Experimental Study of Combustion Fluctuation Reduction Using In-Cylinder Pressure Estimation in Gasoline Engine

A novel first principle based control oriented model of a gasoline engine is proposed which also carries diagnostic capabilities. Unlike existing control oriented models, the formulated model reflects dynamics of the faultless as well as faulty engine with high fidelity. In the proposed model, the torque production subsystem is obtained by integration of further two subsystems that is model of a single cylinder torque producing mechanism and an analytical gasoline engine cylinder pressure model. Model of a single cylinder torque producing mechanism is derived using constrained equation of motion (EOM) in Lagrangian mechanics. While cylinder pressure is evaluated using a closed form parametric analytical gasoline engine cylinder pressure model. Novel attributes of the proposed model include minimal usage of empirical relations and relatively wider region of model validity. Additionally, the model provides model based description of crankshaft angular speed fluctuations and tension in the rigid bodies. Capacity of the model to describe the system dynamics under fault conditions is elaborated with case study of an intermittent misfire condition. Model attains new capabilities based on the said novel attributes. The model is successfully validated against experimental data.

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Experimental Study on the Valve Gap in the Gasoline Engine

MATEC Web of Conferences ◽

10.1051/matecconf/201925602011 ◽

2019 ◽

Vol 256 ◽

pp. 02011

Author(s):

Fan Dong ◽

Chong Lei ◽

Xiao Yu Yang ◽

Shao Feng Wang ◽

Cong Ruan

Keyword(s):

Experimental Study ◽

Heat Release ◽

Significant Influence ◽

Normal State ◽

Cylinder Head ◽

Gasoline Engine ◽

The Other ◽

Gasoline Engines ◽

Timing System

The influences of the installations of the camshaft support, and timing system and the heat release on the valve gap of the gasoline engine were analyzed in the present. The experiments were carried out on 50 4-cylinder 4-stroke gasoline engines, and the results indicate that to tighten the camshaft support has a great impact on valve gap, the indicated mean there was an obvious deformation in cylinder head after the camshaft support was tightened. The timing system also has a significant influence on the valve gap because it produces a downward force to the camshaft, leading to a smaller valve gap near the timing system and a bigger valve gap on the other side. It was also found that with the increase of temperature the valve gap was 0.1 mm larger than that in the normal state.

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An Experimental Study on Combustion and Emission Analysis of Four Cylinder 4-Stroke Gasoline Engine Using Pure Hydrogen and LPG at Idle Condition

Energy Procedia ◽

10.1016/j.egypro.2016.11.220 ◽

2016 ◽

Vol 90 ◽

pp. 525-534 ◽

Cited By ~ 16

Author(s):

P.R. Chitragar ◽

K.V. Shivaprasad ◽

Vighnesh Nayak ◽

P. Bedar ◽

G.N. Kumar

Keyword(s):

Experimental Study ◽

Gasoline Engine ◽

Pure Hydrogen ◽

Emission Analysis

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Remote Combustion Sensing Methodology for Non-Intrusive Cylinder Pressure Estimation in Diesel Engines

IFAC Proceedings Volumes ◽

10.3182/20130904-4-jp-2042.00039 ◽

2013 ◽

Vol 46 (21) ◽

pp. 353-359 ◽

Cited By ~ 1

Author(s):

Fabrizio Ponti ◽

Vittorio Ravaglioli ◽

Enrico Corti ◽

Davide Moro ◽

Matteo De Cesare

Keyword(s):

Diesel Engines ◽

Cylinder Pressure ◽

Pressure Estimation

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Experimental study on the energy consumption of gasoline engine lubricating pumps in standardized driving cycles

Mechanics Based Design of Structures and Machines ◽

10.1080/15397734.2020.1846558 ◽

2020 ◽

pp. 1-14

Author(s):

Zhongmin Liu ◽

Xin Zhai

Keyword(s):

Experimental Study ◽

Energy Consumption ◽

Gasoline Engine ◽

Driving Cycles

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Research of NOx Emissions Characteristic of Engine Fuelled with M40

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.382.22 ◽

2011 ◽

Vol 382 ◽

pp. 22-25

Author(s):

Xin Guang Li ◽

Bing Yuan Han ◽

Rong Hai Yang

Keyword(s):

Experimental Data ◽

Numerical Simulation ◽

Simulation Model ◽

Compression Ratio ◽

Gasoline Engine ◽

Volume Ratio ◽

Nox Emissions ◽

Cylinder Pressure ◽

Variable Parameters ◽

Vehicle Engine

A numerical simulation model for gasoline engine was established by GT-POWER in order to study the NOx emissions characteristic of vehicle engine fuelled with M40 (the methanol and the gasoline in volume ratio 40∶60) and was validated by Experimental data. Based on the model, the variable parameters study including air-fuel radio, compression radio and ignition advance angle were carried out. The model results showed that the compression radio and the air-fuel radio played an important role during the NOx emissions characteristic. There is a significant improvement of the NOx emissions with the compression ratio increases. The cylinder pressure increased with the improvement of the compression ratio brought out the NOx emissions rise. With the improvement of the air-fuel ratio, NOx emissions increased first and then decreased. A larger ignition advance angle can increase the pressure and the temperature of the cylinder.

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