18 February 2010, 23:28
Alle motoren kunnen backfires maken, vooral op LPG (altijd gasvormig mengsel i.t.t. benzine wat eigenlijke kleine druppeltjes zijn).
Bij de E (mechanische injectie, K-jet) motoren is de knal groter vanwege het grote inlaatspruitstuk. LPG is wat zwaarder dan lucht en hoopt zich vrij gemakkelijk op onderin de inlaatslangen, extra knalmateriaal dus. Er gaat ook vaak meer stuk bij backfires in mechanische injectie motoren, de klap is wat meer memorabel.
Wiki citaat: When starting an engine, timing that is too advanced will fire the spark plug before the intake valve is closed. The flame front will travel back in to the intake manifold, igniting all of that air and fuel as well. The resulting explosion then travels out of the carburetor and air cleaner. A common air filter will allow the gases to escape, but will block the flame front. On many small marine engines, no air filter is used, but a screen is placed over the intake of the carburetor as a flame arrestor to prevent these flames from escaping the intake, and potentially igniting fuel, or fuel vapors in the enclosed sump or bilge of the boat and causing a fire or explosion. Improperly adjusted carburetors that create a lean condition during acceleration can cause the air fuel mixture to burn so slowly, that combustion is still taking place during the exhaust stroke, and even when the intake valve opens. The flame front can then travel up the intake and cause a backfire. In this situation it is conceivable that there is a backfire occurring in the intake manifold and exhaust manifold simultaneously.
Bij de E (mechanische injectie, K-jet) motoren is de knal groter vanwege het grote inlaatspruitstuk. LPG is wat zwaarder dan lucht en hoopt zich vrij gemakkelijk op onderin de inlaatslangen, extra knalmateriaal dus. Er gaat ook vaak meer stuk bij backfires in mechanische injectie motoren, de klap is wat meer memorabel.
Wiki citaat: When starting an engine, timing that is too advanced will fire the spark plug before the intake valve is closed. The flame front will travel back in to the intake manifold, igniting all of that air and fuel as well. The resulting explosion then travels out of the carburetor and air cleaner. A common air filter will allow the gases to escape, but will block the flame front. On many small marine engines, no air filter is used, but a screen is placed over the intake of the carburetor as a flame arrestor to prevent these flames from escaping the intake, and potentially igniting fuel, or fuel vapors in the enclosed sump or bilge of the boat and causing a fire or explosion. Improperly adjusted carburetors that create a lean condition during acceleration can cause the air fuel mixture to burn so slowly, that combustion is still taking place during the exhaust stroke, and even when the intake valve opens. The flame front can then travel up the intake and cause a backfire. In this situation it is conceivable that there is a backfire occurring in the intake manifold and exhaust manifold simultaneously.
Volvo 940 1997 Volvo 144 1969