SECTION 3. Engine operation overview
Figure 2: Comparison of measurement data: B140F with H
ORNET
-III vs. B140F ClubSport with H
ORNET
-
III-ClubSport.
•
Pump pressure
: This is plotted to visualise how quickly the pump reacts.
As the engine has to slow down the acceleration towards maximum RPM to prevent overshoots, we meas-
ured the time from the controller signal assuming its maximum value to the engine reaching 98% of the max-
imum RPM (note the vertical green lines in Figure 2). With this definition of the acceleration phase, the
H
ORNET
-III-controlled engine took 3
.
1
s
, while the H
ORNET
-III-ClubSport-controlled engine took 2
.
1
s
. The
pump pressure curve is not as smooth as for the H
ORNET
-III-controlled engine, as the pump reacts more
quickly and the PI-controller is more aggressive.
8
