Verbrennungsmotoren

Abstract

Dieses Werk ist urheberrechtlich geschützt. Die dadurch begründeten Rechte, insbesondere die der Übersetzung, des Nachdrucks, des Vortrags, der Entnahme von Abbildungen und Tabellen, der Funksendung, der Mikroverfilmung oder der Vervielfältigung auf anderen Wegen und der Speicherung in Datenverarbeitungsanlagen, bleiben, auch bei nur auszugsweiser Verwertung, vorbehalten. Eine Vervielfältigung dieses Werkes oder von Teilen dieses Werkes ist auch im Einzelfall nur in den Grenzen der gesetzlichen Bestimmungen des Urheberrechtsgesetzes der Bundesrepublik Deutschland vom 9. September 1965 in der jeweils geltenden Fa~sung zulässig. Sie ist grundsätzlich vergütungspflichtig.Zuwiderhandlungen unterliegen den Strafbestimmungen des Urheberrechtsgesetzes.

Can a quantitative simulation of an Otto engine be accurately rendered by a simple Novikov model with heat leak?

“…Describing the gas exchange we address the following features [20][21][22]: Technically this is achieved by suitable valves.…”

“…Based on the adiabaticity of the gas flow [21], the flow velocity is determined from energy considerations. Gas flow The amount of gas entering and leaving the cylinder depends on the pressures, the valve geometry and timing and the thermodynamic properties of the gas.…”

“…It is based on standard features used in modelling Otto engines [19][20][21][22]. For a thorough analysis one needs not only properties like speed and power output but also 'inner' properties, especially entropy fluxes, which are not or not easily measurable.…”

Group-III-Nitride Based Gas Sensing Devices

“…In a second step the gas sensitivity of Pt-GaN Schottky diodes was tested. To this end a number of reducing gases was diluted in a background of synthetic air (4% O 2 in N 2 ) and the gas response was measured with the device operation temperature varying in the range from 200 to 600 C. The concentrations of the individual test gases as well as the oxygen concentration in the background air were chosen according to the concentration ranges expected for exhaust gas emissions from lean-burn engines [6]. The results summarized in Fig.…”

Group-III-Nitride Based Gas Sensing Devices

“…To this end a number of reducing gases was diluted in a background of synthetic air (4% O 2 in N 2 ) and the gas response was measured with the device operation temperature varying in the range from 200 to 600 C. The concentrations of the individual test gases as well as the oxygen concentration in the background air were chosen according to the concentration ranges expected for exhaust gas emissions from lean-burn engines [6]. The results summarized in Fig.…”