Paccar MX Series, Руководство по программированию

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PEC017
5/3/2018
Page 14 of 105
6.0 Idle Settings
Engine Idle Speed
Overview
Engine Idle Speed ( N052 ) defines the minimum engine operating speed. The engine
idle speed is defaulted to 650 RPM from the factory, and is adjustable to a maximum
speed of 700 RPM.
Programmable Parameters
N052 Page 14 Min Default Max Units
Engine Idle Speed
650 650 700 RPM
Engine Idle Shutdown Timer (EIST)
Overview
The engine Idle Shutdown Timer (EIST) is a valuable tool fleet owners may use to
impose limits on engine idling time to improve overall fuel economy. The EIST has
several customizable options to meet the needs of any application. EIST may be
overruled by fuel temperature or engine coolant and oil temperature for uninterrupted
engine warm-up intervals and allows for separate timer intervals dependent on the
engagement of the parking brake. EIST may also be configured with an independent
timer or disabled completely while the engine is in Power Take-Off (PTO) mode.
Standard Feature

EIST

EIST Low Battery Voltage Overrule
EIST initiates when engine speed is at idle, the vehicle is stationary, and the
accelerator pedal is motionless or not depressed. Within the standard feature, there
are many programmable parameters:

Timer Durations and Enablement Conditions

Coolant, Oil, and Fuel Temperature Overrule

Programmable resets
Idle Time w/ Parking Brake Set ( N187 ) specifies the timer duration until the engine
shuts down while the parking brake is engaged, while Idle Time w/ Parking Brake
Released ( N188 ) specifies the timer duration until the engine shuts down while the
parking brake is disengaged. Once the timer has expired, a warning message in the
truck’s driver display will indicate that shutdown is imminent.
Idle Timer Shutdown
Warning Duration ( N194 ) determines the duration of the idle shutdown timer warning
before the engine is shut down. Allow Idle Timer Reset During Warning ( N178 )
specifies if the driver will be able to reset the idle timer by performing one of the
programmable reset conditions during the idle shutdown warning period. Otherwise,