A comparison between cylinder charge composition of common rail diesel engine

Eastwood, P G; Tufail, Khizer; Winstanley, T; Darlington, Alex; Karagiorgis, Stelios; Hardalupas, Y.; Taylor, A. M. K. P.

doi:10.1504/ijvd.2009.024245

Cited by 2 publications

(1 citation statement)

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“…The dynamics of EGR delivery during engine transients have been studied previously using similar instrumentation [17] in an attempt to assess the viability of enhanced engine control and its benefits regarding NO x emissions. These recent publications indicate that simply calibrating an engine based on a series of steady state engine mapping points would be inadequate in predicting and controlling its transient emissions behaviour.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the effects of the exhaust gas recirculation delay on the nitrogen oxide emissions within a turbocharged passenger car diesel engine

Peckham

Campbell

Finch

2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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Fast-response nitrogen oxide (NO x ) and carbon dioxide (CO 2 ) analysers have been used to study the effects of exhaust gas recirculation (EGR) delay within a modern diesel passenger car. These analysers have response times of the order of a few milliseconds, allowing the CO 2 analyser to be used to study the effects of the EGR transit delay during engine transients and the effect of sudden EGR valve actuation during a drive cycle. The effect of the EGR system delays on the NO x emissions was measured with the fast-response NO x analyser. The results indicate that the EGR delay contributes to the sharp short-duration spikes of NO x .Tests have also been carried out to identify the transient cylinder-to-cylinder EGR distribution by comparing the CO 2 concentrations in the inlet ports, again using the fast-response CO 2 analyser. The results of these tests show a variation between the CO 2 concentrations in the intake ports, suggesting a poor EGR distribution under certain conditions.Measurements have been recorded of the EGR in the intake port runner of just one of the engine's cylinders and have been compared with the exhaust port NO x emissions. This provided some data on a cycle-by-cycle basis including the number of engine cycles required for the burned gas to complete the EGR circuit.

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Section: Introductionmentioning

confidence: 99%