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Author Topic: The Volvo ME7 thread:  (Read 1930391 times)
daniel2345
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« Reply #2460 on: January 02, 2024, 08:34:55 AM »

Yes, EPK is also a possibility.
Just checked them, four different EPK Strings.


Sure, minimum selector. Priority is probably the wrong word to describe Lambda selection correctly.
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« Reply #2461 on: January 02, 2024, 08:50:03 AM »

Yes, EPK is also a possibility.
Just checked them, four different EPK Strings.
Not really a "possibility", rather the only correct way to do this for ram logging.
There's a lot of software with the same EPK and it makes zero sense to have separate definitions for all of them.
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s60rawr
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« Reply #2462 on: January 02, 2024, 09:34:15 AM »

For US we got a final update 50GSHJ 05+ manual 05 auto which runs really good.
Works on 06-07 tf80 cars but no cruise control in 6th gear so we still use the wra72 wrhj variant for those.
Cross flashed many, never any issues
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s60rawr
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« Reply #2463 on: January 02, 2024, 09:42:38 AM »

05+ final update ( facelift and newer )
only seem to be US bins, how like QKHJ is US 2007 update for the pre facelift 04
he can try these, it is a US bin so he'd have to use an EU ESKONF and hopefully thats it just to test the BTS in the logs.
GPHJ lines up with it well, most of the addresses are close, i made a small pack for it.

enjoy
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prometey1982
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« Reply #2464 on: January 02, 2024, 10:21:04 AM »

For US we got a final update 50GSHJ 05+ manual 05 auto which runs really good.
Works on 06-07 tf80 cars but no cruise control in 6th gear so we still use the wra72 wrhj variant for those.
Cross flashed many, never any issues

You need to set GAFGRO (max. permitted gear during active cruise control) from 5 to 6. But anyway 50GPHJ works poor with TF80. Maybe 50GSHJ works but I didn't check it.
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s60rawr
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« Reply #2465 on: January 02, 2024, 10:27:24 AM »

You need to set GAFGRO (max. permitted gear during active cruise control) from 5 to 6. But anyway 50GPHJ works poor with TF80. Maybe 50GSHJ works but I didn't check it.

I tested a GPHJ auto bin on a tf80 and it ran great, just no cc in 6th.  this was before i had proper wrhj wra72 logging parm
thank you tho!
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prometey1982
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« Reply #2466 on: January 07, 2024, 03:56:56 AM »

One guy who have some posts here published the video with rolling antilag
https://www.youtube.com/watch?v=YymK3depr6c&t=1s

I want to implement such functionality but don't fully understand how it works. Possible implementation can be:
1. If cruise is disabled and cruise + button is pressed more that N seconds then
2. Save current speed to the variable
3. Push pedal to the metal and control current speed to saved by ignition angle retarding.
4. If it not enough then we can drop torque by cylinders injection disabling.
5. When cruise+ button is released then we disable previous mechanics.
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keichi
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« Reply #2467 on: January 07, 2024, 04:50:43 AM »

One guy who have some posts here published the video with rolling antilag
https://www.youtube.com/watch?v=YymK3depr6c&t=1s

I want to implement such functionality but don't fully understand how it works. Possible implementation can be:
1. If cruise is disabled and cruise + button is pressed more that N seconds then
2. Save current speed to the variable
3. Push pedal to the metal and control current speed to saved by ignition angle retarding.
4. If it not enough then we can drop torque by cylinders injection disabling.
5. When cruise+ button is released then we disable previous mechanics.

On video you posted there is actually no rolling anti-lag (just NLS) Smiley
But here is anti-lag and nls shown: https://www.youtube.com/watch?v=-tWZVR7kp8I

It's done more od less the way you described.

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« Reply #2468 on: January 07, 2024, 06:46:58 AM »

One guy who have some posts here published the video with rolling antilag
https://www.youtube.com/watch?v=YymK3depr6c&t=1s

I want to implement such functionality but don't fully understand how it works. Possible implementation can be:
1. If cruise is disabled and cruise + button is pressed more that N seconds then
2. Save current speed to the variable
3. Push pedal to the metal and control current speed to saved by ignition angle retarding.
4. If it not enough then we can drop torque by cylinders injection disabling.
5. When cruise+ button is released then we disable previous mechanics.

