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AssigneeTula Technology, Inc.
InventorsJohn W. Parsels, Matthew A. Younkins, Shikui Kevin Chen
Estimating the term…
A variety of methods and devices for controlling the operation of the intake and exhaust valves in an internal combustion engine during skip fire operation are described. In various embodiments, an exhaust valve monitor or other suitable mechanism is used to detect exhaust valve actuation faults. When an exhaust valve actuation fault is detected for a particular cylinder, the corresponding intake valve is deactivated (or not activated) in circumstances when it would otherwise be activated in order to prevent the intake valve from opening into a cylinder that contains high pressure combustion gases. The described approach is particularly beneficial when skip fire operation is combined with cylinder deactivation so that air is not pumped through the cylinders during the skipped working cycles.
A method of controlling the operation of an internal combustion engine having at least one cylinder, each cylinder having an associated intake valve and an associated exhaust valve, the method comprising:
A method of controlling the intake valve of an internal combustion engine operating in skip fire mode having at least one cylinder, each cylinder having at least one intake valve and one exhaust valve, the method comprising:
A valve control system for use in an internal combustion engine operating in skip fire mode, the engine including a plurality of deactivatable cylinders and a camshaft, each cylinder having an associated intake valve and an associated exhaust valve, the camshaft being arranged to actuate the intake and exhaust valves, wherein for each deactivatable cylinder, the valve control system includes:
Dependencies are inferred from the claim text.