GHG Regulations Drive Engine, Trailer Development
This story appears in the March 13 print edition of Equipment & Maintenance Update, a supplement to Transport Topics.
The effect of current and future emissions regulations on the trucking industry, particularly those for engines and trailers, are examined in two stories in this issue of Equipment & Maintenance Update.
Diesel engines built this year are more efficient, which is a result of the second step of greenhouse-gas Phase 1 standards set by the Environmental Protection Agency and the National Highway Traffic Safety Administration. Contributing writer John Baxter reports that these engines also offer improved reliability, reduced maintenance and performance improvements.
New diesels used in heavy-duty tractors must consume, in a particular duty cycle, 15 fewer grams per horsepower-hour of diesel fuel, a savings of 3.08%, he reports.
BEST OF MARCH E&MU: More stories, columns
Advances in engineering also are showcased in these latest power plants.
For example, Tim Proctor, technical leader for heavy-duty products at Cummins Inc., described changes in the new version of its 15-liter platform, the X15. The Efficiency Series version of that engine includes the “Atkinson cycle,” which ultimately means that this 15-liter engine behaves like a smaller engine in terms of breathing, while taking advantage of its larger cylinders to provide more expansion of the hot gases, converting more cylinder pressure into horsepower, Baxter reports.
The biggest change in Volvo’s and Mack’s 2017 engines? The Wave piston, said John Moore, powertrain product marketing manager at Volvo. Among the key benefits is that soot is reduced by 90%, and this piston allows the companies to increase their engines’ efficiency, the story reports.
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|By Fran Matso Lysiak|
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