1. On trigger save current rpm.
2. Have a 3d map with latest safe ignition (to not create egt problem)
3. Have another map that sets redsol based on RPM delta.

If a lot of EGT issues set NMAX temporarily to current saved RPM, so it closes throttle a little too.
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« Reply #2469 on: January 07, 2024, 07:51:15 AM »

1. On trigger save current rpm.
2. Have a 3d map with latest safe ignition (to not create egt problem)
3. Have another map that sets redsol based on RPM delta.

If a lot of EGT issues set NMAX temporarily to current saved RPM, so it closes throttle a little too.
There will be a problem with automatic transmission. Because on full throttle gearbox will switch to lower possible gear. So I prefer to save speed not rpm.
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keichi
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« Reply #2470 on: January 07, 2024, 08:39:32 AM »

1. On trigger save current rpm.
2. Have a 3d map with latest safe ignition (to not create egt problem)
3. Have another map that sets redsol based on RPM delta.

If a lot of EGT issues set NMAX temporarily to current saved RPM, so it closes throttle a little too.

EGT with retarded ignition means something else then EGT at normal ignition.
The more advanced ignition the more heat is absorbed by cylinder walls, pistons and valves and less is dumped into exhaust.
When retarding ignition a lot of heat is dumped directly into exhaust and EGT probe sees more heat.

But if injection is disabled on some cylinders (with redsol) total amount of heat generated by combustion is less then normal
So I would not be worried too much about high EGT during anti-lag.

Of course although anti-lag produces less heat then normal this heat go to parts of the engine that it is not supposed to - to exhaust valves, manifold and turbine and cause a lot of stress on those.
But there is nothing that can be done about that. They just have to bear it Smiley

EGT can be misleading also when it goes down Smiley
When i tune cars, i start from "safe" ignition that give huge EGT then advance ignition and EGT go down.
But it doesn't mean engine is cooler but just less heat reach EGT probe and at the same time our pistons and cylinders are more heat stressed Smiley
« Last Edit: January 07, 2024, 08:57:46 AM by keichi » Logged
prj
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« Reply #2471 on: January 12, 2024, 02:33:42 PM »

There will be a problem with automatic transmission. Because on full throttle gearbox will switch to lower possible gear. So I prefer to save speed not rpm.
Then you can use speed, yes.
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prj
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« Reply #2472 on: January 12, 2024, 02:36:23 PM »

But if injection is disabled on some cylinders (with redsol) total amount of heat generated by combustion is less then normal
So I would not be worried too much about high EGT during anti-lag.
Keyword IF. If you don't do any cutting at all you will quickly melt shit. If you don't apply a proper rotating pattern, you will melt shit etc.

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When i tune cars, i start from "safe" ignition that give huge EGT then advance ignition and EGT go down.
But it doesn't mean engine is cooler but just less heat reach EGT probe and at the same time our pistons and cylinders are more heat stressed Smiley
I think you need to go back to school and re-learn the first and second laws of thermodynamics.
Of course it means that the combustion chamber is cooler. This might be the most stupid thing I've read on here in a long time.

The same amount of fuel burned produces the same amount of energy. It gets converted to kinetic energy that pushes the piston and to heat.
Ignition angle in an ICE is the efficiency of conversion to kinetic energy. Given the same charge in the cylinder less efficient combustion directly heats the combustion chamber.
Everything that is in the combustion chamber gets hotter, and also the exhaust gas gets hotter. The exhaust gas does not magically teleport to the EGT probe, it exits the combustion chamber. What you see on the runner or at the turbo is already at way lower temperatures than what is in the combustion chamber.
« Last Edit: January 12, 2024, 02:42:26 PM by prj » Logged

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keichi
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« Reply #2473 on: January 12, 2024, 03:42:39 PM »

Keyword IF. If you don't do any cutting at all you will quickly melt shit. If you don't apply a proper rotating pattern, you will melt shit etc.
I think you need to go back to school and re-learn the first and second laws of thermodynamics.
Of course it means that the combustion chamber is cooler. This might be the most stupid thing I've read on here in a long time.

