Rotax 914 series User Manual

Effectivity: 914 Series BRP-Powertrain page 7-9
OM Edition 2 / Rev. 0 April 01/2009
d04479.fm
7.5) Turbo charger and control system
General note The ROTAX 914 engine is equipped with an exhaust gas turbo-
charger, making use of the energy in the exhaust gas for precom-
pression of the intake air (boost pressure).
Regulation boost
pressure
The boost pressure in the airbox is controlled by means of an elec-
tronically controlled flap (wastegate) in the exhaust gas turbine.
NOTE: The wastegate regulates the speed of the turbo-
charger and consequently the boost pressure in
the airbox.
Throttle position See Fig. 5
The required nominal boost pressure in the airbox is determined
by the throttle position sensor mounted on the carburetor 2/4. The
sensor’s transmitted position is linear from 0 to 115 % correspond-
ing to a throttle position from idle to full power.
Fig. 5
03044
100%
115%
0%

Rotax 914 series Specifications

General

Bore	79.5 mm
Stroke	61 mm
Compression Ratio	9.0:1
Cooling System	Liquid-cooled cylinder heads, air-cooled cylinders
Redline	5800 rpm
Engine Type	4-cylinder, 4-stroke
Fuel Type	Avgas 100LL
Oil System	Dry sump
Fuel System	fuel injection
TBO (Time Between Overhauls)	2000 hours
Displacement	1.211 liters (1211 cc)
Power Output	84.6 kW (115 hp) at 5, 800 rpm