4 ms·
ECUs are simpler to build than the mechanical components they replaced and do things impossible to do mechanically (given the space and weight limits of a car).
by dharmab 5y ago
ECUs are simpler to build than the mechanical components they replaced and do things impossible to do mechanically (given the space and weight limits of a car).
Jadon Cammisa has a great series on this stuff. Here's just one episode on one topic, drive by wire throttle control: https://youtu.be/gKsCHx5NOMM https://youtu.be/gKsCHx5NOMM
- baybal2 5y agoMost drive by wire systems I seen are nothing, but a simplest closed loop PIDs. It's very close to what you are taught in the "How to write a PID controller" class without much extra creativity.
- dharmab 5y agoHave you looked at any vehicle from the past 3-5 years? I own one with drive by wire and you can feel and hear it reacting to variables when you push it to the limits (either in inclement terrain or on a closed course). The linked video has specific video examples from production vehicles as well.
- kevin_thibedeau 5y agoDeciding how much fuel will be injected each cycle is not just a simple PID. The throttle body control may just be a basic servo (although it probably isn't) but the system controlling it is more complicated.
- baybal2 5y agoA separate circuit to map fuel/gas ratio for a given sensor input is also not a rocket science.
- joking 5y agoSimpler to build, and even simpler to overbill for them. Is insane to charge over 1000$ for some replacement logic board.