The determination of the injections duration for the model suggested by the authors.

Blaga, Vasile ; Bara, Lucian ; Bara, Camelia 等

1. INTRODUCTION

The system suggested by author's main task is the correlation establishment between the mass of the engines inhaled air and the mass of the injected combustibles on cycle forming a mixture of maximum economically for the engines each workings conditions. For model of system proposed from author was proposed one system from injection of gasoline Bosch Motronic who power for air with ultrasonor wave. It be used plate from acquisition from trial, program from acquisition from date, electrical sounder from temperature, electrical sounder from pressure, electrical sounder from revolution and position angular, analyzer from gas. It is be make one study for select excess coefficient from air [lambda]=1 (electronic dosage) (Baraga, 2000); (Apostolescu & Chiriac, 1998). The electric injection systems the dependence between the injected gasoline quantity on cycles at engines each work conditions and the injectors opening time establishes in adherence to the evidence stall, with control units manually operated according to the effective engine moment and the minimum polluted emissions (carbon monoxide, hydrocarbon, nitrogen, oxide) after wards this is motorized in the injection. The adjustment of the injected petrol quantity on cycle for the different engines working conditions depend on the inhaled air quantity thanks to the air debit meter which is equipped with a sounder which transmits information in regard of the airs debit to the calculator. In figure 1 is presented the combustibles feeding scheme of the Renix system, used to the molding of the system suggested by the authors. The air debit meter with palette and a sounder element are with an air debit meter of Karman Vartex type that improves the engines performance. A study of the choosing of the airs excess coefficients. It is made the pressure regulator; it is molded; the pressure regulator constant it is determinate. The electromagnetic injectors molding. It is made and it is calculated the injections duration. The molding of engine with spark lighting cycles with gasoline injection supposed by the authors is carried out by the 3-D dimensional and by dimensional parameters in two cases in figure 2 and 3.

[FIGURE 1 OMITTED]

[FIGURE 2 OMITTED]

[FIGURE 3 OMITTED]

2. THE THEORY FROM CALCULATION

A delicate problem from point of program on the computer, adiabatic coefficient is it starting calculation, temperature in different point is unknown and the adiabatic exponents not can be determinable. For solution of this problem has been used at impose to some value, found initial more correct, who permit a cycle crossing and determination more precise temperature, (Blaga, 2000). The temperature at the finished admission [T.sub.a] was to consider known as initial date and she's expression calculation it be used at the finished as equation from verify at finished the cycle. Through calculate again of adiabatic exponent on amount foundation temperatures to get from the new cycle (Grunwald, 1980). In this mode, through some cycle the error can be reduce upside a calculate estimate admit in a thermal calculus very pretentious. Must be introductory simplify hypothesis that one with starting burning at finished corresponding thermal agent composition it is instantaneous beckoning that finished corresponding the excess coefficient from air [lambda] with who are place burning combustible. It be to achieve a experimental equipment for try the propose model by the author, gifted with device and electrical sounders necessary of modeling.

3. THE PROPOSE CONTRIBUTIONS

It be realize a program from calculate parameter spark ignition engines with electronic injection from gasoline with subrogates:

--the program from calculate to parameter spark ignition engines with electronic injection from gasoline (dependence after revolution n and excess coefficient of air [lambda] at temperature ambient medium [t.sub.o] = -35 ... + 45[degrees]C and pressure ambient medium [p.sub.o] = 1 x [10.sup.2] kPa);

--the program from calculate to parameter spark ignition engines with electronic injection from gasoline (dependence after revolution n and temperature ambient medium [t.sub.o] at excess coefficient of air [lambda]=1 and pressure ambient medium [p.sub.o] = 1 x [10.sup.2] kPa) (Blaga, 2000).

--debit meter point of cycle, coefficient from fill, dosage, measure thermal combustion of unity cylinder engine, rapport from grow of pressure in isochors combustion, rapport growth volume in post burning, the technical-economical of driving and duration injection (Blaga, 2005).

It be representation 3-D variation of parameter technical-economic of model proposed with revolution engine and temperature ambient medium. It be to achieve a comparation between the calculate and measured of duration injection and angle injection with revolution growth from at 500 at 6500 rot/min, of engine with electronic injection gasoline type Bosch Motronic. It be realization one comparation between diagram theoretic from cycle proposed by the author and diagram of engine with electronic injection of gasoline, that was obtain one the experimental installation.

It is to effect calculation error and the correction factor face atmospheric condition from reference, on the engine electronic injection of gasoline system. For engines fitting out with propose from author it well be raise on engine stall, from foundation diagram 3-D for duration injection, angle from kindling at total load and partial load and enrichment coefficients at total load.

Investigation realized to be continue for determine mechanical loss at electronic injection of gasoline, in domain little revolution (Negrea & Sandu 2000).

4. REFERENCES

Apostolescu, N. & Chiriac, R., ( 1998). The Process of burning in driving with inward alight, The Technical Publishing House, ISBN 973-31-0646-1, Bucharest.

Bataga, N. (2000). Driving with inward aligh,. The Didactic and Pedagogical Publishing House, 973-9471-20-X, Bucharest.

Blaga, V. (2000). The modeling injection from gasoline at engines with spark lightning through sparking, The Publishing House of University from Oradea, ISBN 973-8083-41-9, Oradea.

Blaga, V. (2005). Engine with gasoline injection, The Publishing House of University Edition Oradea, ISBN 973--613-981-6, Oradea.

Grunwald, B. (1980). The Theory, calculation and construction engine's for road motor vehicle, The Didactic and Pedagogical Publishing house, Bucharest.

Negrea, V.D. & Venecia Sandu (2000). The combating of medium pollution in motor vehicle, The Technical Publishing House, ISBN 973-31-1455-3 Bucharest.