Injectors Flashcards
to achieve complete ______diesel fuel must be changed from a liquid state to a fine _______spray
combustion
atomized
true or false
diesel in its liquid state can be easily ignited
false
name 4 types of injectors
pintle
pintaux
single hole
multihole
Miraldo says the main function of the diesel injector is is to ensure fuel is injected into the combustion chamber at the correct pressure and spray pattern. Pato disagrees and says the injector function is stop Injecting fuel fuel as soon as the injector pump pressure drops. who is correct in this scenario?
Both
Name 5 major parts of the Injector
Injector Spring, Needle Valve, Nozzle, High Pressure Chamber, Injector Body
singlehole injectors are _______ and ________ than other types of injectors
simpler, cheaper
a singlehole injectors have a single_______ drilled through the nozzle tip
hole
the main disadvantage of a single hole injector is its?
poor spray pattern - leading to heavy fuel consumption and unburnt gases
multihole Injectors are often fitted to _________ CI Engines
direct injection
3 main advantages of a multihole injector over a single hole injector are?
- better atomization
- better distribution of fuel
- reduction of unburnt fuel
in an indirect injection CI engine atomized fuel is sprayed into an __________ rather than the actual combustion chamber
ante chamber
describe what is a pintle injector
an injector with a needle valve extending from the nozzle to form a pintle
by modifying the size and shape of the pintle what can be changed to suit different engine requirements?
spray pattern
a pintaux injector is a variation of a _______ injector
pintle
a pintaux injector has an _________ which directs fuel to the hottest part of a combustion chamber
auxiliary hole
a pintaux injector does not require starting aids true or false?
true
is the pintaux auxiliary hole self cleaning? if so how
yes , fuel is constantly sprayed through the auxiliary hole during operation to prevent carbon build up
