EGR Cooling System with Multiple EGR Coolers

Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture

Reexamination Certificate

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Details

C060S605200

Reexamination Certificate

active

07461641

ABSTRACT:
An EGR cooling system is provided. The EGR cooling system comprising a plurality of EGR coolers configured to cool the EGR to a plurality of successively lower temperatures, where at least one of the plurality of EGR coolers includes a finned EGR cooler that comprises a plurality of channels for dissipating heat in the EGR, the plurality of channels increasing heat transfer surface area while having sufficient fin spacing to avoid clogging. The EGR cooling system may further comprise a catalyst configured to remove particle matters and/or hydrocarbons from the EGR, the catalyst positioned upstream of at least one of the plurality of EGR coolers.

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