Patent ID: 11933233
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A method, comprising:
operating an engine, comprising:
multiple cylinders comprising at least one deactivated cylinder and at least one activated cylinder;
multiple intake valves, wherein each intake valve is positioned in an intake port of each of the multiple cylinders; and
multiple exhaust valves, wherein each exhaust valve is positioned in an exhaust port of each of the multiple cylinders;

deactivating the at least one deactivated cylinder, comprising:
deactivating each of the multiple intake valves and each of the multiple exhaust valves to each of the at least one deactivated cylinder;

operating the at least one activated cylinder, comprising:
operating each of the multiple intake valves and each of the multiple exhaust valves to each of the at least one activated cylinder according to a valve timing schedule;

actuating an exhaust pulse valve positioned along an exhaust main passage fluidly connected between a turbine inlet to a turbocharger and the multiple exhaust valves, the actuating comprising:
fully opening the exhaust pulse valve when at least one of the multiple exhaust valves to the at least one activated cylinder is open; and
fully closing the exhaust pulse valve when each of the multiple exhaust valves to the at least one activated cylinder is closed.