| 摘要 |
<p>An engine (110) is disclosed. The engine has an engine block (104) at least partially forming a combustion chamber (124), and a piston (106) located to reciprocate within the combustion chamber. The engine also has an exhaust valve (155) fluidly connected to the combustion chamber, and a filter assembly (260) fluidly connected to the exhaust valve. The engine further has a controller (310) configured to open the exhaust valve during a portion of an intake stroke of the piston and a portion of a compression stroke of the piston to reduce an amount of air available for combustion during an ensuing power stroke, wherein the exhaust valve opens after a majority of the intake stroke is complete and closes during a first half of the compression stroke.</p> |
