieve a first take off, if the first starting gear is too high interrupting the first take off and automatically braking the vehicle, engaging a second adapted starting gear which is a lower gear compared to the first starting gear, controlling propulsion torque as to attempt to achieve a second vehicle take off, and if the second vehicle take off attempt results in a transmitting of torque to driven wheels of the vehicle being enough as to perform a take off then stop braking the vehicle. An incorrectly selected starting gear can thus be automatically changed. The starting gear change can be performed in an uphill situation.