[Diy_efi] Re: Diy_efi digest, Vol 1 #231 - 12 msgs

[Mike]

Yeah thats what I'm aiming for, the pump for my current VL straight
six turbo is capable of better then 60psi sustained load and I've
been working on a SMPS driver for the pump and proportional
control valve to replace the mechanical pressure regulator since
I get injector's maxing out at around 10.5psi boost - but it goes
like the wind :-)

Thats far easier for me then modulating pump pressure output, since
I have the existing ECU to do the normal stuff,

rgds

mike

At 05:34 PM 8/8/2002 +1000, you wrote:
>Gents,
>Perhaps I'm missing something, but wouldn't you get better performance,
faster response and more accurate control if you used a pump capable of a
pressure greater than the highest you are likely to require and an
electronically controllable/variable pressure regulator with a return line?
>
>Regards
>Bill W
>
> Date: Wed, 07 Aug 2002 22:00:09
>To: diy_efi at diy-efi.org
From: Mike <erazmus at iinet.net.au>
>Subject: Re: [Diy_efi] CIS EFI via Fuel Pump PWM
>Reply-To: diy_efi at diy-efi.org
>
>At 07:54 AM 7/8/2002 -0500, you wrote:
>
>>>>> You are forgetting the rotational
>>>>> inertia of the pump rotor... and the propensity for the fuel pressure
>>>>> regulator to oscillate during a step change in flow/pressure, most
outlets
>>>
>>>
>>>The point was to PWM the pump and get rid of the regulator.  And the
>>>inertia of the pump rotor isn't affected by the length of fuel line.
>>
>
>Furthermore - I doubt you could fully do away with a pressure regulator
>if you wanted optimum response to WOT and transients in respect of WCS
> - but it would be an alternative to PWM the injectors - nonetheless
>I wouldn't want to do it that way as its dead easy to PWM injectors...
>
>
>
>Attachment Converted: "C:\MAIL\INCOMING\Diy_efiR"
>

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