Elegant Forced Auto Stop (Insight)

[Ecky]

I'm really enamored with your FAS. I'll need to dig in my box of goodies and see if I still have an arduino laying around.

[Natalya]

I've pre-programmed a couple more of them and put them for sale on Insight Central. If you want one PM me here or on IC. $18 shipped, or $15 at Insight Fest 2016.

[NoD~]

That's a killer deal! Great job, BTW.

(Where is Insight Fest and when?)

[Ecky]

Forgive me if you've already covered this in one of your posts, but why is it necessary to have a maintaining switch for your FAS module? My experience has been that once my car enters (real) auto-stop, it will stay there even if I'm rolling down a hill and gain significant speed, even without my holding the brakes or clutch.

Regarding your thread on IC, I think a visual diagram would be helpful for installation, even if it's just a terrible M$ Paint drawing.

[Natalya]

Originally Posted by Ecky

Forgive me if you've already covered this in one of your posts, but why is it necessary to have a maintaining switch for your FAS module? My experience has been that once my car enters (real) auto-stop, it will stay there even if I'm rolling down a hill and gain significant speed, even without my holding the brakes or clutch.

Regarding your thread on IC, I think a visual diagram would be helpful for installation, even if it's just a terrible M$ Paint drawing.

Request approved.


So if my car enters Auto Stop normally, the second I release the brake or clutch, the engine restarts even in Neutral. That's why I specify a maintaining switch. However, I have noticed that when I use my EFAS switch to get Auto Stop the car doesn't restart itself. I guess I would say to be on the safe side use a maintaining switch, but maybe experimenting with a momentary switch will show that it's okay.

[Natalya]

Originally Posted by NoD~

That's a killer deal! Great job, BTW.

(Where is Insight Fest and when?)

Last weekend of August 2016 in Indiana.

http://ecomodder.com/forum/showthrea...tml#post520058

InsightFest 2016 - Insight Central: Honda Insight Forum

Some of the info in OP of the IC thread is out of date, read the posts at the end of the thread. You should absolutely go, there will never be anything like it again. Ecky should come too.

[Ecky]

I dunno if it's possible or easy to implement, but I think it would be pretty neat to just have the FAS board in-line with the VSS, and have it do the switching via software. Otherwise, I think I'd use a momentary switch and a relay instead of your proposed version.

[Natalya]

Well another way would be have a button activate a SPDT relay that switches the signal to the ECM from the VSS to come from the board when you press the button, but now you've added a relay and an extra ground wire and a power source for the relay.

If the microcontroller acts as a repeater of the VSS signal until you press a button, I think this lets you omit a wire from the VSS to the button, but now you've got a wire from the microcontroller to the button and back, so it's the same level of complexity. I don't know if one of these is capable of reproducing the exact VSS signal as the signal changes. Maybe by using the TXD and RXD pins it could do that fairly reliably. Then again, it doesn't really matter if the ECM gets a signal that's slightly off.

*EDIT*
I just read your post again, are you talking about like a smart version where there are no buttons, you just drive and it goes into AS for you?

[Natalya]

Okay I've got the wheels turning here...

Imagine:
- DPDT relay on your brakes, so when brake is depressed (or you press a brake switch) the relay is activated.
-- One side of the relay takes clutch switch and opens the circuit (so you get regen)
-- Other side of the relay sends a 5v signal from the VCC pin on the arduino to another unused pin
- Now the arduino knows when the brake is being pressed

- VSS goes to a pin on the arduino instead of a switch
- Pin A1 on arduino goes to the ECM (as in current setup)
- Another connection is made to the shifter, that determines when shifter is in neutral
- When shifter is in neutral use a relay to send +5v from Arduino VCC to another pin
- Now Arduino knows when you're in Neutral

- Arduino gets reprogrammed as follows
- By default it echos VSS to the ECM
- When you put into neutral and tap the brake (or brake switch) it starts spamming ECM with the 1mph square wave instead of whatever the VSS is actually saying
- When you go to any gear (out of neutral) it sends the normal VSS signal back to ECM

So now, we eliminate a dedicated switch to EFAS. Instead, all you do is put it in neutral and press the brake. What do you guys think about this?

Problem:
I don't know how to tell the arduino that the car is in neutral, I'll have to figure that out. I bet there's a circuit somewhere that tells this to the ECM.

Problem 2:
Can the arduino reliably mimic the VSS signal? I could probably figure this out by comparing ScanGauge speed with speedometer speed.

[Ecky]

Question: Does auto-stop continue even if the outside air temperature sensor is only within range momentarily?