Working principle of Haima 2005 variable inertia throttle solenoid valve

In 2005, the working principle of zm variable inertia throttle solenoid valve in Haima was to control the intake length by rotating the diverter valve, use a longer intake at low speed, increase the intake volume by using intake inertia, open the diverter valve at high speed, and use a shorter intake to reduce the intake time lag and enhance the ventilation efficiency of the engine!