Search found 11 matches
- Thu Jul 04, 2019 1:08 pm
- Forum: Dev: Software
- Topic: launch control
- Replies: 100
- Views: 101414
Re: launch control
Well, it turns out that stm32f4discovery board already have accelerometer on it! :D So, here is even simpler design, it require some empirical data, though. Go some weekend at the drag strip and do some launches. Log the accelerometer stream. Then choose the best result you have. After that, launch ...
- Thu Jul 04, 2019 8:31 am
- Forum: Dev: Software
- Topic: launch control
- Replies: 100
- Views: 101414
Re: launch control
2b requires extra sensors, external to the ECU. The "right" way to do it is by comparing the driven and undriven wheel speeds. This difference gives the amount of slip at the driven tires, which is then controlled by twiddling the power output of the engine up or down. Too much slip -> re...
- Thu Jul 04, 2019 8:21 am
- Forum: Dev: Software
- Topic: launch control
- Replies: 100
- Views: 101414
Re: launch control
The perfect launch occurs not where you are at max power, but on max torque. I'd like to make a clarification here: This is not how you get an ideal launch. The ideal launch is when you ride the peak of the slip % vs. grip curve for your tire for as long as possible. If I tried to launch at peak to...
- Wed Jul 03, 2019 6:26 pm
- Forum: Dev: Hardware
- Topic: VR board
- Replies: 51
- Views: 38989
- Wed Jul 03, 2019 6:23 pm
- Forum: Dev: Software
- Topic: launch control
- Replies: 100
- Views: 101414
Re: launch control
Not sure if useful, but here is my 5 kopeek. :) The perfect launch occurs not where you are at max power, but on max torque. Which, in most engines, occurs around 4-4500 rpm. So the driver's goal is to work with the gas pedal in order to keep engine revving around it's max torque rpms. If you ever p...
- Wed Jul 03, 2019 5:46 pm
- Forum: Dev: Hardware
- Topic: VR board
- Replies: 51
- Views: 38989
Re: VR board
I remember making such thing based on analog comparator with hysteresis. It was quite universal, worked with hall sensors as well.
- Thu Jun 27, 2019 9:01 am
- Forum: Dev: Hardware
- Topic: DEAD DESIGN rusEfi own wide band controller board add-on using CJ125
- Replies: 364
- Views: 345524
Re: rusEfi own wide band controller board add-on using CJ125
Thank you very much, guys!
- Wed Jun 26, 2019 11:59 am
- Forum: Dev: Hardware
- Topic: DEAD DESIGN rusEfi own wide band controller board add-on using CJ125
- Replies: 364
- Views: 345524
Re: rusEfi own wide band controller board add-on using CJ125
R4 is not the calibration resistor. The calibration resistor is INSIDE the lsu4.9 connector, hence why there are 5 wires from connector to sensor, but 6 pins in the connector. There are some docs here about the cj125 and LSU4.9 if you want to read more: https://github.com/rusefi/rusefi/tree/master/...
- Mon Jun 24, 2019 11:33 am
- Forum: Dev: Hardware
- Topic: DEAD DESIGN rusEfi own wide band controller board add-on using CJ125
- Replies: 364
- Views: 345524
Re: rusEfi own wide band controller board add-on using CJ125
I'm asking about this resistor, what is its function?
- Sun Jun 23, 2019 8:44 am
- Forum: Dev: Hardware
- Topic: DEAD DESIGN rusEfi own wide band controller board add-on using CJ125
- Replies: 364
- Views: 345524
Re: rusEfi own wide band controller board add-on using CJ125
OK, why is that external resistor, then?JRD McLAREN wrote: ↑Sat Jun 22, 2019 1:57 amEvery one LSU sensor have they own unique calibration resistor ...Реконструктор wrote: ↑Fri Jun 21, 2019 1:16 pmThe sensors I have does not have that wire, since the calibration resistor, which is slider-type, is inside the connector, and it is factory soldered at 62 ohms.
- Fri Jun 21, 2019 1:16 pm
- Forum: Dev: Hardware
- Topic: DEAD DESIGN rusEfi own wide band controller board add-on using CJ125
- Replies: 364
- Views: 345524
Re: rusEfi own wide band controller board add-on using CJ125
Hi all. This is my first post in this forum. :) My goal is to build atMega and CJ125 based stand-alone controller for WBO probe. I had collected several reference schematics across the net, including the one from rusEfi repository. All of them shows the Rcal wire (the green one) is connected to the ...