I'm wanting to learn to utilize my OBD scanner better.
So far, this is about the best info I can find...
LOAD_PCT =
[current airflow] / [(peak airflow at WOT@STP as a function of rpm) * (BARO/29.9
2) * SQRT(298/(AAT+273))]
Where:
STP = Standard Temperature and Pressure = 25 °C, 29.92 in Hg BARO,
SQRT = square root,
WOT = wide open throttle,
AAT = Ambient Air Temperature and is in °C Characteristics of
LOAD_PCT are: Reaches 1.0 at WOT at any altitude, temperature or rpm for
both naturally aspirated and boosted engines.
Indicates percent of peak available torque.
Linearly correlated with engine vacuum
Often used to schedule power enrichment.
So is it simply telling how much of the total available torque is being used at any given instant? Is that info only useful to other engine systems? Is there something (from a maintenance standpoint) that can be assumed from that value? Can you simply look at that value relative to others from the OBD scanner and go "hmmm, it seems that the vehicle could be having this or that problem?)
thx
So far, this is about the best info I can find...
LOAD_PCT =
[current airflow] / [(peak airflow at WOT@STP as a function of rpm) * (BARO/29.9
2) * SQRT(298/(AAT+273))]
Where:
STP = Standard Temperature and Pressure = 25 °C, 29.92 in Hg BARO,
SQRT = square root,
WOT = wide open throttle,
AAT = Ambient Air Temperature and is in °C Characteristics of
LOAD_PCT are: Reaches 1.0 at WOT at any altitude, temperature or rpm for
both naturally aspirated and boosted engines.
Indicates percent of peak available torque.
Linearly correlated with engine vacuum
Often used to schedule power enrichment.
So is it simply telling how much of the total available torque is being used at any given instant? Is that info only useful to other engine systems? Is there something (from a maintenance standpoint) that can be assumed from that value? Can you simply look at that value relative to others from the OBD scanner and go "hmmm, it seems that the vehicle could be having this or that problem?)
thx
