Driving Assistance Thread: ACC, LKA, ALK, and InnoDrive

[tutis]

This, from the manual, is still plenty confusing:

I think of it like this:

• PID: Porsche InnoDrive adjusts your car's speed to posted limits
• ACC: Adaptive Cruise Control adjusts your car's speed down from or up to the speed set on cruise control based on other drivers (slower cars, cars pulling in front of you, etc.)
• LKA: Lane Keep Assist keeps you from driving out of your lane if you fall asleep (bounces you off the lane lines)
• ALK: Active Lane Keep drives your car smoothly down the lane (without bouncing off the lane lines)

i think you have a good fundamental idea. I would add the PID is more than just a cruise control that reads road signs… it will calculate ahead the radius of a bend and determine the speed it should reduce to so that a maximum go force is not exceeded (g force itself being dependant on the driving mode, sportier mode allows for higher g force.). For example I’ve driven with PID coming and driving through a roundabout without touching the pedals (but steering myself). The car brakes to a speed much lower than the speed limit, allows me to take the roundabout and a reasonable speed and then accelerates back up to the speed limit. If I come to a junction it will nearly stop the car. It’s way more than cruise control with speed limit reading capability

 

[4thPcar]

the LKA is really there to prevent you from going over the line ; think of it as a help in case you turn to the back seat because your child made a weird sound and you car is about to run into the ditch.Or maybe you’re really tired and you fall asleep for a second. LKA is there to save you (at least that’s the idea)

ALK however is there to take the edge off the driving. It’s less of a safety system, although it also has safety benefits. Imagine for à seins you were driving behind a car just 10 feet behind it at 100mph for a long distance. You’d be constantly under tension, apprehensive of a sudden braking of the car in front. This emotional tension would wear you down. However if you were driving at the same speed but at a greater distance andwith ACC that you completely trust you would be much more relaxed. ALK is supposed to bring you the same “relaxed” benefit when driving but more by keeping you centred In your Lane and without you needing to be tense or constantly correcting with your steering wheel. Think of it as doing for lateral correction what ACC does for automatically adjusting your speed. LKA in that sense is more similar to emergency braking than it is to ACC.
Hope this all makes better sense. Either way, LKA symbol on dash are two green lines representing the edge of the road, ALK has a green steering whee placed between the lines.

THANK YOU! great explanation

 

[Crick]

PID is more than just a cruise control

for sure - was keeping it simple. You're spot on.