Air Conditioning in a Hybrid
#21
08-16-2007, 08:45 AM
Re: Air Conditioning in a Hybrid
Do you think the FEH/MMH A/C clutch is rated for that much cycling? I agree that a complex algorythm is not required. Just an adjustable on/off thermostat control. The only issue I see is that you may have a problem with humidity under some load conditions.
#22
08-16-2007, 09:24 AM
Re: Air Conditioning in a Hybrid
No, I dont think in a sustained use that the clutch would last more than 40,000 mi this is one of the reasons the manufactures dont regulate temp this way. I have to reshim clutches on dodge diesels all the time because people drive around low on freon, which causes the low side presure to drop below the majic pressure. BUT if used for on the highway crusing it would probably be ok, at least for the normal life of an automotive compressor. (About 100k)
#23
08-17-2007, 09:09 AM
Re: Air Conditioning in a Hybrid
<snip>
Personally I would put a clutch pedal, a virtually non-functional clutch pedal, into the FEH/MMH that only actuates a switch. The switch signal would then be used to let the hybrid control system know NOT to use regenerative braking and thereby extend my (intentional) coasting distance. On the other hand if I don't depress the "clutch" pedal that would indicate my willingness to allow the sytem to use regenerative braking as substitute for actual engine compression braking.
Personally I would put a clutch pedal, a virtually non-functional clutch pedal, into the FEH/MMH that only actuates a switch. The switch signal would then be used to let the hybrid control system know NOT to use regenerative braking and thereby extend my (intentional) coasting distance. On the other hand if I don't depress the "clutch" pedal that would indicate my willingness to allow the sytem to use regenerative braking as substitute for actual engine compression braking.
You already have it -- shift to "N" and it does exactly that. No regen, during coast or braking. I use it all the time...
By the way, another great use for it is to dry the brake pads after rain or washing the car. Because of regen the pads are used so little that if they've gotten seriously wet, they become grabby and stay that way for a while. Applying the brakes a few times while the shifter is on "N", it dries the pads out nicely.
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sdctcher
Ford Escape Hybrid
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02-19-2005 04:31 PM
