Abstract: A method and device for driving assistance for a propulsion unit of a vehicle with manual control of the transmission gear ratio, using a control system with a calculator controlling an indication to a driver of a recommended gear ratio based on a request information from the driver and depending on driving conditions of the vehicle at any moment, and a mapping of the gear change rules from which the ratio to be recommended is determined, depending on the vehicle speed at each moment, for an optimal fuel consumption and a minimized pollutant emission. The recommended ratio for an optimal consumption is corrected in successive steps by taking into account, one after the other, a set of constraints concerning the driving safety and comfort, each step having priority over the previous one so that the ratio finally recommended is an optimal balance between the different constraints while putting an emphasis on driving safety.

Abstract: A method for controlling operation of a power unit group of a vehicle including at least one driving engine, a manual gearbox with plural gears and a clutch, in which a control system with a computer determines the target power to be supplied by the power unit group depending on information corresponding to an intention of the driver and displayed on an input of the computer. During a gear change, the information on the driver's intention is frozen during the clutch opening time so that the control system does not take into account a potential disturbing information, such as a quick foot release, displayed on the input between the clutch opening moment and the clutch closing moment to determine the target power to be supplied. The method can be applied particular to a manual gearbox having a system for displaying the recommended gear ratio on the dashboard.

Abstract: A method for controlling operation of a power unit group of a vehicle including at least one driving engine, a manual gearbox with plural gears and a clutch, in which a control system with a computer determines the target power to be supplied by the power unit group depending on information corresponding to an intention of the driver and displayed on an input of the computer. During a gear change, the information on the driver's intention is frozen during the clutch opening time so that the control system does not take into account a potential disturbing information, such as a quick foot release, displayed on the input between the clutch opening moment and the clutch closing moment to determine the target power to be supplied. The method can be applied particular to a manual gearbox having a system for displaying the recommended gear ratio on the dashboard.

Abstract: A method and device for driving assistance for a propulsion unit of a vehicle with manual control of the transmission gear ratio, using a control system with a calculator controlling an indication to a driver of a recommended gear ratio based on a request information from the driver and depending on driving conditions of the vehicle at any moment, and a mapping of the gear change rules from which the ratio to be recommended is determined, depending on the vehicle speed at each moment, for an optimal fuel consumption and a minimized pollutant emission. The recommended ratio for an optimal consumption is corrected in successive steps by taking into account, one after the other, a set of constraints concerning the driving safety and comfort, each step having priority over the previous one so that the ratio finally recommended is an optimal balance between the different constraints while putting an emphasis on driving safety.