80 amps, and it's designed to be permanently connected directly to the battery anyway
Volvo electric power steering pump CAN bus control
Re: Volvo electric power steering pump CAN bus control
@Matthew: Awesome work! Congratulation!
Is there more info about this pump? Pressure for example...
Thank you.
Is there more info about this pump? Pressure for example...
Thank you.
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- running engine in first post
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- Joined: Mon Jan 30, 2017 2:05 am
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Re: Volvo electric power steering pump CAN bus control
They aren't pressure regulated unless you give it a large volume demand, same as an engine driven pump. The spool valve in the rack normally passes fluid freely, so the pump is moving a large volume at low pressure. If you provide enough resistance to raise the pressure up to the pressure of the bypass valve in the pump, then it is pressure regulated. I think the bypass is at 1100 psi/75 bar or something. During normal steering I never hit the pressure bypass valve unless I hit the stop on the rack.
As far as I can tell, the "speed" limit set over CAN is in fact a current limit on the motor to impose an imaginary "pressure limit" (positive displacement pump so torque ~= pressure).
Re: Volvo electric power steering pump CAN bus control
Hello Matthew,
thank you for the explanation. A colleague of mine is looking for an electric pump, as a replacement for the servo pump in the 8-series. Our servo pump has a maximum pressure of 120bar. The closest pump we know of is the one from a Mini with 105bar. It is not regulated, knows only on and off.
thank you for the explanation. A colleague of mine is looking for an electric pump, as a replacement for the servo pump in the 8-series. Our servo pump has a maximum pressure of 120bar. The closest pump we know of is the one from a Mini with 105bar. It is not regulated, knows only on and off.
Re: Volvo electric power steering pump CAN bus control
02-05 Mini pumps are not on/off if supplied with LIN data. Working on that slowly. Recommend joining slack.Zeiss wrote: ↑Tue Aug 09, 2022 4:51 pmHello Matthew,
thank you for the explanation. A colleague of mine is looking for an electric pump, as a replacement for the servo pump in the 8-series. Our servo pump has a maximum pressure of 120bar. The closest pump we know of is the one from a Mini with 105bar. It is not regulated, knows only on and off.
"Dave B. 5:03 PM
Mark is an ass but by far the most potent combination of knowledgeable ass, smart ass, get it done ass and determined ass. and his ass consistently puts in time."
-Dave B, Hero, Tuner, and probably has a car.
Mark is an ass but by far the most potent combination of knowledgeable ass, smart ass, get it done ass and determined ass. and his ass consistently puts in time."
-Dave B, Hero, Tuner, and probably has a car.
Re: Volvo electric power steering pump CAN bus control
Here you can see the wiring diagram of an 10/2004 Mini Cooper S Convertible:
There is no LIN connected to it.
And here is the picture of the pump:
There is no LIN connected to it.
And here is the picture of the pump:
Re: Volvo electric power steering pump CAN bus control
What your diagram isn't showing you, is that the line going to alternator is also going to the ECU. It's linbus. Matt and I figured this out last week. Lin bus control for both pump and alternator.
I'll personally be getting and testing that pump within a month, as I am selling universal EPAS controllers."Dave B. 5:03 PM
Mark is an ass but by far the most potent combination of knowledgeable ass, smart ass, get it done ass and determined ass. and his ass consistently puts in time."
-Dave B, Hero, Tuner, and probably has a car.
Mark is an ass but by far the most potent combination of knowledgeable ass, smart ass, get it done ass and determined ass. and his ass consistently puts in time."
-Dave B, Hero, Tuner, and probably has a car.
Re: Volvo electric power steering pump CAN bus control
As per Andrey's permission, I now have a solution for running many different types of Steering Assist systems, with a wide variety of modes and functions.
https://www.nmstec.ca/product/psc/
https://www.nmstec.ca/product/psc/
"Dave B. 5:03 PM
Mark is an ass but by far the most potent combination of knowledgeable ass, smart ass, get it done ass and determined ass. and his ass consistently puts in time."
-Dave B, Hero, Tuner, and probably has a car.
Mark is an ass but by far the most potent combination of knowledgeable ass, smart ass, get it done ass and determined ass. and his ass consistently puts in time."
-Dave B, Hero, Tuner, and probably has a car.