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Auto Retarder in Cruise Increment
Description:
The Auto Retarder in Cruise Increment parameter
works in conjunction with the Auto Retarder in
Cruise parameter and controls the retarder level. It
requires that Auto Retarder in Cruise parameter to be
programmed to a value other than 0 (Zero).
45
55
65
Auto Retarder In Cruise Programmed to 3 MPH
Auto Retarder In Cruise Increment
Programmed to 2 MPH
Low 58 MPH
Medium 60 MPH
High 62 MPH
Cruise Set Speed
Example: The cruise speed is set to 55 MPH and Auto
Retarder in Cruise parameter is programmed to 3 MPH
and Auto Retarder in Cruise Increment is programmed to
2 MPH. When the truck accelerates to 58 MPH, by going
down hill, the Low retarder level will activate. If the truck
continues to accelerate, Medium level retarding would
activate at 60 MPH. High level of retarding will activate if
the truck reaches 62 MPH.
Available:
All electronically controlled on-highway engines
covered in this handbook
Range:
Engine
Range
Cat
Default
Minimum Maximum
C-10, C-12, C-15,
C-16, C11, C13, C15,
2007 C7 & C9
0 MPH
(0 km/h)
5 MPH
(8 km/h)
2 MPH
(3 km/h)
Advantages:
Auto Retarder in Cruise Increment allows the driver to
customize the Auto Retarder in Cruise feature to match
his/her driving style.
The Auto Retarder in Cruise feature provides drivers
who are “graded” for incentive purposes, an automatic
method to control the amount of time above VSL.
Disadvantages:
Programming the Auto Retarder in Cruise Increment
parameter too tightly can result in a degraded fuel
economy. For instance, if it is set to zero, and the Auto
Retarder in Cruise parameter is set to 1 MPH, then all six
cylinders will retard when the vehicle exceeds cruising
speed by just 1 MPH. This can result in less desirable
fuel economy.
Cruise Control Parameters