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Dive into the research topics where Erich Schiefer is active.

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Featured researches published by Erich Schiefer.


MTZ worldwide | 2004

A new system for measuring the nitrogen components N2O, NH3, NO and NO2 downstream of DeNOX catalytic converters

Guido Leippe; Bernd Lenzen; Paul Spurk; Walter Fabinski; Michael Moede; Helmut Pongratz; Wolfgang Schindler; Erich Schiefer

This article by the Technical University of Darmstadt and by Umicore, ABB APR and AVL List describes a new measuring system for optimising the performance of SCR systems by analysing the exhaust gas components NH3, NO, NO2 and N2O. A newly developed UV photometer that is able to simultaneously measure NH3, NO and NO2 was used. In addition, N2O was measured by an improved NDIR. Both analysers used a specially configured sampling method. The performance of this measuring system was evaluated on a heavy-duty diesel engine test bench equipped with a state-of-the-art SCR catalyst system.


MTZ - Motortechnische Zeitschrift | 2004

Neues System zur Messung von Stickstoffkomponenten im Einsatz an SCR-Katalysatoren

Wolfgang Schindler; Erich Schiefer; G Keippe; B Lenzen; P Spurk; W Fabinski; M Moede; Helmut Pongratz

Dieser Artikel der TU Darmstadt sowie der Firmen Umicore, ABB APR und AVL List beschreibt ein neues Messsystem zur Optimierung von beispielsweise SCR-Katalysatorsystemen durch gleichzeitige Messung der Abgaskomponenten NH3, NO, NO2 und N2O. Hierfur werden Analysatoren auf Basis von neu entwickelten beziehungsweise optimierten Fotometertechniken genutzt. Untersucht wurde das Messsystem an einem Nutzfahrzeug-Motorenprufstand, ausgestattet mit einem State-of-the-Art-SCR-Katalysatorsystem.


Archive | 1989

Method and a device for measuring the air/fuel ratio of an internal combustion engine

Peter W. Krempl; Wolfgang Schindler; Erich Schiefer


Archive | 1986

Method for quantitative analysis of hydrocarbon

Erich Schiefer; Wolfgang Schindler; Peter W. Krempl


SAE transactions | 1985

Dynamic Measurements of Particulate Mass Emission on Light-Duty Diesel Engines under Steady State and Transient Conditions

Peter W. Krempl; Wolfgang Schindler; Erich Schiefer


Archive | 1985

Method and device for quantitatively determining gaseous combustion components

Peter W. Krempl; Erich Schiefer


SAE International journal of engines | 2013

Overview of Soot Emission Measurements Instrumentation: From Smoke and Filter Mass to Particle Number

Barouch Giechaskiel; Erich Schiefer; Wolfgang Schindler; Harald Axmann; Christos Dardiotis


Archive | 2000

Opacity measuring method for exhaust gas, involves using pair of filters with different pass band wavelength range for measurement of opaqueness of gas, whose signal values are compared automatically

Erich Schiefer; Wolfgang Schindler


Archive | 2011

METHOD FOR AUTOMATICALLY OPERATING A MEASURING DEVICE FOR MEASURING PARTICLES IN GASES

Erich Unger; Erich Schiefer; Oliver Fritz


SAE transactions | 2000

Study of Interferences for ULEV-CVS Measurement, Related to the Complete Measuring System, Discussion of Error Sources, Cross-Sensitivity and Adsorption

Erich Schiefer; Wolfgang Schindler; Heinz Schimpl

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