The next generation of the Volt vehicle with the new â??Voltecâ? extended-range propulsion\nsystem was introduced into the market in 2016. The second-generation Voltâ??s powertrain architecture\nprovides five modes of operation, including two electric vehicle operations and three extended-range\noperations. Vehicle testing was performed on a chassis dynamometer set within a thermal chamber\nat the Advanced Powertrain Research Facility at Argonne National Laboratory. The study first\nfocused on assessing the improvement of the new Voltec system by comparing the system efficiency\nwith the previous system. Second, control behavior and performance were analyzed under normal\nambient temperature to understand the supervisory control strategy on the Voltec system based\non the test data. The analysis focused on the engine on/off strategy, powertrain operation mode,\nenergy management, and engine operating conditions. Third, test data from the control analysis were\nused to summarize the vehicle control logic.
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