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Engine Data Management
EDM it is now possible to have substantially more diagnostic
information available to you in a timely and usable manner.
The real-time serial data port—a standard feature—permits you to record
scanned parameters in real-time using a user-supplied Palm™ Computer
or laptop PC.
Benefits of Proper Mixture Control
•
Improved engine efficiency
•
Reduced maintenance costs
•
Greater fuel economy
•
Reduced operating costs
•
Smoother engine operation
•
Proper engine temperatures
•
Longer spark plug life
•
Reduced engine vibration
JPI Probes
Temperature
information
processed by the
EDM is captured
by
fast response
,
grounded
JPI
temperature
probes, that
accurately
measure the
small temperature changes—as small as 1°F—that occur during mixture
adjustment.
Temperature and Mixture
In a piston engine only a small portion of the energy from combustion
produces movement of the piston during the power stroke. The majority
of energy passes into the exhaust pipe as hot gasses. By monitoring the
temperature of these exhaust gasses you will have an indication of the
quality of the combustion process. Low compression, non-uniform fuel
distribution, faulty ignition, and clogged injectors diminish the efficiency
of the combustion process that generates power.
From the cockpit you can adjust the fuel/air ratio by a process called
leaning
. Retarding the mixture control changes the fuel/air ratio and
hence the resulting Exhaust Gas Temperature (EGT).
The following figure depicts the mixture and temperature relationship.
