A simulation code of an electro-injector for diesel engines is presented with the preliminary parametric analysis carried out with the code. The simulation code is based upon the concentrated volume method as for the chambers of the system. Energy and flow rate conservation equations and dynamic equations are used for the movable parts of the system under stress or friction. The magnetic force acting on the electro-injector actuator has been calculated by means of a finite element simulation. The one-dimensional code simulated the propagation in feeding pipes and the control of the electro-injector. The program, in fact, uses the method of the characteristic equations to solve conservation equations, simulating the propagation in a pipe between two chambers. The sensitivity analysis has pointed out that the parameters that are influenced by the propagation in the pipes are: needle lift, injected flow rate, pressure in each chamber, and volume. The perturbations reduce the effective pressure of injection and are influenced by pipe lengths and diameters.

Issue Section:
Internal Combustion: Diesel
Topics:
Computer simulation, Diesel, Ejectors, Pipes, Simulation, Flow (Dynamics), Pressure, Actuators, Diesel engines, Equations of motion, Finite element analysis, Friction, Magnetic fields, Needles, Sensitivity analysis, Stress
1.
Matsuoka, S., Yokota, K., Kamimoto, T., and Igoshi, M., “A Study of Fuel Injection System in Diesel Engines,” SAE Paper No. 851583, 1989.
2.
Ficarella
A.
, and
Laforgia
D.
, “
Fluid Dynamic Phenomena in Fuel-Injection Systems
,”
MTZ
, Vol.
52
, No.
1
,
1991
, pp.
28
–
35
.
3.
Ficarella, A., and Laforgia, D., “Contribution to the Simulation of Injection System for Reciprocating I.C. Engine,” SAE Paper No. 885016, 1988.
4.
Ficarella
A.
, and
Laforgia
D.
, “
Investigation and Computer Simulation of Diesel Injection System With Rotative Pump
,”
ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
,
1990
, Vol.
112
, pp.
317
–
323
.
5.
Ficarella
A.
, and
Laforgia
D.
, “
Injection Characteristics Simulation and Analysis in Diesel Engines
,”
Meccanica, International Journal of AIMETA
, Kluwer Academic Publishers, Vol.
28
,
1993
, pp.
239
–
248
.
6.
Catania
A. E.
,
Dongiovanni
C.
, and
Mittica
A.
, “
Implicit Numerical Model of a High Pressure Injection System
,”
ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol.
114
,
1992
, pp.
534
–
543
.
7.
Digesu’, P., Ficarella, A., Laforgia, D., Bruni, G., and Ricco, M., “Diesel Electro-injector: A Numerical Simulation Code,” SAE Paper No. 940193, Fuel Spray Technology, SAE SP-1026, pp. 51–64.
8.
Schmitt, Th., “Untersuchungen zur Stationaren und Instationaren Stromung durch Drosselquerschnitte in Kraftstoffeinspritzsystemen von Dieselmotoren,” Forschungsbericht 2-226/2, 1966.
9.
Gibson, D. H., “A Flexible Fuel Injection Simulation,” SAE Paper No. 861567, 1986.
10.
Hardenberg, H., “Die Nadelhubabhaugigkeit der Dyrchflußbeiverte von Lochdusen fu¨r Direkteinspritzdieselmotoren,” MTZ, Vol. 46, No. 4, 1985.
11.
Andoh, H., and Shiraishi, K., “Influence on Injection and Combustion Phenomena by Elimination of Hole Nozzle Sac Volume,” SAE Paper No.860416, 1986.
12.
DERECO, “Experimental Evaluation of Flow Coefficient of Fuel Injectors at Different Pressure Drop, Backpressure and Needle Lift,” Technical Report No. 185/85, 1985.
13.
Pischinger
R.
,
Staska
G.
, and
Gao
Z.
, “
Berechnung des Einspritzeverlaufes von Dieselanlangen bei Kavitation
,”
MTZ
, Vol.
44
,
1983
, p.
11
11
.
14.
Parson
M. G.
, and
Harkins
R. W.
, “
Investigation of Fuel Injection System Cavitation Problems on the MV J. R. Baker, MV M. Miner, and MV W. R. de Lancey
,”
Marine Technology
, Vol.
22
(
3
),
1985
, pp.
219
–
237
.
15.
Marcic, M., and Kovacic, Z., “Computer Simulation of the Diesel Fuel Injection System,” SAE Paper No. 851583, 1985.
16.
Buchlin, J. M., “Two Phase Flow,” Course Note 131/EA, VKI, Bruxelles, Oct. 1988.
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