In one aspect an internal combustion engine assembly may be provided that may include at least one combustion chamber and an exhaust system with an after-treatment system that may have an oxidation catalyst and a particulate filter. The internal combustion engine assembly may include an electronic c
In one aspect an internal combustion engine assembly may be provided that may include at least one combustion chamber and an exhaust system with an after-treatment system that may have an oxidation catalyst and a particulate filter. The internal combustion engine assembly may include an electronic controller that may have a de-contamination function that may, responsive to a command be configured to de-contaminate the particulate filter and the oxidation catalyst. To that end, a method may be provided to, and the controller may be configured to increase the exhaust gas temperature at an inlet of the after-treatment system to above a de-contamination temperature during a certain time period.
대표청구항▼
1. An internal combustion engine assembly comprising: at least one combustion chamber;an exhaust system with an after-treatment system having an oxidation catalyst and a particulate filter;an electronic controller configured to detect a contamination condition of the oxidation catalyst and the parti
1. An internal combustion engine assembly comprising: at least one combustion chamber;an exhaust system with an after-treatment system having an oxidation catalyst and a particulate filter;an electronic controller configured to detect a contamination condition of the oxidation catalyst and the particulate filter, the contamination condition being different from a high soot loading in the particulate filter; andthe electronic controller having a de-contamination function that is, responsive to a command, configured to de-contaminate the particulate filter and the oxidation catalyst by increasing the exhaust gas temperature at an inlet of the after-treatment system to above a de-contamination temperature during a certain time period,wherein the electronic controller is configured to detect the contamination condition based on a detected discrepancy between an expected regeneration value and an actual soot loading level related parameter in the oxidation catalyst and the particulate filter. 2. The internal combustion engine assembly according to claim 1 including: a fuel supply system for introducing fuel into the at least one combustion chamber;a back pressure valve in the exhaust system;the de-contamination function of controller being configured to control a position of the back pressure valve for increasing the exhaust gas temperature at the inlet of the after-treatment system to above the de-contamination temperature. 3. The internal combustion engine according to claim 1, wherein the controller is configured to control at least one of the following parameters for increasing the exhaust gas temperature at the inlet of the after-treatment system to above the de-contamination temperature: a load of the engine;a speed of the engine;a position of an intake throttle valve;an intake pressure;a fuel supply to the combustion chamber including at least one of a fuel amount and a fuel injection timing;a waste gate valve position; andan EGR-valve position. 4. The internal combustion engine assembly according to claim 1, wherein the controller is configured to increase the exhaust gas temperature to above 400° C. 5. The internal combustion engine assembly according to claim 1, wherein the certain time is longer than about 6 minutes. 6. The internal combustion engine assembly according to claim 1, wherein the certain time is shorter than about 20 minutes. 7. The internal combustion engine assembly according to claim 1, wherein the electronic controller is configured to detect the contamination condition caused by wrong fuel used in the combustion engine. 8. The internal combustion engine assembly according to claim 1, wherein, upon detection of the contamination condition, the electronic controller is configured to signal a user of the contamination condition and request the command from the user. 9. The internal combustion engine assembly according to claim 1, wherein the controller is configured to provide an output signal indicative that the command for activating the de-contamination function should be given. 10. The internal combustion engine according to claim 9, wherein: the expected regeneration value is determined by a soot loading expectation assembly configured to provide a signal that includes information related to an expected soot loading level related parameter;the actual soot loading level related parameter is determined by an actual soot loading level sensor assembly of the exhaust system;the electronic controller is configured to: determine on the basis of a soot loading expectation assembly signal a history value or signal indicative of an expected soot loading level related parameter in the particulate filter,determine on the basis of the actual soot loading level sensor assembly signal a value or signal indicative of an actual soot loading level related parameter in the particulate filter, andcompare the expected soot loading level related parameter history value or signal with the actual soot loading level related parameter value or signal and responsive to the comparing provide at least the output signal. 11. The internal combustion engine assembly of claim 10, wherein the soot loading expectation assembly includes an exhaust gas temperature sensor, wherein the soot loading expectation assembly signal history value or signal is an exhaust gas temperature history. 12. The internal combustion engine assembly according to claim 10, wherein the soot loading expectation assembly includes at least one sensor chosen from the group including: a torque sensor;an engine speed sensor;an intake throttle valve position sensor;an EGR-valve position sensor;a backpressure valve position sensor; anda chemical composition sensor in the exhaust system that is configured for measuring at least one of the presence and the concentration of at least one chemical component in the exhaust gas. 13. The internal combustion engine assembly of claim 10, wherein the actual soot loading level sensor assembly includes a soot loading sensor that is connected to the electronic controller and that is arranged for directly determining the actual soot loading level related parameter. 14. The internal combustion engine assembly of claim 13, wherein the soot loading sensor is a RF-sensor in the after-treatment system. 15. The internal combustion engine assembly of claim 10, wherein the electronic controller includes a soot loading expectation assembly signal history function configured to store in the memory combinations of sample time moments and associated soot loading expectation assembly signals to determine the soot loading expectation assembly signal history value, the soot loading expectation assembly signal history function having input parameters including at least a soot loading expectation assembly signal provided by the soot loading expectation assembly, and a sample time signal. 16. The internal combustion engine assembly according to claim 15, wherein the electronic controller includes a regeneration determination function having as input parameters the combinations of sample time moments and associated soot loading expectation assembly signals over a certain time period and including an algorithm configured to determine whether regeneration has been promoted and to output a regeneration expectation value. 