Patent ID: 8718914
Filing Date: 2014-05-06
Classification: B60R,B60W,Y02T

Abstract:
1. A device for providing eco-driving information of a vehicle, comprising: a vehicle weight calculating unit configured to calculate a current weight of the vehicle based on data received from a plurality of devices within the vehicle; an electrical load computing unit configured to compute an electrical load of auxiliary machinery currently being used in the vehicle; a vehicle speed calculating unit configured to calculate, using a mileage map, a fuel efficiency oriented vehicle speed that maximizes the vehicle's driving distance according to the calculated vehicle weight and the calculated electrical load; and a display device configured to display the calculated fuel efficiency oriented vehicle speed to a user, wherein the weight of the vehicle is calculated from the power consumption of a vehicle driving motor, an air density, an air resistance coefficient, a projected area of the vehicle, the vehicle speed, a friction coefficient of a road the vehicle is currently driving on, a gravity acceleration, and a slope of the road the vehicle is currently driving on, and wherein the weight of the vehicle is calculated by the following equation where, m is a vehicle weight, TF is driving force, ρ air is air density, C d is an air resistance coefficient, A is a projected area of vehicle, V is the vehicle's current speed, μ is a friction coefficient of the current road, g is the gravitational acceleration of the vehicle, and θ is the current slope of the road, and the driving force is acquired from a relationship of TF=P/V, wherein P represents the power consumption of the driving motor and V represents the vehicle speed, where the vehicle weight calculating unit, the electrical load computing unit, and the vehicle speed calculating unit are incorporated into a single chip, and where the mileage map that includes the vehicle weight, the electrical load, and the vehicle speed is embedded into the single chip.