Rotax MMH-912 Series User Manual

Effectivity 912/914 Series
Edition 1 / Rev. 0
76-00-00
page 9
May 01/2007
d02626
BRP-Rotax
Maintenance Manual
-20
0
20
40
60
80
100
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50
54 58 62 66 70 74 78 82 86 90 94 98
Airbox Temperatur [°C]
(airbox temperature)
Druckreduktion [hPa]
(pressure reduction)
2.1.2.2) Target pressure reduction at excessive airbox tempera-
ture
See Figs. 76-7 and 76-8.
During the compression process in the turbocharger, the
intake air is heated. To reduce the risk of detonation at high
boost pressure with high intake air temperature, lowering of
the target pressure starts at 88 °C (190 °F) airbox tempera-
ture, see diagram (Fig. 76-7).
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0
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120
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180
70
72 74 76 78 80 82
Airbox Temperatur [°C]
(airbox temperature)
Druckreduktion [hPa]
(pressure reduction)
Target pressure reduction will result in a drop in maximum
performance e.g. the power drop can reach up to 10 kW at
80 °C (176 °F) airbox temperature.
◆ NOTE: On TCU part no. 966470 to 966473, the airbox
target pressure reduction starts at 72 °C
(162 °F). See Fig. 76-8.
00902
Fig. 76-8
Fig. 76-7
00178

Rotax MMH-912 Series Specifications

General

Brand	Rotax
Model	MMH-912 Series
Category	Engine
Language	English