IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0163529
(2014-01-24)
|
등록번호 |
US-9739194
(2017-08-22)
|
우선권정보 |
DE-10 2013 203 643 (2013-03-04) |
발명자
/ 주소 |
- Kuske, Andreas
- Sommerhoff, Franz Arnd
- Quix, Hans Guenter
|
출원인 / 주소 |
- Ford Global Technologies, LLC
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
6 |
초록
▼
Methods and systems are provided for a charge air cooling system of an engine. In one example, a turbocharger arrangement includes an internal combustion engine, a turbocharger for supercharging the internal combustion engine, a charge-air intercooler located in an intake tract between the turbochar
Methods and systems are provided for a charge air cooling system of an engine. In one example, a turbocharger arrangement includes an internal combustion engine, a turbocharger for supercharging the internal combustion engine, a charge-air intercooler located in an intake tract between the turbocharger and the internal combustion engine, and an auxiliary cooling system including a first feed line for supplying a first coolant to the charge-air intercooler, the first feed line positioned upstream of the charge-air intercooler and downstream of a cooling element, the first feed line including a heat recovery element. The heat recovery element may exchange heat between the first coolant and a heat transfer medium, the heat transfer medium including one of engine coolant or exhaust gas.
대표청구항
▼
1. A turbocharger arrangement, comprising: an engine;a turbocharger for supercharging the engine;a charge-air intercooler located in an intake tract between the turbocharger and the engine;an auxiliary cooling system including a first feed line for supplying a first coolant to the charge-air interco
1. A turbocharger arrangement, comprising: an engine;a turbocharger for supercharging the engine;a charge-air intercooler located in an intake tract between the turbocharger and the engine;an auxiliary cooling system including a first feed line for supplying a first coolant to the charge-air intercooler, the first feed line positioned upstream of the charge-air intercooler and downstream of a low-temperature cooler, the first feed line including a heat exchanger;a temperature sensor coupled to a coolant exit housing of the engine configured to indicate a temperature of the first coolant supplied to the charge-air intercooler;a bypass passage coupled to the first feed line and configured to deliver the first coolant around the heat exchanger such that the first coolant in the bypass passage avoids the heat exchanger;a valve disposed in the bypass passage; anda controller with computer-readable instructions stored in non-transitory memory for: in response to the temperature of the first coolant being below a dew point, closing the valve to direct the first coolant through the heat exchanger; andin response to the temperature of the first coolant being higher than a threshold temperature, increasing cooling of the first coolant by opening the valve to divert the first coolant around the heat exchanger, the threshold temperature being an upper threshold indicating unstable combustion. 2. The turbocharger arrangement of claim 1, wherein the heat exchanger exchanges heat between the first coolant and a heat transfer medium, the heat transfer medium including one of engine coolant or exhaust gas, and wherein the dew point is a temperature at which water contained in charge air compressed by the turbocharger condenses, the dew point determined based on one or more of a charge air temperature, a charge air intercooler pressure, or a charge air humidity. 3. The turbocharger arrangement of claim 1, wherein a second coolant from a main cooling system is fed to the heat exchanger, a second feed line branching off from a bypass avoiding a main radiator and leading to the heat exchanger, a return line carrying the second coolant drawn from the bypass from the heat exchanger to a thermostat. 4. The turbocharger arrangement of claim 1, wherein the controller includes further instructions for: in response to the temperature of the first coolant being above the dew point, opening the valve to direct the first coolant through the bypass passage. 5. The turbocharger arrangement of claim 3, wherein the heat exchanger is a coolant-coolant heat exchanger. 6. The turbocharger arrangement of claim 1, wherein exhaust gases of the engine are fed into the heat exchanger. 7. The turbocharger arrangement of claim 6, wherein the heat exchanger is a gas-coolant heat exchanger. 