Cat® machines are rolling off assembly lines with the latest in engine technology. The first model to ship was the D8T. Several other models followed suit including the D9T, 365, 385, and four Articulated Trucks. As of the end of April, a total of 26 machine models are available! Each of these machines use Caterpillar engines with ACERT™ Technology, the result of more than $500 million in research and development and more than 250 patents. The engines are compliant with the United States EPA Tier 3 emissions regulations governing off-road machines, which took effect January 1, 2005 for engines of 300 to 750 horsepower.
ACERT Technology is another example of why Caterpillar continues to be the North American leader in on-highway engines. Truck engines with ACERT Technology log more than 70 million miles each day. In fact, Caterpillar factories ship more than 16,000 of those engines each month. That on-highway record, coupled with Caterpillar's decades of experience in the off-road business, means customers will continue to receive the ultimate in engine performance and machine production.
Emissions regulations for machine engines are not new. The first went into effect in 1996, and Tier 2 regulations were applied in 2001. Those standards were met by adapting existing technologies, but the aggressive Tier 3 requirements dictated breakthroughs.