FIELD: engines and pumps.
SUBSTANCE: way the engine works (10) contains the adjustment of the amount of EGR supplied to the motor (10), in response to the amount of NH3, accumulated inside the SCR catalytic converter (70), and the amount of urea stored in the tank (91). Variants of the way the engine works are also disclosed.
EFFECT: reducing engine emissions and improving fuel economy.
20 cl, 6 dwg
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