Issue link: https://read.dmtmag.com/i/26699
ENGINE SPO TLIGHT The Paccar MX is part of a three-engine series that includes the PX-6 and PX-8 medium-duty engines and the heavy-duty MX. Paccar, the owner of Peterbilt and Kenworth, also owns DAF, a European producer of diesel engines and trucks. The MX was originally developed to meet the Euro 4 and 5 emission standards and was then adapted for the U.S. market. It will be available only in Peterbilts and Kenworths. ENGINE INNOVATION Paccar’s MX stands out with unique design features. BY JOHN BAXTER close to full production at the company’s Columbus, Miss., manufacturing facility, has one unusual feature – fractured cap technology – that enhances this characteristic. The process involves splitting the main bearing mounts and connecting rods. When they are reassembled, the mating of their rough edges produces an alignment more precise and rigid than E very trucker places a high value on torque and an engine’s ability to pull hills without needing to shift. Paccar’s new MX, which is standard rods or main bearing mounts, which have smooth mating surfaces. The perfect alignment makes it possible to tune the engine to produce a “wide horsepower range and longer torque and power curves for more efficient operation,” according to the company. The technology also provides “improved bearing clearance, higher strength joints, increased uptime, and longer service life.” Paccar says the engine is the only one in the marketplace that uses compacted graphite iron in MARCH 2011 OVERDRIVE 47