An Application Code (6N4C) Group must be selected that is configured for Air Compressor Control at order entry or by contacting Detroit Diesel Technical Service. For additional information, contact your DDC Applications Engineer.ĥ.1.3 PROGRAMMING REQUIREMENTS AND FLEXIBILITYĪir Compressor Controls must be specified at the time of engine order or added to the ECM calibration by Detroit Diesel Technical Service. The proper 6N4D group with multiple 6N4M groups must be specified. Choosing the rating, with the DDR/DDDL or rating switches will automatically select the associated pressure range. The maximum number of engine ratings and pressure ranges is three. A pressure range can be associated with each rating. The pressure ranges are linked to the engine ratings. This feature requires both an EDM and an Auxiliary Information Module (AIM) refer to section 5.6 for addition information on EDM and AIM. Once the air pressure has dropped to a lower programmable limit, the digital output will be open circuited which will either close the vent or open the air inlet.ĭDEC will respond to a proprietary immediate engine shut down message sent over the SAE J1587/J1708 data link by the Electronic Display Module (EDM). This output may be used to either open an air compressor vent or close the air inlet. ![]() When the pressure reaches a programmable limit above the pressure set point the DDEC digital output will be grounded. ![]() Opening the air compressor load switch digital input deactivates the air compressor control system. Releasing the switch sets the compressor controls to the lower setting.Ĭlosing (grounding) the air compressor load switch digital input activates the air compressor control system. Holding the switch in the decrease position (grounding the digital input), will decrease the set point pressure at a rate of two increments per second. Momentarily toggling and releasing the decrease switch decreases set point pressure by 4% of the pressure range. Releasing the switch sets the compressor controls to the higher setting. Holding the switch in the increase position (grounding the digital input), will increase the set point pressure at a rate of two increments per second. Momentarily toggling and releasing the Increase Switch (grounding the "Resume/Acceleration On" digital input) increases set point pressure by 4% of the pressure range. The initial pressure set point is saved between ignition cycles. The minimum and maximum pressure setting for each of the horsepower curves is set with the DDDL/DDR, Vehicle Electronic Programming System (VEPS), or DRS. Horsepower ratings are defined at time of order entry. Table 5-1 Engine Operation with Air Compressor ControlsĮach horsepower rating has an associated pressure range. Once the air pressure has dropped to a lower programmable limit, the digital output will be open circuited which will either close the vent † DDEC will open and close the loading valve as a function of pressure with hysteresis. * The engine will continue to run at PTO maximumuntil the outlet pressure matches the sensor pressure. The air compressor solenoid digital output isĬurrent outlet pressure is above the pressure setĮngine speed decreases as required down to the Pressure in the system continues to increase and The engine response to various pressure conditions is listed in Table 5-1.Ĭurrent outlet pressure is below the pressure setĮngine speed increases as required up to PTO The Air Compressor Pressure Sensor provides a pressure signal to the ECM. Engine speed is governed based on the actual air compressor outlet pressure versus the desired output pressure. The ECM will activate the Air Compressor Governor Controls when the digital input “Air Compressor Load Switch” is grounded. The desired operating pressure may be varied by the operator, within limits preset by the OEM. The ECM monitors the air outlet pressure while varying the engine speed and operating load/unload a valve. ![]() The DDEC Air Compressor Control Feature is available with the following software releases:ĭDEC IV - all software versions (Release 20.0 or later) ![]() Īir Compressor Controlis an optional DDEC feature that allows DDEC to regulate engine speed and load/unload a valve in order to maintain a requested compressor outlet air pressure for air compressor applications. Īll information subject to change without notice. IDLE SHUTDOWN TIMER AND VEHICLE POWER SHUTDOWN. ĥ.4 CRUISE CONTROL FOR DRILLING/PUMPING APPLICATIONS WITH DDEC IV APPLICATION AND INSTALLATION MANUALĪIR COMPRESSOR CONTROL. 5-97 5.17 MANAGEMENT INFORMA TION PRODUCTS. 5-75 5.13 IDLE SHUTDOWN TIMER AND VEHICLE POWER SHUTDOWN.
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