What does a VVT engine mean?
2 Answers
VVT engine refers to the VVT (Variable Valve Timing) system, which adjusts the phase of the engine camshaft through its control and execution system, allowing the timing of valve opening and closing to vary with engine speed to improve air intake efficiency. The working principle of a VVT engine is: when the engine shifts from low speed to high speed, the electronic computer automatically directs oil pressure to a small turbine inside the intake camshaft drive gear. Under this pressure, the small turbine rotates a certain angle relative to the gear housing, causing the camshaft to rotate forward or backward within a 60-degree range, thereby changing the timing of the intake valve opening to achieve continuous adjustment of valve timing.
I have a habit of repairing cars, and I'm particularly familiar with VVT engines. VVT stands for Variable Valve Timing system, simply put, it means the engine can adjust the timing of valve opening and closing according to changes in speed. For example, opening the valve later at low speeds saves fuel, while opening it earlier at high speeds increases power. This technology is commonly seen in Toyota's VVT-i or Honda's i-VTEC, controlled by hydraulic or solenoid valves. In practical use, you can feel the difference, such as faster acceleration and lower fuel consumption. For maintenance, it's important to regularly change the oil and clean carbon deposits, otherwise, clogged oil passages can affect VVT response. Overall, it's more complex than traditional engines but more efficient and durable. I've noticed many modern cars come with it as standard, which is quite reassuring.
