Bosch idle Valve Stepper

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chris_crack
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Bosch idle Valve Stepper

Post by chris_crack »

hi,
how do i have to setup the idle valve?
which frequency should i choose?

thx and greets from munich
Chris
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Matt Cramer
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Re: Bosch idle Valve Stepper

Post by Matt Cramer »

Stepper valves do not have a frequency. You would adjust the step size so that it is high enough the valve does not stick, but setting it too high will make it turn slowly. You will need to test this number for yourself.
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chris_crack
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Re: Bosch idle Valve Stepper

Post by chris_crack »

i heard 100hz would be a good value?
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Matt Cramer
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Re: Bosch idle Valve Stepper

Post by Matt Cramer »

First, you will need to determine if the valve is, in fact, a stepper. PWM valves use a frequency and have 2 or 3 wires; stepper valves do not and have 4 to 6 wires.
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chris_crack
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Re: Bosch idle Valve Stepper

Post by chris_crack »

its the 2 wire version
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Matt Cramer
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Re: Bosch idle Valve Stepper

Post by Matt Cramer »

Ok, that's not a stepper. Start with around 100 Hz.
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chris_crack
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Re: Bosch idle Valve Stepper

Post by chris_crack »

thanks :)
that means 100hz will keep the idle open? less will reduce the fow diameter?
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DonTZ125
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Re: Bosch idle Valve Stepper

Post by DonTZ125 »

The frequency is constant. The valve position is determined by the pulse width - thus, pulse width modulation.
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chris_crack
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Re: Bosch idle Valve Stepper

Post by chris_crack »

oh, of course!
im sorry :D
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