Patent ID: 9694687
Date: 2017-07-04
CPC Classifications: B60L,B60W,Y02T

Claim:
1. A method for displaying a fuel efficiency increasing rate during eco-coasting for an electric vehicle, the method comprising: providing, by a controller equipped in the vehicle, eco-coasting guidance by informing a driver of the vehicle of an optimal coasting point at which controlling the vehicle without operation of a brake or accelerator pedal will cause the vehicle to decelerate to a desired speed upon a given location; determining, by the controller, whether the driver of the vehicle adheres to the eco-coasting guidance based on whether the vehicle is controlled in accordance with the optimal coasting point; receiving, by an input unit equipped in the vehicle, a destination and a driving route to the destination; calculating, by the controller, a total energy consumption across a plurality of eco-coasting performance sections, in which the driver adheres to the eco-coasting guidance while driving along the driving route, based on a current of a battery of the vehicle and a voltage of the battery in each eco-coasting performance section; summing, by the controller, energy gain rates to calculate a total energy gain rate while driving along the driving route when the driver adheres to the eco-coasting guidance, compared to when the driver does not adhere to the eco-coasting guidance, in each of the eco-coasting performance sections, simultaneously with calculating the total energy consumption; calculating, by the controller, the fuel efficiency increasing rate when the driver adheres to the eco-coasting guidance, compared to when the driver does not adhere to the eco-coasting guidance, based on the calculated total energy gain rate; and displaying, by an output unit equipped in the vehicle, the calculated fuel efficiency increasing rate.