Boost Control Settings, 250Hz possible?

Testing and development of Megasquirt 3

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Turbolu
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Location: Wiesbaden Germany

Boost Control Settings, 250Hz possible?

Post by Turbolu »

Hello together,

I have a concern, I would like to operate an electric WG controller, this requires 250Hz.

I use an MS3 with the current firmware, in the Boost Control Settings I can only select "mid" "... 153Hz, 204Hz, 306Hz ...".

In the "Generic PWM Output" I can select 250Hz, so runs the controller. "Only" the map is smaller in the "Generic PWM output" and I can´t drive a CL control.

Does anyone have an idea how I get the problem solved?

Greets from Germany
VW Golf 2 4 Motion 2,1l 16v Turbo Tracktool

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Turbolu
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Re: Boost Control Settings, 250Hz possible?

Post by Turbolu »

Hello again,


Now the Engine runs, but the Porsche VTG Turbo needs 250Hz... It would by nice if can usw the boost table to use Closed Loop with the 250Hz

At worst case I must take an Arduino to confert 306Hz to 250Hz


Edit:

MS3 1.5.0 release
TS Ultra V3.0.28
VW Golf 2 4 Motion 2,1l 16v Turbo Tracktool

Porsche 911 VTG Turbo
MS3x
Vollsequ, 4x EGT
8x Injektor
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TurboBob
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Re: Boost Control Settings, 250Hz possible?

Post by TurboBob »

is this a solenoid you are trying to control, or an electric motor style actuator?

B
Turbolu
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Re: Boost Control Settings, 250Hz possible?

Post by Turbolu »

it is an Siemens E-Actuator (Original Porsche 997 Turbo)

If it is not possbile, i will take an Arduino to make 1021Hz to 255Hz
VW Golf 2 4 Motion 2,1l 16v Turbo Tracktool

Porsche 911 VTG Turbo
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Paul_VR6
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Re: Boost Control Settings, 250Hz possible?

Post by Paul_VR6 »

Have you tried 204 or 306? I have seen most devices work fine over a range of control frequencies.
-Paul
1992 Corrado SLC 3.6 VR6 11.38@120 - MS3 Pro Ultimate - Microsquirt I/O - Can EGT - Racepak IQ3s
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Turbolu
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Re: Boost Control Settings, 250Hz possible?

Post by Turbolu »

Hello Paul,

it only works at 243Hz-257Hz


Why it is possible to select 250Hz in the "generic PWM " and not in the Boost seetings?
VW Golf 2 4 Motion 2,1l 16v Turbo Tracktool

Porsche 911 VTG Turbo
MS3x
Vollsequ, 4x EGT
8x Injektor
CANbus Board
jsmcortina
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Re: Boost Control Settings, 250Hz possible?

Post by jsmcortina »

Turbolu wrote:Why it is possible to select 250Hz in the "generic PWM " and not in the Boost seetings?
Boost control is using hardware PWM which has a fixed set of frequencies depending on the dividers used. The list in MS3 isn't all of the possible frequencies though.

The generic PWM is using software PWM and can use a wider range but typically slower and less precise frequencies.

James
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Turbolu
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Re: Boost Control Settings, 250Hz possible?

Post by Turbolu »

James,

Can you help me ti fix the problem with 250Hz in the boost Control? :|

I don't like to use an Arduino, but i like to use my Porsche VTG turbo on my Golf 16v engine and have a good boost control :mrgreen:
VW Golf 2 4 Motion 2,1l 16v Turbo Tracktool

Porsche 911 VTG Turbo
MS3x
Vollsequ, 4x EGT
8x Injektor
CANbus Board
Turbolu
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Posts: 6
Joined: Mon Dec 19, 2016 5:48 am
Location: Wiesbaden Germany

Re: Boost Control Settings, 250Hz possible?

Post by Turbolu »

Hi,

now it runs :D


I took in the "Generic PWM B" for the Y Axis "Boost duty" and the "Boost control settings" I choose a "blind" output.
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VW Golf 2 4 Motion 2,1l 16v Turbo Tracktool

Porsche 911 VTG Turbo
MS3x
Vollsequ, 4x EGT
8x Injektor
CANbus Board
MWPau
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Re: Boost Control Settings, 250Hz possible?

Post by MWPau »

Nice work :)
Toyota Celica GT4/Alltrac with 5S-GTE stroker (2.2L I4 turbo, high CR) on E85 w/FlexFuel.
MS3 + MS3X + KnockBoard + RTC + BT + DIY CAN-IO-Board + DIY CAN Digital Dash.
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