Nissan Primera P11 1998, SR20VE

[Sergey89]

Nissan Primera P11 with swapped SR20VE engine from Nissan Primera P12 20V. Naturally aspirated engine with the VVL (variable valve lift) technology at intake and exhaust camshafts. It also has a coil on plug ignition system. It produces 204 hp at 7200 rpm.

[Sergey89]

About the sensors and actuators used in the car.

CAS or CMPS (Camshaft Position Sensor) is used instead of crankshaft position sensor. It generates a 1 degre position signal and a reference signal. It has open collector outputs.



Output waveforms (with a distributor wheel):



Engine coolant temperature sensor
NTC type



Throttle position sensor
From ~0.5v at fully closed to ~4v at fully opened.



Idle air control valve.
PWM valve. f = 156.8 Hz, R = 10 Ohm



Ignition coil
With logic level inputs (not tested).



Variable valve lift solenoid
R = ~10 Ohm

[AndreyB]

I have a wheel really close to yours in my collection - see attach

Do you have one reference signal per revolution or four reference signals - like a wider one and three smaller?

[Sergey89]

Presented signals from the distributor wheel. This wheel looks like the COP wheel but with a different reference signal pattern.

[Sergey89]

The idle valve is simply controlled with a PWM signal.

[denisvak]

О, у меня аналогичный мотор...

[Sergey89]

Видел твою тему на нисмо клубе

[Sergey89]

SR20DE first run on STM32F4 based ECU.

[AndreyB]

SR20DE first run on STM32F4 based ECU.

That's a big day! Congratulations!

Now that you have the hardware, we need to migrate you to the rusEfi software

PS: need some pics of the hardware

[Mad Max]

Segrey89, does it run on Rusefi with ignition control?

[AndreyB]

Segrey89, does it run on Rusefi with ignition control?

No, this is @'s own software. Please join me in my attempts to convince him to merge these two independent source codes... i think if eveyone PMs him, he will break

[Sergey89]

Hardware. Left to right: triggers intreface, analog interface, actuators driver, injectors and igntion driver.

[AndreyB]

In Soviet Russia, you mount prototype boards to a 2 by 4...

[Sergey89]

Camshaft position sensor signal waveform in the OLS file format (http://www.lxtreme.nl/ols/).

[AndreyB]

Is that noise or signal on the upper channel?

[Sergey89]

noise

[puff]

hm. what's the origin of that noise and how do you usually get rid of it? I see noise on both channels, btw. what's the physics behind of these two sensors?

[Sergey89]

It is a pair of optical sensors with open collector outputs. I do not know the cause of the noise. Maybe a bad ground.

[AndreyB]

Is that with stock ECU, your own ECU or Frankenstein board? I wonder if I should be concerned or not

[Sergey89]

Stock. Do not take this as a sensor noise. It's just the noise of the logic analyzer. Similar pulses are present on all channel.

[puff]

such small slots on the outer diameter allow for better resolution? I wonder if that is necessary at all… Besides, what happens if they are contaminated with sludge and stop passing the light?

[Sergey89]

Position signal provides a 1 degree resolution. http://patentimages.storage.googleapis.com/pdfs/USRE34257.pdf

The case is sealed.

[puff]

United States patent for a Japanese car? Decent resolution, and it doesn't need any crank sensors, I guess. Is it mounted outside the engine?

[Sergey89]

138013100300.jpg (82.16 KiB) Viewed 23493 times

[AndreyB]

Nice, we know the widths. I wonder if the centers are at 0, 90, 180 and 270?

By the way trigger decoder definition angle runs from zero to 720, so the widths would be 16, 32, 48.

[Sergey89]

As far as i know the rising edges of the reference pulses are positioned at 110 degrees before TDC. The width of the pulses is 32, 24, 16, 8. But really the rising edges of the reference signal are placed between the rising and falling edges of the position signal. So it's more like 31, 23, 15, 7.