Volvo engines meet California standards with very low NOx emissions

Volvo D16

The Trucker News Services

4/7/2008

DUBLIN, Va. — Volvo Trucks North America’s customers may now take advantage of a new feature to meet California’s very stringent low-emissions truck idling requirements.  Volvo trucks equipped with this feature comply with California regulations, with the benefit of very low nitrogen oxides (NOx) emissions, the manufacturer said.

Volvo’s family of D11, D13 and D16 engines can be ordered with an optional Low NOx Idle, or LNI, feature.  With LNI, Volvo engines are certified to emit 30 gr/hr or less of NOx while idling. California regulations prohibit trucks which do not meet this standard from idling for more than five minutes.  Pennsylvania and New Jersey have adopted the requirement and other states are considering it.

“As part of our environmental core value, Volvo has always promoted turning the engine off when a truck is not in use to reduce emissions and to conserve fuel,” said Matt Kelly, Volvo’s executive director — marketing.  “However, it may be necessary to idle the engine while parked for a prolonged period in order to provide a comfortable environment to the driver who may be resting in the truck, such as during particularly hot or cold weather.” 

Volvo’s LNI solution involves idling at a low 700 rpm, while also employing a low level of exhaust gas recirculation.  This reduces fuel consumption compared to higher idle speeds, and lowers NOx emissions.  It also is designed to provide faster engine warm-up, so the truck can be driven sooner after a cold start, which saves time and fuel, all with lower emissions.  Volvo engines can be safely idled for extended periods of time. 

The Cummins ISX, which is available in some Volvo truck models, also meets the California NOx limits.  So all engines built after January 1, 2008 for Volvo trucks are certified to meet the NOx idle limits, according to the company. Volvo trucks with these engines are now in production.
Volvo Trucks North America assembles its Volvo VT, VN and VHD trucks in the United States, at the New River Valley Plant in Dublin, Va.  Volvo engines for North America are assembled in Hagerstown, Md.

Volvo Trucks North America is part of the Volvo Group, one of the world's leading manufacturers of trucks, buses and construction equipment, drive systems for marine and industrial applications, aerospace components and services, and is the world's leading producer of heavy-diesel engines (9-16 liter).