1.VVT-iW technical principles
Toyota VVT-i in the conventional technology, based on the camshaft by adjusting means to achieve ultra-wide angle VVT-iW variable valve timing system.
“VVT-iW” is in the original “VVT-i” variable valve technology, based on the development of an updated technology, which stands for “intelligent wide-angle variable valve timing Intake System . ” The “Camry” 6AR-FSE 2.0-liter engine, Highlander 8AR-FTS car engine or the like, equipped with this device.
The VVT-iW technology, into the opening and closing time of exhaust valves and the size of the angle can be adjusted, the intake air amount optimized to improve fuel combustion efficiency. “Camry” when the power output of the engine, the intake valve before TDC 50 ° to 30 ° can be opened up to 30 ° to 110 ° after bottom dead center off delay, the delay-side adjustable range is increased, intake time than the original large extended 30 °. This increases the intake air amount of the engine, the engine speed greatly improve the response speed, and can obtain a wider range of the high output torque, there is great benefit to the increased engine power and torque.
