Abstract
Advanced strategies have been developed for the control of automotive CVT powertrains which allow fuel economy and emissions to be tuned easily and can include consideration of vehicle drivability.
The techniques were developed using a combination of computer simulation, rig test work and vehicle tests. The demonstrator powertrain comprised a compression belt CVT and a 1.8L direct injection turbocharged and intercooled Diesel engine, both under the drive by wire control of a supervisory microprocessor. Simulation and experimental results are presented which show the flexibility of the strategies developed and the improvements possible in performance and emissions.