What is VVT-iw Technology?
2 Answers
VVT-iw stands for Intelligent Wide-Variable Valve Timing intake system. Here are the details about VVT-iw technology: With VVT-iw technology, the opening/closing timing and angle of both intake and exhaust valves can be adjusted to optimize air intake and improve fuel combustion efficiency. During high-power output, the intake valve can open 50° to 30° before top dead center and remain open until 30° to 110° after bottom dead center, with an increased adjustable range on the delay side. This extends the intake duration by 30° compared to previous systems. As a result, it significantly increases engine air intake, greatly enhances engine speed response, provides a wider high-torque output range, and offers substantial benefits for improving engine power and torque.
VVT-iW is Toyota's intelligent wide-angle variable valve timing technology, which allows the engine to adjust valve opening and closing times over a broader range, making it more flexible than standard VVT-i. At low speeds, it can close some valves to simulate the Atkinson cycle, significantly saving fuel; at high speeds, it fully opens the valves to deliver strong power. This is controlled by an electronic hydraulic system, offering fast response and adaptability to various driving conditions. I've repaired many Toyota vehicles, and owners report an average fuel consumption reduction of 10% with smoother driving. Although the system is a bit complex, Toyota's design is durable—as long as regular maintenance and oil changes are performed, issues are rare. In daily use, it reduces emissions and is environmentally friendly, particularly showing more pronounced effects in hybrid models.
