METHOD FOR COOLING AN INTERNAL COMBUSTION ENGINE HAVING EXHAUST GAS RECIRCULATION AND CHARGE AIR COOLING
First Claim
1. A method of cooling charge air from a turbo- or supercharger and exhaust gas recirculated from an exhaust gas recirculation valve in an internal combustion engine comprising:
- providing a radiator for air cooling of liquid engine coolant from the internal combustion engine;
providing charge air and exhaust gas heat exchanger units disposed in parallel with respect to ambient air flow, the charge air heat exchanger unit having aluminum tubes and fins for air cooling the charge air, and the exhaust gas heat exchanger unit having tubes and fins made of a material resistant to higher operating temperatures than aluminum for air cooling the exhaust gas, the charge air heat exchanger and the exhaust gas heat exchanger units each being disposed adjacent a face of the radiator downstream of the radiator with respect to ambient air flow to permit ambient air to flow in series first through the radiator and subsequently through the charge air and exhaust gas heat exchanger units;
flowing ambient air in series first through the radiator and subsequently through the charge air heat exchanger unit without flowing such air through the exhaust gas heat exchanger unit and flowing ambient air in series first through the radiator and subsequently through the exhaust gas heat exchanger unit without flowing such air through the charge air heat exchanger unit;
passing the charge air from the turbo- or supercharger through the charge air heat exchanger unit to cool the charge air;
passing the exhaust gas from the exhaust gas recirculation valve through the exhaust gas heat exchanger unit to cool the exhaust gas; and
combining the cooled charge air and cooled exhaust gas for passage into an intake manifold on the engine.
6 Assignments
0 Petitions
Accused Products
Abstract
A system for cooling charge air from a turbo- or supercharger and exhaust gas recirculated from an exhaust gas recirculation valve in an internal combustion engine. The system includes a radiator and parallel charge air and exhaust gas heat exchanger units, the charge air heat exchanger unit having aluminum tubes and fins for air cooling the charge air, and the exhaust gas heat exchanger unit having stainless steel tubes and fins. The charge air heat exchanger and the exhaust gas heat exchanger units are each disposed adjacent the radiator, on the same or opposite sides. Alternatively, there is provided a pair of combined charge air cooler and exhaust gas cooler heat exchanger units, with a first heat exchanger unit having stainless steel tubes and fins, and a second heat exchanger unit having aluminum tubes and fins. The heat exchanger units are disposed on opposites sides of the radiator.
10 Citations
35 Claims
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1. A method of cooling charge air from a turbo- or supercharger and exhaust gas recirculated from an exhaust gas recirculation valve in an internal combustion engine comprising:
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providing a radiator for air cooling of liquid engine coolant from the internal combustion engine; providing charge air and exhaust gas heat exchanger units disposed in parallel with respect to ambient air flow, the charge air heat exchanger unit having aluminum tubes and fins for air cooling the charge air, and the exhaust gas heat exchanger unit having tubes and fins made of a material resistant to higher operating temperatures than aluminum for air cooling the exhaust gas, the charge air heat exchanger and the exhaust gas heat exchanger units each being disposed adjacent a face of the radiator downstream of the radiator with respect to ambient air flow to permit ambient air to flow in series first through the radiator and subsequently through the charge air and exhaust gas heat exchanger units; flowing ambient air in series first through the radiator and subsequently through the charge air heat exchanger unit without flowing such air through the exhaust gas heat exchanger unit and flowing ambient air in series first through the radiator and subsequently through the exhaust gas heat exchanger unit without flowing such air through the charge air heat exchanger unit; passing the charge air from the turbo- or supercharger through the charge air heat exchanger unit to cool the charge air; passing the exhaust gas from the exhaust gas recirculation valve through the exhaust gas heat exchanger unit to cool the exhaust gas; and combining the cooled charge air and cooled exhaust gas for passage into an intake manifold on the engine. - View Dependent Claims (2, 3, 4, 10, 11, 13, 14, 15)
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5-9. -9. (canceled)
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12. (canceled)
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16-28. -28. (canceled)
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29. A system for cooling charge air from a turbo- or supercharger and exhaust gas recirculated from an exhaust gas recirculation valve in an internal combustion engine comprising:
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a radiator for air cooling of liquid engine coolant from the internal combustion engine; charge air and exhaust gas heat exchanger units disposed in parallel with respect to ambient air flow, the charge air heat exchanger unit having aluminum tubes and fins for air cooling the charge air, and the exhaust gas heat exchanger unit having tubes and fins made of a material resistant to higher operating temperatures than aluminum for air cooling the exhaust gas, the charge air heat exchanger and the exhaust gas heat exchanger units each being disposed adjacent a face of the radiator downstream of the radiator with respect to ambient air flow to permit ambient air to flow in series first through the radiator and subsequently through the charge air heat exchanger unit without such flowing through the exhaust gas heat exchanger unit and to permit ambient air to flow in series first through the radiator and subsequently through the exhaust gas heat exchanger unit without such air flowing through the charge air heat exchanger unit; a line for carrying charge air from the turbo- or supercharger to the charge air heat exchanger unit to cool the charge air; a line for carrying the exhaust gas from the exhaust gas recirculation valve to the exhaust gas heat exchanger unit to cool the exhaust gas; and a line for combining the cooled charge air and cooled exhaust gas for passage into an intake manifold on the engine. - View Dependent Claims (33, 34, 35)
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30-32. -32. (canceled)
Specification