Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: wtryskiwacz elektromagnetyczny

Sortuj według:

Ogranicz wyniki do:

Optical tests as the basis for formulating mathematical models of the opening delay of CIDI injectors

Skowron M., Wisłocki K., Pielecha I.

Combustion Engines

2017

R. 56, nr 4

185--192

The main objective of this research was an attempt to evaluate the delay times of the actual needle opening of the diesel injectors in relation to the time of triggering the current control signals opening the solenoid and piezoelectric high-pressure injectors of diesel engines. The conducted tests take into account the variability of fuel injection pressure and backpressure prevailing in the operational chamber of the engine. To determine accurately the time of actual injection start, the optical tests analysing the image of the injector tip were used. Such high resolution images were obtained by high-speed recording with a frequency of 250 kHz (Dt = 0.004 ms). Based on a comparison of the results obtained, it was found that the maximum delay time of fuel injection for a piezoelectric diesel injector is about 12% shorter than for a solenoid injector. Experimentally obtained results of the injection time delay were used as a basis to formulate mathematical models describing the delay of the real fuel injection in relation to the signal controlling the opening of the diesel injectors. These models take into account the dependence of the injector reaction from the injection pressure and the backpressure in the operational chamber of the engine. The correctness of the obtained models is confirmed by acceptable values of the determination coefficient (for solenoid injector – 0.6, for piezoelectric injector – above 0.8 – for correlation of injection delay and backpressure).

Analiza porównawcza rozpylenia paliwa przez wybrane typy wtryskiwaczy paliw ciekłych

Skowron M., Pielecha I.

Logistyka

2015

nr 3

4439--4448, CD 1

W artykule omówiono zagadnienie rozpylenia paliwa w układach bezpośredniego wtrysku zarówno dla silników ZS jak i ZI. Przeprowadzono analizę porównawczą wtryskiwaczy ze względu na ich budowę. Celem artykułu było wskazanie tendencji rozwoju konstrukcji wtryskiwaczy i idących za tym zmian dotyczących rozpylenia i zasięgu strugi. Do tego celu przygotowano przegląd literaturowy zagadnienia dotyczący najnowszych rozwiązań oraz uzupełniono go o badania własne rozpylenia paliwa. Prace te wykonano dla wybranych konstrukcji wtryskiwaczy, a zarejestrowane obrazy poddano obróbce w celu ekspozycji charakterystycznych cech strugi paliwa z wtryskiwacza przystosowanego do konkretnego systemu spalania.

In this paper was discussed fuel spray issue in DI both for SI and CI engines. There was conducted comparative analysis of injectors in aspect of their construction. The main aim of article was to mention development trend in injection system construction and binding to them atomization improvement and relative stream range. To reach that aim literature review of issue was given and supplemented by own fuel atomization research. Those operations was performed for selected injector constructions and recorded images were treated image processing in aim to expose characteristic fuel stream attributes causing by adaptation for concrete combustion system.