System for inducing economic driving for vehicle

• US 8,744,717 B2
• Filed: 07/03/2012
• Issued: 06/03/2014
• 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
• Primary Examiner(s): Cheung, Mary
• Assistant Examiner(s): BRUSHABER, FREDERICK M
• Application Number:
  US13/540,899
• Publication Number:
  US 20130144501A1
• Time in Patent Office: 700 Days
• Field of Search: 701/93
• US Class Current: 701/93
• CPC Class Codes: B60K 2360/174 Economic driving
• CPC Class Codes: B60K 2370/174 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 controller 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 including a data map consisting of data set for the economic vehicle speed based on the driving resistance and the air-conditioning energy, and configured to correspond to the calculated driving resistance and air-conditioning energy with driving restistance and air-conditioning energy data set in the data map to continuously calculate and supply an economic vehicle speed for the vehicle in real time, to correlate the driving resistance to an amount of energy currently being consumed and the econimc vehicle speed; and

a display configured to display the economic vehicle speed calculated by the controller to a driver,

wherein air-conditioning energy values that vary depending on a target temperature are provided in the data map.

2. The system for inducing economic driving for a vehicle of claim 1, wherein the driving resistance depending on the rolling friction of the controller 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 controller 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 controller 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 the controller is further configured to calculate an energy efficiency based on a ratio 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 displays both the economic vehicle speed and the energy efficiency calculated by the controller.

6. 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.

7. 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.

8. 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.

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

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

calculating, by the controller, 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, corresponding the calculated driving resistance and air-conditioning energy with driving restistance and air-conditioning energy data set in a data map to continuously calculate and supply an 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 econimc vehicle speed; and

displaying, by a display, the economic vehicle speed calculated by the controller to the driver,

wherein air-conditioning energy values that vary depending on a target temperature are provided in the data map.

10. The method of claim 9, further comprising:

calculating, by the controller, an energy efficiency based on a ratio 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 displays both the economic vehicle speed and the energy efficiency calculated by the controller.

11. The method of claim 9, 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.

12. The method of claim 9, wherein a force applied to the vehicle due to air resistance is equal to half of an air resistance coefficient times a front projection area, and a present vehicle speed of the vehicle.

13. The method of claim 9, 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.

14. 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, correspond the calculated driving resistance and air-conditioning energy with driving restistance and air-conditioning energy data set in a data map to continuously calculate and supply an 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 econimc vehicle speed; and

program instructions that display the economic vehicle speed to the driver,

wherein air-conditioning energy values that vary depending on a target temperature are provided in the data map.

15. The non-transitory computer readable medium of claim 14, further comprising:

program instructions that calculate an energy efficiency based on a ratio 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 displays both the economic vehicle speed and the energy efficiency calculated by the controller.

16. The non-transitory computer readable medium of claim 14, 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.

17. The non-transitory computer readable medium of claim 14, wherein a force applied to the vehicle due to air resistance is equal to half of an air resistance coefficient times a front projection area, and a present vehicle speed of the vehicle.