scholarly journals Injection systems of high-speed diesel engines and development trends

2005 ◽  
Vol 123 (4) ◽  
pp. 19-30
Author(s):  
Kazimierz LEJDA
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
Internal Combustion Engines ◽  
Direct Injection ◽  
Spark Ignition Engine ◽  
Exhaust Emission ◽  
Total Efficiency ◽  
Negative Effects ◽  
Development Trends ◽  
High Speed Diesel

Current development of automotive industry is conditioned by the minimization of negative effects in relation to the environment. It results from the restrictions regarding exhaust emission limits which are introduced by the consecutive standards but it also guarantees market success of a given vehicle. Research carried out regarding customer preferences in UE countries have confirmed that during the purchase of a car they make decisions based on vehicle’s ecological properties and the safety of use in road conditions. Next such criteria follow as performance and durability which has so far been dominant. The analysis of the development trends of internal combustion engines clearly shows that the dominant engines are direct injection compression-ignition VGT engines. These engines have better work indices, significant values of total efficiency and most favorable ecological properties as opposed to spark-ignition engine. The obtainment of desirable utilization indices by diesel engine depends to a high degree from the injection systems applied in these engines. In the article characteristics of injection systems which are fitted in modern high-speed diesel engines as prime vehicle drive unit have been discussed. Systems with distributor injection pumps, with individual injection units and with pressure accumulators have too been presented. The requirements from injection systems have been qualified herein.

Evaluation of a Cyclone-Based Particulate Filtration System for High-Speed Diesel Engines

1994 ◽  
Vol 208 (4) ◽  
pp. 269-279 ◽  
Author(s):  
C Arcoumanis ◽  
L N Barbaris ◽  
R I Crane ◽  
P Wisby
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
Direct Injection ◽  
Operating Conditions ◽  
Exhaust Pipe ◽  
Filtration System ◽  
High Speed Diesel ◽  
Wide Range ◽  
Mass Flowrate ◽  
Particulate Filtration

A cyclone-based filtration system has been developed and its potential for reduction of exhaust particulates in high-speed direct injection diesel engines is evaluated; the filtration efficiency of the four cyclones has been enhanced by means of particulate agglomeration induced by cooling in a heat exchanger. With this system installed in the exhaust pipe of a 2.5 litre direct injection engine, tests covering a wide range of speed, load and exhaust gas recirculation (EGR) fraction resulted in reductions of up to 77 per cent in emitted particulate mass flowrate. The dependence of the system's performance on engine operating conditions, EGR configuration and cyclone geometry is presented and discussed.

Virtual High Speed Diesel Engine – A Simulated Experiment, Part I: Combustion Dynamics

2014 ◽  
Vol 659 ◽  
pp. 189-194
Author(s):  
Lidia Gaiginschi ◽  
Iulian Agape ◽  
Adrian Sachelarie ◽  
Mihai Alin Girbaci
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
Internal Combustion Engines ◽  
Combustion Process ◽  
Operating Regime ◽  
Combustion Model ◽  
Combustion Dynamics ◽  
Cycle Simulation ◽  
Simulated Experiment ◽  
High Speed Diesel

The research efforts in the direction of internal combustion engines functional cycle simulation, particularly for small capacity diesel engines, are justified by shortening the path between the new conceptual solution and its effects and also to reduce research costs. There can be adopted new organizational and management solutions for the combustion process after these, for example, confirm at the model level. This paper proposes an unizonal physico-mathematical combustion model in high speed small Diesel engines, based on a Vibe-type law and on the heat transfer through the combustion chamber walls modelated after Woschni. The complexity of the model justifies the name of „virtual engine”. This allows to determine the functional parameters as instantaneous and average values, at any engine operating regime. The simulated experiment takes place in perfectly controlled conditions and leads to good results. There are obtained, during the combustion process, dynamics of parameters concerning the vaporization characteristics, combustion characteristics and combustion kinetics, for any operating regime. The parameters are evolving in a predictable way, being experimentally confirmed.

CFD Analyses on 2-Stroke High Speed Diesel Engines

2011 ◽  
Vol 4 (2) ◽  
pp. 2240-2256 ◽  
Author(s):  
Carlo Alberto Rinaldini ◽  
Enrico Mattarelli ◽  
Valeri Golovitchev
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
High Speed Diesel ◽  
Cfd Analyses

Reducing Engine-Out Emissions for Medium High Speed Diesel Engines: Influence of Injection Parameters

2009 ◽  
Author(s):  
Pieter Roels ◽  
Yves Sledsens ◽  
Sebastian Verhelst ◽  
Roger Sierens ◽  
Lieven Vervaeke
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
Injection Parameters ◽  
High Speed Diesel

Characteristics of injection of diesel fuel, rapeseed oil and their mixtures in diesel engines of various types

2021 ◽  
pp. 167-178
Author(s):  
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Rapeseed Oil ◽  
High Speed ◽  
Fuel Injection ◽  
Experimental Studies ◽  
Fuel Injector ◽  
High Speed Diesel ◽  
Engine Type

The necessity of adapting diesel engines to work on vegetable oils is justified. The possibility of using rapeseed oil and its mixtures with petroleum diesel fuel as motor fuels is considered. Experimental studies of fuel injection of small high-speed diesel engine type MD-6 (1 Ch 8,0/7,5)when using diesel oil and rapeseed oil and computational studies of auto-tractor diesel engine type D-245.12 (1 ChN 11/12,5), working on blends of petroleum diesel fuel and rapeseed oil. When switching autotractor diesel engine from diesel fuel to rapeseed oil in the full-fuel mode, the mass cycle fuel supply increased by 12 %, and in the small-size high-speed diesel engine – by about 27 %. From the point of view of the flow of the working process of these diesel engines, changes in other parameters of the fuel injection process are less significant. Keywords diesel engine; petroleum diesel fuel; vegetable oil; rapeseed oil; high pressure fuel pump; fuel injector; sprayer

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