2012 911 Section 2-2 11/3/11 10:15 AM Page 27
911 Carrera 911 Carrera S
2.7 Intake system
2
Air guide The dual-branch air guide (see Fig. 2_424_11, 1) from the engine cover to the air
DME engine electronics
cleaner housing has optimized/derestricted this area of the intake system.
Sound opening The mesh on the sound openings (2) allows the intake sound to travel into the engine compartment, but prevents warm air from the engine compartment from being sucked in.
Fig. 2_424_11 to 2_426_11 1
Two-branch air guide from the air intake on the engine cover to the
2
Sound openings at the bottom and top of the air cleaner housing
3
Silencer (resonator) in the air cleaner housing
4
Diaphragm cell between the intake and silencer in the air cleaner housing
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air cleaner housing
2_424_11
on both engines 5
Flap in the air cleaner housing silencer
Silencer Both engines have a silencer (resonator) in the air cleaner housing that is activated
2_425_11
via a flap.
Switching points of the flap on the 3.4-liter and 3.8-liter engines: The resonator is closed for the most part, it is open between 4,500 and 6,000 rpm (irrespective of button pressed or load).
5
4 2_426_11
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