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A comment on GM accused of installing devices in diesel trucks to beat emissions tests. Parent comment

Re:GM accused of installing devices in diesel trucks to beat... by rosbrith on Friday May 26, 2017 @04:03AM (#14422632)
This replicates the functioning of a carburettor equipped with a mechanical accelerator pump. It squirts some extra fuel into the manifold when the throttle pedal is depressed, the quantity determined by the force applied to the pedal.
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Re:GM accused of installing devices in diesel trucks to beat... by jcoby on Friday May 26, 2017 @08:40AM (#14423604)
What you're describing is called accelerator enrichment and does mirrror the accel pump in a carb. https://www.hptuners.com/help/vcm_editor_parameters_gm_eng_f...

Power enrichment is a different function and commands a new afr for peak power (generally around 12.5:1) instead of trying to maintain around stoich.

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