Apparatus for controlling an internal combustion engine having an exhaust gas turbocharger and an exhaust gas recirculation apparatus
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02D-023/00
F02M-025/07
출원번호
UP-0814233
(2006-03-28)
등록번호
US-7770392
(2010-08-30)
국제출원번호
PCT/EP2006/061107
(2006-03-28)
§371/§102 date
20070718
(20070718)
국제공개번호
WO06/106058
(2006-10-12)
발명자
/ 주소
Birkner, Christian
Schwarte, Anselm
출원인 / 주소
Continental Automotive GmbH
대리인 / 주소
King & Spalding L.L.P.
인용정보
피인용 횟수 :
6인용 특허 :
13
초록▼
A control apparatus for an internal combustion engine has an exhaust-gas turbocharger regulator which, as a function of a setpoint boost pressure and an actual boost pressure, determines a controlled actuating-variable exhaust-gas back-pressure. An exhaust-gas recirculation regulator determines, as
A control apparatus for an internal combustion engine has an exhaust-gas turbocharger regulator which, as a function of a setpoint boost pressure and an actual boost pressure, determines a controlled actuating-variable exhaust-gas back-pressure. An exhaust-gas recirculation regulator determines, as a function of a setpoint air mass flow and an actual air mass flow, a controlled actuating-variable exhaust-gas recirculation mass flow. A first decoupling unit determines a decoupling mass flow in an exhaust-gas section. A second decoupling unit determines a decoupling exhaust-gas back-pressure. A first conversion unit determines a signal for the exhaust-gas turbocharger actuator as a function of the pilot-control actuating-variable exhaust-gas back-pressure, the controlled actuating-variable exhaust-gas back-pressure and the decoupling mass flow. A second conversion unit determines a signal for the exhaust-gas recirculation valve as a function of the pilot-control actuating-variable exhaust-gas recirculation mass flow, the controlled actuating-variable exhaust-gas recirculation mass flow and the decoupling exhaust-gas back-pressure.
대표청구항▼
What is claimed is: 1. A method for controlling an internal combustion engine having at least one exhaust gas turbocharger with at least one exhaust gas turbocharger actuator, an exhaust gas recirculation device with an exhaust gas recirculation valve, wherein the method comprising the steps of: de
What is claimed is: 1. A method for controlling an internal combustion engine having at least one exhaust gas turbocharger with at least one exhaust gas turbocharger actuator, an exhaust gas recirculation device with an exhaust gas recirculation valve, wherein the method comprising the steps of: determining by an exhaust gas turbocharger controller a feedback control actuating variable exhaust gas back pressure as a function of a setpoint boost pressure and an actual boost pressure; determining by an exhaust gas recirculation controller a feedback control exhaust gas recirculation actuating variable, as a function of a setpoint mass air flow and an actual mass air flow; determining by a decoupling unit a decoupling mass flow in an exhaust gas tract downstream of a branch-off of the exhaust gas recirculation device which is dependent on the feedback control exhaust gas recirculation actuating variable, and determining by a conversion unit an actuating signal for the exhaust gas turbocharger actuator as a function of the feedback control actuating variable exhaust gas back pressure and the decoupling mass flow. 2. The method as claimed in claim 1, further comprising at least one of the steps of: determining by an exhaust gas turbocharger pilot control a pilot control actuating variable exhaust gas back pressure as a function of at least one operating variable of the internal combustion engine, and determining by an exhaust gas recirculation pilot control a pilot control actuating variable exhaust gas recirculation mass flow as a function of at least one operating variable of the internal combustion engine, wherein the actuating signal for the exhaust gas turbocharger actuator is additionally dependent on the pilot control actuating variable exhaust gas back pressure and the decoupling mass flow is additionally dependent on the pilot control actuating variable exhaust gas recirculation mass flow. 3. The method as claimed in claim 1, further comprising at least one of the steps of: determining by a second decoupling unit a decoupling exhaust gas back pressure, specifically as a function of a pilot control actuating variable exhaust gas back pressure and the feedback control actuating variable exhaust gas back pressure, and determining by an additional conversion unit an actuating signal for the exhaust gas recirculation valve as a function of a pilot control actuating variable exhaust gas recirculation mass flow, the feedback control actuating variable exhaust gas recirculation mass flow and the decoupling exhaust gas back pressure. 4. The method as claimed in claim 3, and further comprising: an estimated variable unit which includes a physical model of the internal combustion engine, wherein said physical model is embodied for determining an estimated value of the mass flow in the exhaust gas tract downstream of the branch-off, and as a function of at least one operating variable of the internal combustion engine, and wherein said physical model is also embodied for determining an estimated value of the exhaust gas back pressure as a function of at least one operating variable of the internal combustion engine, and wherein at least one of the decoupling unit embodied for determining the decoupling mass flow as a function of the estimated value of the mass flow in the exhaust gas tract downstream of the branch-off and the additional decoupling unit embodied for determining the decoupling exhaust gas back pressure as a function of the estimated value of the exhaust gas back pressure. 