What is variable timing valve train?
In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions.
What are the benefits of variable valve train technology?
Variable Valve Timing (VVT) Engine Advantages
- #1 – High RPM Power.
- #2 – Low RPM Efficiency.
- #3 – Electric Monitoring.
- #4 – Lower Emissions.
How does variable valve timing system work?
A simple valve and engine cross-section. Variable valve timing enables these different behaviours by changing how the intake and exhaust valves work at different engine speeds. Thus, it helps optimise the engine’s performance, whilst also improving fuel economy and emissions.
Who invented VVT?
Corliss Orville BurandtVariable valve timing / InventorCorliss Orville Burandt is an American engineer who invented a system of variable valve timing in automobile engines. Working through a 1965 Chevrolet Corvair, he designed a system of putting a sensor into the cylinder to optimize the fuel-air mixture during combustion. Wikipedia
What companies have variable valve timing?
Proprietary Terms for VVT
- Alfa Romeo – Twinspark technology.
- Audi – VVT.
- BMW – Valvetronic, VANOS and Double VANOS.
- Ford – Variable Cam Timing.
- GM – Double Continuous Variable Cam Phasing (DCVCP), Alloytec and Variable Valve Timing (VVT)
- Honda – VTEC, iVTEC and VTEC-E.
- Hyundai – MPI CVVT.
- Lexus – VVT-iE.
Who invented Variable Valve Timing?
What cars have VVT-i engines?
All current Toyota models in the U.S. use VVT-i engines except the Mirai fuel-cell vehicle, the 86 coupe and Supra sports car. The 86 uses a Subaru engine and the Supra a BMW engine, and both have variable valve timing.
Who invented variable valve timing?