My electric alda ionising smoke detector idea...
My electric alda ionising smoke detector idea...
He suggested using the guts from an ionising smoke detector to monitor the amount of black smoke and then control the pwm actuator... I like the idea of this. I'm going to gut a battery powered smoke detector and get busy with the scope to try and model how the ionising chamber output changes with varying smoke levels...
I'll use this thread to track the progress of my work...
Feel free to contribute ideas everyone.
So, I was discussing the way the alda works with my work colleagues (we work in electronics) and the discussion came around to using a pwm controlled actuator on the alda pin, based on boost.
He suggested using the guts from an ionising smoke detector to monitor the amount of black smoke and then control the pwm actuator... I like the idea of this. I'm going to gut a battery powered smoke detector and get busy with the scope to try and model how the ionising chamber output changes with varying smoke levels...
I'll use this thread to track the progress of my work...
Feel free to contribute ideas everyone.
In all seriousness, he's 'sensible' and will happily start the test from a higher rpm (even though he's not meant to) so we get some boost in, and will only blip it if needed... I guess that what I need to do is make an alda from some aluminium and nylon stock with a few o-rings (i was looking at some billet aluminium dump valves I have and wondering if they could donate parts) and allow it to have a preload.
As I haven't even got my pump built up yet, not totally sure how smoky the 7.5mm floyd elements will be with my hx35 with super profile 54mm compressor. I guess it's a suck it and see kind of thing.
Yeah, that works well... apart from when my MOT tester goes and does as the emissions computer tells him and does the 'depress accelerator' bit once a year and I get an emissions failure.
In all seriousness, he's 'sensible' and will happily start the test from a higher rpm (even though he's not meant to) so we get some boost in, and will only blip it if needed... I guess that what I need to do is make an alda from some aluminium and nylon stock with a few o-rings (i was looking at some billet aluminium dump valves I have and wondering if they could donate parts) and allow it to have a preload.
As I haven't even got my pump built up yet, not totally sure how smoky the 7.5mm floyd elements will be with my hx35 with super profile 54mm compressor. I guess it's a suck it and see kind of thing.
(11-07-2010, 12:03 PM)HughF_UK once a yearCut back the throttle. Lengthen the lever stop on the pump and/or shorten the pedal rod.
ForcedInduction
11-07-2010, 12:18 PM
#4
(11-07-2010, 12:03 PM)HughF_UK once a yearCut back the throttle. Lengthen the lever stop on the pump and/or shorten the pedal rod.
Do you guys get your tests done on the rollers, so under load? Ours is just a rev it up test with different smoke levels for turbo and N/A
Yeah, that's the norm with our VE pumped cars (not many of them these days, our two diesels in the family are now vp30 pumped with bosch edc)... I'll just make some adjustments come smoke test time.
Do you guys get your tests done on the rollers, so under load? Ours is just a rev it up test with different smoke levels for turbo and N/A
ForcedInduction
11-07-2010, 12:32 PM
#6
Yes, Denver uses a loaded test at 60mph. All they're looking for here is 20% max opacity, which is pretty bad if its more than that.
To keep the photocell and light chamber clean of soot, bleed some boost into the exhaust via a very small tube to feed clean air to them.
1998 MB E300 - 194,000 miles. Current/future mods: 7.5mm pump elements, Holset HX40 Turbo feeding Eaton M90 supercharger through custom fabbed intake system. Aeroturbine muffler, scratch-built 4" stainless exhaust. EGR eliminated, ECM recalibrated, modified rack position feedback circuit. Porterfield RS brake pads, Bilstein sport shocks, VDO EGT, oil and boost gauges.
2000 Ford F250 - 150,000 miles. Current/future mods: DP Tuner 3 map chip, scratch-built high flow intake, high output IDM, open circuit fuel system, ball bearing turbo, South Bend full metal clutch, slotted and drilled rotors. Autometer Sport Comp EGT and boost gauges.
You don't even need the complexity of an ionizing smoke detector. Just a simple light source and photocell will do. Besides, the smoke from the exhaust will destroy the ionization chamber in short order...
To keep the photocell and light chamber clean of soot, bleed some boost into the exhaust via a very small tube to feed clean air to them.
