Cooled EGR Rate Measurement with a Thermal Anemometer for EPA02 Heavy Duty Diesel Engine Emission Control

Griffin, Joseph R.; Ganseman, Chris; Baerts, Chris; Burkholder, Nelson; Geyer, Stephen; Smith, Doug

doi:10.4271/2003-01-0263

Cited by 5 publications

(1 citation statement)

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“…The EGR flow rate can be estimated from CO2 concentration in the intake manifold by measuring the infrared radiation absorption amount of the CO2 [13,14]. A thermal anemometer which uses a ceramic element can be made into an EGR flow rate sensor [15]. It is also reported that the hot EGR mass fraction can be estimated by the temperature of hot EGR gas and fresh charging air using the thermal balance method [16,17].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Exhaust Gas Recirculation Mass Flow Rate in Modern Diesel Engines

Yang

Winward

O'Brien

et al. 2016

SAE Technical Paper Series

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Section: Introductionmentioning

confidence: 99%

Modelling the Exhaust Gas Recirculation Mass Flow Rate in Modern Diesel Engines

Yang

Winward

O'Brien

et al. 2016

SAE Technical Paper Series

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Thermodynamic simulation of exhaust gas recirculation coolers used on diesels based on finite element method

Wang

Tang

2008

2008 Asia Simulation Conference - 7th International Conference on System Simulation and Scientific Computing

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The thermodynamics of exhaust gas recirculation (EGR) coolers plays a very important role for reducing oxides of nitrogen (NO X ) emissions of diesel engines. Using the ANSYS software, some fluid thermodynamic models of EGR coolers were established by using the finite element method (FEM); and the temperature fields of gas fluids in the EGR coolers were simulated and verified by comparing the experimental results from some literatures. Based on the FEM models, furthermore, cooling efficiencies of the EGR coolers with different diffuser structures and different numbers of cooling tubes were analyzed and discussed. The comparison results show that, for the same dimension of EGR coolers, their cooling efficiencies can be increased up to five or thirteen percents by replacing their column diffusers with cone diffusers or by properly selecting the tube numbers of the EGR coolers.

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An ultrasonic sound speed sensor for measuring exhaust gas recirculation levels

Olfert

Checkel

2007

Proceedings of the Institution of Mechanical Engineers, Part D:

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Exhaust gas recirculation (EGR) has been used for years to improve the performance of internal combustion engines. This paper shows that acoustic methods can be used to measure EGR. Theory is presented which shows that measurements of the speed of sound can be used to measure the amount of EGR in the intake manifold. In particular, a new method called the discrete acoustic wave and phase detection (DAWPD) method can be used to measure EGR levels with a fast-response time. Experimental results show that a DAWPD sensor can be used to measure EGR levels with adequate accuracy (±1.3 per cent EGR) at steady state. Transient measurements were not possible owing to engine limitations. The sensor's performance was limited by the ultrasonic transducers used. It is postulated that sensor performance could be improved with smaller and temperature-independent non-resonant transducers.

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Cooled EGR Rate Measurement with a Thermal Anemometer for EPA02 Heavy Duty Diesel Engine Emission Control

Cited by 5 publications

References 0 publications

Modelling the Exhaust Gas Recirculation Mass Flow Rate in Modern Diesel Engines

Modelling the Exhaust Gas Recirculation Mass Flow Rate in Modern Diesel Engines

Thermodynamic simulation of exhaust gas recirculation coolers used on diesels based on finite element method

An ultrasonic sound speed sensor for measuring exhaust gas recirculation levels

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