The Audi Valve Lift System (AVS) was first introduced in 2008 on the 2.0 TFSI engine and V6 turbocharged engines. The system changes the amount of lift of the intake and exhaust valves. The camshaft has two lobes that are controlled by an electric solenoid. The system can do a neat trick with the valves. The throttle body can be 100 percent open and the air ingested into the engine is controlled by the valves. The advantage is that the obstruction of the throttle butterfly is minimized. Also, the air entering the engine is less turbulent
The Audi Valvelift System (AVS) regulates the lift of the valves in two stages, depending on load and engine speed. The system increases torque while also reducing fuel consumption. Two versions of the AVS system are in the field. In the V6 engines in which AVS is used, it acts on the intake valves, largely regulating the amount of intake air. The other version can be found on the 2.0 TFSI engine.
With the recent changing of seasons, it is possible to see a 20- to 30-degree temperature change from when the car is parked in the evening and driven again in the morning. Some customers may say they think the ambient temperature is not reading accurately. To achieve a "smoothing" effect of the displayed outside ambient temperature, the value shown does not instantaneously follow the temperature sensor measurement.
Technical Service Bulletins can be valuable in helping solve vehicle problems. But sometimes, it takes multiple TSBs to find a pattern failure or the “root cause” of a problem. In the case of the Audi/VW 2.0L Fuel Stratified Injection (FSI) engine introduced in 2006, three problems related to engine carbon and fuel issues are connected
Models: F97 X3 M F98 X4 M G01 X3 G02 X4 G20 3-Series SITUATION After replacing the microfilter during a previous service, the customer notices that the ventilation system airflow rate is noticeably less. This leads to perceived lower cooling power. The customer may also notice that external odors enter the vehicle. Related Articles –
BMW has offered Tire Pressure Monitoring Systems (TPMS) for more than 20 years. These early indirect and direct systems were implemented not to meet the 2007 government mandate but to inform the driver when an expensive Michelin or Bridgestone run-flat tire was deflating. Some 2002 and 2003 models have an indirect system called Flat Tire