Continuously Variable Transmission Modifications and Control for a Diesel Hybrid Electric Powertrain 2004-40-0057
The Center for Transportation Research (CTR) Vehicle Systems
team modified a Nissan CK-2 Continuously Variable Transmission
(CVT) for a diesel hybrid powertrain application. Mechanical and
electrical modifications were made to the CVT, both internal and
external to the transmission. The goal of this experiment was to
investigate and demonstrate the potential of CVT for diesel engines
hybrid electric vehicles (HEVs) in fuel economy and emissions.
The test set-up consisted of a diesel engine coupled to an
electric motor driving a Continuously Variable Transmission (CVT).
This hybrid drive is connected to a dynamometer and a DC electrical
power source creating a vehicle context by combining advanced
computer models and emulation techniques.
The experiment focuses on the impact particular transmission
control strategies have on measured fuel economy and emissions
specifically, nitrogen oxides (NOx) and particulate matter (PM).
The same hardware and test procedure were used throughout the
entire experiment to assess the impact of different control