Imac&c hch1 civic

[retepsnikrep]

I'm just finished a free demo version of this project for people to try before they decide to purchase the full version with all the bells and whistles.

The demo allows those who have built their own device using stripboard/proto board or even my pcb to load a version of the software for free to check it works.

The demo has one level of assist and regen only.
Approx 6A of regen and 12A of assist.

No battery protect mode.
No ABC overide.
No max assist/regen.
No disable assist/regen.
No autocancel.
No ima cruise control.
etc etc.

The attached zip file is not password protected and may be freely distributed.

[samwichse]

Yes, the zeroing out works well, it does the same behavior I've noted from the ECU before on certain random occasions: When you press the disable button, it suddenly jumps to a negative amperage like you're sitting at autostop and the engine isn't running at all, then the deficit slowly decreases over a few seconds until it zeros out.

I'd be curious to see voltage in real time on the 12v side and what exactly it does.

The shortened button presses for full regen/assist are coming it much more handy than the old 1 second ones.

Sam

[retepsnikrep]

Code improvements to do.

1) Implement assist/regen ramp for the assist/regen modes to avoid drivetrain stress.
The Jump to max assist with a good battery puts 90A into the drivetrain and is quite noticeable. It needs to ramp up over say 0.25-0.5 seconds.

2) Implement the cruise control mode for my A123 pack.

3) Implement Brake/Clutch cancel. (Need to gather data for that so may add an inline capture port to make plugging in my logic analyser a bit easier.)

Any other ideas from owners not covered in the new code?


I did 300 miles yesterday for about 65mpg average, weather pretty foul so not too bad.
No glitches with the IMAC&C system which was pleasing and the ABC cancel or prevent assist/regen whatever you want to call it works really well.
That can really help an old battery

[Aqua]

300 miles, that a journey, the car ship shape. good news,
Here something even as mine coming next week,
Pete, straight to the point, what would you think about using that cancel open button long press for a full Manuel assist mode over riding stock assist?* possible?
beside parking lots and park drive through using E.V. last comes *continue city stop lights,*
*All is needed for a cvt *is a fast helping manuel asist 1-2 up click and then stock assist turned off. The ice can handle the rest. Till it's lithium time.
as**1 gear is about *9-12 mpg for a few secound, then it's shift to 40 mpg. what I hate is The stock setting continue to bleed of soc as long as you touch the trottle.*(wasted limited capacity) and assist for me isnt needed for gaining speed for coasting. I know you *can't be using E.V alone at a stoplight over and over or you empty the pack or heat up the pack trying to *Regen back *that fast.
Useing The battery saver mode limit stock assist only on the assist side. Something but it's still a lower bleed. *i could do *this over and over. assist 1-2-3 /hit *cancel /hit Regen once *on / hit Regen again off, for next stop light. another note I *sure love that nice touch of Regen 1 click to over ride and saving your SOC.as the stock setting would gladly have this extra for lunch.
Sound like you had fun.

[retepsnikrep]

Unfortunately Aqua the Cancel long press is reserved for my Cruise control mode.

You can already use manual assist/regen mode from standstill if you set AutoCancel to off. Medium press of Cancel button.

Once you get yours installed and have had a while to get used to it we can think again.

[Aqua]

I would worry too much about the drive train Slack /jolt,
I as a driver would meet or lessen that added torque, a E.M puts out max torque in the first revolution. ( its also start in 1/4 revolution ) Meaning, to load the drive train first, leaving hard in a stoplight tap the trottle just before the next up click so the weight has started to shift forward and the EV doesnt have to get the weight moving but pulling, (when I build torque I found out that because there mated, as I build torque the EM feel stronger, its because its doesnt have to get the weight moving the torque did already, so just have to follow through the movement so its comes on like a turbo and pull harder adding to what improvements done to the ice ) on expressly the 100% assist get it moving first, the lower speed you use it,without moving the mass you could break something eternally, torque break parts, don't used it coming out of a drive way slight turn. I did break a rear end as one wheel spinds faster than the other then.
I should get another diffrent adaption to my cvt.

[retepsnikrep]

Well I have added some skeleton code for the IMA cruise control mode.
Won't get a chance to try it for several days though.

Cruise is activated by a long press on the Cancel button.
The initial target/cruise speed is the speed the vehicle is moving when you active it.

Cruise mode changes the function of the assist/regen buttons.
Up Button short click increases Cruise target speed by one unit.
Down Button short click decreases Cruise target speed by one unit.
Cruise mode can be cancelled by a short click of the cancel button.

Cruise mode ramps assist up and down to maintain the target speed.
Cruise mode can also operate with the battery protect assist limit.

Cruise does not use regen to control over speed, you are better off just letting your foot off the throttle.
I might add regen if it proves necessary.

Also added some code to change the way the led works.

Red Led ON Constantly = Assist 100%
Red Led ON 3/4 of a second per second = Assist 75%
Red Led ON 1/2 of a second per second = Assist 50%
Red Led ON 1/4 of a second per second = Assist 25%
Led OFF IMAC&C Inactive
Green Led ON 1/10 of a second per second = ABC Mode
Green Led ON 1/4 of a second per second = Regen 25%
Green Led ON 1/2 of a second per second = Regen 50%
Green Led ON 3/4 of a second per second = Regen 75%
Green Led ON Constantly = Regen 100%

Fast Flashing Red/Green Led = Cruise Mode

[retepsnikrep]

For anyone who wants to give their battery a workout.

Changes in this version.

1) IMA Cruise Control Mode added. Works quite well.
2) Led now flashes to indicate type and level of manual assist/regen/abc.
3) Internal code optimisations.

Note at the moment Cruise mode does not allow any regen, even on overun when injectors / valves closed or when braking.
To enable regen you have to cancel Cruise mode.
When in Cruise mode and assist is not reqd to maintain speed, the IMAC&C goes into ABC IMA load balancing mode.

I found it can also operate in IMA battery mode to supply all the car 12v loads, which reduces the load on the engine even further.
Only those with a bigger pack will benefit from that as any loads on the 12v side translate into additional drain on the main pack rather than them being balanced out by the IMA as would normally be the case for a net 0.00 IMA battery current flow.

Instructions as per prev post.

[samwichse]

I'm going to download this... and have a flat battery after about 1.5 miles .

I like the idea of the flashing led as an indicator of the amount of assist/regen... currently I have to keep an eye on the C&C to see what's going on (or try and remember how many times I've clicked).

Sam

[retepsnikrep]

The led flashing duration etc can be fine tuned to give the most intuative visual indication.
There is still a bit of work to do on this. So comments on that welcome.

I may not have choosen the best scheme. In fact it might be better to have a faster 0.5 second cycle and during that time we flash the led accordingly.

Example

If assist level is at 25% flash red led once during that period.
if assist level is at 50% flash it twice during that period
if assist level is at 75% flash it three times during that period.
if assist level is at 100% flash it four times during that period or have it on constantly.

vice versa for regen with green led.

The main program loop executes at a mandatory and fixed 30 times a second.

Each loop takes ~ 33.3ms, so that is the minimum led flash length we have to work with.
Flash length can be multiples of this, as can gaps between flashes. This is what the latest version does.
Other ideas welcome based on the above restrictions.

We have only used 50% of the code space in the pic so far.