well because they have a very well stabilized combustion cycle where all the air fuel mixture are completely combusted,
as for a 2stroke they are rather unstable during low rpms.. factors includes reflection of soundwaves at each stroke, since a two stroke depends on its exhaust chamber to reflect soundwaves for its next power stroke, its never the same for each soundwave produced during low rpms =)
in order to increase pressure build up in the cylinder and not wasting power, exhaust chambers are used, the cone shaped design helps reflect negative sound waves back to the cylinder helping it to supercharge for the next power stroke... improving exhaust flow and better combustion giving the 2stroke a great amount of power boost..
this is why most 2stroke engines gain a significant amount of HP when having a well designed cone chamber fitted on =)
soundwaves are produced when the stroke of the piston uncovers the exhaust port for the gases to be released, when it does, a new set of fresh gas mixture is then sucked into the combustion cylinder for its another power stroke cycle..
Because the fuel intake opening and the exhaust outlet are 'exposed' by the piston at the same time, the fuel/air would mixture blow straight through without the expansion chamber resulting in a mega loss of power.
well because they have a very well stabilized combustion cycle where all the air fuel mixture are completely combusted,
as for a 2stroke they are rather unstable during low rpms.. factors includes reflection of soundwaves at each stroke, since a two stroke depends on its exhaust chamber to reflect soundwaves for its next power stroke, its never the same for each soundwave produced during low rpms =)
ZeroKenshin 2 years ago
hope i explained it comprehensively =)
ZeroKenshin 2 years ago
in order to increase pressure build up in the cylinder and not wasting power, exhaust chambers are used, the cone shaped design helps reflect negative sound waves back to the cylinder helping it to supercharge for the next power stroke... improving exhaust flow and better combustion giving the 2stroke a great amount of power boost..
this is why most 2stroke engines gain a significant amount of HP when having a well designed cone chamber fitted on =)
ZeroKenshin 2 years ago
soundwaves are produced when the stroke of the piston uncovers the exhaust port for the gases to be released, when it does, a new set of fresh gas mixture is then sucked into the combustion cylinder for its another power stroke cycle..
ZeroKenshin 2 years ago
what is back presure?
ycorat06 2 years ago
what is back presure?
ycorat06 2 years ago
4 strokes idle smoother
triggerdance 2 years ago
Pushes the fuel/air mixture back into the engine.
Because the fuel intake opening and the exhaust outlet are 'exposed' by the piston at the same time, the fuel/air would mixture blow straight through without the expansion chamber resulting in a mega loss of power.
OmNomNomFap 3 years ago
If this requires an explanation then your compitency level is to low to watch it.
ihdieselman 3 years ago
I never figured out what the expansion chamber if for...
grahamid403 3 years ago