What is the principle of Honda CB400's variable valve?

[VonBrady]

Engine variable valve timing technology adjusts the intake (exhaust) volume, valve opening and closing time, and angle according to the engine's operating conditions to achieve the optimal air intake and improve combustion efficiency. Introduction to Variable Valve: Variable valve timing technology has almost become a standard feature in modern engines. To further tap the potential of traditional internal combustion engines, engineers have developed variable valve lift technology based on this. When these two technologies are effectively combined, they provide higher intake and exhaust efficiency for the engine under various operating conditions and speeds. This not only enhances power but also reduces fuel consumption. Principle of Valve Timing Mechanism: The valve timing mechanism of an engine is responsible for supplying the fresh air necessary for gasoline combustion in the cylinders and expelling the exhaust gases after combustion. This process can be likened to the human breathing process of inhalation and exhalation.