General > General Technical Chat
Average car contains 100 million lines of code, The State of Autosoftware
MadScientist:
--- Quote from: bigfoot22 on January 28, 2023, 02:48:55 pm ---Yeah I bet you don't run the factory battery in that Kia though. My neighbour bought a Kia about 7 years ago and shes had to replace the battery twice and call out the mechanic twice until I mentioned to her that she should get an AC Delco or Bosch battery for it.
Its been solid ever since.
--- End quote ---
Can’t say what battery it is but it’s on its original
MT:
--- Quote from: Berni on January 27, 2023, 07:27:25 am ---Yep a lot of people just completely freeze in emergency situations. They are not sure what to do in the stress of it all, so they end up doing nothing, or doing one thing over and over and over.
Because of this quite a few unintended acceleration events can be attributed to the driver simply mixing up the brake and throttle pedals. Something happens like an obstacle or taping the accelerator while thinking they are on the break, they panic and as the default response slam on the brake pedal as hard as they can...however there foot ends up being above the accelerator pedal. The car starts going faster they panic even more and press the pedal even harder, up until they end up crashing into a wall.
In the event of an bug in the ECU making the car go full throttle can indeed be stopped in a whole range of ways. Like you can turn the key (tho this doesn't directly kill power to everyiyng, ECUs shut down with a delay to have time to safely save data), you can press in the clutch, if you have an automatic you can shift it into neutral. stomping on the brakes hard will bring a car to a stop even if its hurtling down the highway at full throttle...etc But the driver has to think of one of those and do it, yet most people have no idea how a car actually works, so they have no idea what to even do. As far as they are concerned the car is actively trying to kill them and they can't do anything because the car is not acting normal.
Handbrake probably can't stop a engine at full throttle, but even this thing is now electronic. You press a button and a little motor does its whirly business back there to actually apply the 'handbrake'. It is not even a hardwired switch that gives it power directly, it is soft button that tells electronics to do it. Cars also don't have keys anymore, but the ones with a start button typically have a safety feature that it will do an emergency shutdown if you hold the button or press it 3 times quickly or something while the car is on. Id prefer to have the oldschool key and mechanical handbrake.
Because everyone has a car these days, there will always be dumb drivers that do dumb things.
--- End quote ---
Some potentially deadly dangerous machines are required to have an emergency stop switch. In a car it could also cause an accident, so to override or not override could be a question.
tszaboo:
--- Quote from: Berni on January 27, 2023, 07:27:25 am ---Yep a lot of people just completely freeze in emergency situations. They are not sure what to do in the stress of it all, so they end up doing nothing, or doing one thing over and over and over.
Because of this quite a few unintended acceleration events can be attributed to the driver simply mixing up the brake and throttle pedals.
--- End quote ---
I had a situation like that. Throttle was stuck underneath the floor mat. Stepped on the break, car slowed down, put it in neutral and got it unstuck.
I had also the other situation, where I pressed accidently the throttle instead of the break for a fraction of a second because something unexpected happened.
You don't know how you would react in an emergency situation, it depends on your state of mind, and so many other things. It's really like rolling a dice. Or more like playing russian roulette.
Berni:
Yep i have mixed up the brake and accelerator pedal before too, luckily without any accident as a result since i quickly figured out that something felt very wrong.
The issue is the people who react to this situation by pressing the wrong pedal even harder and continuing to do so for multiple seconds while screaming in panic, making the car continue to build more and more speed until they crash into something at a dangerous amount of speed.
Getting a drivers license involves getting the hang of a lot of car related skills. However they don't tend to teach how to react in emergency situations. So when such an emergency happens they have seen it for the first time and have to figure out what to do on the spot. While being trained on how to respond in such a situation will make them already subconsciously react to it. This is why pilots are put trough a wide range of simulated aircraft failures. Something similar should be part of getting a drivers license.
Here in Slovenia, about 10 years ago they have have introduced a new requirement for getting a drivers license. It is going trough the safe driving testing grounds where they can simulate various road hazards. They use a smooth plastic coated road surface to simulate slippery/icy conditions. Then they have you drive a slalom between cones on it, brake hard with just half of the wheels on a slippery surface, drive around a corner that transitions to slippery half way, drive down a hill on it, evade a random appearing obstacle in the form of a water curtain, knock your rear out on it using a hydraulic platform...etc. This is excellent training to show drivers how the car reacts when it is not fully under control, so that when they get into a hairy situation on the road they know what to do and what to expect.
PlainName:
I quite fancy going to Slovenia just to get a license :)
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version