[1.30] Mercedes-Benz Drivetrain Revision

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rookie_one
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#231 Post by rookie_one » 25 Jun 2022 15:25

al_batros wrote: 25 Jun 2022 13:28
This basically replaces the clutch with an Allison-like "clutch", but without the torque-multiplier found in an Allison.
Actually, according to what I found, there is torque multiplication with the TRC in real life, ratio is supposed to be 1.58
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#232 Post by galimim » 25 Jun 2022 15:45

Do you have a source. I have that number for ZF boxes that use torque converter
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#233 Post by rookie_one » 25 Jun 2022 18:39

goddamn it, I mixed it up with the ZF TraXon
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#234 Post by galimim » 25 Jun 2022 19:24

I haven't found any data on VOITH torque converter multiplication. I guess it can be specified to some degree?
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#235 Post by al_batros » 25 Jun 2022 20:36

The PDF linked from this page https://voith.com/corp-en/braking-syste ... rucks.html called "Transmitting power efficiently | Turbo Retarder Clutch VIAB" does not talk about any kind of torque multiplication at all. (but it doesn't share any technical data, so ...)
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#236 Post by rookie_one » 26 Jun 2022 04:42

So we need someone to either annoy Voith or Mercedes-Benz in releasing the data
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#237 Post by StenioBlackHawnk » 26 Jun 2022 16:07

Ok, I'm having a headache trying to use this mod with Shumi MP4 and Kriech OM471 - 473 engine sound, I just don't get the sound from Kriech in my truck, do you guys know what I'm doing wrong? Thanks.
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#238 Post by eternite » 24 Apr 2023 18:08

Does anyone know which transmission should be used with the new actros (2019) ? I thought they only have 3 steps motor brakes.
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#239 Post by al_batros » 29 Apr 2023 16:38

eternite wrote: 24 Apr 2023 18:08 Does anyone know which transmission should be used with the new actros (2019) ? I thought they only have 3 steps motor brakes.
You could try the online configurator on the toc.mercedes-benz-trucks.com website ;-)
When configuring an Actros truck with the 510HP OM471 Gen 3 Engine, it offers the G280-16 (11.7-0.69), G281-12 (14.93-1.0) and the G330-12 (11.63-0,77) transmissions plus various differential ratios (2.278, 2.412, 2.533, 2.733, 2.929, 3.154, 3.714, 4.143, 4.333, 4.571, 4.833).
There are two versions of the engine brake: "standard" with three steps, up to 375kw with OM471@2300rpm, Step 1 on 3 cylinders, steps 2+3 on all 6 cylinders.
and "High performance engine brake" based on "Jake Brake" with OM471 Gen3 up to 425kw @2300rpm, again with 3 steps.
Edit/Update: The optional retarder has 5 steps (20,40,60,80,100%) and combines engine brake and retarder.
So I assume: Just engine brake: 3 steps, when you combine retarder and engine brake, you get 5 steps.
Hope this helps.
Last edited by al_batros on 29 Apr 2023 17:20, edited 1 time in total.
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Re: [1.28] Mercedes-Benz Drivetrain Revision

#240 Post by al_batros » 29 Apr 2023 16:44

@galimim, @rookie_one I did another google round on the Turbo Retarder Clutch.
This article: https://www.trucksales.com.au/editorial ... ed-138974/ :
The turbo retarder clutch has full utilisation of engine power up to the vehicle traction limit, and there is no additional load on the powertrain since there is no increase of the engine's high torque through the converter. Consequently, this means load-free engine acceleration through the defined engine rev range, with torque then maintained at a constant level.
(underlining added)
-> Would this imply a stall_torque_ratio of 1.0?
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