The same amount of fuel burned produces the same amount of energy. It gets converted to kinetic energy that pushes the piston and to heat.
Ignition angle in an ICE is the efficiency of conversion to kinetic energy. Given the same charge in the cylinder less efficient combustion directly heats the combustion chamber.
Everything that is in the combustion chamber gets hotter, and also the exhaust gas gets hotter. The exhaust gas does not magically teleport to the EGT probe, it exits the combustion chamber. What you see on the runner or at the turbo is already at way lower temperatures than what is in the combustion chamber.

Well maybe master's degree at combustion engines theory is not enough (yeah i'v done such studies, very interesting and useless knowledge Smiley there is so little demand for combustion engines theorists that they closed this specialisation at my university few years later - just one guy found job in this specialization, he is designing diesel truck engines for one of big companies Smiley

But regarding engines and combustion Smiley i belive you are confusing concepts, no offense Smiley
There is no conversion of burned fuel into kinetic energy. Kinetic energy is related to velocity not thermal transformation.
Burning fuel is only needed to raise temperature of air in the combustion chamber.
When air in the combustion chamber get hotter according to 2nd rule of thermodynamic then pressure rises.
This pressure then push the piston.
Combustion is actually irrelevant for making power. There are external combustion piston engines like Stirling engine. All that matters is to heat up the medium (air) to rise the pressure.
There are even piston engines that do not need to heat up medium at all - they just use external source of pressure (pneumatic engines) that push pistons.

In internal combustion piston engine we burn fuel to heat up medium and rise pressure.
The earlier we ignite mixture the more time heat will have to penetrate pistons, cylinders and head. More of this heat will be absorbed by the engine.
If we retard ignition heat will have less time to be absorbed by the engine and more of it will be thrown out of the exhaust - that's wy EGT goes up when we retard ignition.


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prj
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« Reply #2474 on: January 12, 2024, 03:53:56 PM »

In internal combustion piston engine we burn fuel to heat up medium and rise pressure.
The earlier we ignite mixture the more time heat will have to penetrate pistons, cylinders and head. More of this heat will be absorbed by the engine.
If we retard ignition heat will have less time to be absorbed by the engine and more of it will be thrown out of the exhaust - that's wy EGT goes up when we retard ignition.
The more energy is spent pushing the piston, the less waste heat there is. First law of thermodynamics, such a difficult concept to grasp, I know.
Earlier timing causes higher PCP and more work extracted from the same amount of charge. It also causes a much shorter and faster burn. The time is important.

The charge is constant, you're not magically adding or removing energy by moving the ignition point.
You are simply controlling the amount that gets converted into motion and the amount exhausted as heat.

I really can't tell anymore if the problem is that your English is just bad or that you have some fundamental issues with concepts.
Quote
The earlier we ignite mixture the more time heat will have to penetrate pistons, cylinders and head. More of this heat will be absorbed by the engine.
In case this was true, then the lowest heat would be "absorbed" at ATDC ignition. Yet this will quickly melt the pistons and valves.
So no, in the context of heat transfer, there is much more total heat transferred to the combustion chamber, especially at the exhaust portion with retarded ignition.

Quote
There is no conversion of burned fuel into kinetic energy. Kinetic energy is related to velocity not thermal transformation.
Burning fuel is only needed to raise temperature of air in the combustion chamber.
When air in the combustion chamber get hotter according to 2nd rule of thermodynamic then pressure rises.
This pressure then push the piston.
Again, first law of thermodynamics. In the end, kinetic energy is extracted from oxidizing the fuel...
The fact that there is not a direct transformation is irrelevant. Yes, there is an adiabatic process in between, so what?
« Last Edit: January 12, 2024, 04:11:23 PM by prj » Logged

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