Search found 246 matches

by Rhinoman
Fri Dec 21, 2018 8:14 pm
Forum: Hardware
Topic: Frankenso - ECU shield compatible with OEM case / official
Replies: 520
Views: 113618

Re: Frankenso - ECU shield compatible with OEM case / official

Well then there is no point filtering at 1khz - you'll just get aliasing of out of band frequencies.
by Rhinoman
Fri Dec 21, 2018 1:12 pm
Forum: Hardware
Topic: Frankenso - ECU shield compatible with OEM case / official
Replies: 520
Views: 113618

Re: Frankenso - ECU shield compatible with OEM case / official

kb1gtt wrote:
Fri Dec 21, 2018 11:06 am
Do we need more than 1kHz? I'm tempted to update the schematic, and leave the components. Most automotive analog signals are much slower than 1kHz.
Whats the analogue sample rate?
by Rhinoman
Mon Nov 19, 2018 1:21 pm
Forum: Misc
Topic: $0.035 micro
Replies: 3
Views: 600

Re: $0.035 micro

Up to 5cents now. Limited peripherals and no analogue channels makes them less use than a lot of other 6-pin micros.
by Rhinoman
Sun Nov 18, 2018 12:35 pm
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

I've lost track if what you're trying to achieve. If your throttle body accepts a PWM input to give a position then it already has a controller so you don't need a control algorithm. Are you sure that you have the PWM frequency correct?
by Rhinoman
Wed Nov 14, 2018 8:32 am
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 301
Views: 23991

Re: CJ125 board

I just added the below to known_issues.txt, this functions as my reminder about what to look at when I get to look at these kinds of things. Keep the feedback coming, and thanks for the feedback that I've received. 14) Change LSU4.9 to 301 ohms, as noted here https://rusefi.com/forum/viewtopic.php?...
by Rhinoman
Tue Nov 13, 2018 10:38 am
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 301
Views: 23991

Re: CJ125 board

Hello everyone, I am making my CJ125 board. I am thinking of using LSU 4.9 probes for reasons of reliability and accuracy over time. But on the pdf document bosch cj125, I saw that for the 4.9, the resistance value must be 301 ohms, out on the schematic layout of the rusefi cj125, the overall value...
by Rhinoman
Mon Nov 12, 2018 8:08 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 301
Views: 23991

Re: CJ125 board

I plan to get my board up and running, is there a summary of what is needed to modify a r0.2 board?
by Rhinoman
Wed Oct 24, 2018 11:00 am
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

You need to define what you mean by 'running away', I would always expect anti-wind a motor PID-controller. The biggest problem with automotive motor controllers is the vulnerability to instability caused by transients on the supply voltage, IME that's usually dealt with by a voltage compensation mu...
by Rhinoman
Tue Oct 23, 2018 8:04 pm
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

2.4 ohms so low-z, even if it were high-z it would have to be PWM'd to control the speed, you won't make a position controller without a speed controller. I will measure the inductance and then I can determine the PWM frequency for the current controller.
by Rhinoman
Mon Oct 22, 2018 6:37 pm
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

It looks very much like this: https://patents.google.com/patent/US6173939 Checking with the multi-meter, the two pins nearest to the motor contacts are connected to those motor contacts so I have four pins for the encoder. The springs have a fair resistance to them so I would guess that the motor is...
by Rhinoman
Mon Oct 22, 2018 6:24 pm
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

I drilled the pop-rivets off the Mazda ETB and opened it up. Any electronics must be moulded into the top, I would guess that its all mounted on a lead frame inside the plastic. There is a magnetic encoder on the shaft for the butterfly and two contacts for the motor. It does confirm that its a Dens...
by Rhinoman
Mon Oct 22, 2018 9:50 am
Forum: Hardware
Topic: Ion Sense
Replies: 141
Views: 12751

Re: Ion Sense

Its usually 400V fly-back from the spark that's used to charge a cap to around 80V to power the ion sense circuit. The patents are on line somewhere.
by Rhinoman
Fri Oct 05, 2018 1:08 pm
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

If you can post that it would help, I'm not finding any info.
by Rhinoman
Wed Oct 03, 2018 2:25 pm
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

The ETB that I have is from a Mazda though it is a Ford unit, quite clearly marked FoMoCo. Have you get the pinout information for these?
by Rhinoman
Thu Sep 27, 2018 7:24 am
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

I suspect your loop timing is wrong. You can't really run a PID algorithm on a micro, its an analogue (s-domain) algorithm, on a micro you run a modified (z-domain) algorithm, in essence you have four inputs P,I,D and T where T is the loop time. There are a number of different methods to convert fro...
by Rhinoman
Mon Sep 24, 2018 6:07 pm
Forum: Software
Topic: electronic throttle body control ETB
Replies: 262
Views: 19997

Re: electronic throttle body control ETB

Have you got any feedback from the electronic throttle? if you have then you could plot the two and try some rapid openings and then see how well the electronic throttle follows (step response). Also try some rapid voltage variations to make sure it isn't going to go unstable when you get transients.
by Rhinoman
Tue Sep 18, 2018 9:33 pm
Forum: Misc
Topic: Piston coating
Replies: 16
Views: 2178

Re: Piston coating

There are lube additives containing teflon, slick50 is one, not quite sure how any of them would "stick" teflon to the metal of the engine, what with it being one of the most non-stick compounds we have... :lol: So that bit is probably bullshit. That SAE paper was from 1994 so it has been about in ...
by Rhinoman
Sat Sep 15, 2018 7:38 am
Forum: Misc
Topic: Piston coating
Replies: 16
Views: 2178

