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Three-way catalytic converter (TWC) efficiency monitoring methods

Author: NieCunQing
Tutor: WangShengChang
School: Chang'an University
Course: Vehicle Operation Engineering
Keywords: Emissions from vehicles Three - way catalytic converter Conversion efficiency Entrance temperature difference Monitoring model
CLC: U464
Type: Master's thesis
Year: 2005
Downloads: 206
Quote: 4
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Abstract


With increasingly stringent vehicle emission regulations , the development and application of three-way catalytic converter has become a fundamental way to control vehicle emissions of pollutants . Currently, electronic fuel injection and three-way catalytic converter closed loop control technology has become one of the main measures to control vehicle emissions , but with the continuous extension of time for the use of three - way catalytic converter , the purification efficiency continued to decline , and thus , the three real-time monitoring of the yuan catalytic converter conversion efficiency of attention and research issues . In the the vehicle simulated road test on the basis of the study, monitored by the the entrance temperature difference of the catalytic converter three-way catalytic converter, the conversion efficiency of the method . In this paper, on the basis of analysis of electronically controlled injection automotive emission control technology and three-way catalytic converter failure mechanisms , efficiency monitoring technology selected models - flyer three-way catalytic converter inlet and outlet temperature at constant load analysis of the speed test under the conditions of the test data to obtain the necessary information to reflect the three-way catalytic converter efficiency on mathematical statistics the corresponding function relationships of the import and export of the temperature difference between the value and the conversion efficiency of the catalytic converter , and can establish a the evaluation model for monitoring efficiency of catalytic converters in cars . The results of this study have some practical value and significance of real-time monitoring of vehicle emissions .

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive engine
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