Modelling of an automotive natural gas engine for A/F control investigations

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  • English
typescript , [s.l.]
StatementAlister Julian Thomas.
ID Numbers
Open LibraryOL19086617M

In this thesis, the problem of A/F ratio control in a natural gas, internal combustion engine is addressed, with the global objective of reducing exhaust emission pollutants. A review of some mechanical approaches to exhaust pollutant reduction are assessed.

It is found that many techniques aid the reduction of exhaust pollutants, but the most effective is the 3-way catalytic : Alister Julian Thomas. "The topic of this book is modeling and control of internal combustion engines for automotive applications. In summary, this book is an essential text for anyone interested in engine control design.

It seems appropriate for a graduate-level course in particular, for students with some control Cited by: Abstract: Recent activity in nonthermodynamic modeling of automotive internal combustion engines with spark ignition, which are inherently nonlinear, is reviewed.

A fundamental nonlinear model of the engine is presented, and a linear control-oriented model is derived from the nonlinear process.

Techniques for experimental verification are examined, and a practical linear engine example. Modeling and Control of Engines and Drivelines is a comprehensive reference for graduate students and the authors’ close collaboration with the automotive industry ensures that the knowledge and skills that practicing engineers need when analysing and developing new powertrain systems are also covered.

- Control of diesel engines, combustion models, air flow and exhaust recirculation control, combustion-pressure-based control (HCCI), optimization of feedforward and feedback control, smoke limitation and emission control. This book is an introduction to electronic engine management with many practical examples, measurements and research.

High Pressure Diesel Engine Modeling Riccardo Baudille, Gino Bella, and Rossella Rotondi ICEF Ignition System Designed to Extend the Plug Life and the Lean Limit in a Natural Gas Engine A. Chan and S. Waters ICEF Preliminary Energy-Efficiency Analyses of an Active-Flow Aftertreatment System for Lean-Burn IC Engines.

At the present work, a simple experimentally based model for flame propagation period was developed for a natural gas engine. This model does not require any knowledge of the flame shape and propagation speed to calculate the burning rate.

The model was used along with the mass and energy conversation equations to calculate cylinder pressure. Air-ratio is an important engine parameter that relates closely to engine emissions, power, and brake-specific fuel consumption.

Model predictive controller (MPC) is a well-known technique for air. on the engine performance and emissions compared to the fuels gasoline and natural gas. The secondary objective was to employ a computer simulation of spark ignition engines to model the effects of the fuel composition on engine performance and emissions.

‗Powergas‘ gives a lower power output than gasoline and natural gas fuels. Spark ignition engine modeling • Semi-empiric approach: single-zone model Engine speed (rpm) Intake pressure (bar) 1. This book covers the various advanced reciprocating combustion engine technologies that utilize natural gas and alternative fuels for transportation and power generation applications.

It is divided in Emissions Control Technologies for Natural Gas Engines. Wahbi, A. Tsolakis, J. Herreros. The lower NOx emissions from natural gas combustion allowed the Australia engine to achieve a peak brake thermal efficiency in excess of 44%, enabling tank-to-wheels greenhouse gas emissions approximately 23% below an equivalent diesel.

Description Modelling of an automotive natural gas engine for A/F control investigations FB2

To meet North American EPA standards, the engine calibration and compression ratio were changed. Modeling the internal combustion engine A flexible and computationally economical model of the internal combustion engine was developed for use on large digital computer systems.

It is based on a system of ordinary differential equations for cylinder-averaged properties. The computer program is capable of multicycle calculations, with some parameters varying from cycle to cycle, and.

A 2-liter engine at 1% CO doesn't spew nearly the same total emissions as a liter engine at the same CO level. Grams-per-mile is the only effective way to measure this.

Also, keep in mind that grams-per-mile changes the way some gases appear. The exhaust system of an automotive internal combustion engine was connected to the generator element of an absorption refrigeration system.

The performance of the absorption refrigerator was evaluated as a function of the supplied heat. The use of a control strategy for the engine exhaust gas mass flow rate was implemented to optimize the system.

Stationary gas engines, typically fuelled by natural gas or propane, are widely used for prime power and for gas compression. In gas compression, the types of engines are either rich-burn or lean-burn.

Rich-burn engines have an air-to-fuel ratio that is balanced, resulting in an exhaust O 2 content of about %. Lean-burn gas engines have an.

Review of Natural Gas Models 1 September Introduction. The Natural Gas Transmission and Distribution Module (NGTDM), a component of the U.S. Energy Information Administration’s (EIA’s) National Energy Modeling System (NEMS), is currently undergoing a redesign. In support of the redesign effort, this report provides a review of other.

