What exactly is torque management?
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Registered User
Joined: Oct 2000
Posts: 49
From: Bradenton, FL, USA
What exactly is torque management?
I've been hearing about torque management lately. Anybody have any info on this, or know where I can get some info? I tried a search and couldn't find anything.
Jon
Jon
Registered User
Joined: Jun 2003
Posts: 208
From: Warr Acres, OK
Torque management is a function of the PCM that reduces engine power
under certain conditions. Torque Management is performed for the
following reasons:
To prevent overstressing the powertrain components.
To prevent damage to the vehicle during certain abusive maneuvers.
To reduce engine speed when the IAC is out of the normal operating
range.
The PCM monitors the following sensors and engine parameters to
calculate engine output torque:
Air/Fuel ratio
Mass Air Flow
Manifold Asolute Pressure
Intake Air Temperature
Spark Advance
Engine Speed
Engine Coolant Temperature
A/C Clutch Status
The PCM monitors the torque converter status, the transmission gear
ratio, and the engine speed in order to determine if torque reduction
is required. The PCM retards the spark as appropriate to reduce
engine torque if torque reduction is required. The PCM also shuts
off the fuel to certain injectors to reduce the engine power in the
case of an abusive manuever.
The following are instances when engine power reduction is likely to
be experienced:
During transmission upshifts and downshifts.
Heavy acceleration from a standing start.
The IAC is out of the normal operating range.
When the driver is performing harsh or abusive manuevers such as
shifting into gear at high throttle angles or shifting the
transmission from reverse to drive to create a rocking motion.
The driver is unlikely to notice the torque management actions in the
first two instances. The engine power output will be moderate at
full throttle in the other two cases.
The PCM calculates the amount of spark retard necessary to reduce
engine power by the desired amount. The PCM disables the fuel
injectors for cylinders 1, 4, 6, and 7 in the case of an abusive
manuever.
under certain conditions. Torque Management is performed for the
following reasons:
To prevent overstressing the powertrain components.
To prevent damage to the vehicle during certain abusive maneuvers.
To reduce engine speed when the IAC is out of the normal operating
range.
The PCM monitors the following sensors and engine parameters to
calculate engine output torque:
Air/Fuel ratio
Mass Air Flow
Manifold Asolute Pressure
Intake Air Temperature
Spark Advance
Engine Speed
Engine Coolant Temperature
A/C Clutch Status
The PCM monitors the torque converter status, the transmission gear
ratio, and the engine speed in order to determine if torque reduction
is required. The PCM retards the spark as appropriate to reduce
engine torque if torque reduction is required. The PCM also shuts
off the fuel to certain injectors to reduce the engine power in the
case of an abusive manuever.
The following are instances when engine power reduction is likely to
be experienced:
During transmission upshifts and downshifts.
Heavy acceleration from a standing start.
The IAC is out of the normal operating range.
When the driver is performing harsh or abusive manuevers such as
shifting into gear at high throttle angles or shifting the
transmission from reverse to drive to create a rocking motion.
The driver is unlikely to notice the torque management actions in the
first two instances. The engine power output will be moderate at
full throttle in the other two cases.
The PCM calculates the amount of spark retard necessary to reduce
engine power by the desired amount. The PCM disables the fuel
injectors for cylinders 1, 4, 6, and 7 in the case of an abusive
manuever.
Registered User
Joined: May 2006
Posts: 559
From: Pothole, Ohio
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