Edelbrock 3670 User Manual - page 226
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CLC
Closed Loop Compensation: This is the strategy that involves
adapting the fuel delivery based on the Oxygen Sensor
feedback. Small variations in fuel delivery are compensated for
and adapted out during closed loop operation so that actual
AFR equals the desired mapped AFR.
Closed Loop
An operating mode of the PCM enabling adapting fuel and
spark based on a feedback system. By constant exhaust
sampling via the oxygen sensor, a closed loop system allows
engine adjustments to occur while running - in order to
minimize exhaust emissions and provide the desired AFR.
Coil Energy
Amount of energy that a coil outputs. Typically specified in
units of millijoule's.
Combustion Chamber The space remaining at the top of the cylinder when the piston
is at the top dead center position. Where the fuel-air mixture
begins to burn with the valves closed.
Compression Ratio
The ratio of the cylinder volume with the piston at bottom dead
center (BDC) to the cylinder volume with the piston at top
dead center (TDC).
Crank Angle
The value (in degrees) of the crankshaft revolution.
When referred to in the Pro-Tuner Setup Wizard, it describes
the individual crank pin offset from the #1 cylinder. With the
Pro USB key, the user can program custom firing orders for
flexibility in crankshaft designs, including "odd fire"
crankshaft's and "180 degree" crankshaft's.
Crank Sensor
Sensor that indicates crankshaft position to the ECU. This may
be integrated into a distributor or a separate sensor on the
crank (either internal or external to the engine)
CTS
Coolant Temperature Sensor: Sensor that indicates Coolant
Temperature of the engine. Referred to in the Pro-Tuner
system as the ECT sensor. Provides input into engine operation
model for fueling and spark.
D
Data Logger
Recording capability to save chosen parameters for later
review.
DC
Duty Cycle: Percentage of usage based on the devices
capacity. Essentially the duration an actuator is functioning vs.
the total duration possible. Examples would be injector DC and
IAC DC.
Dwell
Ignition Dwell: Traditionally, it was the number of degrees of
distributor rotation with the contacts in the closed position.
More specifically in electronic control, it is the amount of time
(in milliseconds) allowed for the coils to saturate before firing
the spark plug.
E