Method for a more efficient use of a combustion engine in a vehicle

US10330029B2 · kind B2 · utility

Assignee

• VOLVO LASTVAGNAR AB · SE

Inventors

• Anders Eriksson · Torslanda, SE
• Peter Templin · Mörbylånga, SE

Key dates

• Filing date: Oct 26, 2007
• Grant date: Jun 25, 2019
• Expiry date: Jan 2, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/161
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for a more efficient use of a vehicle combustion engine during driving, the vehicle including an automatic step geared transmission. The method includes the steps of sensing current engine rotational speed and engine rotational speed increase, estimating necessary minimum upshift engine rotational speed for a coming gear upshift, registering that the engine rotational speed stops increasing without reaching the minimum upshift engine rotational speed, and where the engine rotational speed stops increasing relatively close to a maximum engine rotational speed where engine efficiency is relatively low and, automatically controlling engine output torque in order to limit the engine rotational speed to a first predetermined engine speed where engine efficiency is relatively high.