SYSTEMS AND METHODS FOR IMPLEMENTING A VEHICLE DRIVE MODE

An engine system for a vehicle includes a controller coupled to an engine, an electric machine, a battery, a series of user input devices, and a transmission. The controller is configured to perform operations. The operations include receiving information regarding the state of operation of the vehicle, further including information regarding vehicle speed, transmission speed, and drive demand power. The controller is further configured to calculate a fuel saved ratio representing efficiency of the engine system and determine how to maximize the efficiency of the system. The operations of the controller further include operating the components of the engine system in order to maximize system efficiency and fuel savings.