7.5.3) Fuel injection control
The engine is equipped with an electronic fuel injection system.
This system is controlled by the ECU and enables highly accu-
rate metering of the fuel according to operating and load condi-
tions, whilst at the same time also taking ambient conditions
into account.
The key input variables are throttle valve position, engine speed
signal, intake air temperature, ambient pressure, boost pres-
sure and exhaust temperature. Ultimately, the required fuel
quantity or injection period is determined.
On the basis of the calculated air density in the airbox. It is
monitored continuously.
7.5.4) Communication interfaces
Each Lane has a maintenance and a display interface (CAN-
bus). While the maintenance interface is required to work with
the BUDS Aircraft Diagnostic Software to perform vari-
ous diagnostic and maintenance activities, the display CAN in-
terface enables the connection of a display for visualization of
engine parameters.
B.U.D.S Software
For engines of the ROTAX® 915 i A Series, the maintenance
and BUDS Aircraft Diagnostic Software is available.
This provides not only the reading of ECU logs, it also provide a
variety of functionality to support troubleshooting of the engine.
To start this software and connect the engine with a computer a
BUDS Aircraft Diagnostic Software kit is required. This
is a USB adapter that provides different software functionality
depending on its version.
Page 7-12
December 01 2017
BRP-Rotax Effectivity: 915 i A Series
Edition 0 / Rev. 0
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