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JRD McLAREN wrote: ↑

Wed Apr 13, 2022 6:54 pm

..and two outs are planed for 0-5V OUT and 0-1V OUT
a.k.a. Lambda out .. ??- 1Volt = Lambda 1 (0.85V = 0.85Lam)
..or Narowband output ..?

Both outputs are capable to output in 0..5V range.
You can define any output voltage vs AFR curve.
Currently no curve defined

joaodh wrote: ↑

Wed Apr 13, 2022 1:31 pm

I have checked the schematic, and I see that there is a lot of changes compared with f042 board.

Why not keep both boards similar into the LSU controller circuit?

We want to support LSU4.2 and ADV also.
We planing to add some SW diagnostic.
So some changes were added to support these.

Updated F103 wideband. Reviewers are welcomed.

That's for reverse protection without the drop of a diode. The body diode on Q1 "kick starts" the circuit that pulls its gate low, turning it on fully. edit: the D4 TVS is for overvoltage protection Thanks for clarifying. This rises two new questions :) 1. Do we need to pass +12 for heate...

Drain and Source should be swapped? Or it is not an overvoltage protection? Just a reverse-protection?

This one? https://aliexpress.com/item/4001011611832.html

AndreyB wrote: ↑

Tue Apr 05, 2022 3:21 am

Practically speaking right now rusEFI needs 4.2 more than in needs LSU ADV (4.2 is needed to make hellen121vag happier)

BTW, I have brand new unused LSU4.2. And mate connector.

mck1117 wrote: ↑

Thu Mar 31, 2022 2:33 am

@Dron_Gus will be interested to see this somewhat unconventional use of his gpiochips api : https://github.com/rusefi/rusefi/pull/4029

Cool. Can I change "senior software engineer" on my business card to "software architect"?

OpAmp stability due to capacitive load? exactly But if feedback is connected to right side of R9, do we still need C4/such a big C4? I'm thinking about adding protection to all inputs/outputs. Currently Vm output will survive short to ground, but not short to +12V. Increasing R9 and adding protecti...

Yes, subtracting that part out is the right thing. Rise time of a 10 ohm / 1uF filter is on the order of 25 microseconds, but the AC is at ~3khz, which is a period if 330 microseconds. Since we do our math (not sampling) just after flipping the pin (waiting for switching noise), we catch very very ...

mck1117 , Are use sure that R9 make sense when calculating Ri? As it is measured using quite high freq AC and there is C4... Screenshot from 2022-03-30 00-59-07.png // There is a resistor between the opamp and Vm sensor pin. Remove the effect of that // resistor so that the remainder is only the ES...

Maybe a bit premature, but... Does the f103 have enough pins left to do a dual sensor setup? Have we determined if it has the processing power? I can work on the schematic and pcb layout of it's feasible. I would think some consolidation could be done as well. Currently each sensor uses 3 ADC chann...

Ok. A was able to warm up LSU4.9 with this board and a bit modified FW. Heater reached closed loop and stay at 0.6 duty @ 12V at open air. A have added another circuit to measure Ri using AC decoupled opamp with K = 11. Gain is too high and there is still different with Ri measured using diff amp. W...

And if you don't believe me, solve for how much temperature error you'd get in the worst case if all your resistors were "worst case" edge of their tolerances. Hint: it's inconsequentially small.i I believe you! Now, with Ri vs T I can do it for all temperatures. But I will not do it. Las...

By the way, this is very very similar to how the CJ125 works internally. It uses some sample+hold stages (AND ANOTHER DIFFERENTIAL AMPLIFIER) synchronized to the AC injection instead of an ADC, but it works fundamentally the same as this circuit. Yes, but. ;) It uses external Rical to calibrate thi...

The DC component is required. That's how we get feedback for the pump controller. AC measures temperature (ESR), DC provides feedback to the pump cell controller. Review the theory of the sensor here: https://rusefi.com/forum/viewtopic.php?p=38282#p38282 I mean, DC can be used without amplification...

The nernst sense is used for two things: The DC component is used as feedback for the pump controller. The pump is servoed to maintain 0.45v DC on the Nernst cell. The AC component is used for internal resistance measurement of the sensor, which is a proxy for temperature (the sensor is roughly an ...

Ok. I faced with some issue. I'm debuging Nerst Ri measurement circuit. I started with connecting a test 100R resistor between LSU_Un and LSU_Vm. I was expecting to see 100R measured Ri. But sow 5 Ohm. On LSU_Um I see 1.64V of DC and 20mV of AC. Calculation shows me 110 of Ri. Looks correct. Screens...

stayros32001 wrote: ↑

Thu Mar 10, 2022 10:01 pm

Do you think that converting the vss or vr crank to hall, will work?

We just add small board with NCV1124 to convert VR signal to logic and input to second trigger input https://rusefi.com/forum/viewtopic.php?f=2&t=2023

Yep, that's tight in space. If you place it where the battery is now how are you going to route the downpipe and the rest of the exhaust? Unless you go full mad max and just put a straight pipe through a hole in the fender. In that case you can also mount it low on either side of the radiator and u...

AndreyB wrote: ↑

Sat Feb 26, 2022 6:53 pm

which raises the question of what info has confused @MadGoatCustoms and what should be adjust where

I received no feedback. That makes me think/hope that no issue with MRE and stepper.

MRE hardware might support stepper but firmware might not. overall I am not sure if anyone in rusEFI is using stepper. We kind of have the code but we have very little priority for stepper - for us it's either solenoid or full ETB. Stepper is supported on MRE since https://rusefi.com/forum/viewtopi...

Yes. Pistons from EJ22NA. Seems EJ22 has another combustion chamber shape. Thats why its pistons has bigger pool. Rods are the same as on EJ20G, EJ20K and so on. AFAIR Subaru were using same rods for NA and turbo engines until late 1990x. No space at engine bay at all. Screenshot from 2022-02-26 01-...

MHTSOS wrote: ↑

Wed Feb 23, 2022 3:23 pm

8.4/1 compression ratio calls for big boost. Even 8.8/1 can do 250kpa on a stroker EJ20.

Suba maniacs say 1bar is safe for pistons and rods used in this motor.
Any suggestions on turbo?

Ok. Pistons were replaced with EJ22's +0.5 pistons - the only one available. This drops CR from 10.0 to about 8.4. That makes me start thinking about turbo. Few variants were suggested: TD05-20, G25-550 and G30-770. Borg's EFR is too progressive and expensive for this 90's engine. IMG-20220222-WA000...

Few ideas from Ru.

CANable Z PRO was tested with MRE. Still under Linux only.
Windows testers are welcome.
See https://github.com/rusefi/rusefi/issues/3483

Oof, that's not great. Why'd it happen? How many km on the engine? 200ooo km. Mechanic says due to overheat. Seems by previous owner. I did only about 2000 km on this car and never see high temp on coolant gauges. Radiator already has plastic top replaced with welded aluminum. This is known issue f...

Not an RusEFI issue

Dron_Gus wrote: ↑

Tue Jan 25, 2022 7:26 pm

If external source for these inputs can be affected by 100..300uA of diagnostic current - then DFB* lines should be cut.