The California Air Resources Board has granted Navistar International Corp. permission to continue to sell new heavy-duty truck engines in the state as long as the company still has enough credits to offset their engines’ noncompliance with federal emissions standards.
CARB previously had notified Navistar the company’s emissions credits for the MaxxForce 13 would expire Feb. 29. Annette Hebert, chief of CARB’s mobile source operations division, told the Wall Street Journal the agency will allow Navistar to sell engines in California as long as the company still has emissions credits. “Once they’re out of credits, they can’t,” Hebert told the paper.
Most diesel engine manufacturers chose to use selective catalytic reduction aftertreatment technology to meet the required emissions levels. Navistar diesel engines use an in-cylinder exhaust gas recirculation technology to reduce exhaust emissions; the company is the only North American engine manufacturer using that technology.
Currently, Navistar diesel engines emit more grams of nitrogen oxide than their competitors’ engines. But because Navistar exceeded the performance parameters set for earlier emissions reduction regulations, the company was awarded emissions credits by the U.S. Environmental Protection Agency.
According to the WSJ, CARB’s decision gives Navistar more time while its latest engines are evaluated by the agency and EPA for emissions compliance. Navistar has submitted its MaxxForce 13 diesel engine to EPA for compliance testing, the company said Feb. 1.