What is the thick hose in front of Buick Excelle engine?

That is, the crankshaft ventilation box is connected to the intake ventilation pipe, which is called the exhaust pipe. This pipe draws the engine oil and gas in the crankcase ventilation box to the front of the throttle valve through the vacuum during air intake, and then enters the combustion chamber for secondary combustion.

The prototype of Excelle is a global medium-sized car newly developed by General Motors, which was designed and developed by GMDAT. On April 2, 2003, KLOC-0, SAIC-GM launched a brand-new mid-level car, the Excelle, which is known as "China Buick". SAIC-GM launched "Buick Excelle Buick Excelle" based on a brand-new product platform, and officially entered the mid-size car market with great potential.