Volvo Engines Get Clean Idle Certification

Posted on April 2, 2008

Volvo Trucks North America announced that its family of D11, D13 and D16 diesel engines can be ordered with an optional Low NOx Idle (LNI) feature that allows them to meet California’s stringent low-emissions truck idling requirements. With LNI, Volvo engines are certified to emit 30 gr/bhp-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.

Volvo’s certified LNI solution involves idling at a low speed (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, the company said. It also provides 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 noted.

The Cummins ISX diesel, which is available in some Volvo truck models, also meets the California NOx limits, Volvo said.