Operators with vehicles that utilise exhaust gas recirculation (EGR) to achieve emission limits can benefit from Hella’s decision to include EGR coolers in its extensive aftermarket range.
Few Euro 6 engines used in coaches and buses lack EGR. The cooling of a proportion of exhaust gas prior to its return to the combustion chamber is achieved by a unit that acts as a heat exchanger with the engine coolant.
Through that cooling, the combustion temperature in the engine drops, reducing its NOx production.
