Internal combustion engine with turbocharger
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0383564
(2010-09-29)
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등록번호 |
US-8607565
(2013-12-17)
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국제출원번호 |
PCT/JP2010/066924
(2010-09-29)
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§371/§102 date |
20120111
(20120111)
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국제공개번호 |
WO2012/042609
(2012-04-05)
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발명자
/ 주소 |
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출원인 / 주소 |
- Toyota Jidosha Kabushiki Kaisha
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
1 |
초록
▼
An internal combustion engine with a turbocharger that can favorably prevent an exhaust gas purifying catalyst from being clogged with a manganese oxide contained in an exhaust gas is provided. The internal combustion engine includes a turbocharger that includes a turbine disposed in an exhaust pass
An internal combustion engine with a turbocharger that can favorably prevent an exhaust gas purifying catalyst from being clogged with a manganese oxide contained in an exhaust gas is provided. The internal combustion engine includes a turbocharger that includes a turbine disposed in an exhaust passage, the turbine being operative by exhaust energy of the internal combustion engine; an upstream catalyst, disposed in the exhaust passage at a downstream side of the turbine, for purifying an exhaust gas; an exhaust bypass passage for bypassing the turbine; and a waste gate valve for opening or closing the exhaust bypass passage. The waste gate valve is controlled to be in an open state during performance of a fuel cut of the internal combustion engine.
대표청구항
▼
1. An internal combustion engine with a turbocharger, comprising: a turbocharger including a turbine disposed in an exhaust passage, the turbine being operative by exhaust energy of the internal combustion engine;an exhaust gas purifying catalyst, disposed in the exhaust passage at a downstream side
1. An internal combustion engine with a turbocharger, comprising: a turbocharger including a turbine disposed in an exhaust passage, the turbine being operative by exhaust energy of the internal combustion engine;an exhaust gas purifying catalyst, disposed in the exhaust passage at a downstream side of the turbine, for purifying an exhaust gas;an exhaust bypass passage for bypassing the turbine;a bypass valve for opening or closing the exhaust bypass passage;a bypass valve opening control unit for performing, if a fuel cut of the internal combustion engine is to be performed, during at least part of a period of time during which the fuel cut is performed, control to open the bypass valve or to make an opening angle of the bypass valve greater than an opening angle at a start of the fuel cut; anda catalyst temperature acquiring unit that detects or estimates a temperature of the exhaust gas purifying catalyst,wherein the bypass valve opening control unit performs the control to open the bypass valve or to make the opening angle of the bypass valve greater than the opening angle at the start of the fuel cut during the performance of the fuel cut and if the temperature of the exhaust gas purifying catalyst is higher than a first predetermined value. 2. An internal combustion engine with a turbocharger, comprising: a turbocharger including a turbine disposed in an exhaust passage, the turbine being operative by exhaust energy of the internal combustion engine;an exhaust gas purifying catalyst, disposed in the exhaust passage at a downstream side of the turbine, for purifying an exhaust gas;an exhaust bypass passage for bypassing the turbine;a bypass valve for opening or closing the exhaust bypass passage; andbypass valve opening control means for performing, if a fuel cut of the internal combustion engine is to be performed, during at least part of a period of time during which the fuel cut is performed, control to open the bypass valve or to make an opening angle of the bypass valve greater than an opening angle at a start of the fuel cut; andcatalyst temperature acquiring means for detecting or estimating a temperature of the exhaust gas purifying catalyst,wherein the bypass valve opening control means performs the control to open the bypass valve or to make the opening angle of the bypass valve greater than the opening angle at the start of the fuel cut during the performance of the fuel cut and if the temperature of the exhaust gas purifying catalyst is higher than a first predetermined value. 3. The internal combustion engine with a turbocharger according to claim 2, further comprising: bypass valve closing control means for performing, at a return from the fuel cut, control to close the bypass valve or to make the opening angle of the bypass valve smaller than the opening angle during the performance of the fuel cut. 4. The internal combustion engine with a turbocharger according to claim 2, wherein the bypass valve opening control means includes first returning-then-opening control performing means for performing the control to open the bypass valve or to make the opening angle of the bypass valve greater than the opening angle at the start of the fuel cut, if the temperature of the exhaust gas purifying catalyst is higher than a second predetermined value at the return from the fuel cut, the first returning-then-opening control performing means continuing performing the control until the temperature of the exhaust gas purifying catalyst is equal to, or less than, the second predetermined value. 5. The internal combustion engine with a turbocharger according to claim 2, further comprising: air fuel ratio control means for controlling an air fuel ratio of the internal combustion engine,wherein the bypass valve opening control means includes second returning-then-opening control performing means for performing the control to open the bypass valve or to make the opening angle of the bypass valve greater than the opening angle at the start of the fuel cut, if a rich air fuel ratio operation is to be performed with the air fuel ratio set to a side richer than a stoichiometric air fuel ratio by the air fuel ratio control means at the return from the fuel cut. 6. The internal combustion engine with a turbocharger according to claim 5, wherein the second returning-then-opening control performing means includes bypass valve closing control means for performing control to close the bypass valve or to make the opening angle of the bypass valve greater than the opening angle during the performance of the fuel cut, if a stoichiometric operation with the air fuel ratio set at the stoichiometric air fuel ratio is selected as changed from the rich air fuel ratio operation after the return from the fuel cut.
이 특허에 인용된 특허 (1)
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Michael Baeuerle DE; Klaus Ries-Mueller DE, Method and arrangement for checking catalytic converter heating measures in an internal combustion engine.
이 특허를 인용한 특허 (2)
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Ike, Daniel C., Bypass exhaust pathway to allow gases to bypass the start catalyst of a vehicle.
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Thalhauser, Josef; Perktold, Michael; Hirzinger-Unterrainer, Johann; Schaumberger, Herbert, Method of operating an internal combustion engine coupled to a generator.
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