2009年6月21日 · There isn't a lesser grade offered than the VVT-i. This is just an oil pressure actuated cam phaser. This perticular application only controls cam angle of the intake camshaft, not lift or duration as mentioned earlier. Toyota does have the technology known as VVTL-i.

2011年7月7日 · Many speculated it might have been a differet "tune" of the 4.0 liter with single VVT-i at the time, but the consensus as I understand it was that slightly different HP & TQ rating was a result of 91 octane gas, which led to the consensus among many that obviously this engine being a higher compression engine would show benefit from using ...

2019年8月7日 · On the exhaust side, Variable Valve Timing-intelligent (VVT-i), which optimally controls the exhaust camshaft (No. 2 camshaft) to the valve timings according to driving conditions, is used." I ask - how is it controlled and activated?

2014年8月2日 · Both VTEC and VVT-i are examples of variable valve timing, they're just the different trademark names of their associated brands. Variable valve timing allows for better fuel efficiency by controlling amount of time the intake valve is open (retarded timing=less fuel used) depending on what the demand is on the throttle.

2009年10月10日 · VVT-i is sort of like the best of both cam worlds, you can have a high hp, high rpm cam and a high torque, at low rpm cam on the same camshaft. It basically is the same as Honda's VTEC. Interesting fact it was actually Ferrari who originally used variable valve technology, way back in the mid 1980's!

2013年10月22日 · If the oil filter is a traditional spin on filter mounted in front of the driver side valve cover (next to the oil fill cap), it's the original single VVT-i 4.0 V6. The dual VVT-i 4.0 V6 has uses a cartridge oil filter and it's mounted down low towards the bottom of the engine--it's not accessible from up above through the hood.

2000年11月9日 · VVT-i is used on the intake only, except in the Altezza (JDM) where it is called BEAMS Double VVT-i (BEAMS = Breakthrough Engine Advanced Management System, or something along those lines). Altezza (forum member) told me that Dual VVT-i is the same thing as VVTL-i, but I respectfully disagree.

2009年9月27日 · Dual VVT-i is more about emissions and economy than performance. The current tacoma has more torque than that FJ cruiser with premium gas specs. Besides, its the same engine with dual vvt-i, and dual vvt-i isn't anything new …

2003年1月12日 · to add to another voice to the vvt-i question.... the ecu uses many different sensors to determine how much the timing will be adjusted. oil flows into the solnoid (its not really one but anyways) and is devided to the front and back of the cam gear. i forget the specifics (i can look it up if you want) but when it puts all the oil in the front chamber it forces the cam to spin …

2000年7月28日 · As CelicaY2K said, only the Celica GT-S has a VVTL-i engine. All other Toyota engines (that have variable timing) have either VVT or VVT-i. All Lexus cars and trucks have VVT-i now. The 2ZZ-GE engine (supposedly) costs $16k US, according to the posts on newcelica.org. That's just a 1.8L 4-banger.