Valve opening arrangement and method

摘要

An engine with a valve opening arrangement includes an engine including at least one cylinder and at least one valve for opening and closing an opening in the cylinder. The valve is spring loaded to a closed position. The engine also includes a movable contact surface for urging the valve to an open position, and a control arrangement at least partially connected to the contact surface and operable in a modified mode to at least one of advance opening and delay closing of the valve relative to opening and closing in a normal mode.