Leutert DPI - Page 14

Digital Pressure Indicator DPI - Bedienungsanleitung
14 Friedrich Leutert GmbH & Co. KG
4) Enter the engine-specific parameters in the ‘Create new Engine’
window.
Dataset
Engine name : Name of the engine
Stroke length : stroke length
Correction rod length : length of the connecting rod
Piston diameter : piston diameter
Engines : engine manufacturer / type
Handheld
Default boost pressure : charge air pressure (standard)
Default meas. cycles : measuring cycles (standard)
Default meas. cylinder : no. of cylinders (standard)
Default strokes : 2- or 4-stroke engine
NOTICE
When determining the length of the connecting rod the dis-
tance between the large end and the small end has to be
considered and not the total length of the connecting rod.
The DPI is able to measure the TDC based on the pressure curve
showing the course of combustion. This is the basis of the power
calculation. For engines with premature combustion for reduction
of nitrogen oxide emissions some peculiarities result regarding the
automatic detection of the TDC. In these cases the check box [NOx]
can be ticked to determine the TDC.
Use the DPI‘s ability to prevent interfering influences on the mea-
surement result by selecting certain measurement settings, e.g. the
number of measurement cycles as basis for averaging. This gives you
results which enable you to compare the measurement data of the
individual cylinders to each other.
5) Save the entries with [OK]. Repeat this step for more engines if nec-
essary.
During the indication process the DPI uses the current measuring settings
for each engine. These will be saved until they are redefined.