Mean Value Engine Modeling and Validation for a 4-stroke, Single Cylinder Gasoline Engine

2007 ◽  
Vol 2 (2) ◽  
pp. 124-131 ◽  
Author(s):  
Wen-Po Chaing . ◽  
Liangtao Zhu . ◽  
Ravindra Patankar .
Keyword(s):  
Gasoline Engine ◽  
Mean Value ◽  
Single Cylinder ◽  
Engine Modeling

Modeling and Estimation of Unmeasured Variables in a Wastegate Operated Turbocharger

2014 ◽  
Vol 136 (5) ◽  
Author(s):  
Rasoul Salehi ◽  
Gholamreza Vossoughi ◽  
Aria Alasty
Keyword(s):  
Gas Flow ◽  
Gasoline Engine ◽  
Combustion Engine ◽  
Pressure Ratio ◽  
Mean Value ◽  
Compressible Fluids ◽  
Effective Pressure ◽  
Engine Modeling ◽  
Constant Area ◽  
Proper Operation

Estimation of relevant turbocharger variables is crucial for proper operation and monitoring of turbocharged (TC) engines, which are important in improving fuel economy of vehicles. This paper presents mean-value models developed for estimating gas flow over the turbine and the wastegate (WG), the wastegate position, and the compressor speed in a TC gasoline engine. The turbine is modeled by an isentropic nozzle with a constant area and an effective pressure ratio calculated from the turbine upstream and downstream pressures. Another physically sensible model is developed for estimating either the WG flow or position. Provided the WG position is available, the WG flow is estimated using the orifice model for compressible fluids. The WG position is predicted considering forces from the WG passing flow and actuator. Moreover, a model for estimating the compressor speed in low and medium compressor pressure ratios is proposed, using the compressor head and efficiency modified by the turbine effective pressure ratio. The estimates of the turbocharger variables match well with the experimentally measured data. The three proposed models are simple in structure, accurate enough to be utilized for engine modeling, and suitable to be validated and calibrated on an internal combustion engine in a test cell.

PID-LIKE FLC FOR FOUR CYLINDERS MEAN VALUE GASOLINE ENGINE MODEL IN IDLE MODE

2018 ◽  
Vol 09 (02) ◽  
pp. 114-130
Author(s):  
Mohammed Hassan ◽  
◽  
Muslim Abdali ◽  
Keyword(s):  
Gasoline Engine ◽  
Mean Value ◽  
Idle Mode ◽  
Engine Model ◽  
Four Cylinders

First Principle Based Control Oriented Gasoline Engine Model Including Lumped Cylinder Dynamics

2018 ◽  
Vol 140 (8) ◽  
Author(s):  
Ahmed Yar ◽  
A. I. Bhatti ◽  
Qadeer Ahmed
Keyword(s):  
Gasoline Engine ◽  
Angular Speed ◽  
Rigid Bodies ◽  
First Principle ◽  
Cylinder Pressure ◽  
Single Cylinder ◽  
Engine Model ◽  
Proposed Model ◽  
Engine Cylinder ◽  
Diagnostic Capabilities

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.

Comparison of Promising Sustainable C1-Fuels Methanol, Dimethyl Carbonate, and Methyl Formate in a DISI Single-Cylinder Light Vehicle Gasoline Engine

2021 ◽  
Author(s):  
Sebastian Blochum ◽  
Felix Fellner ◽  
Markus Mühlthaler ◽  
Martin Härtl ◽  
Georg Wachtmeister ◽  
...  
Keyword(s):  
Dimethyl Carbonate ◽  
Methyl Formate ◽  
Gasoline Engine ◽  
Single Cylinder ◽  
Light Vehicle

First Principle-Based Control Oriented Model of a Gasoline Engine

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Ahmed Yar ◽  
A. I. Bhatti ◽  
Qadeer Ahmed
Keyword(s):  
Mathematical Model ◽  
Gasoline Engine ◽  
Mean Value ◽  
First Principle ◽  
Unified Framework ◽  
Engine Model ◽  
Proposed Model ◽  
Suitable Form ◽  
Speed Fluctuations ◽  
The Mathematical Model

A first principle based-control oriented gasoline engine model is proposed that is based on the mathematical model of the actual piston and crankshaft mechanism. Unlike conventional mean value engine models (MVEMs), which involve approximating the torque production mechanism with a volumetric pump, the proposed model obviates this rather over-simplistic assumption. The alleviation of this assumption leads to the additional features in the model such as crankshaft speed fluctuations and tension in bodies forming the mechanism. The torque production dynamics are derived through Lagrangian mechanics. The derived equations are reduced to a suitable form that can be easily used in the control-oriented model. As a result, the abstraction level is greatly reduced between the engine system and the mathematical model. The proposed model is validated successfully against a commercially available 1.3 L gasoline engine. Being a transparent and more capable model, the proposed model can offer better insight into the engine dynamics, improved control design and diagnosis solutions, and that too, in a unified framework.

