Diesel trucks with DPFs account for 28% of all trucks on US highways
25 June 2013
More than 28% of all trucks registered in the United States—2.5 million of 8.6 million trucks—are now equipped with diesel particulate filters (DPF), according to data compiled by R.L. Polk for the Diesel Technology Forum (DTF).
The Polk data includes registration information on Class 3-8 trucks from 2007 through 2012 in all 50 states and the District of Columbia. Since 2007, all heavy-duty diesel trucks have to meet a PM emission standard of 0.01 g/bhp-hr (down from the 1994 limit of 0.1 g/bhp-hr). All diesel engine manufacturers have been using diesel particulate filters to meet this emission limit.
From 2010, heavy-duty diesel engines must also meet a strict NOx emission limit of 0.20 g/bhp-hr. This NOx emission requirement has triggered the introduction of urea-SCR aftertreatment on heavy-duty diesel engines, a technology now used by all engine manufacturers.
According to the Polk data, the US Midwest has the highest percent of 2007 and newer diesel trucks (31%), followed by the South (29.8%), the Northeast (29.1%), and the West (26.0%).
The top 10 states with new technology diesel trucks by 2012 percentage include:
- Indiana—44.0%
- Utah—43.0%
- Oklahoma—37.0%
- Wyoming—36.9%
- Texas—36.6%
- Nebraska—34.0%
- Louisiana—33.1%
- Maryland—32.9%
- Pennsylvania—32.8%
- Montana—32.7%
The top 10 states with new technology diesel trucks by 2012 total are:
- Texas—286,045
- Indiana—169,509
- California—168,965
- Illinois—115,125
- Pennsylvania—113,020
- New York—97,073
- Florida—91,672
- Ohio—88,671
- North Carolina—72,286
- Georgia—71,136
Source: Diesel Technology Forum