There’s a new crop of engines on the street now that’s cleaner, more fuel efficient and hopefully more reliable than previous models. Most North American heavy-duty diesel engine manufacturers rolled ...

Heavy-duty trucks account for a quarter of U.S. on-road vehicle energy consumption, despite representing only 1 percent of on-road vehicles. They also burn highly polluting diesel fuels and ...

Technologies for reducing fuel consumption of medium-and heavy-duty vehicles depend on the power train type. For instance, replacing gasoline engines with diesel engines in medium-duty trucks is a ...