![background image](/i/mitsubishi/156132/mitsubishi-spacegear-1997/h/mitsubishi-spacegear-1997-042.png)
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engine.
[5]
The inert gas (exhaust) has of course been generated by the engine.
[6]
The Engine responds to inert gas. Oxygen concentration is decreased by
addition of inert gas, resulting in lower combustion temperature, and thus less
NOx.
The accompanying IDEF0 diagram shows how the system works.