Apparatus and method for controlling variable valve timing in an internal combustion engine

Abstract

An apparatus for controlling variable valve timing in an internal combustion engine that varies the opening and closing of intake and exhaust valves by controlling the rotational phase of the crankshaft relative to the crankshaft of the internal combustion engine time, the apparatus includes a controller configured to determine whether the engine state enters the scavenging region in the overlapping region of the intake valve and the exhaust valve and controls the variable valve timing to The period of time elapsed after the zone, reducing the valve overlap time.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2015-0173877 filed with the Korean Intellectual Property Office on December 8, 2015, the entire contents of which are hereby incorporated by reference. technical field [0003] The present disclosure relates to an apparatus and method for controlling variable valve timing (VVT) in an internal combustion engine, and more particularly, to such a method for controlling variable valve timing (VVT) in an internal combustion engine Devices for timing: their ability to prevent catalyst damage during scavenging (scavenging) conditions, in which fresh air is delivered directly from the intake to the exhaust of the engine; and methods thereof. Background technique [0004] In recent years, internal combustion engines are equipped with a turbocharger and an intercooler in order to reduce fuel consumption and obtain a large output. In such an internal combust...

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Problems solved by technology

Therefore, the temperature of the catalyst increases so that the catalyst device 40 may be damaged

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