Mobile Source Support and Engine Certification

Who Needs Mobile Source Support Services?

Trinity provides mobile source support services to companies needing to quantify emission reductions from fuel or vehicle/engine changes, certify engines and equipment for sale in North America, or operate fleets in California. The emission reductions associated with mandatory and voluntary emission control programs involving changes in commercial fuel properties or vehicle/engine components are quantified using one or more mobile source emissions models. Trinity's modeling support may be provided to evaluate compliance strategies, to demonstrate compliance with regulations, and/or to earn credit for voluntary emission reductions. Trinity also offers assistance with the certification of vehicles and engines with U.S. EPA and the California Air Resources Board (CARB), as well as compliance strategy and support for owners/operators of non-road diesel equipment fleets based in California that are subject to CARB's in-use fleet rules and agreements, a list of which is provided below.

Mobile Source Modeling Analysis

Trinity's team has an extensive history with mobile source emission factor, emission inventory, and vehicle simulation models, covering both model development and model application. These models include U.S. EPA's MOVES, MOBILE, and NONROAD series and CARB's EMFAC and OFFROAD series. We also develop customized versions of MOVES, MOBILE, NONROAD, and EMFAC to address specific client needs and have adapted and implemented a vehicle simulation model, VEHSIM, for a variety of applications.

Vehicle and Engine Certification Support

Vehicle and engine manufacturers seeking to sell their products in North America must first obtain emissions certification from regulatory agencies including U.S. EPA, CARB, and Environment Canada (EC), and the International Maritime Organization (IMO) for marine engines that operate in designated Environmental Control Areas (ECAs) outside of U.S. waters.
Certification requirements apply to a wide range of engines, vehicles, and equipment, including the following:

• Passenger cars and light-duty trucks
• Heavy-duty engines and vehicles
• On- and off-road motorcycles
• Off-road recreational vehicles and personal watercraft
• Small spark ignition engines (lawn and garden equipment, etc.)
• Large spark ignition engines (forklifts, etc.)
• Non-road diesel engines (e.g., agricultural, construction, and industrial equipment)
• Marine engines
• Locomotives

In-Use Compliance Support

Trinity offers support related to the development of compliance strategies for owners/operators of California-based diesel vehicle and equipment fleets subject to one or more of the following regulations or agreements:

• 1998 Locomotive NOx Fleet Average Emissions Agreement in the South Coast Air Basin
• 2005 Statewide Railyard Agreement
• Concepts to Reduce Emissions from Locomotives and Railyards (regulation under development)
• Regulation to Reduce Emissions of Diesel Particulate Matter, Oxides of Nitrogen, and Other Criteria Pollutants from In-Use Heavy-Duty Diesel-Fueled Vehicles (Truck and Bus Rule)
• Periodic Smoke Inspection Program
• Emission Control Label Inspection Program Regulation
• Airborne Toxic Control Measure to Limit Diesel-Fueled Commercial Motor Vehicle Idling
• California Smog Check Program
• Regulation for In-Use Off-Road Diesel-Fueled Fleets
• Large Spark-Ignition (LSI) Engine Fleet Requirements Regulation
• In-Use On-Road Diesel-Fueled Heavy-Duty Drayage Trucks
• Regulation for Mobile Cargo Handling Equipment at Ports and Intermodal Rail Yards
• Airborne Toxic Control Measure for In-Use Diesel-Fueled Transport Refrigeration Units (TRU) and TRU Generator Sets, and Facilities Where TRUs Operate
• Transport Refrigeration Unit Regulation (regulation under development)
• Portable Diesel Engine ATCM
• Portable Equipment Registration Program