Piston IC engine with exhaust cleaner - has exhaust pipe stop valve opening and shutting after exhaust valve

摘要

The IC engine has a valve controlled exhaust passage (8), to which a catalytic cleaning unit (12), soot filter etc. is connected, with the exhaust pipe (17) in turn connected to the catalytic cleaner. In the exhaust pipe is a stop valve (18), opening and shutting after the exhaust valve (10). It is pref. held open until shortly before or after the exhaust valve reopening. ADVANTAGE - Increased drilling time by gases in cleaner, without excessive back-pressure.