Passmart - Detroit Diesel DDEC VI Application And Installation

DDEC VI ELECTRONIC CONTROLS APPLICATION AND INSTALLATION
5.20

PASSMART

The PasSmart feature is available on selected on-highway engines equipped with a Vehicle
Speed Sensor.
5.20.1 OPERATION
The PasSmart feature allows a fleet manager to enable a second Vehicle Speed Limit (VSL) above
the normal VSL to assist while passing other vehicles on the highway. This second VSL is
programmed for a limited duration (PS Pass Speed Duration)during a given time period (PS Pass
Speed Interval). The passing speed interval starts when the feature is programmed. An interval of
8, 12, or 24 hours will always reset at midnight.
The driver activates PasSmart by double-pumping the accelerator pedal. Starting at the full
throttle position, the driver releases the throttle completely, returns the throttle to the full throttle
position, releases it again and then returns to full throttle. If the driver completes this action
within five seconds, PasSmart is activated.
After double-pumping the accelerator pedal, the vehicle is given 20 seconds to accelerate to a
speed above the normal VSL. If the vehicle speed does not exceed the normal VSL in 20 seconds,
the driver must repeat the double-pump action. Once the normal VSL has been exceeded, a new
higher VSL becomes the maximum vehicle speed limit. This limit is the normal VSL plus the
PS Pass Speed Increment.
A passing speed duration timer starts when vehicle speed exceeds the normal VSL and continues
to count until the vehicle speed drops back below the normal VSL. At the end of the passing event
when the vehicle speed drops back below the normal VSL, PasSmart is automatically deactivated
and the driver cannot exceed the normal VSL unless the Accelerator Pedal is double-pumped
again.
PasSmart operates only with the foot pedal and not with the Cruise Control switches or hand
throttle. However, activating PasSmart does not disturb or deactivate Cruise Control if it is on
when the passing event begins. Once the driver has passed the other vehicles and PasSmart has
deactivated, Cruise Control automatically takes over. To deactivate Cruise Control during the
pass, the driver must turn the Cruise Control switch to off.
When the Passing Speed Duration time expires, the AWL will begin to flash one minute prior to
ramping the VSL back down to the normal VSL. The rampdown event always takes 5 seconds
regardless of the Passing Speed Increment programmed into the controller. The rampdown alert
can be distinguished from an engine fault warning in that the AWL flashes for the PasSmart alert
and remains on constantly for an engine fault.
If intervals of 8, 12, or 24 hours are selected, the interval will always reset after the chosen
interval and at midnight. This allows fleets to synchronize the reset with driver change periods.
All other intervals reset from the time they are selected. For example, if you select 4 hours, then a
reset will occur every 4 hours from the time of programming but not necessarily at midnight.
5-117
All information subject to change without notice. (Rev. 01/07)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION