Method for gear selection during driving of a vehicle in a heavy uphill drive condition

US7912615B2 · kind B2 · utility

Assignee

• VOLVO LASTVAGNAR AB · SE

Inventors

• Anders Lindgren · Alvesta, SE
• Sixten Berglund · Torslanda, SE
• Peter Templin · Mörbylånga, SE
• Anders Eriksson · Torslanda, SE

Key dates

• Filing date: Dec 9, 2005
• Grant date: Mar 22, 2011
• Expiry date: Feb 28, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0234
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for gear selection during driving of a vehicle in a heavy uphill drive condition is provided, the vehicle including an engine, an automated mechanical transmission, a clutch, a control unit for receiving input signals including signals indicative of vehicle speed, engaged ratio of the transmission, rotational speed of the engine, rotational speed of a input shaft and displacement of a throttle control for engine torque request, and for processing the signals in accordance with programmed logic rules to issue command output signals to the engine, to the transmission and to said clutch. When sensing a heavy uphill drive condition a target gear is determined for the uphill drive condition, the target gear being the highest possible gear with lowest possible gear ratio where the vehicle, in view of at least current circumstances, will be at least theoretically able to hold a constant vehicle speed or accelerate at least slightly, and where further selection of downshifts will be adapted so that no lower gear than the target gear will be selected and engaged.