Basics of the gasoline engine.- Fuels.- Cylinder-charge control systems.- Gasoline injection systems over the years.- Fuel supply.- Manifold fuel injection.- Gasoline direct injection.- Operation of gasoline engines on natural gas.- Ignition systems over the years.- Inductive ignition systems.- Ignition coils.- Spark plugs.- Electronic control.

Engines which burn coal or coal pyrolysis products are attractive, but ignition delay and metal erosion problems continue to limit high speed operation of such engines.

Further, the throttled spark ignition engine often used with methanol and natural gas does not prove an efficient or tolerant device for the combustion of a wide range of fuel. A governor, or speed limiter or controller, is a device used to measure and regulate the speed of a machine, such as an engine.

A classic example is the centrifugal governor, also known as the Watt or fly-ball governor on a reciprocating steam engine, which uses the effect of inertial force on rotating weights driven by the machine output shaft to regulate its speed by altering the input flow.

- Control of gasoline engines, control of air/fuel, ignition, knock, idle, coolant, adaptive control functions - Control of diesel engines, combustion models, air flow and exhaust recirculation control, combustion-pressure-based control (HCCI), optimization of feedforward and feedback control, smoke limitation and emission control.

This book is. Chapter 25 Evaporative Emission Control Systems Chapter 26 Exhaust Gas Recirculation Systems Chapter 27 Positive Crankcase Ventilation and Secondary Air-Injection Systems Chapter 28 Catalytic Converters Chapter 29 Ignition System Operation and Diagnosis Chapter 30 Scan tools and Engine Performance Diagnosis Natural gas engines can operate at lean burn and stoichiometric conditions with different combustion and emission characteristics.

In this paper, the CNG engines research and development fueled using CNG are highlighted to keep the output power, torque and emissions of natural gas engines comparable to their gasoline or diesel counterparts. Sec. Spark Ignition Engines where 'Y is the ratio of specific heats, cilcu' and M is the molecular weight of the gas; as is of the order of to m s- for typical temperatures in internal combustion engines.

For a cylinder 10 cm in diameter, the time required for a pressure disturbance. A machine (or mechanical device) is a mechanical structure that uses power to apply forces and control movement to perform an intended action. Machines can be driven by animals and people, by natural forces such as wind and water, and by chemical, thermal, or electrical power, and include a system of mechanisms that shape the actuator input to achieve a specific application of output forces.

According to the type of fuel used- (a) Petrol engine, (b) diesel engine, (c) gas engine (CNG, LPG), (d) Alcohol engine (ethanol, methanol etc) 3. According to the number of strokes per cycle- (a) Four stroke and (b) Two stroke engine 4.

According to the method of igniting the fuel- (a) Spark ignition engine, (b) compression.

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The methane number input at the ECU (Engine Control Unit) can be used by the engine builder to continuously optimise the spark ignition timing and other engine actuators. Using the new CMR NIRIS NG sensor reduces consumption levels of natural gas-powered engines through the real time measurement of fuel quality.

Contributed by the Internal Combustion Engine Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the ICE Division, December 1, ; final revision received September 1, Associate Editor: D.

Assanis. Spark Ignition Natural Gas Engines 20 The Influence of Natural Gas Composition on Combustion 22 Ignition Characteristics of Methane and Higher Alkanes 25 Knock Rating of Natural Gas and Methane Number 26 End-Gas Chemical Kinetics 27 Global Reactions 29 Autoignition Modeling in SI Engines reciprocating engines as their prime movers for the generators.

To enhance service continuity, these generators use a continuous source of natural gas as their fuel supply. Cogen plants generally have higher power conver sion efficiencies and produce lower carbon emissions. The growing impact of adverse weather conditions such as hurricanes and.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.for small and large gas engines alike.

Constant attention to product develop-ment and manufacturing quality prompt users around the world to turn to Altronic control products to meet their natural gas engine air/fuel ratio control, speed gover-ning, and starting system requirements.

Details Modelling of an automotive natural gas engine for A/F control investigations FB2

The pages that follow will give you a solid. ASE – Automotive Service Excellence. ASM – Acceleration Simulation Mode. ASR – Acceleration Slip Regulation EEC – Electronic Engine Control (Ford) EEC-I – Control of Ignition Timing NGV – Natural Gas Vehicles.

Nm – Newton Meters. NOx – Oxides of Nitrogen. NTC – Negative Temperature Coefficient.