SI-Engine Cylinder Pressure Estimation using Torque Sensors

2004 ◽  
Author(s):  
Stefan Larsson ◽  
Stefan Schagerberg
Keyword(s):  
Cylinder Pressure ◽  
Si Engine ◽  
Engine Cylinder ◽  
Pressure Estimation

A Model for Crank-Angle-Resolved Engine Cylinder Pressure Estimation

2018 ◽  
Author(s):  
Jing Wu ◽  
Andres Jacoby ◽  
Daniel Llamocca ◽  
Brian Sangeorzan
Keyword(s):  
Cylinder Pressure ◽  
Engine Cylinder ◽  
Crank Angle ◽  
Pressure Estimation

Cylinder Pressure Patterns in the SI Engine Fuelled by Methane and by Methane and Hydrogen Blends

2013 ◽  
Vol 210 ◽  
pp. 40-49 ◽  
Author(s):  
Andrzej Ambrozik ◽  
Tomasz Ambrozik ◽  
Dariusz Kurczyński ◽  
Piotr Łagowski ◽  
Edward Trzensik
Keyword(s):  
Alternative Fuels ◽  
Combustion Engine ◽  
Combustion Engines ◽  
Cylinder Pressure ◽  
Si Engine ◽  
Working Medium ◽  
Engine Cylinder ◽  
Long Time ◽  
The Subject ◽  
Object Of Control

nternal combustion engine has been in existence for a long time, but it is still in the scope of research interests and is contained in the subject matter of numerous development studies and analyses. The paper presents basic goals of research into combustion engines. A short characteristics of piston combustion engine as an object of control and adjustment was provided. It was indicated that measurements of the working medium cylinder pressure patterns could be applied to control the performance of the engine, especially the multi-fuel one. The paper presents the results of measurements of the working medium pressure patterns in the cylinder of 1.6 dm3X16SZR engine of Opel Astra car, which was fuelled by petrol, methane, and also by methane and hydrogen blends. Substantial differences in the cylinder pressure patterns were found for the engine running on alternative fuels and on conventional fuel. An increase in the hydrogen content in the blend resulted in an increase in the maximum pressures in the engine cylinder and improvements of indicated parameters when compared with the parameters determined for the engine fuelled by pure methane.

Thermodynamic Analysis of a Multi-Fueled Single Cylinder SI Engine

2011 ◽  
Author(s):  
M. Z. Haq ◽  
M. R. Mohiuddin
Keyword(s):  
Thermodynamic Analysis ◽  
Chemical Properties ◽  
Second Law Of Thermodynamics ◽  
Second Law ◽  
Si Engine ◽  
Gaseous Species ◽  
Single Cylinder ◽  
Engine Cylinder ◽  
Si Engines

The paper presents a thermodynamic analysis of a single cylinder four-stroke spark-ignition (SI) engine fuelled by four fuels namely iso-octane, methane, methanol and hydrogen. In SI engines, due to phenomena like ignition delay and finite flame speed manifested by the fuels, the heat addition process is not instantaneous, and hence ‘Weibe function’ is used to address the realistic heat release scenario of the engine. Empirical correlations are used to predict the heat loss from the engine cylinder. Physical states and chemical properties of gaseous species present inside the cylinder are determined using first and second law of thermodynamics, chemical kinetics, JANAF thermodynamic data-base and NASA polynomials. The model is implemented in FORTRAN 95 using standard numerical routines and some simulation results are validated against data available in literature. The second law of thermodynamics is applied to estimate the change of exergy i.e. the work potential or quality of the in-cylinder mixture undergoing various phases to complete the cycle. Results indicate that, around 4 to 24% of exergy initially possessed by the in-cylinder mixture is reduced during combustion and about 26 to 42% is left unused and exhausted to the atmosphere.

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