Technologies -> 4-way Diesel Systems

Integrated systems for CO, HC, PM and NOx control from diesel engines

The most effective 4-way systems are those that successfully integrate two components, in which they work together rather than as two separate systems. Such systems are usually built from:

a diesel particulate filter such as a CRT® system, incorporating an oxidation catalyst, to control CO, HC and PM, and

a NOx control catalyst, either SCR or NAC.

There are two main categories of integrated 4-way system, defined by the NOx reduction system that they employ: SCRT® systems and NAC + DPF systems.