BMW K bikes (Bricks)


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Dai

Dai
Life time member
Life time member
I guess this is aimed at Robmack and/or charlie99 because my analogue circuit design skills died about the same time as CP/M diappeared. What I'm thinking along the lines of is an adjustable oscillator driven by something such as a 555 and having a beefy enough output stage to be able to switch a fuel injector (2N3055 or similar? IIRC that was capable of switching three amps). The switching rate could be adjustable for between say 10ms and 500ms? This would allow the poor sucker person who is trying to clean their fuel injectors to concentrate on maintaining a steady input pressure with the carb cleaner. I really needed three hands for this job today, instead of two hands and an elbow. Hitting yourself with a steady stream of carb cleaner gets wearing really fast.


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1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

robmack

robmack
Life time member
Life time member
The design you're looking for is published by Dinofab.  It's a dual 555 based circuit with adjustable frequency as you desire as well as monostable operation which fires the injectors for a fixed duration.  I've a board designed for this project but never got beyond the prototype stage.


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Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

charlie99

charlie99
VIP
VIP
yeah we did that already dai

you didn't see albys ic3000 ?

I also have an adjustable frequency one here also

still crudely just a pc board and some cables ...but it works

back with pics in a sec

heres robmacs addition to a thread

https://www.k100-forum.com/t3024-cleaning-fuel-injectors#31050

and albys ic 3000

https://www.k100-forum.com/t3111-introducing-the-k-ic3000

and my injector sequencer - pulser

Oscillator circuit for testing fuel injectors? 20160210


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

Dai

Dai
Life time member
Life time member
Well, that really will teach me to run a proper forum search first Embarassed Embarassed Embarassed . Many thanks gents - I think I'm going for the Dinofab one.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

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