Model-based diagnostics of NOX sensor malfunction for selective catalyst reduction system

A sensor and detection sensor technology, which is applied to the diagnostic device of the exhaust gas treatment device, the charging system, the machine/engine, etc., and can solve the problems of sensor operation efficiency degradation, failure, and performance degradation, etc.

Active Publication Date: 2010-09-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the nature of sensors in general, it sometimes happens that one or more of the sensors located around the engine may experience operational degradation, performance degradation or...

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  • Model-based diagnostics of NOX sensor malfunction for selective catalyst reduction system
  • Model-based diagnostics of NOX sensor malfunction for selective catalyst reduction system
  • Model-based diagnostics of NOX sensor malfunction for selective catalyst reduction system

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Embodiment Construction

[0062] Referring now to the drawings, the drawings are only provided for illustrating exemplary embodiments and are not used to limit these embodiments. figure 1 A schematic diagram of a combustion engine 70 according to an embodiment of the present invention is shown. The combustion engine includes a piston, a cylinder, and accessories related to its operation. The combustion engine may be a spark-ignition engine or a compression-ignition engine, and in a preferred embodiment is piston-driven. The intake pipe 3 delivers ambient air on the way to one or more engine cylinders. The exhaust pipe 5 conveys exhaust gas discharged by the combustion engine 70 in its normal operation. In some embodiments, a compressor 7 is also provided to compress the intake air, thereby increasing the density of the intake air to provide a higher oxygen concentration in the air supplied to the engine. The compressor 7 may be shaft driven by a turbine 9 provided in the exhaust pipe, as is known in th...

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Abstract

The invention relates to a model-based diagnostics of NOX sensor malfunction for selective catalyst reduction system. Methods and systems for detecting faults with nitrogen oxides sensors used to detect the presence of nitrogen oxides in an exhaust effluent gas stream emitted from a combustion engine during its operation include providing a virtual nitrogen oxides sensor measurement compared with actual nitrogen oxides content measured by nitrogen oxides sensors.

Description

Technical field [0001] The present invention generally relates to the treatment of exhaust gas streams produced by combustion processes. Background technique [0002] The description in this section only provides background information related to the present invention and may not constitute prior art. [0003] It is well known that modern combustion engines are equipped with control systems to control their operation, including controlling their performance characteristics and the treatment of exhaust gas streams released by such engines. This control of engine operation and exhaust flow is largely made possible by placing various types of sensors around the engine. The output of these sensors is guided as the input of the microprocessor, and the microprocessor controls various The engine control device performs operation control, and the engine control device particularly includes a fuel delivery system, an exhaust gas recirculation system, and an air injector and reactor system....

Claims

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Application Information

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IPC IPC(8): F01N11/00
CPCF02D2041/1433F02D41/222F02D41/146Y02T10/47F02M25/0727F02D41/1463F02M25/0718F01N2550/02F01N11/007F02B37/24F02M25/0703F02D41/1465Y02T10/40F02M25/0713F01N2560/026F01N11/005F02B29/0406F02M26/10F02M26/12F02M26/15F02M26/23
Inventor Y·-Y·王O·N·亚纳基夫I·哈斯卡拉
Owner GM GLOBAL TECH OPERATIONS LLC
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