Not all braking systems on semis have to be loud to be effective. Exhaust brakes make a fraction of the noise that compression brakes do, here's how they work.

Are you thinking about doing an EGR delete on your truck? Before you do, it's important to know the legal and performance ...

Additives in premium diesel fuel help reduce fouling of the EGR valve, EGR cooler and turbocharger. A typical #2 diesel can burn incompletely and leave deposits.

EGR works by circulating cooled exhaust gas back into the engine air intake. This lowers combustion temperature and reduces formation of nitrogen oxide (NOx). The 2007 EPA requirements call for ...

Though most diesel engines lack throttle bodies, they do employ similar components. For instance, some modern diesel engines incorporate throttle valves in exhaust gas recirculation (EGR) systems ...

Previous studies have indicated that multiple injections with EGR can provide substantial simultaneous reductions in emissions of particulate and NOx from heavy-duty diesel engines, but careful ...