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Saturday, August 1, 2020 | History

2 edition of Several possible paths to improved part-load economy of spark-ignition engines found in the catalog.

Several possible paths to improved part-load economy of spark-ignition engines

A. E. Cleveland

Several possible paths to improved part-load economy of spark-ignition engines

by A. E. Cleveland

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  • 21 Currently reading

Published by Society of Automotive Engineers in New York .
Written in English


Edition Notes

Statementby A.E. Cleveland and I.N. Bishop.
ContributionsBishop, I. N., SAE National Automobile Week (1960 : Detroit)
The Physical Object
Pagination(3), 28p. :
Number of Pages28
ID Numbers
Open LibraryOL13711328M

The Spark Engine (book) Book The Spark Engine. Used by teams and in business settings of all kinds, this book describes creative exercises that foster team-building and warm up the right side of your brain - the creative side. Grab a pencil, a marker, or a pen, and get started. Share these exercises with your team, and enjoy the creative energy.   Sevik J, Pamminger M, Wallner T, Scarcelli R, Boyer B, Wooldridge S, Hall C, Miers S () Influence of injector location on part-load performance characteristics of natural gas direct-injection in a spark ignition engine. SAE Int J Eng 9(4)– CrossRef Google Scholar.

the turbocharged DI spark-ignition engine (DISI) or a higher DF to be used, again to the benefit of part-load fuel economy. Various supporting technologies have been developed and productionized such as the adoption of pulse-divided exhaust manifolds in 4- and even 8-cylinder engines [4,5], the use of. @article{osti_, title = {Devices to improve the performance of a conventional two-stroke spark ignition engine}, author = {Poola, R B and Nagalingam, B and Gopalakrishnan, K V}, abstractNote = {This paper presents research efforts made in three different phases with the objective of improving the fuel economy of and reducing exhaust emissions from conventional, carbureted, two-stroke.

Actually, the best economy mixture is that which delivers the lowest value in pounds of fuel per horsepower per hour for the engine as a whole, a term defined as the engine's brake specific fuel consumption, or b.s.f.c. Piston engine b.s.f.c. values can range from about to lb./hp/hr. and vary with mixture, manifold pressure, RPM. @article{osti_, title = {Improving the fuel economy of stoichiometrically fueled S.I. engines by means of EGR and enhanced ignition -- A comparison of gasoline, methanol and natural gas}, author = {Neame, G R and Gardiner, D P and Mallory, R W and Rao, V K and Bardon, M F and Battista, V}, abstractNote = {This paper describes an experimental study in which the potential for fuel economy.


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Several possible paths to improved part-load economy of spark-ignition engines by A. E. Cleveland Download PDF EPUB FB2

several possible paths to improved part-load economy of spark-ignition engines Due to the many losses in the conversion of heat to mechanical energy a gallon of fuel provides less than 1/4 of its mechanical equivalent of useable energy at the by: 8. Replacing spark-ignition engines with diesel engines and components would yield fuel savings of about 37 percent at an added cost of approximately $5, per vehicle, and replacing spark-ignition engines with hybrid engines and components would reduce fuel consumption by 43 percent at an increase of $6, per vehicle.

Combustion flame directly influences the fuel economy, engine performance and efficiency. Currently, many of the flame geometry calculation methods assume certain specific chamber and piston top shapes and make some approximations to them.

Even further, most methods can not handle multiple spark plug by: 3. A similar example to that given in Fig. 6 for fuel economy at part load conditions is given for a variable displacement engine application in Fig.

Consider a vehicle with a four stroke SI engine operating at maximum efficiency at MPa BMEP and rpm (point indicated with a star in Fig.

5).Cited by: One of the disadvantages of spark ignition engines, whose power is regulated by throttling, is the increased fuel consumption at low loads and when the engine is idle.

The combined method of engine power regulation by switching off the cylinder group and throttling working cylinders is one of the effective ways to improve fuel economy in the. For engines of the future to become more fuel efficient it will be necessary to reduce power cylinder friction.

To be able to reduce the friction it is important to fully understand it. This paper is a review of power cylinder friction with a specific emphasis on diesel engines. have as much engine test data as possible. Spark ignition engine part load fuel economy improvement: Numerical consideration Internal combustion engines have several disadvantages, but.

