@gr0ver135 Moving parts in side of a two stroke engine are piston and a crankshaft, same as in x-torq engine which is also two stroke engine. This is not pure design, this is fancy name for a pointless design. Husqvarna has concurrence Stihl and Dolmar. Professional products from Dolmar or from Stihl use only regular two stroke engine. Why? Because there are chainsaws from them that have 40 years and still working.
@Zuconja Not true. You forgot rod, pin, bearings, clutch, oiler.
The design is definitely NOT pointless. It evolved from work at Redmax on stratified scavenging, with the purpose of maintaining specific power output of 2-stroke and meeting emissions limits.
Read up on 2-stroke "short-circuiting" wherein air/fuel/oil from transfers partly escapes through still-open exhaust port. This design exists to counter that, and avoid waste of ~30% of fuel.
The simple it is, the better. This is not simple.
Zuconja 7 months ago
@Zuconja it's way simple: no extra moving parts, pure design.
gr0ver135 6 months ago
@gr0ver135 Moving parts in side of a two stroke engine are piston and a crankshaft, same as in x-torq engine which is also two stroke engine. This is not pure design, this is fancy name for a pointless design. Husqvarna has concurrence Stihl and Dolmar. Professional products from Dolmar or from Stihl use only regular two stroke engine. Why? Because there are chainsaws from them that have 40 years and still working.
Zuconja 6 months ago
@Zuconja Not true. You forgot rod, pin, bearings, clutch, oiler.
The design is definitely NOT pointless. It evolved from work at Redmax on stratified scavenging, with the purpose of maintaining specific power output of 2-stroke and meeting emissions limits.
Read up on 2-stroke "short-circuiting" wherein air/fuel/oil from transfers partly escapes through still-open exhaust port. This design exists to counter that, and avoid waste of ~30% of fuel.
Stihl does it too; alternative is catalyst.
woodscritter 5 months ago
two fast for laic
nihilnisi 1 year ago