Automatic gearbox control for motor vehicle - uses vehicle wt. calculator, output torque estimator and stored gear setting tables to select gear taking into account required acceleration

摘要

The control of an automatic gearbox for a car has a device for estimating the weight of the vehicle, a device for estimating the output torque, an acceleration input device receiving the acceleration signal and a load estimator, using the estimated weight, torque and required acceleration as input parameters. A memory unit stores at least two gear position tables. A gear selection device chooses one of the table, corresp. to the vehicle weight and estimated load, and then determines the optimum gear setting. A neuron network is supplied with values of throttle opening and acceleration in order that the vehicle weight can be estimated. ADVANTAGE - By exact matching of the selected gear to vehicle weight and load, fuel consumption can be improved.