What are the functions of the eight solenoid valves on the valve cover of Audi a4 engine?

AVS solenoid valve, used to adjust valve lift. Avs adopts the innovative Audi Variable Valve Lift System (AVS), which effectively improves torque and reduces fuel consumption. Audi's world-leading 2.8FSI engine adopts the innovative Audi variable valve lift system (AVS), which effectively improves torque and reduces fuel consumption.

With direct fuel injection technology, the fuel consumption of the 2.8 FSI engine at 90km/h is only 6.7L/ 100km, which has a fuel consumption performance that is hard to match that of the same class. At the same time, the engine still maintains a strong and efficient power output, never at the expense of the slightest driving pleasure.

Extended data:

Working principle of AVS system:

Under the condition of high engine load, AVS system moves to push the cam module 7mm to the right, so that the cam with large angle pushes the valve connecting rod; In this case, the valve lift can reach 1 1 mm, which can provide the best intake flow of the combustion chamber and achieve the strongest power output.

In the case of low load, in order to pursue engine efficiency, AVS system pushes the cam module to the left and pushes the valve connecting rod with a smaller cam. At this time, the valve lift can be adjusted between 2mm and 5.7mm..

The asymmetric intake head design also allows air to enter the combustion chamber in a spiral way; Through the special design of combustion chamber and piston head, the oil-gas mixing in the inclined camshaft in the cylinder is more in line with the design principle of FSI engine.

Baidu encyclopedia -avs (Audi variable valve lift system)

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