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Cruise Control Parameters
Disadvantages:
Cruise control offers few disadvantages. If the Low
Cruise Control setting is set too low it may allow drivers
to operate the cruise in slower city traffi c which may not
be desirable. However, if Low Cruise Control is set too
high the driver will not be able to use it when climbing
long grades.
Using the standard cruise (by setting Caterpillar’s
SoftCruise speed control to “off”) can cause the driver
to sense uneven fueling - rapid fuel on/fuel off. This may
discourage the use of cruise control and negatively
effect fuel economy and driver comfort.
Recommendations:
✔ Use cruise control by setting both the High and Low
cruise control speed limits (HCC and LCC).
✔ Set the HCC at the highest speed you intend the
vehicle to cruise. This may be above the Vehicle
Speed Limit parameter setting.
✔ Do not set the cruise control limit right on top of a
shift point. Driveability may be adversely affected.
Check your settings against a split chart for your
driveline.
RPM
MPH
Do not set Cruise
Control Limits on
top of shift points
Incorrect Correct
✔ To take full advantage of SoftCruise, set the High
Cruise (HCC) parameter to at least 3 mph below the
Vehicle Speed Limit Parameter (VSL).
Example: VSL = 65, HCC = 62 or less
✔ On the other hand, to encourage the use of cruise
control, set HCC to 3 mph above the recommended
VSL. This will result in the truck being operated in
cruise, with the HCC speed reached by “bumping”
up the cruise.