2014年12月14日 · A cam phaser (called AVCS for Subaru, but the technology can be also be called MIVEC, VANOS, VVT, VTC, VCT, i-VTEC, all sorts of sometimes confusing names) moves the centerline of a camshaft in order to change the valve events. More information on cam centerlines is available in the Appendix.

2021年9月28日 · Taking a look inside the VVT system on an FA20 Toyota 86 How does VVT (Variable valve timing control) work?...more. (1) A rotor-based design with high efficiency and low friction while...

2015年9月29日 · The FA20 allows for large changes in cam timing via Variable Valve Timing (VVT) adjustments. Unlike many other VVT cam gears that lock at the max- retard position, the FA20 locks closer to a middle position (30 degrees retard and 40 degrees advance from the crank angle) when the engine is turned off.

2020年11月2日 · 【解決手段】エンジンの要求負荷に応じて開弁オーバラップ量を増加させるターボ過給機付きエンジンにおいて、エンジンの低負荷領域では、吸気弁開時期の進角量を、排気弁閉時期の遅角量よりも多くして、開弁オーバラップ量を増加させ、エンジンの高負荷領域では、排気弁閉時期の遅角量を、吸気弁開時期の進角量よりも多くして、開弁オーバラップ量を増加 …

An in-depth tutorial on rebuilding the Variable Valve Timing (VVT) system in your Subaru FA20 engine, found in the Toyota 86, Subaru BRZ, and Scion FR-S. Den...

2012年6月4日 · In the VVT (Variable Valve Timing) system, the appropriate intake and exhaust valve open and close timing is controlled by the ECM. The ECM performs intake and exhaust valve control by performing the

2013年9月23日 · Quick tutorial on how to remap Variable Valve Timing to minimize the torque dip in the stock FA20 power curve. Below is a dyno graph of a fully modded FRS comparing stock VVT mapping our revised VVT mapping.

A direct injection-only turbo variant of the FA20, the FA20F, was introduced in late 2012 with the 2012 Legacy GT (for the Japanese market) and in the United States, the 2014 model year Subaru Forester. Compression ratio for the turbo engine falls to 10.6:1 from 12.5:1 for the FA20D.

Replacement VVT / valve oil control solenoid for the FA20 engine for Toyota 86 / Subaru BRZ (FA20) A faulty VVT (variable valve timing) control solenoid, or spool valve, can result in a check engine light accompanied by engine hesitation and pinging under acceleration.

FA20 Timing Chain INSTALLATION: Timing Chain installation is essentially the reverse order of removal. However there are some tips to ease installation: VVT Controller Timing Marks: On the side of the controllers are grooves that the pink links on the Timing Chain will align with.