Method for automatically switching a motor vehicle to freewheel mode

US10427667B2 · kind B2 · utility

Assignees

• Renault S.A.S. · FR
• GETRAG FORD Transmissions GmbH · GB

Inventors

• Gregory Planche · Orsay, FR
• Bertrand Nodin · Igny, FR
• Pedro Moreno Lahore · Paris, FR
• Harald Schmitz · Weinheim, DE
• Axel Prenger-Berninghoff · Erkelenz, DE

Key dates

• Filing date: Dec 10, 2015
• Grant date: Oct 1, 2019
• Expiry date: May 24, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60W2710/025
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The invention concerns a method for automatically controlling a motor vehicle (10) for switching from a “normal” mode to a “freewheel” mode, the vehicle (10) comprising an engine (12) capable of providing engine torque to drive wheels (14) via an automatically controlled clutch device (18) that comprises a drive shaft (15) and a driven shaft (16). A transition step (E1) is interposed chronologically between the “normal” mode and the “freewheel mode” during which the engine (12) is automatically controlled in such a way that the driven shaft (16) and the drive shaft (15) turn at the same speed without transmitting torque to the drive wheels (14).