17. The internal combustion engine assembly according to claim 16, wherein the electronic controller includes a decision function including a decision rule and having as input signals the regeneration expectation value and an actual soot loading trend parameter derived from the actual soot loading level sensor assembly signal and providing one of the at least one output signals, the one of the at least one output signals being true or false and the decision rule being: whether the regeneration expectation value indicates that regeneration has been promoted and the soot loading trend parameter is positive. 18. The internal combustion engine assembly according to claim 10, wherein the electronic controller is configured to derive an actual soot loading trend parameter from the signal of the actual soot loading level sensor assembly by differentiating the actual soot loading level sensor assembly signal with respect to time and by passing the result through a low pass filter. 19. An internal combustion engine assembly comprising: at least one combustion chamber;an exhaust system with an after-treatment system having an oxidation catalyst and a particulate filter;an electronic controller having a de-contamination function that is, responsive to a command, configured to de-contaminate the particulate filter and the oxidation catalyst by increasing the exhaust gas temperature at an inlet of the after-treatment system to above a de-contamination temperature during a certain time period;a soot loading expectation assembly configured to provide a signal that includes information related to an expected soot loading level related parameter;the exhaust system including an actual soot loading level sensor assembly configured to provide a signal that includes information related to an actual soot loading level related parameter;wherein the electronic controller is configured to: determine on the basis of a soot loading expectation assembly signal history value or signal indicative of an expected soot loading level related parameter in the particulate filter,determine on the basis of the actual soot loading level sensor assembly signal a value or signal indicative of an actual soot loading level related parameter in the particulate filter, andcompare the expected soot loading level related parameter value or signal with the actual soot loading level related parameter value or signal and responsive to the comparing provide at least the output signal,wherein the controller is configured to provide an output signal indicative that the command for activating the de-contamination function should be given,wherein the electronic controller includes a soot loading expectation assembly signal history function configured to store in the memory combinations of sample time moments and associated soot loading expectation assembly signals to determine the soot loading expectation assembly signal history, the soot loading expectation assembly signal history function having input parameters including at least a soot loading expectation assembly signal provided by the soot loading expectation assembly, and a sample time signal,wherein the electronic controller includes a regeneration determination function having as input parameters the combinations of sample time moments and associated soot loading expectation assembly signals over a certain time period and including an algorithm configured to determine whether regeneration has been promoted and to output a regeneration expectation value, andwherein the algorithm of the regeneration determination function is configured to compare the sampled soot loading expectation assembly signals with at least one reference value and to determine the number of soot loading expectation assembly signal samples above the at least one reference value and the number of soot loading expectation assembly signal samples below the reference value and to output the difference between those numbers as the regeneration expectation value. 20. A method for de-contaminating an after-treatment assembly of an exhaust system of an internal combustion engine assembly having at least one combustion chamber, the after-treatment assembly having a particulate filter and an oxidation catalyst, the method including: detecting a contamination condition of the particulate filter and the oxidation catalyst, the contamination condition being different from a high soot loading in the particulate filter; andupon detection of the contamination condition, increasing the exhaust gas temperature at an inlet of the after-treatment system to above a de-contamination temperature during a certain time period,wherein detecting the contamination condition includes detecting the contamination condition based on a detected discrepancy between an expected regeneration value and an actual soot loading level related parameter in the oxidation catalyst and the particulate filter. 21. The method according to claim 20, wherein, for an internal combustion engine assembly having an air intake system, a fuel supply system for introducing fuel into the at least one combustion chamber, a back pressure valve in the exhaust system, the method including: controlling a position of the back pressure valve for increasing the exhaust gas temperature at the inlet of the after-treatment system to above the de-contamination temperature. 22. The method according to claim 20, including: controlling at least one of the following parameters for increasing the exhaust gas temperature at the inlet of the after-treatment system to above the decontamination temperature: a load of the engine;a speed of the engine;a position of an intake throttle valve;an intake pressure;a fuel supply to the combustion chamber including at least one of a fuel amount and a fuel injection timing;a waste gate valve position; andan EGR-valve position. 23. The method according to claim 20, wherein the exhaust gas temperature is increased to above 400° C. 24. The method according to claim 20, wherein the certain time is longer than about 6 minutes. 25. The method according to claim 20, wherein the certain time is shorter than about 20 minutes. 26. The method according to claim 20, including: determining that de-contamination should be effected; andoutputting a signal to a user indicative that the exhaust gas temperature at an inlet of the after-treatment system should be increased to above a de-contamination temperature during a certain time period. 27. The method according to claim 20, wherein the internal combustion engine assembly has an actual soot loading level sensor assembly, and the method includes: determining on the basis of a signal of the actual soot loading level sensor assembly signal whether the actual soot loading level in the particulate filter decreases. 28. The method according to claim 20, wherein detecting the contamination condition includes detecting the contamination condition caused by wrong fuel used in the combustion engine. 29. The method according to claim 20, further including, upon detection of the contamination condition, signaling a user of the contamination condition and requesting a command from the user for activating the step of increasing the exhaust gas temperature.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (7)
Viola, Michael B., Apparatus and method to inject a reductant into an exhaust gas feedstream.
Wang, Yue Yun; Popuri, Sriram Satya Srinivas; Ruth, Michael J.; Cunningham, Michael J.; Wills, Joan M.; Chen, Jer-Sheng J.; Geckler, Samuel C., System for controlling triggering of adsorber regeneration.
Zhang, Xiaogang; Yi, Jianwen James; Dai, Wen; Laing, Paul M.; Hedges, John; Buckland, Julia Helen; Sun, Harold Huimin, Secondary air introduction system and method for system operation.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.