[Ducati] exhaust energy, turbos and diesels

[Bob Marren]

Suck, squeeze, bang and blow. The Otto principle.
The noise is from the pules being super-sonic. My old
Studebaker was supercharged, spunky for a 289 CI.
 Bob

Ronald Betts wrote:

>Turbos on aircraft engines have been around for decades. When I schooled for my A&P I was astounded to find turbos on engines made in the early 50s. Aircraft engineers have used turbos, intercoolers and water injection for a long time. Of course were comparing apples to oranges when comparing aircraft, marine and road vehicle usage of the internal combustion engine. 
>Heres another couple of questions for the minions, What actually occurs to the intake mixture at ignition ? And , What are the five events of the 4 cycle engine?
>Oh one more, What actually makes the noise coming out of the exhuast ?
>Duc content: These things do occure on my Duc.
>Peace...Ron"Desmohead"Betts 95 900 SPI've learned that I don't suffer from insanity, I enjoy it!> Date: Tue, 27 Nov 2007 06:50:04 -0800> From: Tim at pacificblasting.com> To: ducati at ducati.net> Subject: [Ducati] exhaust energy, turbos and diesels> > Brad, interesting thoughts about multi staged turbos. That's what would> be needed for gasoline powered sporting engines to be effective, let> alone efficient. Spent some years learning about and tuning turbo cars.> The 1.8T being the last effort. > > My conclusions are that in its current technology, turbocharging does> not make at ton of sense unless you had no other way to make power.> Seems to me, unless you are running at a constant rpm (planes,> generators, big rig diesels etc) the physics of turbo inertia works> against the "sporting feel" most of us gear heads want out of an engine.> And to your point, it also beats the hell out of the efficiency and> economy especially given the added maintenance (oil changes, turbo &> waste gate failures, cooling system stress, pressure leaks) and reduced> engine life. > > In the case of the 1.8T, it is hardly a world beater in economy even> though it is turbocharged; even using a power per unit of fuel> measurement. If it were, we'd be seeing turbos show up in hybrids and> other green vehicles. It is not a panacea and in fact it's probably the> wrong technology period.> > Tim > > ------------------------------> > Message: 7> Date: Tue, 27 Nov 2007 22:58:30 +1100> From: "Kerry and Brad Black" <bikeboy at alphalink.com.au>> Subject: [Ducati] exhaust energy, turbos and diesels> > .......which brings me on to my point. if you wanted to make real use> of the energy going out the exhaust you'd have either a wide ranging> variable turbo (not sure if they exist) or a twin / triple / quad turbo> set up. the smallest turbo would be boosting while you were cruising> around at 60 - 100km/h, because in reality that's where a lot of bikes> spend a lot of time (mine does) and when they're also very inefficient.> > most people don't worry about this sort of stuff tho, and no one turbos> a bike to help the part throttle fuel economy. but when you're running> an interstate truck and spending $100,000 a year on fuel (probably> more), 1% increase in economy is a decent chunk of cash. 10% makes> owners take real notice.> > brad> > > *****> > Our newest sponsor, MC Stands, has just opened its doors! It's a motorcycle> stand superstore. Every brand, every model, 95% in stock for immediate> shipment. Whether front stands, rear stands, paddock stands, dirt bike> stands, or any kind of stand or lift, MC Stands tests, rates, and discounts> everything they sell. Check them out!> > Visit: http://mcstands.com/> _______________________________________________> Ducati mailing list> Ducati at ducati.net> http://list.ducati.net/cgi-bin/mailman/listinfo/ducati> Mailto: ronaldebettsasalc0015 at hotmail.com
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