Cvvt system

Abstract

The present disclosure provides a CVVT system including: an OCV supplying oil received from a cylinder block into a CVVT; an oil supply unit supplying oil from the OCV to a lock pin; and an actuator selectively opening or closing the oil supply unit such that oil is supplied to the lock pin and the lock pin is separated from a lock pin hole when the oil supply unit is opened.

Description

technical field [0001] The present invention relates to a continuously variable valve timing (CVVT) system. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Generally, the CVVT system continuously changes opening / closing timing by changing the phase of the camshaft according to the revolutions per minute (RPM) of the engine and the load of the vehicle. In general, a CVVT system mainly includes: a crank angle sensor that senses the rotation angle of the crankshaft, a cam angle sensor that senses the rotation angle of the camshaft, a variable speed sensor that is connected to the side of the camshaft through a timing belt and advances or retards the camshaft. A valve timing unit, and an ECU (Electronic Control Unit) that controls an oil control valve (OCV) so that oil is supplied to the advance chamber of the variable valve timing unit or Hysteresis ...

AI Technical Summary

Problems solved by technology

[0012] That is, the intermediate phase CVVT system has an initial position at the intermediate position and retards the intake valve timing when the vehicle is running, so the intermediate phase CVVT of the related art in a manner of controlling the intermediate phase using the cam torque can only be applied to V-type 6-cylinder engine or horizontal engine

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