Rollover a number in the diagram to learn more

about VANOS components.

oil pump

sprocket

timing

chain

tensioning

rail

VANOS

intake

camshaft

guide rail

(top)

VANOS

exhaust

camshaft

guide rail

(bottom)

camshaft

sprocket

oil pump

drive chain

chain

tensioner

Double-VANOS in a nutshell...How it benefits a Motorer. CLICK HERE

The VANOS system is based on a mechanism that can modify the position of the intake camshaft relative to the crankshaft. Double-VANOS adjusts both the intake and exhaust camshafts. VANOS operates on the intake camshaft in accordance with engine speed and accelerator pedal position.

 

The BX8 engines use infinitely variable Double-VANOS, which significantly enhances emission management, increases output and torque, and offers better idling quality and fuel economy.

 

• At the lower end of the engine-speed scale, the intake valves are opened later,

   which improves idling quality and smoothness.

• At moderate engine speeds, the intake valves open much earlier, which boosts

   torque and permits exhaust gas re-circulation inside the combustion chambers,

   reducing fuel consumption and exhaust emissions.

• At high engine speeds, intake valve opening is once again delayed, so that full

   power can be developed.

 

An advantage of Double-VANOS is that the system controls the flow of hot exhaust

gases into the intake manifold (EGR valve function). This is referred to as "internal"

exhaust gas re-circulation, allowing a small amount of exhaust gas to be recycled.

VANOS is a combined hydraulic and mechanical camshaft control device managed by the vehicle's engine management system. This has made it possible to achieve functional improvements in full load, partial load and idling mode and to reduce pollutant emissions.

VANOS

You could call it "Variable Nockenwellensteurerung",

but heck...VANOS just seems like an easier way to go.