EBL - DFCO rpm drop to exit
07-22-2010, 05:00 PM
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Car: 1991 Camaro RS
Engine: 355 Vortec TBI
Transmission: T56
EBL - DFCO rpm drop to exit
anybody know what time frame this parameter uses. Rpm must drop this amount in ??????(sec,msec,usec) to exit DFCO.
07-22-2010, 06:02 PM
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Car: 1992 Firebird
Engine: 305 LO3 TBI
Transmission: T-5
Re: EBL - DFCO rpm drop to exit
No time frame required. RPMs just have to drop the required amount, no matter if it takes secs, mins or hrs. Usually this happens when you depress the clutch when in dfco (if you have a manual trans)
07-22-2010, 07:56 PM
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Car: 1991 Camaro RS
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Re: EBL - DFCO rpm drop to exit
I'm not so sure. Case in point; Today on the way home when i decelerated down a hill, dfco went active at 1900rpm and remained active until 1500rpm (which is my lower threshold for dfco). My DFCO rpm drop to exit is only set at 50rpm.
I'm suspecting that, with a stick car and no neutral switch, this setpoint is to determine how quickly the rpms are dropping. if it is above the setpoint, the car must be in neutral (or the clutch is in). If below, keep dfco. For the setpoint to work it must be converted to a rate of change using some time interval (ie. 50rpm/sec, 50rpm/msec, 50rpm/usec, etc).
I'm suspecting that, with a stick car and no neutral switch, this setpoint is to determine how quickly the rpms are dropping. if it is above the setpoint, the car must be in neutral (or the clutch is in). If below, keep dfco. For the setpoint to work it must be converted to a rate of change using some time interval (ie. 50rpm/sec, 50rpm/msec, 50rpm/usec, etc).
07-23-2010, 07:30 AM
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Re: EBL - DFCO rpm drop to exit
I'm not so sure. Case in point; Today on the way home when i decelerated down a hill, dfco went active at 1900rpm and remained active until 1500rpm (which is my lower threshold for dfco). My DFCO rpm drop to exit is only set at 50rpm.
I'm suspecting that, with a stick car and no neutral switch, this setpoint is to determine how quickly the rpms are dropping. if it is above the setpoint, the car must be in neutral (or the clutch is in). If below, keep dfco. For the setpoint to work it must be converted to a rate of change using some time interval (ie. 50rpm/sec, 50rpm/msec, 50rpm/usec, etc).
I'm suspecting that, with a stick car and no neutral switch, this setpoint is to determine how quickly the rpms are dropping. if it is above the setpoint, the car must be in neutral (or the clutch is in). If below, keep dfco. For the setpoint to work it must be converted to a rate of change using some time interval (ie. 50rpm/sec, 50rpm/msec, 50rpm/usec, etc).
RBob.
07-23-2010, 07:47 AM
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Re: EBL - DFCO rpm drop to exit
Bones, I completely misunderstood what you were asking. Sorry for that.
You are right and Rbob has already confirmed that.
You are right and Rbob has already confirmed that.
07-23-2010, 10:21 AM
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