When you make a claim as a manufacturer, you always hope your product stands up to customer expectations. More often than not in the car and light-truck market, the stories are of fuel economy not meeting expectations or falling short of the EPA sticker claims. Although Class 8 trucks aren't rated for fuel-economy numbers by the EPA, fuel consumption on these trucks is still a closely watched attribute and a major factor in operating costs for the truck. Volvo has been a leader in developing more efficient engines, powertrains, and technology and used the 2014 Mid America Trucking Show as an opportunity to announce that its new Greenhouse Gas 2014-certified engines are even more efficient than had been previously announced.
The addition of SCR catalyst systems improved fuel efficiency by 5 percent over non-SCR engines, and the new engines have yielded an additional 3-percent savings. Volvo had previously announced the new engines showed a 2-percent improvement during initial testing. The upgraded engines feature redesigned pistons, liners and oil-scraper rings, a clutched air compressor that disengages from the engine when not in use, new seven-hole fuel injectors for more precise fuel atomization, and an improved crankcase ventilation system that reduces engine back pressure and filters more oil from blow-by gases.
For those operators wanting even more miles per gallon out of their rigs, Volvo offers an XE (exceptional efficiency) package that downspeeds the engine an additional 200 rpm on models equipped with Volvo's I-Shift automated manual transmission. Volvo claims up to an additional 3-percent efficiency improvement on XE models. The XE package is available on Volvo's 11-, 13-, and 16-liter engines.
Source: Volvo Trucks