Re: Piston coating

Its OK in cooking pans as long as you don't use anything metal in them. I can't claim to do a lot of cooking but in my experience when its not a top quality pan it scratches quite easily and can peel.
by Rhinoman
Fri Sep 14, 2018 8:25 pm
Forum: Misc
Topic: Piston coating
Replies: 16
Views: 2178

Re: Piston coating

I recall Teflon coating as well. Theory being that it's a great dry lubricant, so it helps keep things from sticking to the top of the piston and prevents these ridges from poking thought the boundary layer. The results are colder crown temperature. DuPont, the inventors, have stated that Teflon is...
by Rhinoman
Mon Mar 19, 2018 7:50 pm
Forum: Hardware
Topic: Prometheus - NEW compact ECU shield!
Replies: 158
Views: 28835

Re: Prometheus - NEW compact ECU shield!

andreika wrote:
Mon Mar 19, 2018 10:53 am
When we're measuring the battery voltage, we don't need opamp, because source resistance is low. But we do need it when a high-impedance sensor is connected (including resistive ones like tps and thermistors).
You don't need an op-amp for TPS or thermistors, OEM ECUs don't use them.
by Rhinoman
Thu Feb 22, 2018 2:52 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 301
Views: 23991

Re: CJ125 board

The CJ125 uses the calibration resistor in the lambda sensor's connector so we shouldn't need to do any calibration.
by Rhinoman
Mon Jan 29, 2018 8:06 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 301
Views: 23991

Re: CJ125 board

I don't think that you need to delete those components - its a fairly high frequency filter and the constant current source will maintain the correct current, maybe leave the positions and fit a 0R resistor if not required. From what I recall they are shown in another document.
by Rhinoman
Thu Nov 09, 2017 1:46 pm
Forum: Hardware
Topic: 12 channel injector module - VNS14NV04
Replies: 12
Views: 4184

Re: 12 channel injector module - VNS14NV04

I have doubts about the choice of these FETs, the protection circuit cutting in is going to lift the gate voltage, the datasheet states 8V maximum. The drive voltage is labelled at 5V but as far as I can see its a 3V drive direct from the micro through a 20R resistor which gives (8-3)/20 = 250mA. It...
by Rhinoman
Wed Oct 25, 2017 12:19 pm
Forum: Hardware
Topic: Frankenso - ECU shield compatible with OEM case / official
Replies: 520
Views: 113618

Injector drivers

I'm still working away from home so I can't check this. I'm looking through the frankenso v0.42 schematic again and I can see that the injector drivers are driven by signal named inj_xx_5V. It appears that the signal comes directly from the processor which is 3.3V is it not?
by Rhinoman
Tue Aug 01, 2017 5:05 pm
Forum: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 126
Views: 35328

Re: analog inputs: op-amp + divider - Russian - now MCP6004

If its battery voltage then you need to ensure that the input pin voltage will be valid over the range of possible battery voltages. Also if you're not feeding into a schottky input then you will need to meet the minimum rise time requirement.
by Rhinoman
Fri Jun 30, 2017 11:03 am
Forum: Hardware
Topic: Injection timing using FPGA for Common Rail Diesel
Replies: 9
Views: 1202

Re: Injection timing using FPGA for Common Rail Diesel

You can do that with a general purpose MCU, 1us resolution is easy to achieve with a 32b timer running a 1Mhz. In theory you can go down to 23.8ns on the F405 when you run the timer at it's max frequency of 42Mhz. Yes my 1991 ECU achieves 1us resolution running a 6801 variant with a 1 MHz E clock d...
by Rhinoman
Mon Jun 19, 2017 12:59 pm
Forum: Misc
Topic: FPGA in ECU
Replies: 13
Views: 3217

Re: FPGA in ECU

I have done quite a bit of FPGA work on defence contracts. Its very unlikely you will see one in a production ECU because they are far too expensive, fortunately FPGAs aren't needed for EFI, modern processors are more than fast enough. I prefer VHDL to Verilog; neither VHDL nor Verilog should be con...
by Rhinoman
Mon Jun 19, 2017 12:29 pm
Forum: Software
Topic: idle IM_AUTO fixes and development.
Replies: 45
Views: 7058

Re: idle IM_AUTO fixes and development.

Which transform are you using to move from continuous time to discrete time?
by Rhinoman
Mon Jun 19, 2017 11:58 am
Forum: Your car & your engine
Topic: 2001 Citroen C5 HPi 2.0 HPI (Direct Injection)
Replies: 17
Views: 3919

Re: 2001 Citroen C5 HPi 2.0 HPI (Direct Injection)

You may find that at low battery voltages additional high voltage pulses are inserted to maintain a constant current; there can be quite complex strategies with HV injectors. Switching the injectors on the high and low side is standard practise for a low-z injector. The upper transistor is switched,...
by Rhinoman
Thu May 11, 2017 3:32 pm
Forum: Hardware
Topic: CAN bus: RX8 cluster
Replies: 25
Views: 4681

Re: CAN bus: RX8 cluster

can't get it what it means - high impedance, low impedance... but when you look at the transceiver pinout, you'll see that it is powered either from 5V or from 3V, which seemingly implies that this voltage levels could be found on the can bus. How does the transceiver sense the lines? Have you chec...