What is the throttle oil of Wuling Glory Cam?

It is normal for the throttle to have oil, which comes from the snorkel of the crankcase ventilation system. What is the crankcase ventilation system? The piston and cylinder wall of the engine are not absolutely sealed, but there is a certain gap.

The most interesting focus of Wuling Glory is "Big", which is 4m long, 1620mm wide and 19 15mm high. Compared with the traditional minibus (below 3.8m), the length, width and height are increased, and the large size brings large space. Wuling Glory has more riding and loading space than ordinary extended minibuses. In 20 12, Wuling Glory was upgraded in an all-round way. The length of the whole vehicle was lengthened to 4490mm, and the width and height were 16 15mm and 1900mm, respectively, from the original 7 seats to 9 seats, so there was more room.