some engine questions....

**JDNSW** · 10th November 2008, 05:25 AM

I'll have a go too.

Originally Posted by Blknight.aus

ok so Im bored..... I'll give answers in a couple of weeks....

think you know engines and motors....

What types of engines/motors provide better preformance at higher altitudes without having to be retuned?

Supercharged or turbocharged

What types of motors/engines provide maximum torque at 0 Rpms.

Reciprocating steam or compressed air engines, some types of electric motor, hydraulic motors

Whats the maximum number of strokes that a reciprocating engine has used and remained effective?

Could be quite high and indeterminate if you include engines with a hit and miss governor and count the number of strokes between powere strokes.

does a reciprocating engine have to have a crank shaft?

No. For example, a free piston engine.

can a diesel engine have a carby, more importantly can it have it as the only source of fuel that gets to the combustion chamber?

Yes. 1. those engines that start as a petrol engine
2. Oil engines using hot bulb ignition, although whether you call the device that mixes oil and air a carburetter is a question, also whether these are strictly a diesel engine

do you have to have valves in a reciprocating diesel engine?

No - some rely entirely on ports in the cylinders, particularly opposed piston engines. Also note some diesels have had sleeve valves.

what fueled the first reciprocating engines?

Steam reciprocating engines were first coal fired. Internal combustion engines first used gunpowder, then coal gas.

running diesel can you put 2 pistons into a single cylinder? if you can how could you make it work?

Yes, opposed piston engines. Most notably the Junkers submarine engine of WW1, later used/copied in aircraft engines and probably most familiarly in the Commer knocker. These have two pistons opposite each other, with their connecting rods going to rockers and thence to the crankshaft which is alongside the midpoint of the cylinders.

have fun....

How about another couple of questions:-

Who uses variable compression engines and why?

What did the first diesel engines run on?

What is a turbo-compound engine?

What was the first mass produced engine with a detachable cylinder head covering all cylinders?

When were the first diesel cars on sale? (Make, where?)

What was the first diesel car sold in Australia?

John

**paulthepilot_5** · 10th November 2008, 07:22 AM

Originally Posted by JDNSW

I'll have a go too.

How about another couple of questions:-

Who uses variable compression engines and why? SAAB SVC. it reduces the comp ratio when high power is required to reduce knocking. compresion ratio is increased to improve the efficiency at low power settings.

What did the first diesel engines run on? coal powder

What is a turbo-compound engine? a turbo charged engine in which a combustion chamber is placed in parrallel with the engine relative to the turbo. When engine is at low power settings the combustion chamber acts as a gas generator for the turbo to keep it spooled up and make instant boost available.

What was the first mass produced engine with a detachable cylinder head covering all cylinders?

When were the first diesel cars on sale? (Make, where?)

What was the first diesel car sold in Australia?

John

not sure about the rest

**Bigbjorn** · 10th November 2008, 08:25 AM

Turbo-compound design was used by Wright in aircraft engines. The turbochargers had output shafts geared to the crankshaft via a fluid coupling thus using the enrgy of the hot expanding exhaust gases to both compress the intake charge and drive the crankshaft. This is what I understand the term "turbo-compound" to mean. The 4360 cubic inch "corn-cob" was the ultimate expression of this design. A four row twenty-eight cylinder radial. The mass of cylinders were said to look like the kernels on a cob of corn.

**Pedro_The_Swift** · 10th November 2008, 08:48 AM

link no work,,

**Pedro_The_Swift** · 10th November 2008, 08:52 AM

Thanks to your post Brian I found this excellent site!
Google Image Result for http://fastjeff57.tripod.com/bristol.jpg

A site for anyone interested in engines.

**JDNSW** · 10th November 2008, 12:24 PM

Originally Posted by Brian Hjelm

Turbo-compound design was used by Wright in aircraft engines. The turbochargers had output shafts geared to the crankshaft via a fluid coupling thus using the enrgy of the hot expanding exhaust gases to both compress the intake charge and drive the crankshaft. This is what I understand the term "turbo-compound" to mean. The 4360 cubic inch "corn-cob" was the ultimate expression of this design. A four row twenty-eight cylinder radial. The mass of cylinders were said to look like the kernels on a cob of corn.

Pretty close - actually the same turbines were not used for both compressing the intake charge and gearing to the output shaft, but separate turbines.

The Napier Nomad engine used a gear driven compressor, but with exhaust turbines geared to the propeller shaft to provide up to 70% of output power.

The term could be applied as well to steam engines using both reciprocating and turbine stages - this was used in a number of ships and a few locomotives, where it was found that a fourth or fifth stage of expansion was easier to fit in with a turbine, as a cylinder would be too large.

John

**paulthepilot_5** · 10th November 2008, 02:22 PM

Originally Posted by Brian Hjelm

Turbo-compound design was used by Wright in aircraft engines. The turbochargers had output shafts geared to the crankshaft via a fluid coupling thus using the enrgy of the hot expanding exhaust gases to both compress the intake charge and drive the crankshaft. This is what I understand the term "turbo-compound" to mean. The 4360 cubic inch "corn-cob" was the ultimate expression of this design. A four row twenty-eight cylinder radial. The mass of cylinders were said to look like the kernels on a cob of corn.

HA HA, bugger, i was getting turbo compounding mixed up with Hyper-Charging

Actually had a Wright engine out of a Neptune siting around at work for a while too, a good example of a Turbo-Compound engine

**isuzurover** · 10th November 2008, 03:18 PM

Another question: Which reciprocating engine is solar powered?

mcrover · 10th November 2008, 03:57 PM

Originally Posted by JDNSW

I'll have a go too.

How about another couple of questions:-

Who uses variable compression engines and why?a.Peugeot, Kubota, Diahatsu, Maybe Mitsubishi ? b. For easier starting and better economy for continuous running at contant revs in stationary situations, automotive I dont know

What did the first diesel engines run on?Peanut oil

What is a turbo-compound engine?No idea but a couple of answers in above posts

What was the first mass produced engine with a detachable cylinder head covering all cylinders?Dont know

When were the first diesel cars on sale? (Make, where?)I would say pretty early on, probably in europe most likely Germany

What was the first diesel car sold in Australia?Peugeot something 504 or something like that I think.....probably wrong though

John

Im just guessing most of it......obviously

**clean32** · 10th November 2008, 04:15 PM

Originally Posted by isuzurover

Another question: Which reciprocating engine is solar powered?

Stirling

Thread: some engine questions....

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