Simulation of operating loads of a city bus powertrain

International Automotive Conference 2018

Kaczalski, P.^1 ; laski, G.^2

Solaris Bus and Coach S.A., ul. Obornicka 46, Bolechowo-Osiedle

62-005, Poland^1

Poznan University of Technology, Maria Sklodowska-Curie Square 5, Poznan

60-965, Poland^2

关键词: 2-D histograms;    Load distributions;    Operating condition;    Operating loads;    Passenger loads;    Simulation procedures;    Traffic characteristics;    Velocity signals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/421/2/022034/pdf
DOI  :  10.1088/1757-899X/421/2/022034

来源: IOP

【 摘 要 】

The paper presents a method to simulate operating loads of a city bus powertrain performed to get an estimation of percentage shares of load distribution (driveshaft torque values) for a city operation of a bus. The method assumes connecting the operating tests with a computer simulation which combines a signals of powertrain loads from samples recorded in a various operating conditions (the weight of the bus/number of passengers, road slope, average speed for short distances) due to different traffic characteristics changing with topography and the time of the day. The sources and ways to collect information about these variables are presented. The next part of the article presents an operating road test and method of measurement drive shaft torque. Also alternative method of estimating drive shaft torque signal with use of the recorded bus velocity signal and a topography information with bus passenger load factor information was presented. The simulation procedure which was presented and statistically processed results in the form of a 2D histogram of frequency of occurrence of particular torque values. The final part of the paper presents a result of a comparison of percentage share of particular torque variability for all-day operation for a chosen route in Warsaw obtained during proposed simulation with a similar percentage share obtained for loads registered within independent road test on the same route.