An Investigation of Cylinder Pressure as Feedback for Control of Internal Combustion Engines

1989 ◽  
Author(s):  
Peter Wibberley ◽  
Christopher A. Clark
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Cylinder Pressure

scholarly journals The analysis of an unrepeatability of cylinder pressure signal in internal combustion engines

2005 ◽  
Vol 120 (1) ◽  
pp. 31-39
Author(s):  
Zdzisław CHŁOPEK ◽  
Piotr STASIAK
Keyword(s):  
Normal Distribution ◽  
Internal Combustion Engines ◽  
Engine Speed ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Cylinder Pressure ◽  
Static Properties ◽  
Pressure Signal ◽  
Wide Range ◽  
Static Conditions

In this paper an analysis of irrepeatability of cylinder pressure signal in static conditions of engine work was performed. Large irregularity of analysed signal was stated that follows the irregularity of engine speed and pressure value distortions in each quasi–period. A stationarity of cylinder pressure was studied. Resampling data method in the revolution angle domain was suggested. Due to this synchronised averaging, transformed signal was an effective method of eliminating distortions in the basic periodical signal. Static properties of signal deviations (deviations of cylinder pressure from pressure averaged in quasi–periods) were studied. It was stated that the analysed distortions are a wide–range noise and there is no reason to formulate a hypothesis regarding the analysed signal conformity with a normal distribution.

Determination of cycle number for real in-cylinder pressure cycle analysis in internal combustion engines

Energy ◽  
2011 ◽  
Vol 36 (5) ◽  
pp. 2465-2472 ◽  
Author(s):  
M. Akif Ceviz ◽  
Bülent Çavuşoğlu ◽  
Ferhat Kaya ◽  
İ. Volkan Öner
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Cylinder Pressure ◽  
Cycle Number ◽  
Pressure Cycle

scholarly journals Method for Determining Volumetric Efficiency and Its Experimental Validation

2017 ◽  
Vol 5 (1) ◽  
pp. 5-17
Author(s):  
Andrzej Ambrozik ◽  
Dariusz Kurczyński ◽  
Piotr Łagowski
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Thermodynamic System ◽  
Volumetric Efficiency ◽  
Experimental Investigations ◽  
Combustion Engines ◽  
Cylinder Pressure ◽  
Operating Cycle ◽  
Ic Engine ◽  
Amount Of Substance

Abstract Modern means of transport are basically powered by piston internal combustion engines. Increasingly rigorous demands are placed on IC engines in order to minimise the detrimental impact they have on the natural environment. That stimulates the development of research on piston internal combustion engines. The research involves experimental and theoretical investigations carried out using computer technologies. While being filled, the cylinder is considered to be an open thermodynamic system, in which non-stationary processes occur. To make calculations of thermodynamic parameters of the engine operating cycle, based on the comparison of cycles, it is necessary to know the mean constant value of cylinder pressure throughout this process. Because of the character of in-cylinder pressure pattern and difficulties in pressure experimental determination, in the present paper, a novel method for the determination of this quantity was presented. In the new approach, the iteration method was used. In the method developed for determining the volumetric efficiency, the following equations were employed: the law of conservation of the amount of substance, the first law of thermodynamics for open system, dependences for changes in the cylinder volume vs. the crankshaft rotation angle, and the state equation. The results of calculations performed with this method were validated by means of experimental investigations carried out for a selected engine at the engine test bench. A satisfactory congruence of computational and experimental results as regards determining the volumetric efficiency was obtained. The method for determining the volumetric efficiency presented in the paper can be used to investigate the processes taking place in the cylinder of an IC engine.

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