View source for N-VCT

{{Short description|Automobile variable valve timing technology}}
{{More citations needed|date=June 2007}}
'''Nissan Variable Timing control<ref>{{cite book|title=S14 nissan workshop manual|pages=EM9, EC17|url=http://www.240edge.com/manuals/s14_sr20det.pdf|archive-url=https://web.archive.org/web/20081120034058/http://www.240edge.com/manuals/s14_sr20det.pdf|url-status=dead|archive-date=November 20, 2008}}</ref>''' or '''Nissan Valve Timing Control System''' (commonly known as '''N-VTC''', '''VTC''', '''NVCS''' or '''NVTCS''') is an [[Car|automobile]] [[variable valve timing]] technology developed by [[Nissan]]. N-VCT was first introduced in 1987 on the [[Nissan VG engine#VG30DE|VG30DE]] and [[Nissan VG engine#VG20DET|VG20DET]] engine.

N-VCT varies valve timing by rotating the affected camshaft relative to the sprocket; valve lift and duration are not altered. This rotation is achieved when an electric solenoid, controlled by the car's ECU, allows pressurized engine oil to flow into and through the cam and into a slave mechanism, axially advancing camshaft timing relative to the sprocket. Valve to crank angle timing varies depending on whether engine speed is high or low and changes at fixed intervals. NVTCS is hydraulically actuated similar to Honda's [[VTEC]] system, but adjusts a different aspect of the valve train, so it is more like the I part of I-VTEC.<ref>{{cite web |url=http://www.hitachi-automotive.co.jp/products/ems/02.html |title=可変動弁システム：日立オートモティブシステムズ株式会社 |publisher=日立オートモティブシステムズ製品紹介 |archive-url=https://web.archive.org/web/20111222081634/http://www.hitachi-automotive.co.jp/products/ems/02.html |archive-date=2011-12-22 |language=ja |url-status=dead}}</ref><ref>{{Cite web |url=http://www.schaeffler.jp/content.schaeffler.jp/ja/press/press-releases/press-details.jsp?id=74314561 |title=可変バルブタイミング機構の電動化により環境性能を向上 |publisher=Schaeffler Japan |access-date=2021-01-10 |archive-date=2016-08-03 |archive-url=https://web.archive.org/web/20160803045003/http://www.schaeffler.jp/content.schaeffler.jp/ja/press/press-releases/press-details.jsp?id=74314561 |language=ja |url-status=dead}}</ref> NVTCS equipped Nissan engines do not have as high of engine speeds as VTEC equipped engines so NVTCS is simpler, quieter, and requires no special maintenance.{{fact|date=November 2014}} Some Nissan engines only have N-VTC on the intake cam such as the GA16DE, QG16/18, SR20DE/DET (S14-15) or RB25DE/DET (R33-R34 GTS/GTS-T, GT/GTT) while others have it on both the intake and exhaust cams. NVTCS was eventually phased out and replaced by a continuously variable system called [[CVTCS]] on newer engines such as the [[Nissan VQ engine|VQ]] and [[Nissan VK engine|VK]] series.<ref>{{Interlanguage link|日産・フェアレディZ Z33|ja|lt=Z33の}}「35th Anniversary」モデル、およびマイナーチェンジ以降のモデル{{incomplete citation|date=October 2024}}</ref>

== List of engines ==
* [[Nissan GA engine|GA16DE]]
* [[Nissan QG engine|QG16DE]]
* [[Nissan QG engine|QG18DE]]
* [[Nissan RB engine#RB25|RB25DET]] (1993+) (intake only)
* [[Nissan SR engine|SR20DE]]
* [[Nissan SR engine|SR20DET]]
* [[Nissan TB engine|TB48DE]]
* [[Nissan VE engine|VE30DE]]
* [[Nissan VG engine|VG20DET]]
* [[Nissan VG engine#VG30DE|VG30DE]]
* [[Nissan VG engine#VG30DET|VG30DET]]
* [[Nissan VG engine#VG30DETT|VG30DETT]]
* [[Nissan VH engine|VH45DE]]

== See also ==
* [[CVTCS|Nissan Continuous Variable Valve Timing Control]]
* [[Variable Valve Event and Lift|Nissan Variable Valve Event and Lift]]
* [[Nissan VVL engine|Nissan Variable Valve Lift and Timing]]

==References==
{{reflist}}

[[Category:Variable valve timing]]
[[Category:Nissan]]


{{automotive-tech-stub}}