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> I assume implicit to this statement, is that some heuristic algorithm needs to be created to turn the car off. If you say so. I'm pretty sure just turning th

> I assume implicit to this statement, is that some heuristic algorithm needs to be created to turn the car off. If you say so. I'm pretty sure just turning the car off if there's nobody sitting in any of the seats and the key is not in the car would be a good start.

kss238 9y ago
Have you never turned your car on before you left to heat up the passenger compartment?
- ygra 9y ago
  Uhm, apart from the fact that it's actually forbidden, no. Idle takes ages to warm up the engine, it's better to just start driving.
  - jakobegger 9y ago
    If you live in a cold climate, you often have to let your car idle for a few minutes to heat it up, or your windows will be all foggy and you don’t see a thing.
    - rpcope1 9y ago
      It's also really hard on the motor if the fluids are cold, as you're more likely to induce wear because of boundary lubrication and similar effects. Additionally, like on my truck, the synchronizers on the transmission are really cranky when they're cold, and it's hard to get it moving without warming up a little bit.
  - megaman22 9y ago
    You kinda need the car running for the heaters to work.
  - pwinnski 9y ago
    Forbidden how? I'm not sure why remote-start exists if it's forbidden to use it.
- justin66 9y ago
  > Have you never turned your car on before you left to heat up the passenger compartment? With the remote start system I have a passing familiarity with, if you remotely start the car and warm it up with no person and no key in the car, the car automatically shuts off fifteen minutes after it has started if someone doesn't get in with a key. Seems to be compatible the simple guidelines I mentioned.
otherme33 9y ago
"Key not in the car" should be condition enough. I'm having a hard time thinking of a scenario where you NEED to have the key away from the car while the engine is running.
- hanbura 9y ago
  That would lead to far more accidents where people leave kids or animals alone in a car in direct sunlight, assuming the AC will keep them cool. But as they step away from the vehicle, the engine and AC turn off, leaving anyone in the car to die from heat stroke. Those people don't need to take the car key with them, but with a keyless car you don't think about the key (that's the entire point of keyless cars). The key is just one of many things in your pockets.
  - dx034 9y ago
    Isn't keeping a car running with children inside incredibly dangerous? What if they release the breaks or shift to drive? I'd think taking the child with you should be safer than leaving them in a running car. For animals that's different of course. But wouldn't an override be enough?
    - olyjohn 9y ago
      When I was a kid, I was at my babysitter's house waiting to be picked up by my parents. Another kid's parent showed up, parked her car, and put one of her kids in the front seat. Her other kid ran in the house, and she ran after him. The first kid let the e-brake off, and the car went rolling down the driveway and hit a tree. It didn't roll very fast, so there was no damage and nobody was hurt. But the mom was freaked out as she came back out 10 seconds later and saw the car rolling away... This was in the late 80s. The car wasn't running. It was a mechanical e-brake. I know a lot of cars have electronic parking brakes now, but most probably still don't. On another note, I can't think of a single car that will let you take it out of Park without a foot on the brake, or without using an override.
  - abraae 9y ago
    AC could fail for many reasons. Leaving a child in a car where they were dependant on AC for their life would be criminally negligent.
zaarn 9y ago
Even simpler. If two of three conditions are met, switch engine off: * Rising Carbonmonoxide levels * No weight on driver seat for 3 minutes * No driving activity for 3 minutes The first factor alone should already prompt a shutdown though. It wouldn't even matter if the key was in the car, that might happen by accident and isn't a terribly good indicator.
- justin66 9y ago
  I don't think this is actually simpler. I was deliberately trying to give an example that didn't require any new sensor tech. I don't think the cars have monoxide detectors right now.
hanbura 9y ago
Determining whether anybody is in the car doesn't sound trivial beyond the driver seat. The seatbelt warnings are triggered by weight, but people frequently store stuff on their seats, and occasionally that stuff has a weight plausible for a human

kss238 9y ago

Have you never turned your car on before you left to heat up the passenger compartment?

ygra 9y ago
Uhm, apart from the fact that it's actually forbidden, no. Idle takes ages to warm up the engine, it's better to just start driving.
- jakobegger 9y ago
  If you live in a cold climate, you often have to let your car idle for a few minutes to heat it up, or your windows will be all foggy and you don’t see a thing.
  - rpcope1 9y ago
    It's also really hard on the motor if the fluids are cold, as you're more likely to induce wear because of boundary lubrication and similar effects. Additionally, like on my truck, the synchronizers on the transmission are really cranky when they're cold, and it's hard to get it moving without warming up a little bit.
- megaman22 9y ago
  You kinda need the car running for the heaters to work.
- pwinnski 9y ago
  Forbidden how? I'm not sure why remote-start exists if it's forbidden to use it.
justin66 9y ago
> Have you never turned your car on before you left to heat up the passenger compartment? With the remote start system I have a passing familiarity with, if you remotely start the car and warm it up with no person and no key in the car, the car automatically shuts off fifteen minutes after it has started if someone doesn't get in with a key. Seems to be compatible the simple guidelines I mentioned.

otherme33 9y ago

"Key not in the car" should be condition enough. I'm having a hard time thinking of a scenario where you NEED to have the key away from the car while the engine is running.

hanbura 9y ago
That would lead to far more accidents where people leave kids or animals alone in a car in direct sunlight, assuming the AC will keep them cool. But as they step away from the vehicle, the engine and AC turn off, leaving anyone in the car to die from heat stroke. Those people don't need to take the car key with them, but with a keyless car you don't think about the key (that's the entire point of keyless cars). The key is just one of many things in your pockets.
- dx034 9y ago
  Isn't keeping a car running with children inside incredibly dangerous? What if they release the breaks or shift to drive? I'd think taking the child with you should be safer than leaving them in a running car. For animals that's different of course. But wouldn't an override be enough?
  - olyjohn 9y ago
    When I was a kid, I was at my babysitter's house waiting to be picked up by my parents. Another kid's parent showed up, parked her car, and put one of her kids in the front seat. Her other kid ran in the house, and she ran after him. The first kid let the e-brake off, and the car went rolling down the driveway and hit a tree. It didn't roll very fast, so there was no damage and nobody was hurt. But the mom was freaked out as she came back out 10 seconds later and saw the car rolling away... This was in the late 80s. The car wasn't running. It was a mechanical e-brake. I know a lot of cars have electronic parking brakes now, but most probably still don't. On another note, I can't think of a single car that will let you take it out of Park without a foot on the brake, or without using an override.
- abraae 9y ago
  AC could fail for many reasons. Leaving a child in a car where they were dependant on AC for their life would be criminally negligent.

zaarn 9y ago

Even simpler. If two of three conditions are met, switch engine off: * Rising Carbonmonoxide levels * No weight on driver seat for 3 minutes * No driving activity for 3 minutes The first factor alone should already prompt a shutdown though. It wouldn't even matter if the key was in the car, that might happen by accident and isn't a terribly good indicator.

justin66 9y ago
I don't think this is actually simpler. I was deliberately trying to give an example that didn't require any new sensor tech. I don't think the cars have monoxide detectors right now.

hanbura 9y ago

Determining whether anybody is in the car doesn't sound trivial beyond the driver seat. The seatbelt warnings are triggered by weight, but people frequently store stuff on their seats, and occasionally that stuff has a weight plausible for a human