Development of advanced air conditioncontroller for urban buses

• Main Author: Thede, Patrik
• Format: Others
• Language: English
• Published: KTH, Reglerteknik 2012
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105138

The Advanced Air Condition Controller (AACC) function presented in this master thesis reduces fuel consumption for the Air Condition (AC) compressor in urban buses. This is done by compressing cooling refrigerant at locations where the AC compressor can use freely available energy in the vehicle. The AC system could for example compress cooling medium in a downhill or when a deceleration is done. In this master thesis three dierent AACC functions have been developed. The first utilize Look Ahead (LA) information. The second utilize information about the current slope of the vehicle. The third AACC function is a combination of the two others. The AACC function that utilize LA information can decreased fuel consumption with 0.25%. The AACC function that utilize slope information can decrease fuel consumption with 0.15%. The AACC function that combines the best of the two other functions can decrease fuel consumption with 0.37%. For comparison, sometimes it is said that 1% fuel reduction is equivalent to one year of engine development. The decrease in fuel consumption can be done without major impacts on temperature climate inside the bus body. The simulation have been performed on a recorded bus route in Sodertalje.