5. The method as claimed in claim 1, the feedback control exhaust gas recirculation actuating variable is a feedback control actuating variable exhaust gas recirculation mass flow. 6. A device for controlling an internal combustion engine having at least one exhaust gas turbocharger with at least one exhaust gas turbocharger actuator, an exhaust gas recirculation device with an exhaust gas recirculation valve, wherein the device comprises: an exhaust gas turbocharger controller which determines a feedback control actuating variable exhaust gas back pressure as a function of a setpoint boost pressure and an actual boost pressure; an exhaust gas recirculation controller which determines a feedback control exhaust gas recirculation actuating variable, as a function of a setpoint mass air flow and an actual mass air flow; a decoupling unit which determines a decoupling mass flow in an exhaust gas tract downstream of a branch-off of the exhaust gas recirculation device and is dependent on the feedback control exhaust gas recirculation actuating variable, and a conversion unit which determines an actuating signal for the exhaust gas turbocharger actuator as a function of the feedback control actuating variable exhaust gas back pressure and the decoupling mass flow. 7. The device as claimed in claim 6, wherein the device further comprises at least one of: an exhaust gas turbocharger pilot control which determines a pilot control actuating variable exhaust gas back pressure as a function of at least one operating variable of the internal combustion engine, and an exhaust gas recirculation pilot control which determines a pilot control actuating variable exhaust gas recirculation mass flow as a function of at least one operating variable of the internal combustion engine, wherein the actuating signal for the exhaust gas turbocharger actuator is additionally dependent on the pilot control actuating variable exhaust gas back pressure and the decoupling mass flow is additionally dependent on the pilot control actuating variable exhaust gas recirculation mass flow. 8. The device as claimed in claim 6, wherein the device further comprises at least one of: an additional decoupling unit which determines a decoupling exhaust gas back pressure, and specifically as a function of a pilot control actuating variable exhaust gas back pressure and the feedback control actuating variable exhaust gas back pressure, and an additional conversion unit which determines an actuating signal for the exhaust gas recirculation valve as a function of a pilot control actuating variable exhaust gas recirculation mass flow, the feedback control actuating variable exhaust gas recirculation mass flow and the decoupling exhaust gas back pressure. 9. The device as claimed in claim 8, and further comprising an estimated variable unit which includes a physical model of the internal combustion engine, wherein said physical model is embodied for determining an estimated value of the mass flow in the exhaust gas tract downstream of the branch-off, and as a function of at least one operating variable of the internal combustion engine, and wherein said physical model is also embodied for determining an estimated value of the exhaust gas back pressure as a function of at least one operating variable of the internal combustion engine, and wherein at least one of the decoupling unit embodied for determining the decoupling mass flow as a function of the estimated value of the mass flow in the exhaust gas tract downstream of the branch-off; and the additional decoupling unit embodied for determining the decoupling exhaust gas back pressure as a function of the estimated value of the exhaust gas back pressure. 10. The device as claimed in claim 8, wherein the additional decoupling unit comprises a high-pass filter by means of which a sum of the pilot control actuating variable exhaust gas back pressures and the feedback control actuating variable exhaust gas back pressure is filtered, and the second decoupling unit is embodied for determining the decoupling exhaust gas back pressure as a function of a filtered summation signal of the actuating variable exhaust gas back pressure. 11. The device as claimed in claim 10, wherein the additional decoupling unit is embodied for determining the decoupling exhaust gas back pressure as a function of the filtered summation signal of the actuating variable exhaust gas back pressure, weighted with a predefined weighting factor. 12. The device as claimed in claim 1, wherein the decoupling unit comprises a high-pass filter by means of which a sum of the pilot control actuating variable exhaust gas recirculation mass flow and the feedback control actuating variable exhaust gas recirculation mass flow is filtered, and the decoupling unit is embodied for determining the decoupling mass flow as a function of a filtered summation signal of the actuating variable exhaust gas recirculation mass flow. 13. The device as claimed in claim 12, wherein the decoupling unit is embodied for determining the decoupling mass flow as a function of the filtered summation signal of the actuating variable exhaust gas recirculation mass flow, weighted with a predefined weighting factor. 14. The device as claimed in claim 1, wherein the at least one exhaust gas turbocharger comprises: a turbine having variable turbine geometry, a turbine geometry actuator and a waste gate valve, wherein the conversion unit is embodied to generate an actuating signal for the turbine geometry actuator to vary a flow cross-section of the turbine up to a threshold value, and wherein the conversion unit is embodied for generating an actuating signal for the waste gate valve to vary a degree of opening of the waste gate valve if the threshold value is exceeded while maintaining the free flow cross-section of the turbine. 15. The device as claimed in claim 1, wherein the at least one exhaust gas turbocharger comprises first and second turbines arranged in series having a first and second actuator, respectively, wherein the conversion unit is embodied for generating an actuating signal to vary a degree of opening of the first actuator of the first turbine being disposed upstream of the second turbine, up to a threshold value, and wherein the conversion unit is embodied for generating an actuating signal to vary a degree of opening of the second actuator if the threshold value is exceeded, and while maintaining the degree of opening of the first actuator. 16. The device as claimed in claim 1, further comprising a throttle valve for assisting the exhaust gas recirculation flow. 17. The device in claim 1, wherein the feedback control exhaust gas recirculation actuating variable is a feedback control actuating variable exhaust gas recirculation mass flow.
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이 특허에 인용된 특허 (13)
Hanauer Horst (Althtte DEX) Khn Michael (Filderstadt DEX), Arrangement for controlling the boost pressure in an internal-combustion engine supercharged by an exhaust-gas turbochar.
Kolmanovsky IIya V. ; Van Nieuwstadt Michiel J. ; Moraal Paul Eduard,DEX, Control method and apparatus for turbocharged diesel engines having exhaust gas recirculation.
Kolmanovsky Ilya V. ; Van Nieuwstadt Michiel J. ; Moraal Paul Eduard,DEX, Control method for a variable geometry turbocharger in a diesel engine having exhaust gas recirculation.
Freudenberg James Scott ; Stefanopoulou Anna ; Kolmanovsky Iiya V., Coordinated control method for turbocharged diesel engines having exhaust gas recirculation.
Kolmanovsky Ilya V. ; Jankovic Mrdjan J. ; Van Nieuwstadt Michiel J. ; Moraal Paul Eduard,DEX, Method of estimating mass airflow in turbocharged engines having exhaust gas recirculation.
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