Arrangement for recirculation of exhaust gases of a supercharged internal combustion engine
AssigneeScania CV AB (publ)
InventorsZoltan Kardos, Hans Wikström
Life of this patent
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Abstract
The present invention relates to an arrangement for recirculation of exhaust gases of a supercharged combustion engine. The arrangement comprises an exhaust line intended to lead exhaust gases out from the combustion engine, an inlet line intended to lead air to the combustion engine, a compressor adapted to compressing the air in the inlet line to above atmospheric pressure, and return line which connects the exhaust line to the inlet line. The arrangement comprises an EGR cooler in which the recirculating exhaust gases in the return line are cooled by the air in a portion of the inlet line which is situated upstream of the compressor with respect to the direction of flow of the air in the inlet line.
Claims7
An arrangement for recirculation of exhaust gases of a supercharged combustion engine block, the arrangement comprising:
- an exhaust line configured and operative to lead exhaust gases out from the combustion engine;
- an inlet line configured and operative to lead air to the combustion engine, the inlet line comprising a first inlet line portion having a beginning at a vehicle fresh air intake point and terminating at a compressor, the first inlet line portion positioned upstream of the compressor with respect to the direction of flow of the air in the inlet line;
- the compressor configured and operative to compress the air in the inlet line to above atmospheric pressure;
- a return line which connects the exhaust line to the inlet line, the return line being configured and operative to recirculate exhaust gases from the exhaust line to the inlet line;
- a first Exhaust Gas Recirculation (EGR) cooler configured and operative to subject the recirculating exhaust gases in the return line to a first step of cooling by a liquid coolant flowing through the combustion engine block;
- and
- a second EGR cooler configured and operative to cool the recirculated exhaust gases in the return line by the air in the first inlet line portion of the inlet line.
Dependencies are inferred from the claim text.