Sound & vibration control for a single-cylinder gasoline engine based on parameter optimization of timing-chain system

2017 ◽  
Vol 232 (13) ◽  
pp. 1815-1827
Author(s):  
Xianjun Hou ◽  
Songze Du ◽  
Chihua Lu ◽  
Zien Liu ◽  
Hao Zheng ◽  
...  
Keyword(s):  
Optimization Design ◽  
Gasoline Engine ◽  
Subjective Evaluation ◽  
Dynamic Performance ◽  
Transverse Displacement ◽  
Single Cylinder ◽  
Chain System ◽  
Design Scheme ◽  
Single Cylinder Engine ◽  
Timing System

In order to promote the idling noise quality of a single-cylinder gasoline engine, this paper addresses sound source identification and noise control research. The noise was identified by the application of subjective evaluation, acoustic spectrum and sound intensity analysis. It was found that the noise was caused by the anomalous dynamic performance of the timing system under idling conditions. Furthermore, sound and vibration characteristics of timing system were improved by design methodology research of key components. A multi-body dynamic model was established to characterize dynamic characteristics of the timing system under idling conditions. The key factor of producing noise was that the fluctuation of contact force between the chain and guide and transverse displacement of the chain were much higher than those of the allowable design limit. For the lowest design alternation and manufacturing costs, the work analyzed six timing system improvement schemes obtained by cross combination of tensioner blade line and guide strip radian parameters. After that, the optimal design scheme which could improve dynamic performance parameters of the timing system was derived. The design scheme was conducted with a acoustic test of engine to derive the following results. The noise level of a single-cylinder engine under idling conditions decreased by 3 dB(A). The abnormal noise of the original engine was eliminated under subjective evaluation. The sound quality under other working conditions had no apparent deterioration. Research shows that guide and tensioner blade line optimization design could improve dynamic performance of the timing chain system to eliminate abnormal noise, thereby significantly improving the acoustic characteristic of a single-cylinder engine.

Design and Modelling of Single Cylinder 4 Stroke Gasoline Engine Crankshaft

2019 ◽  
Author(s):  
Shourya Paul ◽  
Devanshu Jain ◽  
Rohan Brella ◽  
Naveen Kumar
Keyword(s):  
Gasoline Engine ◽  
Single Cylinder ◽  
Engine Crankshaft

scholarly journals Design of Biogas Converter for Single Cylinder Gasoline Engine

2014 ◽  
Vol 02 (1) ◽  
pp. 1-8
Author(s):  
Desrial Desrial ◽  
◽  
Dyah Wulandani ◽  
Keyword(s):  
Gasoline Engine ◽  
Single Cylinder

Study on Gasoline Engine Knock Indicators Based on Wavelet Transform and Rough Set

2013 ◽  
Vol 651 ◽  
pp. 625-630 ◽  
Author(s):  
Yan Yan Wang ◽  
Jian Guo Yang ◽  
Zhou Ying Ji
Keyword(s):  
Wavelet Transform ◽  
Set Theory ◽  
Rough Set ◽  
Gasoline Engine ◽  
Rough Set Theory ◽  
Mean Amplitude ◽  
Mean Value ◽  
Transform Method ◽  
Vibration Signals ◽  
Relationship Of

In order to improve the knock diagnosis accuracy, knock tests were carried out on a gasoline engine, and the slight knock characteristics from vibration signals of the gasoline engine were extracted by wavelet transform method. Making use of sub-band signals which were generated by wavelet transform of vibration signals as the style signals, 23 time-domain parameters were studied by using rough set theory, and the redundant relationship of the various parameters for describing the knock characteristic was revealed. Finally, the best parameters combination of peak-to-peak value, mean amplitude and mean value was put forward as the knock indicators. The result shows that the indicators obtained by rough set theory can diagnose slight knock combustion, and the diagnostic accuracy is better than single indicator determination knock method.

Sign in / Sign up

Export Citation Format

Share Document