Distributor: Description and Operation

DOUBLE DISTRIBUTOR WITH HALL SENDER
The 911 Carrera engine is fitted with a twin ignition system, i.e. there are two spark plugs per combustion chamber to ignite the air/fuel mixture. This shortens the spark travel in the cylinder and reduces combustion time while producing a faster pressure increase. In addition, a more stable combustion is achieved thanks to the second spark source, i.e. the differences between one working stroke and another are reduced.

In summary, twin ignition offers the following advantages:

- Higher power output

- Lower fuel consumption

- Improved engine idle

- Improved throttle response with a cold engine with less enrichment requirements

- Reduced emissions

- Hall sender

Hall sender
The twin ignition distributor includes a Hall sender that is required to acknowledge the firing TDC position of cylinder no. 1. The Hall signal is required by the DME control unit to correlate the knock sensor signals or to control the sequential fuel injection.