Concern about the reduced availability and the increased cost of petroleum fuels prompted great efforts in recent years to reduce the fuel consumption of auto­ mobiles. The ongoing efforts to reduce fuel consumption have addressed many relevant factors, including increased engine performance.

1. Introduction. Inthe International Energy Agency, in conjunction with the Global Fuel Economy Initiative, published a report which addresses their long term goal as a 50% reduction in global average emissions by the year Policy changes, enhanced technologies, revised fuels and reduced vehicle and engine size are indicated as possible ways to improving vehicles fuel economy.

The part load pumping losses partially account for the poor economy of SI engines when compared to diesel engines, which do not require throttling to operate at part load. If the area of the pumping loop can be reduced for a given engine output, less work will be expended in the gas exchange process and a corresponding reduction can be made in.

re-optimisation of spark ignition engines The power output and fuel economy of spark ignition engines is usually optimised for full throttle operation. The work described here is aimed at improving the part load performance of spark ignition engines, the.

Compared with the throttled spark ignition engine, the brake specific fuel consumption of the improved unthrottled spark ignition engine is reduced by % to %. View Show abstract. The differences between spark ignition and compression ignition engines arise from the means of ignition and mixture preparation.

In spark ignition engines the mixture of air and fuel is prepared prior to induction, and this leads to pre-mixed combustion in which a flame front propagates across the combustion chamber. Fuel Economy: in Road Vehicles Powered by Spark Ignition Engines David Cole (auth.), John C.

Hilliard, George S. Springer (eds.) Concern about the reduced availability and the increased cost of petroleum fuels prompted great efforts in recent years to reduce the fuel consumption of auto­ mobiles.

The RadMax spark-ignition engine is an internal-combustion engine based on the RadMax rotary design and fueled by gasoline, natural gas, ethanol or other fuel requiring spark to initiate combustion.

Due to combustion chamber geometry and the required compression ratio of toit will typically utilize 9 to 10 vanes, creating 18 to A novel device for controlling the compression pressure of an internal combustion engine is disclosed.

The combustion chamber of each cylinder of the engine is divided into two virtual spaces, a gas exchange space and a control space. The intake and exhaust valves move in a plane substantially perpendicular to the cylinder centerline and open into the gas exchange space.

Development trends in spark ignition engines. Spark ignition engines are expected to continue as the predominant automotive power plants. The main evolutionary influences on their design are fuel economy, emissions, performance, size, weight and marketability.

weight and marketability. These influences will lead to improved cylinder filling. This paper describes some results of the research in the area of multiple spark ignition engines. Dual spark ignition system has proved their potential in improving the performance of the engines and improved emissive characteristics as compared with the single spark plug ignition system.

The manuscript. — Madras, India: Argonne National Labomtop. — 21 ct This paper presents research efforts made in three different phases with the objective of improving the fuel economy of and reducing exhaust emissions from conventional, carbureted, two-stroke spark ignition (SI) engines, which are widely employed in two-wheel transportation in India.

Improvements in internal combustion engine efficiency can be achieved with proper thermal management. In this work, a simulation tool for the preliminary analysis of the engine cooling control is developed and a model-based controller, which enforces the coolant flow rate by means of an electrically driven pump is presented.

The controller optimizes the coolant flow rate under each engine. Summarize the differences between the gas exchange processes under motoring and firing conditions for a spark-ignition engine at a fixed part-load throttle setting that will result in the pumping.3. Spark Ignition: Its Physics and Effect on the Internal Combustion Process.- 4.

Effects of Valve Events on Engine Operation.- 5. Flame Propagation and Heat-Transfer Effects in Spark Ignition Engines.- 6. Abnormal Combustion Effects on Economy.- 7. Mechanical Friction and Lubrication In Automobiles.- 8. Tire Rolling Resistance and Vehicle Fuel.Fuel Economy and Emissions Spark Ignition: Its Physics and Effect on the Internal Combustion Process Effects of Valve Events on Engine Operation Flame Propagation and Heat-Transfer Effects in Spark Ignition Engines Abnormal Combustion Effects on Economy Mechanical Friction and Lubrication In Automobiles