lsdweb
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| posted on 15/4/11 at 04:54 PM |
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Oil pressure control for fuel pump
Hi All
I want my fuel pump (low pressure) to shut off when the engine stops (safety etc). Easiest way is to control the fuel pump relay via the oil pressure
switch (with a 'bypass' for starting).
However, the only way I can think of doing this without any fancy electronics is to use a normally closed relay (which I don't want to do as
this would fail safe to pumping fuel), or to use 2 relays (too complicated!).
I'm sure I've seen a diagram somewhere on the web but can't find it!
Anybody got any wonderful ideas?!
Ta
Wyn
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britishtrident
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| posted on 15/4/11 at 06:30 PM |
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Rover used an NO oil pressure switch for this in the late 1908s early 1990s --------- istr late SD1, 1980s 216S (3 box shape), Rover 820
Mk1
see ebay Item number: 290556341566
Intermotor 51011
1 Terminal 1/8" x 27NPTF
2.9-7.3PSI .19-.49Bar
N/O
AUSTIN Maestro 1.6
AUSTIN Metro 1.3
AUSTIN Montego 1.6
AUSTIN Montego 2.0
MG Maestro 1.6
MG Metro 1.3
MG Montego 2.0
ROVER 216 1.6
ROVER 820 2.0
ROVER Maestro 1.6
ROVER Montego 2.0
Replaces
Rover DRC3203
Rover EEP279
[Edited on 15/4/11 by britishtrident]
[Edited on 15/4/11 by britishtrident]
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britishtrident
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| posted on 15/4/11 at 06:52 PM |
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And you will need an N/O relay wired to to bypass it when the starter is operated.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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stevebubs
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| posted on 15/4/11 at 07:10 PM |
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Presuming you're on carbs?
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lsdweb
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| posted on 15/4/11 at 07:28 PM |
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Thanks britishtrident - how do you know all this stuff? :-)
Stevebubs - yep carbs. 1963 Lotus Elan (26R) - Lotus Twin cam on 45 DCOEs - No FI in those days although there was, a little bit later on , the
Tecalmet Jackson mechanical FI that nobody could get to work properly!
Wyn
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lsdweb
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| posted on 16/4/11 at 09:26 AM |
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Initial thoughts on how to do it with just one relay........
The down side is the oil pressure lamp would always go out when using the momentary switch, although I have a gauge.
[Edited on 16/4/11 by lsdweb]
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