Abstract
Keywords: Robotised Transmission, Control System, Algorithm Development
Goal of the project One of the most important target in the field of passenger comfort optimization is the feeling and the stability of the vehicle when the car is in the cornering condition and set in the automatic gearshift mode. To achieve this target it is necessary to know the lateral car acceleration and elaborate an algorithm that inhibits the gear shifting when particular conditions are recognized. The gear shift should not be performed to quickly leave the curve and to guarantee a good car control and feeling.
The first approach to resolve this problem was to find a solution that estimates the lateral car acceleration using the difference of wheel velocity in corner condition to build an algorithm that inhibits the automatic gear shift. Several car constructors implemented this solution on their automatic gearboxes cars with good results in many road conditions except when there is a rapid change of direction and when a double consecutive cornering takes place.