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

發帖原因：車壇網友--1234567-友情提示這個部件，於是去查了查，再接著就有了這個帖子！


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

適用車型：好多好多，各個車係這個部件的稱謂略有不同，有的這個電磁閥和濾網合二為一，具體細節請自查！

寶馬車係這個部件叫：Vanos  

這有個鏈接可參考 2008 BMW 750Li E66 Vanos solenoid 清洗作業

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前後Bank的VVT電磁閥，和這個電磁閥垂直交叉的底部就是這個電磁閥的過濾網(Strainer)


上麵的是後BANK的電磁閥，下麵的是前BANK的電磁閥


略去N多拆卸部件，主要是空濾盒子和若幹橡膠軟管，切記連接配對不要搞錯！

紅色箭頭為前BANK VVT電磁閥  緊固螺栓10mm
黃色箭頭為前BANK VVT電磁閥的Strainer  緊固螺栓14mm


抵近拍照，紅色為電磁閥及緊固螺栓，黃色為過濾網螺栓，附近螺栓一堆，可要先搞清楚哪個是那個！



在這個位置用絲錐輕輕地撬一下就下來了


看著還不錯，沒啥固態雜質



沒有淺的14mm socket,隻能找到這個比較深的impact socket，所以多卸了些部件及管件！


在拔電磁閥的之前就要墊塊破布啥的接著機油，這兩個東西卸下都會有少許機油溢出




也還不錯哦！沒有固狀沉澱雜質


後麵就是用汽油給他們都泡個澡，清洗幹淨吹幹，其實也不髒！安裝注意Strainer是有安裝方向的，小頭在外。每次隻清洗一個，前後電磁閥不要混用！！！


後麵3個缸的電磁閥（紅色箭頭）及過濾網（黃色箭頭）


這些是網上搜來的，看看啥叫那個髒！




結論：正確使用標稱機油及按時按裏程定期更換機油是保障機油係統內部清潔的關鍵！

所有跟帖： 

• 老兄真快，未雨綢繆，先清洗上了：））。不過還是那句話，如果控油閥發生問題 ---1234567-- ♂ (117 bytes) () 06/02/2015 postreply 21:58:50

• :-))) 說的是，如果是閥體故障多半會有故障碼， 特別是使用它自家的GTS -5W40- ♂ (316 bytes) () 06/02/2015 postreply 22:10:40

• 老兄謙虛，動手能力也強，讚！ ---1234567-- ♂ (0 bytes) () 06/03/2015 postreply 06:50:50

• 頂！你這一拆，看來我的不用動了！過了三萬六千英裏就開始用合成油 -than- ♂ (43 bytes) () 06/03/2015 postreply 03:56:05

• :-))) 我也感覺隻要按期換機油基本問題不大，高大上的合成油當然更好！ -5W40- ♂ (61 bytes) () 06/03/2015 postreply 08:43:27

• 可惜沒注意到這個東西 上次才把valve cover卸下來 應該可以直接就看到了吧 -violinpiano- ♂ (0 bytes) () 06/03/2015 postreply 10:49:06

• 好消息是直接可看到 :-))) -5W40- ♂ (0 bytes) () 06/03/2015 postreply 10:59:33

• 重點跟一句 -biglow- ♂ (93 bytes) () 06/03/2015 postreply 11:25:59

• 聽老大滴，機油一定要定期定邁數換，標號也要按原廠的要求辦！ :-))) -5W40- ♂ (0 bytes) () 06/03/2015 postreply 11:35:06

• 按3000邁，5000邁，還是一萬邁換？ -燕京十景- ♀ (0 bytes) () 06/04/2015 postreply 11:31:50