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

A sensor and fault 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 the deterioration of the sensor's operating efficiency, performance decline, and faults

Active Publication Date: 2013-10-30
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 even failure such that they cannot be used for their intended purpose
A sensor failure may occur when an operator operates a motor vehicle provided with such an engine that is used as the prime mover

Method used

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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 provided for purposes of illustration of exemplary embodiments only and are not intended to limit these embodiments. figure 1 A schematic diagram of a combustion engine 70 including pistons, cylinders and accessories associated with its operation is shown, according to one embodiment of the present invention. The combustion engine may be a spark ignition engine or a compression ignition engine, and in a preferred embodiment is piston driven. The intake duct 3 delivers ambient air en route to one or more engine cylinders. The exhaust pipe 5 conveys the exhaust gas emitted by the combustion engine 70 during 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 arranged in the exhaust duct, as is known...

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Abstract

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 statements in this section merely provide background information related to the present disclosure 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 their performance characteristics and the treatment of the exhaust stream of exhaust gases released by such engines. This control over engine operation and exhaust flow is made possible largely by placing various types of sensors around the engine whose output is directed as input to the microprocessor, which in turn Operational control is performed by engine controls, including, inter alia: the fuel delivery system, the exhaust gas recirculation system, and the air injector and reactor systems. [0004] Due to the nature of sensors in general, it ...

Claims

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Application Information

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