This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Development of a City Bus Driving Cycle in Seoul Based on the Actual Patterns of Urban Bus Driving
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 06, 2009 by SAE International in United States
Annotation ability available
Studies of driving cycles for buses have been published in a number of papers, e.g., the Central Business District (CBD) and New York Bus (NY Bus) driving cycles. Such studies, however, cannot represent the actual driving environment of Seoul because of differences in road conditions and the volume of traffic. Thus, this study presents the development of a driving cycle for the city bus system of Seoul, the capital city of Korea.
A representative route is selected by means of a statistical analysis of the city bus routes in Seoul. Experiments are performed to measure velocity, road grade, engine speed, load conditions, gear-shift patterns, and vehicle acceleration in actual Seoul traffic. A simulation model is developed to evaluate a driving cycle on the basis of the measured data obtained. The coupling effect between velocity and acceleration is analyzed, as well as the coupling effect between road grade and vehicle acceleration. A driving cycle is then proposed based upon an analysis of parameters drawn from the experimental data.
The cycle is evaluated by means of simulation and a test that employs a chassis dynamometer. The evaluation is performed in relation to fuel economy, drivability, and engine operating conditions in both the proposed driving cycle and actual driving conditions. After several rounds of reconstruction, a city bus driving cycle for Seoul has finally been proposed. The final driving cycle consists of a velocity profile, road grade factors, and a timed approach to gear shift timing.
This final product is called the Seoul City Bus Driving Cycle (SCBDC). The running time of the cycle is 1,320 s with 344 s of idle time. The average velocity is 29.2 km/h, with a maximum of 67.0 km/h over a total distance of 7.86 km. The fuel economy in the SCBDC is 2.36 km/I, as opposed to 2.32 km/I for actual Seoul traffic. There were few differences in terms of velocity distribution, acceleration, road grade, and engine operating conditions between the SCBDC and actual Seoul traffic.
|Technical Paper||Operating a 12-meter Hybrid-Electric Bus in Bangkok|
|Technical Paper||Common Automobile Program to Improve Mass Transportation|
|Technical Paper||Transbus - Current Developments in Urban Bus Design|
CitationWi, H., Park, J., Lee, J., Kim, W. et al., "Development of a City Bus Driving Cycle in Seoul Based on the Actual Patterns of Urban Bus Driving," SAE Technical Paper 2009-01-2914, 2009, https://doi.org/10.4271/2009-01-2914.
- Brodrick Christie-Joy Sperling Daniel Dwyer Harry A. Becker Christine 2002 “Emissions from Conventional and Hybrid Electric Transit Buses Tested on Standard and San Francisco Specific Driving Cycles.” SAE 2002-01-3117
- Wang B. H. Luo Y. G. Zhang J. W. 2008 “Simulation of City Bus Performance Based on Actual Urban Driving Cycle in China.” Int. J. Automotive Technology 9 4 501 507
- Bruneel Hans 2000 “Heavy Duty Testing Cycles Development: A New Methodology.” SAE 2000-01-1860
- Pelkmans Luc Keukeleere Dirk De Bruneel Hans Lenaers Guido 2001 “Influence of Vehicle Test Cycle Characteristics on Fuel Consumption and Emissions of City Bus.” SAE 2001-01-2002
- Hung W. T. Tong H. Y. Lee C. P. Ha K. Pao L. Y. 2007 “Development of a practical driving cycle construction methodology: A case study in Hong Kong.” Transportation Research Part D 12 115 128
- Wang Qidong Huo Hong He Kebin Yao Zhiliang Zhang Qiang 2008 “Characterization of vehicle driving patterns and development of driving cycles in Chinese cities.” Transportation Research Part D 13 289 297
- Baek W. Song B. Kim Y. Hong S.-K. 2007 “Roll and Pitch Estimation via an Accelerometer Array and Sensor Networks.” Int. J. Automotive Technology 8 6 753 760