Method and system for a vehicle

摘要

A method for running of a vehicle having a combustion engine which can selectively be connected to a driveshaft (104, 105) for propulsion of the vehicle, the vehicle can be run in a first mode (M1) with the engine connected to the driveshaft (104, 105) and in which fuel supply to the engine is substantially shut off, in a second mode (M2) with the engine disconnected from the driveshaft (104, 105) and a third mode like the first mode, but with the fuel supply not cut off. On a downgrade, determining whether running in the first mode (M1) will result in a speed increase, and then running in the second mode (M2) if running it in the first mode (M1) would cause a speed increase.

主权项

1. A method for running a vehicle, wherein the vehicle comprises a combustion engine and a driveshaft to which the engine can selectively be connected to deliver driving force to the driveshaft for propulsion of the vehicle;
the vehicle is selectively run in a first mode (M1) in which the engine is connected to the driveshaft and a fuel supply to the engine is substantially shut off, and in a second mode (M2), in which the engine is disconnected from the driveshaft; wherein the vehicle is or will be travelling on a downgrade; the method comprises: determining whether running the vehicle on the downgrade in the first mode (M1) will result in a speed increase of the vehicle; and then running the vehicle in the second mode (M2) if running the vehicle in the first mode (M1) would result in a speed increase of the vehicle.