HONDA's

[EJ25RUN]

Forgot Toyota's variable timing.

I WIN!

VVT Implementations

* Aftermarket Modifications - Conventional hydraulic tappet can be engineered to rapidly bleed-down for variable reduction of valve opening and duration.
* Alfa Romeo Twin Spark - TS stands for "Twinspark" engine, it is equipped with Variable Valve Timing technology.
* BMW
o Valvetronic - Provides continuously variable lift for the intake valves; used in conjunction with Double VANOS.
o VANOS - Varies intake timing by rotating the camshaft in relation to the gear.
o Double VANOS - Continuously varies the timing of the intake and exhaust valves.

* Ford Variable Cam Timing - Varies valve timing by rotating the camshaft.
* DaimlerChrysler - Varies valve timing through the use of concentric camshafts developed by Mechadyne enabling dual-independent inlet/exhaust valve adjustment on the 2008 Dodge Viper.

* GM
o VVT - Varies valve timing continuously throughout the RPM range for both intake and exhaust for improved performance in both overhead valve and overhead cam engine applications.(See also Northstar System).
o DCVCP (Double Continuous Variable Cam Phasing) - Varies intake and exhaust camshaft timing continuously with hydraulic vane type phaser (see also Ecotec LE5).
o Alloytec - Continuously variable camshaft phasing for inlet cams. Continuously variable camshaft phasing for inlet cams and exhaust cams (High Output Alloytec).

* Honda
o VTEC - Varies duration, timing and lift by switching between two different sets of cam lobes.
o i-VTEC - In high-output DOHC 4 cylinder engines the i-VTEC system adds continuous intake cam phasing (timing) to traditional VTEC. In economy oriented SOHC and DOHC 4 cylinder engines the i-VTEC system increases engine efficiency by delaying the closure of the intake valves under certain conditions and by using an electronically controlled throttle valve to reduce pumping loss. In SOHC V6 engines the i-VTEC system is used to provide Variable Cylinder Management which deactivates one bank of 3 cylinders during low demand operation.
o VTEC-E - Unlike most VTEC systems VTEC-E is not a cam switching system, instead it uses the VTEC mechanism to allow for a lean intake charge to be used by closing one intake valve under certain conditions.
* Hyundai MPI CVVT - Varies power, torque, exhaust system, and engine response.
* Kawasaki - Varies position of cam by changing oil pressure thereby advancing and retarding the valve timing, 2008 Concours 14.
* Lexus VVT-iE - Continuously varies the intake camshaft timing using an electric actuator.
* Mazda S-VT - Varies timing by rotating the camshaft.
* Mitsubishi MIVEC - Varies valve timing, duration and lift by switching between two different sets of cam lobes. The 4B1 engine series uses a different variant of MIVEC which varies timing (phase) of both intake and exhaust camshafts continuously.
* Nissan
o N-VCT - Varies the rotation of the cam(s) only, does not alter lift or duration of the valves.
o VVL - Varies timing, duration, and lift of the intake and exhaust valves by using two different sets of cam lobes.
o CVTC introduced with the HR15DE, HR16DE, MR18DE and MR20DE new engines in September 2004 on the Nissan Tiida and North American version named Nissan Versa (in 2007); and finally the Nissan Sentra (in 2007).
o VVEL introduced with the VQ37VHR Nissan VQ engine engine in 2007 on the Infiniti G37.
* Porsche
o VarioCam - Varies intake timing by adjusting tension of a cam chain.
o VarioCam Plus - Varies intake valve timing by rotating the cam in relation to the cam sprocket as well as duration, timing and lift of the intake and exhaust valves by switching between two different sets of cam lobes.
* Proton Campro CPS - Varies intake valve timing and lift by switching between 2 sets of cam lobes without using rocker arms as in most variable valve timing systems. Debuted in the 2008 Proton Gen-2 CPS[2][3] and the 2008 Proton Waja CPS.
* PSA Peugeot Citroën CVVT - Continuous variable valve timing.
* Renault Clio 182, Clio Cup and Clio V6 Mk2 VVT - variable valve timing.
* Rover VVC - Varies timing with an eccentric disc.
* Suzuki - VVT - Suzuki M engine
* Subaru
o AVCS - Varies timing (phase) with hydraulic pressure, used on turbocharged and six-cylinder Subaru engines.
o AVLS - Varies duration, timing and lift by switching between two different sets of cam lobes (similar to Honda VTEC). Used by non-turbocharged Subaru engines.
* Toyota
o VVT - Toyota 4A-GE 20-Valve engine introduced VVT in the 1992 Corolla GT-versions.
o VVT-i - Continuously varies the timing of the intake camshaft, or both the intake and exhaust camshafts (depending on application).
o VVTL-i - Continuously varies the timing of the intake valves. Varies duration, timing and lift of the intake and exhaust valves by switching between two different sets of cam lobes.
* Volkswagen & Audi - VVT introduced with later revisions of the 1.8t engine. Similar to VarioCam, the intake timing intentionally runs advanced and a retard point is calculated by the ECU. A hydraulic tensioner retards the intake timing.
* Volvo - CVVT
* Yamaha - VCT (Variable Cam Timing) Varies position of cam thereby advancing and retarding the valve timing.

Proton - VVT introduced in the Waja 1.8's F4P renault engine (toyota supplies the VVT to renault)