Controlling charge air cooler condensation by using heated intake air
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-029/04
F02D-041/00
F02D-037/02
F02M-035/10
F02M-035/108
F02M-025/07
출원번호
US-0711312
(2012-12-11)
등록번호
US-9115658
(2015-08-25)
발명자
/ 주소
Glugla, Chris Paul
Jahr, Ken
출원인 / 주소
Ford Global Technologies, LLC
대리인 / 주소
Voutyras, Julia
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
Methods and systems are provided for adjusting the temperature of intake air entering an engine. In response to condensate in a charge air cooler and engine operating conditions, the position of an induction valve is adjusted to draw in air from a warm or cool air duct. Induction valve operation is
Methods and systems are provided for adjusting the temperature of intake air entering an engine. In response to condensate in a charge air cooler and engine operating conditions, the position of an induction valve is adjusted to draw in air from a warm or cool air duct. Induction valve operation is further controlled to reduce fuel economy losses.
대표청구항▼
1. An engine method, comprising: adjusting a fresh air source position of intake air drawn into an induction system of an engine upstream of a compressor responsive to a determined amount of condensate in of a charge air cooler. 2. The method of claim 1, wherein the determined amount of condensate i
1. An engine method, comprising: adjusting a fresh air source position of intake air drawn into an induction system of an engine upstream of a compressor responsive to a determined amount of condensate in of a charge air cooler. 2. The method of claim 1, wherein the determined amount of condensate in the charge air cooler is greater than zero and wherein the adjusting is further responsive to one or more of an engine knock indication, a throttle body icing condition, engine temperature, and engine load, where the engine knock indication includes whether spark timing is within a threshold of a borderline limit or an amount of retard from MBT timing, and wherein the fresh air source position of intake air drawn into the induction system is further positioned upstream of an air cleaner. 3. The method of claim 2, wherein the adjusting includes adjusting a position of an induction valve, the induction valve positioned at an entrance to the induction system, upstream of the compressor. 4. The method of claim 3, wherein when the induction valve is in a first position, warmed intake air is drawn from under a hood of a vehicle to the entrance of the induction system. 5. The method of claim 3, wherein when the induction valve is in a second position, intake air is drawn with less warming than in the first position from air entering from outside a vehicle in which the engine is installed to the entrance of the induction system. 6. The method of claim 4, wherein the induction valve is adjusted into the first position, responsive to each of the amount of condensate in the charge air cooler above a first threshold level and engine temperature below a threshold temperature, where the first threshold level is greater than zero. 7. The method of claim 6, wherein engine temperature below the threshold temperature includes an engine warm-up period from an engine cold start condition. 8. The method of claim 6, wherein the induction valve is adjusted into the first position further responsive to an idle condition. 9. The method of claim 6, further comprising adjusting the induction valve into the first position responsive to fuel economy losses due to spark retard nearing the borderline knock limit from MBT spark timing being less than a pumping loss benefit of warmer air. 10. The method of claim 5, wherein the induction valve is adjusted into the second position, responsive to spark timing with the threshold of the borderline knock limit from MBT spark timing. 11. The method of claim 3, wherein the induction valve is a single valve, movable between a first and a second position. 12. The method of claim 11, wherein the induction valve is movable into an intermediate position, between the first and the second position. 13. The method of claim 12, wherein when the induction valve is in the intermediate position, a mixture of warmer and cooler air is drawn into the induction system. 14. The method of claim 12, further comprising adjusting the induction valve between the first, the second, and the intermediate position based on feedback of a measured induction air temperature. 15. The method of claim 14, wherein the adjusting the induction valve based on measured induction air temperature further includes determining threshold temperatures based on pumping friction and borderline spark retard from MBT spark. 16. An engine method, comprising: responsive to an increase in a determined amount of condensate in a charge air cooler over a non-zero threshold level, drawing warmed intake air into an induction system upstream from a compressor;responsive to one or more of a decrease in the amount of condensate in the charge air cooler below the non-zero threshold level, and potential for engine knock, drawing less warmed intake air, relative to the warmed intake air, into the induction system upstream from the compressor. 17. The method of claim 16, further comprising, responsive to engine temperature below a threshold temperature, drawing warmed intake air into the induction system upstream from the compressor. 18. The method of claim 16, wherein the warmed intake air is drawn from underneath a vehicle hood, adjacent to an exhaust manifold. 19. The method of claim 16, wherein the less warmed intake air is drawn from an external air flow from outside a vehicle, the external air flow including ambient air, and where the external air flow from outside the vehicle is further away from an exhaust manifold than from where the warmed intake air is drawn. 20. An engine system of a vehicle, comprising: an engine including an intake manifold and an exhaust manifold;a turbocharger including a compressor;an induction system, the induction system including a first air duct for drawing warmed air from underneath a hood, adjacent the exhaust manifold, into an entrance of the induction system positioned upstream of the compressor, a second air duct for drawing cooler air from another location further from the exhaust manifold into the entrance of the induction system, and an induction valve positioned at the entrance of the induction system upstream of the compressor for adjusting a location from which intake air is drawn into the entrance of the induction system;a charge air cooler downstream of the induction valve;an intake throttle downstream of the charge air cooler and upstream of the intake manifold; anda controller with computer readable instructions for adjusting a position of the induction valve to control a temperature of the intake air passing through the charge air cooler and into the intake manifold responsive to engine temperature, a determined amount of condensate in the charge air cooler, engine load, throttle body icing, pumping losses, and a borderline knock limit, where the determined amount of condensate is an amount greater than zero.
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이 특허에 인용된 특허 (10)
Yang Jialin, Air-fuel charge controller for a homogeneous-charge, compression-ignition engine.
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