The only truck maker that won’t be using selective catalytic reduction (SCR) technology to meet 2010 federal emission requirements will wrap up its final validation phase testing this summer. Navistar, which instead will use exhaust gas recirculation engine technology, said its recent tests included cold-weather testing in northern Minnesota. The final validation phase testing will take place at high altitude and high temperature. Its EGR technology will also be put through the test in the desert-like conditions of Arizona and Nevada for its hot-weather testing phase.

Navistar Inc. said it has completed 18 months of laboratory and field tests of its “advanced” version of exhaust gas recirculation engine technology that will be used to meet 2010 federal emission requirements.

“We are on track with our strategy of 2010 emissions compliance through the use of our [EGR]-only solution and are ahead of schedule in some cases,” Jack Allen, president of Navistar’s North American truck group, said in a statement issued July 13.

Navistar, the only truck maker that will meet the 2010 rules with EGR, said the tests included “cold-weather testing in northern Minnesota.”

Company spokesman Roy Wiley told Transport Topics he could not say when Navistar planned to submit the engine for certification to the U.S. Environmental Protection Agency.

Navistar said the next phase of “final validation testing” will take place “at high altitude and high temperature.”

“Now that the warm summer months are here, Navistar engineers will travel to desert-like conditions in Arizona and Nevada to complete its 2010 hot weather testing,” the statement said. “Navistar has more than 60 test vehicles in operation today, logging thousands of miles each and every week.”

All other engine makers will reduce nitrogen oxide in the aftertreatment using selective catalytic reduction. The SCR manufacturers have also said that their vehicles are undergoing rigorous testing.

[source - ttnews.com]