SYSTEM FOR INDUCING ECONOMIC DRIVING FOR VEHICLE

• US 20130144501A1
• Filed: 07/03/2012
• Published: 06/06/2013
• Est. Priority Date: 12/05/2011
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kim, Sang Joon, Kim, Tae Woo, Yang, Dong Ho
• Granted Patent: US 8,744,717 B2
• Time in Patent Office: Days
• US Class Current: 701/93
• CPC Class Codes: B60K 2360/174 Economic driving
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/28 characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
• CPC Class Codes: B60W 2050/146 Display means
• CPC Class Codes: B60W 2510/305 Power absorbed by auxiliaries
• CPC Class Codes: B60W 2530/16 Driving resistance
• CPC Class Codes: B60W 2720/10 Longitudinal speed
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration

Abstract

Disclosed is a technique for inducing economic driving for a vehicle. In particular, a control unit calculates a driving resistance of a vehicle based on a current rolling friction, air resistance, and a road grade of the vehicle. The an amount of air-conditioning energy consumed by the vehicle is calculated by the control unit, and in response the calculated driving resistance and air-conditioning energy are substituted into a data map to continuously calculate the optimal economic vehicle speed of the vehicle in real time. The optimal economic vehicle speed calculated by the control unit is then displayed to a driver via a display unit.

Claims

1. A system for inducing economic driving for a vehicle, comprising:

a control unit configured to calculate a driving resistance by considering rolling friction of the vehicle, air resistance, and a road grade, calculate air-conditioning energy consumed in an air-conditioning device, and substitute the calculated driving resistance and air-conditioning energy to continuously calculate and supply an optimal economic vehicle speed for the vehicle in real time, wherein the control unit includes a data map that correlates the driving resistance to an amount of energy currently being consumed and the optimal econimc vehicle speed; and

a display unit configured to display the optimal economic vehicle speed calculated by the control unit to a driver.

2. The system for inducing economic driving for a vehicle of claim 1, wherein the driving resistance depending on the rolling friction of the control unit is calculated via a friction coefficient of a vehicle wheel and a weight value of the vehicle

3. The system for inducing economic driving for a vehicle of claim 1, wherein the driving resistance depending on the air resistance of the control unit is calculated via an air resistance coefficient, a front projection area, and a present vehicle speed of the vehicle

4. The system for inducing economic driving for a vehicle of claim 1, wherein the driving resistance depending on the road grade of the control unit is calculated via the weight value of the vehicle and a road slope.

5. The system for inducing economic driving for a vehicle of claim 1, wherein air-conditioning energy values that vary depending on a target temperature are provided in the data map.

6. The system for inducing economic driving for a vehicle of claim 1, wherein the control unit is further configured to calculate an energy efficiency based on a weight of the consumption energy acquired by summing the driving resistance and the air-conditioning energy with respect to a present supplied energy of the vehicle and wherein the display unit displays both the optimal economic vehicle speed and the energy efficiency calculated by the control unit.

7. The system for inducing economic driving for a vehicle of claim 1, wherein a force applied to the vehicle due to rolling friction is equal to a friction coefficient of a vehicle wheel times a weight value of the vehicle time gravity.

8. The system for inducing economic driving for a vehicle of claim 1, wherein a force applied to the vehicle due to air resistance is equal to ½

an air resistance coefficient times a front projection area, and a present vehicle speed of the vehicle

9. The system for inducing economic driving for a vehicle of claim 1, wherein the force applied to a vehicle due to the road grade is equal to the mass of the vehicle times gravity times sin θ

, wherein θ

is equal to a current slope of a road the vehicle is currently traveling on.

10. A method for inducing economic driving for a vehicle, comprising:

calculating, by a control unit, a driving resistance based on rolling friction, air resistance, and a road grade of the vehicle,

calculating, by the control unit, an amount of air-conditioning energy consumed in an air-conditioning device;

in response to calculating the driving resistance and the amount of air-conditioning energy consumed by the vehicle, substituting the calculated driving resistance and air-conditioning energy in to a data map to continuously calculate and supply an optimal economic vehicle speed for the vehicle in real time to a driver, wherein the data map correlates the driving resistance to an amount of energy currently being consumed and the optimal econimc vehicle speed; and

displaying, by a display unit, the optimal economic vehicle speed calculated by the control unit to the driver.

11. The method of claim 10, wherein air-conditioning energy values that vary depending on a target temperature are provided in the data map.

12. The method of claim 10, further comprising:

calculating, by the control unit, an energy efficiency based on a weight of the consumption energy acquired by summing the driving resistance and the air-conditioning energy with respect to a present supplied energy of the vehicle and wherein the display unit displays both the optimal economic vehicle speed and the energy efficiency calculated by the control unit.

13. The method of claim 10, wherein a force applied to the vehicle due to rolling friction is equal to a friction coefficient of a vehicle wheel times a weight value of the vehicle time gravity.

14. The method of claim 10, wherein a force applied to the vehicle due to air resistance is equal to ½

an air resistance coefficient times a front projection area, and a present vehicle speed of the vehicle

15. The method of claim 10, wherein the force applied to a vehicle due to the road grade is equal to the mass of the vehicle times gravity times sin θ

, wherein θ

is equal to a current slope of a road the vehicle is currently traveling on.

16. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:

program instructions that calculate a driving resistance based on rolling friction, air resistance, and a road grade of the vehicle,

program instructions that calculate an amount of air-conditioning energy consumed in an air-conditioning device;

program instructions that, in response to calculating the driving resistance and the amount of air-conditioning energy consumed by the vehicle, substitute the calculated driving resistance and air-conditioning energy in to a data map to continuously calculate and supply an optimal economic vehicle speed for the vehicle in real time to a driver, wherein the data map correlates the driving resistance to an amount of energy currently being consumed and the optimal econimc vehicle speed; and

program instructions that display the optimal economic vehicle speed to the driver.

17. The non-transitory computer readable medium of claim 16, wherein air-conditioning energy values that vary depending on a target temperature are provided in the data map.

18. The non-transitory computer readable medium of claim 16, further comprising:

program instructions that calculate an energy efficiency based on a weight of the consumption energy acquired by summing the driving resistance and the air-conditioning energy with respect to a present supplied energy of the vehicle and wherein the display unit displays both the optimal economic vehicle speed and the energy efficiency calculated by the control unit.

19. The non-transitory computer readable medium of claim 16, wherein a force applied to the vehicle due to rolling friction is equal to a friction coefficient of a vehicle wheel times a weight value of the vehicle time gravity.

20. The non-transitory computer readable medium of claim 16, wherein a force applied to the vehicle due to air resistance is equal to ½

an air resistance coefficient times a front projection area, and a present vehicle speed of the vehicle