3 ms·

> the EPA is mandating that the engine stop while the vehicle is stationary How could they use AC and heating with traditional cars, when they had to stay stat

> the EPA is mandating that the engine stop while the vehicle is stationary How could they use AC and heating with traditional cars, when they had to stay stationary for a long time in summer or winter?

kjkjadksj 3y ago
You get like 30 seconds of cold air before the compressor being off is evident. A lot of people turn this “feature” off if they can.
p1mrx 3y ago
I'm not sure exactly what the rule says. I've heard stories of people buying a modern SUV, and needing to push a button on every trip, to disable the start/stop feature. I've also heard of people making a little motorized arm that pushes the button automatically. Edit: It's not strictly mandatory. See page 3 of https://www.govinfo.gov/content/pkg/CFR-2014-title40-vol19/pdf/CFR-2014-title40-vol19-sec86-1869-12.pdf https://www.govinfo.gov/content/pkg/CFR-2014-title40-vol19/p...
- Kon-Peki 3y ago
  > It's not strictly mandatory. My understanding is that if the automaker uses it during the EPA fuel economy test, it must be enabled every time the car starts. If not, the automaker can choose to have it remember your preferences.
RandallBrown 3y ago
I'm only assuming that both of my brand new cars are EPA compliant (they may not be) but they'll just turn back on if it's been long enough to get too cold or warm.
Modified3019 3y ago
My pickup engine stops when I come to a stop, usually, but after some time will start up again if power is needed to continue to run the AC and electronics. Warming up the truck in the winter isn’t an issue, it starts and runs like normal.
kj4ips 3y ago
Heat generally continues to work for quite a while, because there's quite a lot of thermal mass involved. As for the AC, some vehicles have reserve pressure canister that can keep it going for a little bit before they have to cycle back on.

3 ms·

> the EPA is mandating that the engine stop while the vehicle is stationary How could they use AC and heating with traditional cars, when they had to stay stat

by pmontra 3y ago

kjkjadksj 3y ago
You get like 30 seconds of cold air before the compressor being off is evident. A lot of people turn this “feature” off if they can.
p1mrx 3y ago
I'm not sure exactly what the rule says. I've heard stories of people buying a modern SUV, and needing to push a button on every trip, to disable the start/stop feature. I've also heard of people making a little motorized arm that pushes the button automatically. Edit: It's not strictly mandatory. See page 3 of https://www.govinfo.gov/content/pkg/CFR-2014-title40-vol19/pdf/CFR-2014-title40-vol19-sec86-1869-12.pdf https://www.govinfo.gov/content/pkg/CFR-2014-title40-vol19/p...
- Kon-Peki 3y ago
  > It's not strictly mandatory. My understanding is that if the automaker uses it during the EPA fuel economy test, it must be enabled every time the car starts. If not, the automaker can choose to have it remember your preferences.
RandallBrown 3y ago
I'm only assuming that both of my brand new cars are EPA compliant (they may not be) but they'll just turn back on if it's been long enough to get too cold or warm.
Modified3019 3y ago
My pickup engine stops when I come to a stop, usually, but after some time will start up again if power is needed to continue to run the AC and electronics. Warming up the truck in the winter isn’t an issue, it starts and runs like normal.
kj4ips 3y ago
Heat generally continues to work for quite a while, because there's quite a lot of thermal mass involved. As for the AC, some vehicles have reserve pressure canister that can keep it going for a little bit before they have to cycle back on.