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

Claim 7:
8. A method, comprising:
operating an engine, the engine comprising:
multiple cylinders, the multiple cylinders comprising multiple pistons, wherein each of the multiple pistons is slidably positioned within each of the multiple cylinders;
multiple intake valves, wherein each of the multiple intake valves is positioned in an intake port of each of the multiple cylinders;
multiple exhaust valves, wherein each of the multiple exhaust valves is positioned in an exhaust port of each of the multiple cylinders;
a crankshaft is connected to each of the multiple pistons; and
an exhaust pulse valve positioned along an exhaust main passage fluidly connected between the multiple exhaust valves and a turbine inlet of a turbocharger;

rotating the crankshaft in the engine;
while the crankshaft is rotating during a first portion of an engine cycle, keeping the exhaust pulse valve in a fully open position to allow exhaust flow from the multiple cylinders to the turbocharger; and
while the crankshaft is rotating during a remaining portion of the engine cycle, keeping the exhaust pulse valve in a fully closed position to block the exhaust flow from the multiple cylinders.