Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

Fuel Economy Improvement Cruise Control Algorithm using Distance and Altitude Data of GPS in Expressway

고속도로에서 GPS 거리와 고도데이터를 이용한 연비 향상 정속 순항 제어 알고리즘

  • Received : 2011.01.12
  • Accepted : 2011.05.19
  • Published : 2011.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

A vehicle fuel economy is very important issue in view of fuel cost and environmental regulation. It has been improved according to the performance improvement of the vehicle engine, power train and many components. It was evaluated at given mode (LA-4, FTP-75, etc) on an engine dynamometer or computer simulation program. In this paper, the fuel economy improvement cruise control algorithms as controling a vehicle velocity by road load calculated and predicted in a real expressway with gradient was studied. Firstly, the altitude and distance data which was measured with GPS sensor was already installed in the ECU of a vehicle. Then the vehicle equipped with GPS receiver is driven the same expressway. The ECU calculates the gradient angle and the in-/decreasing velocity using the gradient angle by comparing the current received distance and altitude data from GPS with the saved data ahead of the vehicle. Therefore the ECU can calculate and predict the vehicle velocity considering tolerance velocity of next position with running. Then the ECU controls the vehicle velocity to meet this predicted velocity in all section. Three cruise control algorithms with the different velocity profiles for the improvement of fuel economy are proposed and compared with the computer simulation results that the vehicle runs on Youngdong expressway. The proposed CVELCONT2 and CVELCONT3 algorithms were improved 3.7% and 4.8% of fuel economy compared with CONSTVEL which is steady cruising algorithm. These two algorithms are recommended as the Eco-cruise drive methodologies in this paper.

Keywords

References

  1. J. H. Park, Y. I. Park and J. M. Lee, "Estimation of Real Driving Fuel Consumption Rate of a Vehicle When Driving on Road Including Grade," Transactions of KASE, Vol.9, No.3, pp.65-76, 2000.
  2. T. S. Han, "Trend of Improving Vehicle Fuel Economy," Auto Journal, KSAE, Vol.23, No.2, pp.65-67, 2001.
  3. M. S. Lyu, "Optimization on Vehicle Fuel Consumption in a Highway Bus using Vehicle Simulation," Int. J. Automotive Technology, Vol.7, No.7, pp.841-846, 2008.
  4. A. Berry and M. Blisset, "A New Approach to Improving Fuel Economy and Performance Prediction through Coupled Thermal Systems Simulation," SAE 2002-01-1208, 2002.
  5. Y. Hori, M. Fukuda and Y. Kobayashi, "Computer Simulation of Vehicle Fuel Economy and Performance," SAE 860364, 1986.
  6. J. H. Song, D. J. Kim, C. H. Lee and C. B. Lee, "Simulation of Effect of Vehicle Driving Pattern of Fuel Consumption," Annual Conference Proceedings, KSAE, pp.2039-2044, 2009.
  7. Y. S. Park, S. M. Choi, H. B. Kwon, J. S. Kim, S. B. Um and S. W. Cho, "An Experimental Study on the Fuel Consumption Characteristics of Passenger Cars under Various Driving Conditions," Spring Conference Proceedings, KSAE, pp.3-8, 2003.
  8. J. C. Yoo, H. B. Song, J. H. Lee, J. S. Yoo, Y. M. Park and K. S. Park, "An Experimental Study on Breakdown of Fuel Consumption on a Component Basis in a Gasoline Engine Vehicle," Transactions of KSAE, Vol.12, No.1, pp.153-161, 2004.
  9. Y. J. Jung, Y. W. Yoo, C. G. Ryu, H. J. Jang, and K. B. Bae, "A Study on Fuel Economy and Dynamic Behavior of Vehicle according to Road Load and Shift Pattern of Auto Transmission," Spring Conference Proceedings, KSAE, KSAE10-B0158, pp.1-6, 2010.