operational principle of diesel engines

Ngày tải lên: 14/05/2016, 20:48

... art of the experimental and numerical methodologies applied to deepen the understanding of fuel injection system behaviour, for both gasoline and diesel engines Chapter describes the potential of ... design, analysis and optimization of diesel engines 143 Daniela Siano, Fabio Bozza and Michela Costa Chapter Hydrogen fuelled scramjet combustor - the impact of fuel injection  167 Wei Huang, ... Experimental study of spray generated by a new type of injector with rotary swinging needle  65 Hubert Kuszewski and Kazimierz Lejda Chapter Effect of injector nozzle holes on diesel engine performance ...

Ngày tải lên: 21/06/2014, 01:20

... Average uncertainties of some measured and calculated parameters S.No Parameters Speed Temperature Mass flow ratye of air Mass flow rate of diesel Mass flow rate of hydrogen Oxides of nitrogen Hydrocarbon ... formation of NO compared to the availability of oxygen In diesel engines the combustion is always leaner that results in the availability of more oxygen for the entire load spectrum of operation ... lower than those of diesel engine [13] Small amount of hydrogen peroxide may be found in the exhaust of the hydrogen-operated engine [14] Unburnt hydrogen may also come out of the engine, but...

Ngày tải lên: 05/09/2013, 15:28

... the event of sudden impact, thus switching off the pump If the switch has been activated, the reset button will be in the raised position A fuel rail is bolted to the lower section of the inlet ... hesitation and a general deterioration of driving characteristics Fuel tank - removal and refitting The procedure is as described in Part A of this Chapter for carburettor engines Throttle cable - adjustment, ... similar to that described in Part A of this Chapter for carburettor engines Accelerator pedal - removal and refitting The procedure is the same as described in Part A of this Chapter for carburettor...

Ngày tải lên: 25/01/2014, 02:20

Ngày tải lên: 26/05/2014, 15:16

... basic methods are: • ON/OFF Control by ECM • ON/OFF Control by Fuel Pump Switch • ON/OFF Two Speed Control with a Resistor • ON/OFF Two Speed Control with Fuel Pump ECU • ON/OFF Three Speed Control ... stops This turns off the transistor, thereby cutting off the flow of current to the L2 coil of the circuit opening relay As a result, the circuit opening relay opens turning off the fuel pump ... and the fuel pump switch is turned off This cuts off the flow of current to the L2 coil of the circuit-opening relay As a result, the circuit-opening relay goes off and the fuel pump stops operating...

Ngày tải lên: 28/05/2014, 14:24

... favour the penetration of a pulsed diesel spray The following are some of the most relevant: From the theory of gaseous sprays, (Dent, 1971) was one of the pioneers in the study of spray phenomena ... because the amount of energy dragged towards the fuel depend basically on the process of evaporation Liquid length of a diesel spray is a parameter of much interest in the study of the injectioncombustion ... analysis of the characterization of the liquid length of a diesel spray is approached Microscopic Characteristics The macroscopic description is characterized by the content of droplets of diverse...

Ngày tải lên: 20/06/2014, 11:20

... in Diesel Engines 35 Rayleigh scattering is of the elastic kind, where the size of particles is much smaller of that of the lights wavelength, for example the gas molecules The intensity of the ... characterization of diesel sprays, specifically in the study of the liquid phase penetration As mentioned in section 4, the techniques of measure to carry out studies of the liquid phase of diesel sprays ... Ultra-High-Speed Filming of Atomizing Jets, Physics of fluids, Vol 22, pp 1054-1064 Physics of Fluids Reitz R D y Bracco F V (1982) Mechanism of Atomization of a Liquid Jet, Vol 25 Physics of Fluids Schmalzing...

Ngày tải lên: 20/06/2014, 11:20

... value of the angle was virtually independent of the type of fuel used On the other hand, in the case of the RSN sprayer, the apex angle of the spray was dependent not only on the time of the ... performance of engines fitted with injectors of this type Variation in the conditions of injection (pressure changes in the gaseous medium into which fuel is injected, change due to use of fuels of differing ... University of Technology, Cracow, Poland Kuszewski, H & Lejda, K (2009) Experimental investigations of a new type of fueliing system for heavy-duty diesel engines, International Journal of Heavy...

Ngày tải lên: 20/06/2014, 11:20

... Stroke Direct Injection Diesel Engine Presearch Journal of Applied Sciences (11): 1165-1169 Semin., Bakar, R.A and Ismail, A.R (2007) Effect Of Engine Performance For Four-Stroke Diesel Engine Using ... requires a considerable investment in terms of time, as well as money, due to the need of fine tuning the operation of its components and, in particular, of the electronic fuel injector In this light, ... an image of the hole shape details, as shown in Figure (a) A hole (b) Z hole Fig Moulds of the control valve holes By means of imaging techniques it is possible to measure the r/d ratio of the...

Ngày tải lên: 20/06/2014, 11:20

... the solution of the equation of motion and heating of an individual droplet The technique of calculation of a two-phase flow is based on the solution of a conjugate problem of flow of the gas and ... iterations of the coordinate of the maximum value of the concentration of droplets at the outlet of the model within the limits of one mesh of the finite-difference grid The investigation of the ... the rate of change of Cv due to the interphase exchange The interphase source terms in the equations of conservation of momentum components are the components of the vector of the rate of change...