8. A cooling system of an engine, comprising: a charge-air intercooler arranged between a turbocharger and the engine;a main cooling system including a coolant pump for circulating a first coolant to the engine;an auxiliary cooling system including an auxiliary pump, a low-temperature cooler and a heat exchanger for circulating a second coolant to the charge-air intercooler;a first coolant inlet line having a first control element and coupled between a bypass and the heat exchanger, the first coolant inlet line configured to circulate the first coolant from the bypass to the charge-air intercooler, the bypass emerging from an exhaust housing leading to a thermostat, the first control element upstream of the heat exchanger;a second coolant inlet line coupling the low-temperature cooler to the heat exchanger, the heat exchanger arranged in the first coolant inlet line and the second coolant inlet line upstream of the charge-air intercooler and downstream of the low-temperature cooler;a bypass passage coupled to the second coolant inlet line having a second control element, the bypass passage configured to deliver the second coolant around the heat exchanger such that the second coolant in the bypass passage avoids the heat exchanger;a branch line having a third control element and arranged between the exhaust housing of the engine and the heat exchanger for diverting a portion of exhaust gases from an exhaust path of the engine and to the heat exchanger, the third control element upstream of the heat exchanger; anda control unit with computer-readable instructions for: responsive to a first temperature condition being met, heating the second coolant circulating in the charge-air intercooler with exhaust gas; andresponsive to a second, different temperature condition being met, increasing cooling of the second coolant by activating the auxiliary pump to direct the second coolant through the low-temperature cooler, decreasing an opening of the third control element, increasing an opening of the second control element, and decreasing an opening of the first control element. 9. The cooling system of claim 8, further comprising a return line arranged between the heat exchanger and the exhaust housing for returning exhaust gases back to the exhaust path of the engine, and wherein the first temperature condition comprises a temperature of the second coolant being below a dew point temperature of charge air in the charge-air intercooler and wherein the second temperature condition comprises the temperature of the second coolant being above an upper threshold, the upper threshold indicating an unstable combustion condition. 10. The cooling system of claim 8, wherein the auxiliary cooling system is separated from the main cooling system so that the first coolant is not mixed with the second coolant. 11. The cooling system of claim 8, wherein the heat exchanger is a gas-coolant heat exchanger. 12. The cooling system of claim 8, wherein the auxiliary pump arranged in the auxiliary cooling system is arranged upstream of the low-temperature cooler. 13. A method, comprising: while a temperature of a coolant supplied to a charge-air intercooler is below a dew point, heating the coolant supplied to the charge-air intercooler with exhaust gases by flowing the coolant through a heat exchanger while also flowing exhaust gases through the heat exchanger,wherein the heat exchanger is arranged in a coolant line upstream of the charge-air intercooler and downstream of a low-temperature cooler,wherein the dew point is a dew point temperature of charge air flowing through the charge-air intercooler,wherein the dew point is determined based on one or more of a charge air temperature, a charge air intercooler pressure, or a charge air humidity, andwherein the temperature of the coolant is indicated based on an output of a temperature sensor mounted to an exit housing of an engine, andwhile the temperature of the coolant is higher than a threshold temperature, cooling the coolant supplied to the charge-air intercooler by decreasing exhaust gas flow through the heat exchanger, the threshold temperature being an upper threshold indicating unstable combustion. 14. The method of claim 13, wherein heating the coolant includes increasing heating supplied to the coolant by increasing an opening of a valve to increase flow of the exhaust gases through the heat exchanger, the valve positioned in a branch line upstream of the heat exchanger, the branch line directing exhaust gas from an exhaust path of the engine and to the heat exchanger; and further comprising, while the temperature of the coolant is above the dew point and below the threshold temperature, decreasing the opening of the valve to stop the flow of the exhaust gases through the heat exchanger. 15. The method of claim 13, wherein heating the coolant includes increasing heating supplied to the coolant by decreasing an opening of a valve to increase flow of the coolant through the heat exchanger, the valve positioned in a bypass line coupled to the coolant line and bypassing the heat exchanger; and further comprising, while the temperature of the coolant is above the dew point and below the threshold temperature, increasing the opening of the valve to decrease the flow of the coolant through the heat exchanger. 16. The method of claim 13, wherein heating the coolant includes activating an auxiliary pump to pump the coolant through the heat exchanger, the auxiliary pump positioned in a coolant return line between the charge-air intercooler and the low-temperature cooler. 17. The method of claim 13, wherein the heat exchanger is a gas-coolant heat exchanger with coolant flowing through a first side of the heat exchanger and exhaust gases flowing through a second side of the heat exchanger.
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