Pulse Jet Ignition - Claimed 10% increase in power |
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Simon_London
Guzzino Joined: 28 Dec 2017 Location: London Status: Offline Points: 7 |
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Posted: 28 Dec 2017 at 18:49 |
Any comments?
https://www.ebay.co.uk/itm/Moto-Guzzi-Le-Mans-1-2-V850-Pulse-Jet-Ignition-Kit/142638263532?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160727114228%26meid%3D2466aaba34e6495b82c595b22c2b70dd%26pid%3D100290%26rk%3D1%26rkt%3D4%26sd%3D142638263532&_trksid=p2060778.c100290.m3507 https://www.sinrojamotorcycles.co.uk/aboutpulsejet |
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Oldrat
Senior Member Joined: 31 May 2014 Location: Harrow Status: Offline Points: 1659 |
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Mixtures burn, they don’t explode. Consequently having a single spark plug over a very broad pistion crown means that the mixture at the edges of the piston are the last to ignite.
Various shaped piston crowns and squish chambers try to overcome this by swirling the mixture and encouraging a full and complete burn, hence more efficient. I can’t see how this device helps spread the ignition of the gases further or quicker as the spark remains in almost exactly the same place despite the ‘pre combustion chamber’ Now, IMHO twin plugging a tonti is the way to go to get a more efficient burn I do however want to be wrong on this as it’s an Englishman who invented it Edited by Oldrat - 28 Dec 2017 at 19:37 |
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1976 "Zagato" Gootsi cafe racer
BMW GSA |
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Jerry atric
Senior Member Joined: 24 Nov 2014 Location: Wiltshire Status: Offline Points: 3367 |
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I'd like to think they are great, we need something to sell to the rest of the world. They can't be any more useless than the Spitfire thing you put in the HT lead, or the bits of lead to put in your tank!
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Something in the back of my memory tells me this idea came out at least 50 years ago. Never caught on then.
If you think about this, the spark will ignite the small charge of mixture inside that cap. It then will progress through those little holes and into the remainder of the combustion chamber. This has got to delay things.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Well this is a start. 1982.
and this
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Simon_London
Guzzino Joined: 28 Dec 2017 Location: London Status: Offline Points: 7 |
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Impressive knowledge Brian.
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V7Chris
Senior Member Joined: 13 May 2017 Location: Powys Status: Offline Points: 1882 |
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Indeed! How on earth do you remember all this information Brian? I find these days that I have to forget something to make room in my tiny mind to learn something new, only the other day, I forgot how to wash up and so had to leave my dirty coffee mug in the sink for my wife to wash up...As far as the plasma plug is concerned, it won't work. If out did, Honda would have been fitting them as standard for years to their bike and cars. Chris |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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I remembered seeing something way back, the rest is down to Mr Google helping.
Can't remember what I did yesterday of course.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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c13pep
Senior Member Joined: 31 Aug 2017 Location: Doncaster Status: Offline Points: 2110 |
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The logic of this idea seems to be sound and I can see its appeal but not at £120, however the possibility of reduced exhaust gas temperature especially for the V50s etc. could mean no more petrol additives. Now that`s a thought!!
CHRIS |
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you can`t have any fun in a straight line
Monza Honda CB77 project |
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jpc
Senior Member Joined: 06 Oct 2016 Location: Belgium Status: Offline Points: 651 |
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The Pulse-Jet sparkplug gizmo is not very convincing (as stated above), but it steered me to this
page that is quite interesting : http://www.mahle-powertrain.com/en/experience/mahle-jet-ignition/ Really for curiosity's sake, but much more convincing. jp
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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
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That looks a bit like the old diesel indirect injection system (although of course diesels don't have spark plugs.....)
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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jpc
Senior Member Joined: 06 Oct 2016 Location: Belgium Status: Offline Points: 651 |
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It's hard to imagine how masking the spark in a perforated chamber is going to help or speed up
flame propagation... Apparently "a bottle of red and some cheese" helps. I bet it does... Edited by jpc - 29 Dec 2017 at 11:40 |
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c13pep
Senior Member Joined: 31 Aug 2017 Location: Doncaster Status: Offline Points: 2110 |
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A bottle of red and some cheese always helps, it may not solve the problem but it certainly makes it less important!!
CHRIS |
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you can`t have any fun in a straight line
Monza Honda CB77 project |
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nab301
Senior Member Joined: 29 Oct 2017 Location: Dublin Ireland Status: Offline Points: 443 |
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Plenty of happy people on BMW oilhead (2 valve) forums , maybe a bit of crowd funding with a before and after dyno run and fuel consumption test would be the way to go !!!!
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Nigel
Keep smiling , it makes people wonder what you've been up to! '19 CB125F, '18 DL250 SUZUKI V STROM,'99 Bmw R1100S, '03Bullet 65 500, '93 MZ301 Saxon fun (offroad) |
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motopete
Senior Member Joined: 18 Aug 2015 Location: Notts Status: Offline Points: 532 |
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+1
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