Browse Publications Technical Papers 2006-01-3475

A “Mini-Hybrid” Transit Bus with Electrified Cooling System 2006-01-3475

A Diesel engine-powered transit bus was fitted with a powertrain thermal management system comprised of electrified components, including fans, coolant pump, and electronic thermostat. A high output belt-driven 24 volt DC alternator was installed to provide power for this system in addition to the normal bus electrical power loads. Except for the alternator, all components were mounted on a slide-mounted tray to facilitate service and maintenance.
In practice, this “mini-hybrid” vehicle has demonstrated a fuel economy improvement of 10.5% in fleet operation during a four month period and is expected to achieve 5-7% better fuel economy annually, compared to a conventional bus. Additional benefits include lower maintenance costs, improved safety, and enhanced serviceability.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 40% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.