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
120
140
160
180
200
220
50
54
58
62
66
70
74
78
82
86
90
94
98
Airbox Temperatur [°C]
(airbox temperature)
D
ruc
kr
edu
kt
ion [
hP
a]
(pr
es
sur
e r
educ
tion)
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).
-20
0
20
40
60
80
100
120
140
160
180
70
72
74
76
78
80
82
Airbox Temperatur [°C]
(airbox temperature)
D
ruc
kr
eduk
tion [
hP
a]
(pr
es
sur
e r
educ
tion)
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
Summary of Contents for MMH-912 Series
Page 463: ......