Ngày tải lên: 20/06/2014, 11:20

... concentration of a liquid fuel, kg m3; cf, coefficient of specific heat of liquid, J (kg�K); cpg, coefficient of specific heat of gas at constant pressure, J (kg�K); CR, coefficient of droplet ... heat of evaporation, J kg; md, mass of a droplet, kg; mf, mass fraction of kerosene vapors; nk, density of the number of particles with k monomers; Pr = µgcpg λg, Prandtl number; ��, R force of ... coefficient of air excess; Γ, coefficient of diffusion transfer of variable ; ∆td, time of droplet residence in the volume element, s; ∆v, elementary volume, m3; ε, rate of dissipation of turbulence...

Ngày tải lên: 20/06/2014, 11:20

... Advanced Diesel Engines? – Fuel Effects in “Premixed-Enough” compression ignition Engines , Towards Clean Diesel Engines, TCDE2009 Liu, A.B and Reitz, R.D (1993) "Modeling the Effects of Drop ... “Prediction and Optimization of the Performances, Noxious Emissions and Radiated Noise of a Light Duty Common-Rail Diesel Engine”, proceedings of 9th International Conference on Engines and Vehicles ... characteristics of the engine, an optimization procedure is carried out to the aim of finding a better selection of some geometrical and operating parameters In particular, a different phasing of both...

Ngày tải lên: 20/06/2014, 11:20

... temperature of the diesel microwave plasma flame in terms of oxygen content Fig Axial temperature profiles of the plasma flame in terms of O2 content (%) at 0.019 lpm diesel Total flow rate of mixture of ... vicinity of the upper wall of the combustor Because of the variation in the fuel injection location and the effect of the shock wave, small eddies are formed in both the upper and lower cavities of ... temperature profiles of the diesel microwave plasma flames measured axially by a thermocouple in terms of oxygen content (%) at L-0.5, L0, L3, and L6 in Fig 3(a) The total flow rate of the mixture...

Ngày tải lên: 20/06/2014, 11:20

... the relative diameter of the bell and the hopper and the length of the bell, all influence the form of distribution of solid materials in the oven hopper The specific weight of the materials in ... porosity of the charge depends on the shape and dimensions of the pieces being used, with greater porosity being associated with spheres of equal size, tangent and centers at the vertices of a cube ... represent 52.3% of volume If the spheres were of equal tangent, but with centers at the vertices of a rhomboid, the empty spaces would be 47.7% at most In practice, the pieces of ore are not spherical...

Ngày tải lên: 20/06/2014, 11:20

... process of the hydrate dissociation is a process of the temperature decrease in the presence of the brine solution The duration of the hydrate dissociation is shortened and the degree of the depth of ... increase of the temperature of injected hot water at the wt% salinity For the case of the injection of hot brine solution, the thermal efficiency and the energy ratio increase with the increase of ... injection to the end of hydrate dissociation Onset time for hydrate dissociation is the starting point of section III, and the duration of hydrate dissociation is the length of time of section III...

Ngày tải lên: 20/06/2014, 11:20

... calculates injected fuel quantity, start of injection, duration of injection, and rate of discharge curve, as well supervises the correct functioning of the injection system as a whole COMMON ... When the electric fuel pump is switched off, the supply of fuel is interrupted and the engine stops PRE SUPPLY PUMP The electric fuel pump comprises of: 1.Electric Motor 2.Roller-Cell Pump 3.Non ... Demand On Modern Diesel Engine Development • Low fuel consumption • Low pollutant emissions • Quiet running engines • Improved engine performance Common rail...

Ngày tải lên: 20/06/2014, 17:41

... in Diesel Engines 35 Rayleigh scattering is of the elastic kind, where the size of particles is much smaller of that of the lights wavelength, for example the gas molecules The intensity of the ... characterization of diesel sprays, specifically in the study of the liquid phase penetration As mentioned in section 4, the techniques of measure to carry out studies of the liquid phase of diesel sprays ... Ultra-High-Speed Filming of Atomizing Jets, Physics of fluids, Vol 22, pp 1054-1064 Physics of Fluids Reitz R D y Bracco F V (1982) Mechanism of Atomization of a Liquid Jet, Vol 25 Physics of Fluids Schmalzing...

Ngày tải lên: 21/06/2014, 01:20

... Advanced Diesel Engines? – Fuel Effects in “Premixed-Enough” compression ignition Engines , Towards Clean Diesel Engines, TCDE2009 Liu, A.B and Reitz, R.D (1993) "Modeling the Effects of Drop ... “Prediction and Optimization of the Performances, Noxious Emissions and Radiated Noise of a Light Duty Common-Rail Diesel Engine”, proceedings of 9th International Conference on Engines and Vehicles ... characteristics of the engine, an optimization procedure is carried out to the aim of finding a better selection of some geometrical and operating parameters In particular, a different phasing of both...

Ngày tải lên: 21/06/2014, 01:20

... power of 1.2 kW In case of SF6, we achieved a DRE of more than 99.9% in the mixture of 0.1 lpm SF6, 120 lpm N2, 30 lpm O2 and 15 lpm CH4 by at the applied microwave power of 1.4 kW Also, DRE of ... flame of the kerosene or diesel injected into the torch plasma does not produce its own soot In this context, the plasma flame can also be useful for the elimination of soot from diesel engines ... context, DRE of CF4 was decreased drastically in terms of over 60 lpm N2 flow It is apparent that the abatement of CF4 is much more difficult than that of SF6 For instance, the DRE of SF6 is more...

Ngày tải lên: 21/06/2014, 01:20