1998 MB E300 - 194,000 miles. Current/future mods: 7.5mm pump elements, Holset HX40 Turbo feeding Eaton M90 supercharger through custom fabbed intake system. Aeroturbine muffler, scratch-built 4" stainless exhaust. EGR eliminated, ECM recalibrated, modified rack position feedback circuit. Porterfield RS brake pads, Bilstein sport shocks, VDO EGT, oil and boost gauges.
2000 Ford F250 - 150,000 miles. Current/future mods: DP Tuner 3 map chip, scratch-built high flow intake, high output IDM, open circuit fuel system, ball bearing turbo, South Bend full metal clutch, slotted and drilled rotors. Autometer Sport Comp EGT and boost gauges.
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
11-07-2010, 05:12 PM #8I'd have thought an o2 sensor would do the trick it's already meant for exhaust! And determines the air fuel ratio!
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
(11-07-2010, 05:12 PM)willbhere4u I'd have thought an o2 sensor would do the trick it's already meant for exhaust! And determines the air fuel ratio!Lambda?...................
Grand cherokee WK (OM642)
diesel2fast4u
11-08-2010, 01:02 PM #9(11-07-2010, 05:12 PM)willbhere4u I'd have thought an o2 sensor would do the trick it's already meant for exhaust! And determines the air fuel ratio!Lambda?...................
Grand cherokee WK (OM642)
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
11-08-2010, 06:47 PM #10same thing!
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
(11-08-2010, 07:26 PM)Einar O2/Lambda-sensor are not in use on Diesel
Yes they are.
ForcedInduction
11-08-2010, 08:19 PM
#12
(11-08-2010, 07:26 PM)Einar O2/Lambda-sensor are not in use on Diesel
Yes they are.
(11-08-2010, 07:26 PM)Einar You can use a more modern A/F sensor, O2/Lambda-sensor are not in use on Diesel, and not any more on petrol engines. Navara/Pathfinder diesel has a A/F-sensor on the exhaust.
Lambda = A/F ratio ....http://www.mrtrally.com.au/performance/d...ochure.pdf
Grand cherokee WK (OM642)
diesel2fast4u
11-09-2010, 01:20 AM #13(11-08-2010, 07:26 PM)Einar You can use a more modern A/F sensor, O2/Lambda-sensor are not in use on Diesel, and not any more on petrol engines. Navara/Pathfinder diesel has a A/F-sensor on the exhaust.
Lambda = A/F ratio ....http://www.mrtrally.com.au/performance/d...ochure.pdf
Grand cherokee WK (OM642)
Works also with high smoke superturbos
- MB w126 300SD Superturbo (US) -83, Mods: OM617A with custom head work, Master Power Turbo 802332, PP-Diesel custom 7mm IP, China intercooler, KKD-Motorsport exhaust manifold, DIY intake manifold, Coolmist Waterinjection, DIY Supermeter display/datalog with PLX Wideband Lambda, Siekkinen custom 722.3 autotrans, Elbe Performance LSD, Green Filter cold air intake, straight 3" exhaust with two dual 2.5" outputs
- MB r129 500SL AMG (JDM) -94
Full AMG bodykit, full JDM features, modified ECU and exhaust
- MB w123 250E-TT (JDM) -85
Full 1JZ-GTE twinturbo conversion, full aircon, custom china cooler, custom IC-pipes, custom sport recaro interior, custom 3-piece JDM rims
Just use wideband lambda, much easier and it's very robust.
Works also with high smoke superturbos
- MB w126 300SD Superturbo (US) -83, Mods: OM617A with custom head work, Master Power Turbo 802332, PP-Diesel custom 7mm IP, China intercooler, KKD-Motorsport exhaust manifold, DIY intake manifold, Coolmist Waterinjection, DIY Supermeter display/datalog with PLX Wideband Lambda, Siekkinen custom 722.3 autotrans, Elbe Performance LSD, Green Filter cold air intake, straight 3" exhaust with two dual 2.5" outputs
- MB r129 500SL AMG (JDM) -94
Full AMG bodykit, full JDM features, modified ECU and exhaust
- MB w123 250E-TT (JDM) -85
Full 1JZ-GTE twinturbo conversion, full aircon, custom china cooler, custom IC-pipes, custom sport recaro interior, custom 3-piece JDM rims
1 Guest(s)
1 Guest(s)