Intake Manifold: Description and Operation

Intake System / Turbocharging

Air routing / Air cleaner

As a result of omission of the hot-film mass air flow sensor, air routing of the intake air from the air cleaner to the electronic throttle has been dethrottled in the V8 engines.







New pressure sensor on the intake manifold V8 DFI (naturally aspirated and turbo engines)







Like on the Panamera engines, the new pressure sensor on the intake manifold replaces the previous hot-film mass air flow (MAF) sensor. In order to ensure that the correct mixture composition is always present in the combustion chambers, the actual intake air mass is continuously measured using a pressure sensor for measuring the mass air flow. As a result, the correct mixture is always available in the combustion chambers, and any changes in the atmospheric pressure (due to changes in altitude) and outside temperature are compensated. This new pressure sensor replaces the previously installed hot-film mass air flow measurement system and also contributes to increased performance by dethrottling the intake section.

NOTE: The load signal of the pressure sensor and the intake air temperature can be found under the DME actual values.

The pressure sensor detects the intake manifold pressure (at the rear of the intake manifold). On the basis of this information, the DME control unit determines the respective air mass and intake temperature from different maps.

Advantages of the pressure sensor
- Power increase through dethrottling of the intake section
- Higher precision for small air flows
- High resistance to soiling
- Lightweight design (the pressure sensor replaces 2 MAF sensors)

Intake air temperature sensor

The integrated temperature sensor measures the intake air temperature on both naturally aspirated and turbo engines.