2006 LEXUS RX330 OCV(VVT) Solenoid and Strainer preventive maint

5W40 2015-06-02 20:32:23 ( reads)

发帖原因：车坛网友--1234567-友情提示这个部件，于是去查了查，再接着就有了这个帖子！

What does a VCT or VVT Solenoid Do?

VCT or Variable Cam Timing solenoid is a device used in modern engines to change camshaft position timing in relevance to engine speed and engine timing allowing the engine to produce more horsepower without adding excessive overlap to the camshaft design.

The way the VCT Solenoid works is as follows:

The VCT solenoid works with oil pressure, it receives a signal from the ECM when the camshaft needs to be rotated either in the advanced mode or retarded mode depending on engine load and speed. The VCT solenoid is able to accomplish that by altering the oil flow in the passages that lead to the cam phase(s), there are passages to advance the valve timing (open the valves earlier), and passages that direct the oil to retard the valve timing (open them later)

What is the Purpose of the VVT System?

The purpose of the VCT or Variable Cam Timing system is to allow the engine to move larger volumes of air in and out of the cylinders to generate maximum horsepower.

Vehicles with DOHC (Dual Overhead Cam) engines usually have two VCT solenoids mounted in each cylinder head, one for each camshaft, allowing the Engine Control Computer to activate each VCT timing mechanism in each Camshaft separately.

NOTE: The Cam phase is mounted on the front of the camshaft(s) it is driven by the engine’s timing chain or timing belt depending on the engine’s design.

How Variable Valve Timing Works

Oil Control Valve=OCV

适用车型：好多好多，各个车系这个部件的称谓略有不同，有的这个电磁阀和滤网合二为一，具体细节请自查！

宝马车系这个部件叫：Vanos

这有个链接可参考 2008 BMW 750Li E66 Vanos solenoid 清洗作业

**************************************************************************************************************
**************************************************************************************************************

前后Bank的VVT电磁阀，和这个电磁阀垂直交叉的底部就是这个电磁阀的过滤网(Strainer)