King County Metro - Allison Hybrid Electric Transit Bus Testing National Renewable Energy Laboratory

Format:

Conference/Event

Author/Creator:

Hayes, R. Robert, author.

Conference Name:

SAE 2006 Commercial Vehicle Engineering Congress & Exhibition (2006-10-31 : Rosemont, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2006

Summary:

Chassis dynamometer testing of two 60 foot articulated transit busses, one conventional and one hybrid, was conducted at the National Renewable Energy Laboratory's, ReFUEL facility. Both test vehicles were 2004 New Flyer busses powered by Caterpillar C9 8.8L engines, with the hybrid vehicle incorporating a GM-Allison advanced hybrid electric drivetrain. Both vehicles also incorporated an oxidizing diesel particulate filter. The fuel economy and emissions benefits of the hybrid vehicle were evaluated over four driving cycles; Central Business District (CBD), Orange County (OCTA), Manhattan (MAN) and a custom test cycle developed from in-use data of the King County Metro (KCM) fleet operation. The hybrid vehicle demonstrated the highest improvement in fuel economy (mpg basis) over the low speed, heavy stop-and-go driving conditions of the Manhattan test cycle (74.6%) followed by the OCTA (50.6%), CBD (48.3%) and KCM (30.3%). With similar trends to fuel economy improvements the hybrid showed improvement in NOx emissions over the Manhattan cycle (38.7%), the OCTA (28.6%), CBD (26.6%) and KCM (17.8%). Effects of air conditioning loads and grade were also studied

Notes:

Vendor supplied data

Publisher Number:

2006-01-3570

Access Restriction:

Restricted for use by site license