Arrangement For Recirculation Of Exhaust Gases Of A Super-Charged Internal Combustion Engine
First Claim
1. An arrangement for recirculation of exhaust gases of a supercharged combustion engine, wherein the arrangement comprises an exhaust line from the engine operable to lead exhaust gases out from the combustion engines an inlet line to the engine and operable to lead air at above atmospheric pressure to the combustion engine;
- a return line which connects the exhaust line to the inlet line, and the return line is operable to recirculate exhaust gases from the exhaust line to the inlet line, a first cooling system operable for cooling the exhaust gases in the exhaust line by means of a first coolant, the first cooling system comprising a first EGR cooler in which the recirculating exhaust gases in the return line are cooled, as a first step, by the first coolant in the first cooling system;
a second cooling system comprising a second EGR cooler in which the recirculating exhaust gases in the return line are cooled, as a second step, by a second coolant and the second cooling system is operable to cause the second coolant to be at a temperature substantially corresponding to the temperature of the surroundings of the engine when the second coolant is led into the second EGR cooler.
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Accused Products
Abstract
An arrangement for recirculation of exhaust gases of a supercharged combustion engine. A return line which connects an engine exhaust line to an air inlet line for air supply to the combustion engine, to recirculate exhaust gases via the return line. A first EGR cooler in which the recirculating exhaust gases in the return line are cooled, as a first step, by a first coolant in a first cooling system. A second EGR cooler in which the recirculating exhaust gases in the return line are cooled, as a second step, by a second coolant in a second cooling system, and the second coolant is adapted to be at a temperature substantially corresponding to the temperature of the ambient surroundings when it is led into the second EGR cooler. A charge air cooler for the inlet line, a radiator for the second cooling system to cool the exhaust gases and a radiator element for cooling the second coolant.
31 Citations
20 Claims
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1. An arrangement for recirculation of exhaust gases of a supercharged combustion engine, wherein the arrangement comprises an exhaust line from the engine operable to lead exhaust gases out from the combustion engines
an inlet line to the engine and operable to lead air at above atmospheric pressure to the combustion engine; -
a return line which connects the exhaust line to the inlet line, and the return line is operable to recirculate exhaust gases from the exhaust line to the inlet line, a first cooling system operable for cooling the exhaust gases in the exhaust line by means of a first coolant, the first cooling system comprising a first EGR cooler in which the recirculating exhaust gases in the return line are cooled, as a first step, by the first coolant in the first cooling system;
a second cooling system comprising a second EGR cooler in which the recirculating exhaust gases in the return line are cooled, as a second step, by a second coolant and the second cooling system is operable to cause the second coolant to be at a temperature substantially corresponding to the temperature of the surroundings of the engine when the second coolant is led into the second EGR cooler. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification