This component dilutes the flame-supporting oxygen in the cylinder with injected (inert) exhaust, which slows combustion and therefore avoids NOx-creating temperature spikes.

• 这种装置可注入活性较低的废气，稀释汽缸中促进燃烧的氧，降低燃烧速率，避免可能产生氮氧化物的温度陡升现象。