An engine control system includes an engine, an intake valve, an ignition plug mounted in a combustion chamber, an exhaust valve; a dual continuously variable valve duration device configured to adjust an intake duration of the intake valve and an exhaust duration of the exhaust valve; a turbine mounted downstream of the engine; a warm-up catalyst (WCC) mounted downstream of the turbine; a gasoline particulate filter (GPF) mounted downstream of the warm-up catalyst; and a controller operably connected to the ignition plug and the dual continuously variable valve duration device and configured to adjust an ignition timing of the ignition plug, the intake duration, and the exhaust duration based on a driving condition of a vehicle, wherein under a condition that lambda () is 1, the controller is configured to adjust the exhaust duration so that an exhaust valve open timing is retarded, and an intake valve close (IVC) timing is maintained to maintain a valve overlap period.

An embodiment of an exhaust handling system for a marine vessel includes a cap connected to a top end portion of an exhaust stack of the marine vessel to form an enclosure at least partially surrounding an outlet of an exhaust pipe extending through the exhaust stack. In addition, the exhaust handling system includes a collection pipe in fluid communication with the cap such that the collection pipe is to receive exhaust from the enclosure, and a coupling connected to the collection pipe that is to connect to an exhaust cleaning assembly. The exhaust cleaning system includes a tank to receive the exhaust. The cap at least partially defines a first flow path for the exhaust that extends from the enclosure to the atmosphere. The collection pipe at least partially defines a second flow path for the exhaust that extends from the enclosure to the coupling via the collection pipe.

An embodiment of an exhaust handling system for a marine vessel includes a cap connected to a top end portion of an exhaust stack of the marine vessel to form an enclosure at least partially surrounding an outlet of an exhaust pipe extending through the exhaust stack. In addition, the exhaust handling system includes a collection pipe in fluid communication with the cap such that the collection pipe is to receive exhaust from the enclosure, and a coupling connected to the collection pipe that is to connect to an exhaust cleaning assembly. The exhaust cleaning system includes a tank to receive the exhaust. The cap at least partially defines a first flow path for the exhaust that extends from the enclosure to the atmosphere. The collection pipe at least partially defines a second flow path for the exhaust that extends from the enclosure to the coupling via the collection pipe.

An engine control system includes an engine, an intake valve, an ignition plug mounted in a combustion chamber, an exhaust valve; a dual continuously variable valve duration device configured to adjust an intake duration of the intake valve and an exhaust duration of the exhaust valve; a turbine mounted downstream of the engine; a warm-up catalyst (WCC) mounted downstream of the turbine; a gasoline particulate filter (GPF) mounted downstream of the warm-up catalyst; and a controller operably connected to the ignition plug and the dual continuously variable valve duration device and configured to adjust an ignition timing of the ignition plug, the intake duration, and the exhaust duration based on a driving condition of a vehicle, wherein under a condition that lambda () is 1, the controller is configured to adjust the exhaust duration so that an exhaust valve open timing is retarded, and an intake valve close (IVC) timing is maintained to maintain a valve overlap period.