Patent Document ID: 9139095
Application ID: 13548372
Patent Flag: 1

Claim One:
1. A method for calculating Distance to Empty (DTE) in an electric vehicle, comprising: calculating, by a controller, a learning DTE by blending an average fuel efficiency stored during a past charge cycle and an average fuel efficiency within a current single charge cycle; calculating, by the controller, a section DTE using an average fuel efficiency over a certain section within the current single charge cycle; and simultaneously displaying, by the controller, the learning DTE and the section DTE on a cluster, wherein the calculating of the learning DTE comprises: calculating a past driving average fuel efficiency (R 0 ); calculating an air conditioning average energy consumption rate (R_AC) during past driving; calculating a past driving average fuel efficiency (R 1 ) from the past driving average fuel efficiency (R 0 ) and the air conditioning average energy consumption rate (R_AC), assuming an air conditioning apparatus is unused; calculating a current driving fuel efficiency (R 2 ); blending the past driving average fuel efficiency (R 1 ) and the current driving fuel efficiency (R 2 ); and calculating a final learning DTE from a driving fuel efficiency (R 3 ) obtained by the blending of the past driving average fuel efficiency (R 1 ) and the current driving fuel efficiency (R 2 ).