Quote:
Originally Posted by gpsman1
Getting ( well, keeping ) a water temp of 190'F is impossible in a Ford Escape during the city drive cycle.
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I would like to say it's not impossibe but hard or long way.
There are a lot of factors you take a lot of time to raech the optimum 190F.
- short city driving
- cold environment
- cold initial coolant temperature
- grill block is not enough
However, the 140F pulse and glide driving is not trying to set optimum temperature by Ford 190F thermostat mechanism.
Back to the original point...
Quote:
Originally Posted by gpsman1
I usually net 10% better ( 44 MPG vs. 40 miles per hour ) compared to steady driving. I account some of it to thermal effects. The fewer number of minutes my ICE is on, the fewer minutes I am dumping heat into the radiator/environment... and by running the ICE water at 140'F with P&G vs. 188'F with constant on, there is slower heat loss to the environment by conduction/radiation... yes?
Quote:
Originally Posted by ken1784
I think you're still in Stage 2 when you see 140F(60C).
On Prius, the thermostat starts to open at 180F(82C) and we see around 189F(87C) even on driving with P&G.
If your heater was turned ON, it's another story.
Ken@Japan
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Again, the 140F city pulse and glide driving is not optimum, and FEH is designed to run 190F optimum temperature.
Ken@Japan