Toyota Powered VL Calais

[vlad01]

it takes a fair bit to make a V6 knock, not too sure about L67 though. Shitty fuel will do it though. aka 91 horse piss

[immortality]

Still adding a few things to 11P and playing with the tune. One of the recent things was to try and soften the light throttle shifts and speed up the high load shift. Softening was easy, just change the code/cal so the PCM can use the force motor output for the Toyota accumulator back pressure solenoid. Speeding up the luxury barge gearbox was trickier, other than getting a modified valve body. So added some multi stage torque management code. It now detects the shift and can adjust the timing in 3 stages during the shift. At WOT it has cut over half a second off the shift time. This is a light throttle shift that actually softens things up as the engine loses torque during the shift....

torque.png

The aqua spark advance shows the 3 stages, stage one starts at a configurable time after the shift is commanded by the PCM, it ends when the RPM begins to drop, stage 2 and 3 are also configurable times. Also does fuel and/or spark cut during the middle of the shift in stage 2


And last week decided it was time to get stuck in to the spark. So built up this board that has been sitting waiting for over 2 years

600_6603.JPG

It uses the same filter chip as the festy knock board (which I had been using). I wanted to experiment with knock windowing and variable thresholds/gains with respect to RPM. The board gets the RPM signal from the EST (PCM spark output to the ignition module) and monitors when it goes low to fire the spark plug. Threw some code together for the AVR, and an XDF for making adjustments with this...

XDF.png

Can set the RPM break points to suit the engine, adjust the gain for the sensor, the INT is an integrator time constant, wait is in crank degrees from the EST fall and defines the window start, window is the sample period in crank degrees when the knock module is checking the sensor and threshold is the voltage output of the knock filter chip.

After some changes to the knock settings I think it is working ok. Top monitor is the ECU, RPM in red and knock counts in dark blue. Bottom is the knock module, red is the threshold, green is the sensor output after processing and blue when knock is sent to the PCM ...

ECU and Module.png

Have puled some more spark out and will see how things go tomorrow.

What knock sensor do you use with your knock board?

[VL400]

Currently using the standard Toyota resonant sensor, but will be changing to a flat response Bosch style soon to see the difference.

[VL400]

So Holden202T sent me a new toy to play with, an accelerometer! Its one of these http://www.hobbytronics.co.uk/adxl335-breakout and looks like this installed...

Installed.jpg (205.48 KiB) Viewed 5282 times

Slight mod of the firmware and ADX so 2 spare analog inputs inside the logger also get shoved in to the data stream (not logging the Z axis yet). And then this happens, hours of fun...
[youtube]https://www.youtube.com/watch?v=WYLxURvMn_Y[/youtube]


First lap of the block just to check things are ok. Medium braking and light accel, followed by a couple of left hand bends...

Should be a very handy addition to the logger Time to get some more data.

[vlad01]

sweet as! that will be very handy!

[yoda69]

Very cool.
I use Garmin 18x gps sensors at work, these output on serial data using NMEA0183 standard.
Find a way of adding that and you'd have a fairly fully featured track data recorder.
http://static.garmincdn.com/pumac/GPS_1 ... _Specs.pdf
These typically only output at 1hz but some can be setup to 5 Hz, not as good as the Vbox at 100hz, but good enough to map out a track in most cases.

[Holden202T]

I love the descriptions on the monitor VL400!

how this came about was an episode I saw on mythbusters crash testing cars, that got me wondering how much these sensors are and what sort of output they had.

turns out they were about $4 each and 0-5v output made them perfect for logging!

I plan to fit one to the Gemini to log drag racing launches, mostly just cause I can

[VL400]

Very cool.
I use Garmin 18x gps sensors at work, these output on serial data using NMEA0183 standard.
Find a way of adding that and you'd have a fairly fully featured track data recorder.
http://static.garmincdn.com/pumac/GPS_1 ... _Specs.pdf
These typically only output at 1hz but some can be setup to 5 Hz, not as good as the Vbox at 100hz, but good enough to map out a track in most cases.

I have also been looking in to adding GPS, really the only thing stopping it is how to display the data. TunerPro does not really allow for it, needs a google maps plugin! Would certainly be useful for track work, even road tuning its often useful to know where you were driving when looking at data.

[VL400]

I love the descriptions on the monitor VL400!

Without an XY display its about the best I could come up with in TP. And without the text I will forget my lefts from rights, and forwards from backwards.

[Jayme]

you could export the tunerpro log to CSV and import that into a mapping program? bit of a pain tho. be good to see all the engine data with a track map next to it when stepping through the data.