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Thread: : What is involved in making a selectablecylinder combustion engine ?
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face BY : Carl Denk email (remove spam text)



There are at least 6 variations of fuel injection for gasoline engines
out there.
1: One injector at the throttle body ( where the throttle butterfly is
located) Early Ford Escorts (1981 >>)had this. The Injector sprays
continually at varying rates.
2: Mechanical fuel injection, I don't know about this, but  I think they
have a mechanical injection pump, like some (many newer are electronic
injected) diesels with a nozzle before each intake valve. Don't know
whether these sprayed continuously. Not really sure about -Early after
market (Hilborn), Mercedes (300SL), Corvettes?? Had this. In the mid
1950's the electronis as we know them today were non existent. :)
3: EFI (Electronic fuel injection) - Each injector was located before an
intake valve, sprayed continuously at varying rates. Became common in
1980's. My 1989 Ford Bronco with 5.8L Windsor (Ontario, Canada) engine
had this.
4: SEFI (Sequential Electronic fuel injection) - Each injector located
before an intake valve,  Sprayed intermittently, timed to spray only
when intake valve open at varying rates. Became common in early mid
1990's. My 1996 Ford Bronco with 5.8L Windsor (Ontario, Canada) engine
has this.
5: I have seen recently some manufacturers (BMW, Mercedes ??)
advertising direct fuel injection. I am assuming this is like  a diesel
engine where the injector sprays directly into the combustion chamber.
If that is the case, possibly spark plugs are not required.
6: A constant pressure pump with a throttle body that regulates fuel
pressure (flow) with throttle opening and vacuum. Fuel is distributed to
all nozzles located before each intake valve. Fuel flows to all nozzles
all the time. Most injected aircraft engines use this method. The move
to more efficient injection method has been very slow due to reliability
(an engine failure is not pleasant) and certification issues.

Sean Breheny wrote:
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<495F981D.4000907@alltel.net> 7bit

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Subject (change) : What is involved in making a selectablecylinder combustion engine ?

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