Idle Functions

14.0 Idle Functions

14.1 Smart Idle

The “Battery Monitor and Engine Control Voltage”parameter is used to determine when the Battery Monitor and Engine Speed Control System will automatically elevate engine idle to the engine RPM specified in the “Battery Monitor & Low Idle Engine Speed”parameter in order to maintain ideal battery system voltage.This feature is used to promote additional battery life.The engine idle will only be increased if the vehicle is stopped, the transmission isout of gear and neither the clutch nor the brake pedal are depressed.If these conditions are not met, the engine idle will not be adjusted.This feature will not function when the engine is operating in dedicated PTO mode (PTOOn/Off switch in the ON position).The recommended setting is 12.2 Volts for a 12 Volt system, and 24.5 Volts for a 24 Volt system.The engine will stay at this idle speed for 5 minutes (unless interrupted).At the end of 5minutes the engine will return to low idle or a previously established elevated idle speed.If the battery voltage isstill below the programmed trip point the engine will return to the programmed Smart Idle speed for another 5 minutes. NOTE: This feature requires the installation of a Neutral Switch (J1/P1:62 or the SAE J1939 based input message) if the Transmission Style parameter is programmed to AT/MT/HT Option 3, or AT/MT/HT Option 4.

14.2 Extended Idle

Cruise Control switch inputs can be used to control the engine idle speed in Extended Idle mode.Extended Idle isavailable if the engine is not in Cold Mode, Smart Idle (battery voltage induced) is not engaged, Fast Idle is not enabled, the PTO ON/OFF Switch is not ON, Service Brake or Clutch is not depressed, transmission is not in gear, Cruise Pause Switch is not On and the vehicle speed is not equal to or exceeding the programmable Idle Vehicle Speed Limit. Note: Some switch inputs are programming dependent. With conditions met for Extended idle, and the Cruise Control On/Off switch is in the ON position, the engine rpm may be bumped or ramped by using the Cruise Control Set/Resume switch inputs.The amount of engine rpm change for a “bump”is determined by the Idle/PTO RPM Bump Rate parameter.The Idle/PTO Bump RPM Rate isprogrammable from 5 to 1000 RPM (default is 20 RPM).The engine rpm “ramp”value is determined by the Idle/PTO Engine Speed Ramp Rate parameter.The Idle/PTO Engine Speed Ramp Rate parameter is programmable from 5 to 1000 RPM/sec (default is 50 RPM/sec).When the engine speed is “bumped”the engine will ramp to the new rpm at the programmed “ramp rate”. The Cruise/Idle/PTO Switch Configuration parameter programming will determine the direction of the engine rpm bump or ramp.When programmed to Set/Accel – Resume /Decel, the engine rpm will increase with the Set switch and Decrease with the Resume Switch.When programmed to Set/Decel – Resume /Accel, the engine rpm will decrease with the Set switch and increase with the Resume Switch. Pressing and then releasing the Set Switch or the Resume Switch will establish the current engine rpm as the idle “set”speed.The “set”rpm may be established at any engine speed from the programmed Low Idle to the programmed Idle RPM Limit.Once an idle speed has been “set”, the engine speed may be bumped or ramped using the Set/Resume switches.Pressing and holding the Set or Resume switch will establish the engine’s current rpm as the “set”rpm and then after 1 second the engine will ramp at the programmed rate in the direction of the programmed setting for Cruise/Idle/PTO Switch Configuration.The last idle “set”rpm will stay in the ECM’s memory until the key switch has been turned Off. With a “set”idle rpm, pressing an holding the (Set or Resume) /Accel Switch for less than one second will cause the engine rpm to “bump”or increase by the programmed Idle/PTO Bump RPM value.This “bump”process can be repeated until the engine reaches the programmed Idle RPM Limit. With a “set”idle rpm, pressing an holding the (Set or Resume) /Decel Switch for less than one second will cause the engine rpm to “bump”or decrease by the programmed Idle/PTO Bump RPM value.This “bump”process can berepeated until the engine reaches the programmed Low Idle. With a “set”idle rpm, pressing and holding the Set or Resume switch for more than one second will cause the engine to ramp at the programmed rate in the direction of the programmed setting for Cruise/Idle/PTO Switch Configuration.The engine rpm will ramp as long as the switch is held or until the engine reaches the programmed

Idle RPM Limit or the programmed Low Idle.Releasing the Set or Resume switch while the engine rpm is ramping will establish the current engine rpm as the new “set”rpm. If the Extended Idle has been disabled or “kicked out”, the “set”rpm is still in memory.Once the condition for Kickout no longer exists, pressing and releasing the Resume Switch will cause the engine rpm to ramp to the “set”rpm.

14.2.1 Extended Idle kick outs

Extended Idle may be deactivated or “kicked out”by a variety of switch inputs and by exceeding the programmable vehicle speed limit.When Kicked Out, the “set”rpm remains in memory but the engine will return to the programmed low idle rpm.Pressing on the Service Brake or Clutch, shifting the transmission into gear, turning thePTO Switch On or by turning the Pause Switch On, can “kick out”Extended Idle. If the vehicle operation requires that the Service Brake and Clutch switches be used while the engine is in Elevated Idle mode, the Ignore Brake/Clutch switch input can be used.With this switch enabled, the Service Brake and Clutch may be used to control the vehicle speed while the Extended Idle is Active. In the following table, an “L”means the input can return the engine to low idle from a set speed, a “A“ means the input can adjust engine rpm, and “P”means the input function is programmable to a limit.

ECM Input Result Cruise On/Off L Cruise Set A Cruise Resume A Cruise Pause L Service Break L Clutch L Neutral L Fast Idle A Idle Vehicle Speed Limit L Throttle A

OEM provided and installed components required: 1) Cruise Control Switches 2) Service Brake Switch #1 3) Clutch, Service Brake #2 and Neutral switches are transmission style dependent Customer Parameter programming required: 1) Idle Vehicle Speed Limit (1 – 15 mph) 2) Idle RPM Limit (700 – 2640 RPM) 3) Idle PTO Ramp Rate (5 – 1000 RPM/s) 4) Idle Bump Rate (5 – 1000 RPM)