Maaany years ago read about a figure that made sense to me...  The delta t from a internal combustion engine related to the ambient temperature its cooling radiator was exposed.

Cannot remember now.  Was something like outlet temperature minus ambient temperature equals something near constant.  Or ambient temperature plus inlet temperature equals a near constant figure.  That ideal figure escapes me now...

Any light or explanatory link please ?

 

 

Do you recall any symbols associated with the equation?

Kind of sounds like thermal conductivity, but I'm not sure that is what you are thinking of.

Thanks,  Endy.

Myself cannot discern how to express it.  Too many years ago.    Perhaps...The expected coolant temperatures on a properly working IC engine related to ambient cooling air temperature, if that makes sense.

Was like...  Ambient degrees F + 100F = IC outlet temperature.

The "100" here was a fixed number am after,  near 90, or 100 or +...   ¿?

Radiator inlet/engine temperature is controlled by a thermostat which opens up the flow of coolant to the radiator at a set point, cooling the engine.  This regulates the engine temperature.