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High Efficiency IC Engines, 2012

2012-04-13
The 14 papers in this technical paper collection discuss high efficiency IC engines. Topics covered include engine downsizing, pressure boosting and turbocharging, intelligent combustion, low temperature and stratified charge, advanced fuel injection technologies, and more. The 15 papers in this technical paper collection discuss high efficiency IC engines. Topics covered include engine downsizing, pressure boosting and turbocharging, intelligent combustion, low temperature and stratified charge, advanced fuel injection technologies, and more.
Collection

Fuel Injection and Sprays, 2018

2018-04-03
This collection is devoted to experimental and computational work in the area of fuel injection systems and sprays. Topics include: spray characterization, cavitation, multi-phase jet modeling, CFD models for spray processes, wall films and impingement, hydraulic circuit analysis, and dissolved gas effects.
Collection

Fuel Injection and Sprays, 2017

2017-03-28
This collection is devoted to experimental and computational work in the area of fuel injection systems and sprays. Topics include: spray characterization, cavitation, multi-phase jet modeling, CFD models for spray processes, wall films and impingement, hydraulic circuit analysis, and dissolved gas effects.
Video

DPF's Regeneration Procedures and Emissions with RME Blend Fuels

2012-06-18
The fatty acid methyl esters (FAME's) - in Europe mostly RME (Rapeseed methyl ester) - are used in several countries as alternative biogene Diesel fuels in various blending ratios with fossil fuels (Bxx). Questions often arise about the influences of these biocomponents on the modern exhaust aftertreatment systems and especially on the regeneration of Diesel particle filters (DPF). In the present work different regeneration procedures of DPF systems were investigated with biofuels B0, B20 & B100. The tested regeneration procedures were: passive regenerations: DOC + CSF; CSF alone, active regenerations: standstill burner; fuel injections & DOC. During each regeneration on-line measurements of regulated and unregulated emission components (nanoparticles & FTIR) were conducted. It can be stated that the increased portion of RME in fuel provokes longer time periods to charge the filter with soot.
Technical Paper

Further Investigation of Fuel Injection in an Engine Having Spark Ignition

1932-01-01
320026
THIS INVESTIGATION of fuel injection with spark ignition is a continuation of work previously reported,3 which was carried on in the aeronautic-engine laboratory of the Massachusetts Institute of Technology. Although a four-cycle engine was used, the fuel was injected during the compression stroke so that the results might be applicable to the two-stroke cycle without possibility of loss of fuel through the exhaust. Among the effects studied were those of stratification and of late injection or late ignition as a means of controlling detonation with high compression. Fuels used were aviation gasoline, ordinary Diesel fuel and hydrogenated fuel oil, the last seeming to offer interesting possibilities. Directed turbulence was found to be essential for good distribution of the fuel in the cylinder and satisfactory operation of the engine.
Technical Paper

Fuel Injection with Spark Ignition in an Otto-Cycle Engine

1931-01-01
310005
THIS investigation was carried out in the aeronautical-engine laboratory at the Massachusetts Institute of Technology to determine the practical value of the use of a fuel-injection system in place of a carbureter on an Otto-cycle engine using spark ignition. Gasoline was used for most of the investigation, but comparative tests were also made using fuel oil. The equipment used was a single-cylinder laboratory-test engine and such other apparatus as was necessary for a complete performance test. A Diesel-engine injection-pump was used. A Diesel-type injection valve was used for injection into the inlet manifold, and a valve of special design, giving fine spray and little penetration, was used for the tests in which the injection was into the cylinder.
Technical Paper

RECENT DIESEL-ENGINE DEVELOPMENTS

1925-01-01
250038
What the Diesel engine has done, its possibilities of development and future application to automotive service are major topics of the paper. When modified for automotive use, the author asserts that the Diesel engine would not only allow the burning of cheaper fuel and provide greater fuel economy, but give immediate opportunity to use the two-stroke cycle; that is, it would generate about twice the power for an equal weight of mechanism, compared with present power attainment. In addition, the two-stroke cycle makes possible partial or entire elimination of exhaust-valves, exhaust through ports being better in every respect, and the Diesel-engine principle affords the possibility of a two-stroke-cycle double-acting engine in which, theoretically, four times the power of the present gasoline engine would be available.
Technical Paper

Measuring Rate of Fuel Injection in an Operating Diesel Engine

1953-01-01
530251
UNKNOWN factors regarding fuel-injector performance have handicapped diesel-engine combustion studies in the past. Rate at which fuel is introduced into the engine cylinder and quantity of fuel available for combustion at any instant were two basic unknowns hindering advance. This paper presents results of an investigation aimed at measuring fuel-injector performance in a firing engine, simultaneously with obtaining pressure-time curves and other needed data. Method and instrumentation developed covers three characteristics of injector performance: 1. Rate of fuel injection. 2. Fuel-injection timing. 3. Injection pressures. The method results in obtaining more comprehensive data, but has the disadvantage of added complexities requiring skilled handling.
Technical Paper

ELECTROJECTOR—BENDIX ELECTRONIC FUEL INJECTION SYSTEM

1957-01-01
570060
THIS paper discusses the new Electrojector which is Bendix's answer to the fuel injection problem for passenger-car installation. Their approach includes an electronically controlled and electrically actuated system. Details of this fuel injection system, such as the solenoid valves, are given here. Fuel supply to the engine during performance, especially in cold weather, is evaluated.
Technical Paper

FUEL INJECTION for Spark-Ignited Automotive Engines

1949-01-01
490181
THIS paper describes available injection systems for spark-ignition engines. In the near future, the authors predict, simplified injection pump designs, probably of the single-plunger type, will be universally available for both compression-ignition and spark-ignition engines. The authors also say that recent developments in injection system components substantiate the claims of the injection equipment suppliers that they will meet the demands for low-cost equipment.
Technical Paper

High-Speed C-I Engine Performance; Three Types of Combustion Chamber

1935-01-01
350111
MIXING of the fuel and air presents the major problem in maintaining high efficiency at low excess-air percentages in the high-speed compression-ignition engine. The outputs obtained from a single-cylinder 5 by 7-in. test-engine with three types of combustion chamber are compared and their respective characteristics discussed. Airflow is depended upon for mixing the fuel and air in the pre-chamber engine. Performance is shown to be influenced by clearance distribution, connecting-passage size, pre-chamber shape, location of the fuel spray, and boosting. The integral, or quiescent combustion chamber depends upon multiple sprays properly proportioned and directed to reach the available air. Results of an extensive series of injection-nozzle variations are shown in tabular form. The effects of scavenging and boosting and of high coolant-temperatures are discussed. Optimum performance showed either type to be inadequate for use as an aircraft powerplant.
Technical Paper

The Effect of WARTIME FUEL Developments Upon POST-WAR AUTOMOBILES

1944-01-01
440143
THE post-war automobile has received generous attention from the feature-story and human-interest writers, but little from the practical engineers who will build these cars. To bring a more realistic viewpoint into the post-war car picture, Mr. Colwell interviewed 81 of the leading oil and automobile engineers of America. He has formed a weighted average of the combined opinions of all the engineers consulted. Briefly, these conclusions are: 1. Immediately after the war, 1942 models will be built. No new models will be on the market for at least 18 months. 2. Although oil companies hope that eventually only two grades of gasoline will satisfy all demands, it appears that immediately after the war, four grades will be marketed: aviation, of 100 and 100-plus octane; premium, of 85-87 octane; regular, of 75-77 octane; and third grade, of 70 octane. 3. Compression ratio will go up, although ratios above 8:1 are not foreseen for the immediate future. 4.
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