Method and device for assisting in driving a road vehicle.

摘要

1. Method to assist in the driving of a road vehicle, characterized in that it consists in : - measuring the speed and the load of the engine ; - determining from the preceding data the point of operation on the characteristic load/speed graph ; - determining the state of the gearbox, that is to say determining what is the speed ratio engaged ; - estimating the different possible points of operation in relation to the equal fuel consumption ranges of the load/speed graph, and in relation to the operating possibilities with other gearbox ratios ; - if needs be to indicate on the one hand the need to change gear, and on the other hand the new ratio advised, the vehicle speed remaining constant.