“The Influence of Idle, Drive Cycle and Accessories on the Fuel Economy of Urban Hybrid Electric Buses - Chassis Dynamometer Tests”

2003-01-3438

11/10/2003

Event
International Truck & Bus Meeting & Exhibition
Authors Abstract
Content
Fuel economy can be part of a business case for a fleet making the decision to buy new HD hybrid drivetrain technologies. Chassis dynamometer tests using SAE Recommended Practice J2711 on a bus equipped with an Allison EP SYSTEM ™ hybrid system and operated on standard bus driving cycles have produced impressive gains of over 60%. Preliminary urban bus field tests, on the other hand, have shown lower fuel economy gains. The difference can be attributed, in part, to the use of accessories - most importantly air conditioning - which are parasitic loads on the vehicle. In this paper the characteristics of driving cycles are studied to determine those factors which have the strongest influence on fuel economy for hybrids. The data show that the number of stopping events in a route or cycle is a strong influence as is the average vehicle speed. Energy analysis will show the relationship of fuel economy benefit and battery energy within a driving cycle. Transit managers can use this information to get the most from the hybrid vehicles in their fleet by assigning them to the most effective routes.
Meta TagsDetails
DOI
https://doi.org/10.4271/2003-01-3438
Pages
8
Citation
Bass, E., and Alfermann, T., "“The Influence of Idle, Drive Cycle and Accessories on the Fuel Economy of Urban Hybrid Electric Buses - Chassis Dynamometer Tests”," SAE Technical Paper 2003-01-3438, 2003, https://doi.org/10.4271/2003-01-3438.
Additional Details
Publisher
Published
Nov 10, 2003
Product Code
2003-01-3438
Content Type
Technical Paper
Language
English