Download presentation
Presentation is loading. Please wait.
Published byJordan Johnston Modified over 8 years ago
1
MOBILE6 and Compressed Natural Gas Vehicles Janet Kremer U.S. EPA Office of Mobile Sources
2
Current Models Scope All highway mobile sources (cars and trucks) b HC, CO and NOx Emissions b Exhaust and non-exhaust
3
Fuel Types b Gasoline (including RFG) b Diesel b Compressed Natural Gas (MOBILE6)
4
Emission Standards b LEVs, ULEVs & ZEVs b Assumes these vehicles are operated the same as other vehicles b No allowance for separate commercial fleet fraction
5
Compressed Natural Gas Vehicles in MOBILE6 b Certified Conversion and OEM Vehicles b Single Fuel Vehicles b Light Duty and Heavy Duty b User Input: Percent CNGVs by Model Year
6
DATA b Lack of In-use data b GRI study b 12 vehicles; 6 CNG, 6 Gasoline b FTP Driving Cycle
7
Methodology for Light-duty Vehicles b Assumes CNG vehicles operate and accumulate mileage similar to their gasoline counterparts b CNG = ULEV b CNG benefit is equal to the percent reduction in emissions b Applies to all light-duty vehicles
8
Light-duty Gasoline ULEV vs. Light-duty CNG
9
Methodology for Heavy-duty Vehicles b Heavy-duty CNG vehicles operate and accumulate mileage similar to heavy- duty diesel and gasoline b Heavy-duty CNG emissions = federal 2004 heavy-duty diesel standards b CNG benefit = difference in standards (for Nox only)
10
CNG in MOBILE6 b Assumptions and corrections associated with ULEV will apply to CNG b No fuel corrections apply to CNG b No non-exhaust emissions associated with CNG vehicles
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.