Method of evaluating integrated running energy of vehicle in wind tunnel
AssigneesHyundai Motor Company, Kia Corporation
InventorsJi Min Jeong, Jin Hyuck Chang, Min Sik Chung
Life of this patent
Estimating the term…
Abstract
A method of evaluating integrated running energy of a vehicle in a wind tunnel may include estimating change in fuel efficiency according to change of vehicle parts thereby facilitating precise measurement of running energy.
Claims20
A method of evaluating integrated running energy of a vehicle in a wind tunnel, the method comprising:
- placing the vehicle in the wind tunnel;
- changing vehicle speeds by rotating wheels of the vehicle to obtain a plurality of constant speed sections and a plurality of speed change sections, wherein the vehicle speeds are held constant in each constant speed section, the plurality of constant speed sections have different constant speeds with each other, and the vehicle speeds are increased or decreased between adjoining constant speed sections in the plurality of speed change sections;
- measuring and collecting exerted forces for rotating the wheels in each of the plurality of constant speed sections and exerted forces for rotating the wheels in each of the plurality of speed change sections;
- separating the exerted forces in each of the plurality of constant speed sections from the exerted forces in each of the plurality of speed change sections;
- determining running energy of the plurality of constant speed sections according to the separated exerted forces in each of the plurality of constant speed sections and determining running energy of the plurality of speed change sections according to the separated exerted forces in each of the plurality of speed change sections;
- and
- acquiring the integrated running energy of the vehicle according to the running energy of the plurality of constant speed sections and the running energy of the plurality of speed change sections.
A method of evaluating integrated running energy of a vehicle in a wind tunnel, wherein a test vehicle is positioned in the wind tunnel provided with a wheel rotating device and wheels of the test vehicle are rotated by the wheel rotating device, the method comprising:
- performing a warm-up of the test vehicle;
- evaluating deceleration of the test vehicle;
- separating data obtained from the evaluating of the deceleration of the test vehicle, into a plurality of constant speed sections and a speed change section;
- determining running energy of the plurality of constant speed sections and running energy of the speed change section;
- and
- acquiring the integrated running energy of the vehicle according to the determined running energy of the plurality of constant speed sections and the determined running energy of the speed change section.
Dependencies are inferred from the claim text.