DBW Cruise Control

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ToyotaHubs
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Re: DBW Cruise Control

Postby ToyotaHubs » Tue Nov 06, 2018 4:47 pm

HaltechMatthew wrote:I spoke a few hours too soon. It is now available to the public in v2.29 firmware released yesterday. Be sure to grab ESP v2.00.35 to go with it.

Thank you!!!

ToyotaHubs
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Re: DBW Cruise Control

Postby ToyotaHubs » Sat Nov 10, 2018 10:39 am

HaltechMatthew wrote:Generally a single input for the switchgear with different resistors on each button. You will also need a brake as well as clutch input if you have a manual trans. Of course you need vehicle speed coming in too. Pretty much it will tell you what you need.


Interesting you guys don't have a resistance input option.

***PROBLEM***
My ECU puts out 10 volts and 5 volts is MAX input. How can I rectify this problem? Resistor? If so, how large?

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HaltechMatthew
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Re: DBW Cruise Control

Postby HaltechMatthew » Mon Nov 12, 2018 11:21 am

All ECU inputs are 5V because that is how just about all ECUs handle inputs to the system. It will be up to you to get it inside this range. Never seen an ECU that outputs 10V for anything!

ToyotaHubs
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Re: DBW Cruise Control

Postby ToyotaHubs » Fri Nov 16, 2018 4:43 am

HaltechMatthew wrote:All ECU inputs are 5V because that is how just about all ECUs handle inputs to the system. It will be up to you to get it inside this range. Never seen an ECU that outputs 10V for anything!

Not exactly 10v, definitely more than 5v on my 2005 Toyota Tacoma 2.7L

I added a voltage divider and am now below 5v
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ToyotaHubs
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Re: DBW Cruise Control

Postby ToyotaHubs » Sat Nov 17, 2018 1:51 pm

I'm having a hard time adjusting settings to maintain speed up a long steady climb and not have the vehicle jerk initially. Even at 1000 it will not maintain speed, though will with stock system it will. The speed falls quite a bit before cruise takes action, even when I maintain petal position to allow it to take action. Please share your successful settings or @HaltechMatthew please elaborate in Layman's terms the settings and your suggestions. To feel more normal, I would like it to take action sooner, but ease into the power on a curve and not so much a line.

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HaltechMatthew
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Re: DBW Cruise Control

Postby HaltechMatthew » Tue Nov 20, 2018 3:13 pm

Keep working with your PIDs, and maybe try lowering the throttle rate. I use 5% to stop my car from being over-reactive.

RS2000
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Re: DBW Cruise Control

Postby RS2000 » Wed Nov 21, 2018 2:08 pm

I see Elite 2500 referenced in the release notes - any ideas when it will be available for the 1500?

HaltechAdam
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Re: DBW Cruise Control

Postby HaltechAdam » Wed Nov 21, 2018 11:32 pm

Latest 1500 Firmware has it.. available now :) Download it from ESP Online or on the website

RS2000
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Re: DBW Cruise Control

Postby RS2000 » Thu Nov 22, 2018 8:32 am

Yes, I loaded the new firmware last night and can see it in the list of functions - awesome - thanks!

LaNcEGT4
Posts: 33
Joined: Mon Jan 09, 2017 12:08 pm

Re: DBW Cruise Control

Postby LaNcEGT4 » Wed Dec 19, 2018 2:20 pm

Whats everyone using for a hand controller? interested in some ideas.

I have a toyota supra, so i know there is an option to use a factory option, but would prefer to move it off the steering wheel if possible.

Something like the command units?

ToyotaHubs
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Re: DBW Cruise Control

Postby ToyotaHubs » Mon Dec 24, 2018 3:22 pm

HaltechMatthew wrote:Keep working with your PIDs, and maybe try lowering the throttle rate. I use 5% to stop my car from being over-reactive.

I found some success adjusting INTEGRAL GAIN negative side to same numbers as default values of PROPORTIONAL GAIN; vehicle will retain speed going up long hills. Unfortunately can not adjust out and find a happy medium between jerky seeking and quick interception of set speed with INTEGRAL & PROPORTIONAL GAIN.

I’m also having a problem with acceleration past set speed after topping a hill (by as much as 7mph, maybe more but I’ve always hit brakes once reached that much over speed). I’ve increased DERIVATIVE GAIN on the positive side but having a hard time finding a happy medium between this and jerking while going down a hill (passing set speed).

I’m still adjusting PIDs but better clarification or suggested relationships between PROPORTIONAL & INTEGRAL GAINS would be much appreciated.

JimKden
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Re: DBW Cruise Control

Postby JimKden » Tue Dec 25, 2018 1:57 am

This may offer some help to understand the relationships.

https://www.youtube.com/watch?v=wkfEZmsQqiA

ToyotaHubs
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Re: DBW Cruise Control

Postby ToyotaHubs » Wed Dec 26, 2018 1:58 pm

JimKden wrote:This may offer some help to understand the relationships.

https://www.youtube.com/watch?v=wkfEZmsQqiA

Thanks, that helps me understand what those three gains are and their relationships, I've adjusted out some of my problems almost immediately.

Problem I'm still having:
As vehicle slows while overcoming a large hill the throttle % goes up considerably in an attempt to reach set speed. If set speed has not been reached before topping the hill, the vehicle will accelerate past the speed at the top and continue accelerating down the other side of the hill (not due to gravity but due to engine acceleration). If set speed has been reached before topping the hill then it doesn't accelerate on the downward slope.

Any links to PID setup troubleshooting steps would be appreciated, i.e. if you're having xxx problem, adjust xxx gain.

JimKden
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Re: DBW Cruise Control

Postby JimKden » Thu Dec 27, 2018 1:54 am

Here is another one with a more practical example. It is lengthy. It shouldn't matter that it's produced by a competitor because the concept is what you are after. I don't know enough about PID control to say which part to change.

https://www.youtube.com/watch?v=16Clfh5eBzg

There is a follow up video where the process of setting the PIDs is presented.

BlueReaperX
Posts: 27
Joined: Tue Jun 19, 2018 8:29 pm

Re: DBW Cruise Control

Postby BlueReaperX » Wed Jan 02, 2019 3:56 pm

I got cruise control working perfectly but I would like an indication when it's on. Unfortunately I'm out of inputs/outputs on both my haltech and I/O expander. Any chance I could get a notification or a "warning" on my IQ3 to show "Cruise On/Off"? I just want to know when it's on/off nothing fancy like speed set or anything.


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