WLTPEU DB short trip analyis Overview of the
WLTP-EU DB short trip analyis Overview of the WLTP-EU database short trip analysis by H. Steven 30. 09. 2014 1
Categorisation of the Database • The WLTP in-use database contains second by second data from Europe, India, Japan, Korea and US. • For the analysis the WLTP in-use data was divided into short trips and stop phases. • Stop phases are time periods with vehicle speeds < 1 km/h, a short trip is a time period with v >= 1 km/h between two consecutive stops. • A further segmentation of the data was done with respect to the max. speed of a short trip: Ø Ø Low phase: v_max <= 60 km/h, Medium phase: 60 km/h < v_max <= 80 km/h, High phase: 80 km/h < v_max <= 110 km/h, Extra high phase: v_max > 110 km/h. 2
Categorisation of the Database • This schema was chosen in order to ease the comparability of in-use data from different regions of the world (India, Japan, Korea, US) • This presentation focusses on the European part of the database. • The EU part of the WLTP in-use database contains data from the following member states: Ø Belgium, France, Germany, Italy, Poland, France, Slovenia, Spain, Sweden, UK. • Within the short trips the following driving condition phases were differentiated: 3
Categorisation of the Database • Ø Acceleration (acc): a > 0, 278 m/s², Ø Cruise : -0, 278 m/s² <= a <= 0, 278 m/s², Ø Deceleration (dec): a < -0, 278 m/s² Table 1 shows an overview of the results: 4
Short trip duration distribution • The following figures show the duration and distance distributions of the short trips for the four speed classes, number and distance or time weighted. • The major part of the short trips in the low speed class is shorter than 2 min. And even for the extra high speed part 50% of the short trips are below 13 min. • The distance weighting changes this situation to longer durations: The short trips below 13 min in extra high represent less than 20% of the total mileage. 5
Short trip duration distribution Figure 1 6
Short trip duration distribution Figure 2 7
Short trip distance distribution Figure 3 8
Short trip distance distribution Figure 4 9
Driving condition distributions • Table 2 shows the duration distributions of the acceleration phases for the short trips of the four speed classes. • All phases have durations below 1 min. • Figure 5 shows the duration distributions of the cruise phases for the short trips of the four speed classes. • These phases are significantly longer than the others. • Table 3 shows the duration distributions of the deceleration phases for the short trips of the four speed classes. • The durations of the deceleration phases tend to be a bit longer than the acceleration phases, but the differences are very low. 10
Categorisation of the Database Table 2 11
Short trip distance distribution Figure 5 12
Categorisation of the Database Table 3 13
End of presentation Thank you for your attention! 14
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