remmington
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Post by remmington on Oct 30, 2022 9:10:44 GMT 1
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remmington
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Post by remmington on Oct 30, 2022 9:33:36 GMT 1
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Post by Rhubarb on Oct 30, 2022 12:10:59 GMT 1
I can see these being used for Aircraft but not for vehicles. They surely won't have the same levels of torque compared to an inline engine, and the crank will be the weakspot. Very clever design though, gets the brain cells working too  |
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remmington
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Post by remmington on Oct 30, 2022 14:08:21 GMT 1
I can see these being used for Aircraft but not for vehicles. They surely won't have the same levels of torque compared to an inline engine, and the crank will be the weakspot. Very clever design though, gets the brain cells working too I like the idea - cannot see crank taking - stresses from three directions and lubrication is a question that is not answered in the video. But subject has really interested me - I don't see it as a "one stroke" - I just don't... Been researching it - it has set my "mind alight"  |
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Post by valhalla on Oct 30, 2022 19:10:37 GMT 1
Yes, it's a bit of a cheat calling it a one-stroke, when it should really be called a swash-plate engine.
Lots of issues with this sort of design - just image using an air-con pump to power a car for 150,000 miles.
I suspect that it will have sufficient complication to guarantee business for the future..... |
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remmington
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Post by remmington on Oct 30, 2022 21:46:04 GMT 1
Yes, it's a bit of a cheat calling it a one-stroke, when it should really be called a swash-plate engine. Lots of issues with this sort of design - just image using an air-con pump to power a car for 150,000 miles. I suspect that it will have sufficient complication to guarantee business for the future..... The subject of alternative engines has always interested me - I have followed thru my lifetime the rise and fall of Rotary engines in Norton/Suzuki bikes and Mazda cars. I had a book once - my Dad gave me about two stoke diesels - odd plane and train engines. Plus torpedo engines (swash-plate). Some of ideas are old - and get revisited every now and again. What I liked about the "one stroke" engine in the video was the adjustable compression system. ---- For the ICE engine to survive - it needs to get smaller/lighter/cleaner/more economical... |
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Post by valhalla on Oct 31, 2022 18:53:32 GMT 1
I still dream of the day that I get a Deltic under the bonnet of my Defender. With modern technology, it could be a lot cleaner than the 1950's original, but still make the same noise. Which is unparallel, IMHO, for a diesel. A proper big diesel, with the right number of cylinders (18) and the right number of pistons (36).
OK, it wouldn't appease the "glueing themselves to the road" brigade, but it would make the right noise when it ran over them.
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Post by valhalla on Oct 31, 2022 22:41:32 GMT 1
For the ICE engine to survive - it needs to get smaller/lighter/cleaner/more economical... I have been thinking about this during the evening (as you do......) and I wonder if this isn't just the demise of the ICE?
When you consider how fragile they have become, and over-stressed, is this not the symptom of going too small, too light, to achieve the nirvana of "emissions" and "economy"?
I would rather have the 1.4 petrol in my little Skoda Fabia from 2002, than the CJZC units from a decade later, yet the economy is not all that much better on the later units. I get circa 52mpg on a run with the Skoda, and my experiments with a nice-running Polo CJZC got a shade over 60mpg at-best, but only after all the fixes were successful (and remain successful, according to an Email this evening).
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remmington
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Post by remmington on Oct 31, 2022 22:50:07 GMT 1
For the ICE engine to survive - it needs to get smaller/lighter/cleaner/more economical... I have been thinking about this during the evening (as you do......) and I wonder if this isn't just the demise of the ICE? When you consider how fragile they have become, and over-stressed, is this not the symptom of going too small, too light, to achieve the nirvana of "emissions" and "economy"? I would rather have the 1.4 petrol in my little Skoda Fabia from 2002, than the CJZC units from a decade later, yet the economy is not all that much better on the later units. I get circa 52mpg on a run with the Skoda, and my experiments with a nice-running Polo CJZC got a shade over 60mpg at-best, but only after all the fixes were successful (and remain successful, according to an Email this evening).
My weak point is/was: The cars the engines go into - need to get lighter/smaller as well as the engines. You may be right - after all - ICE design is hardly going forward in leaps and bounds is it? Chuck this youtube video into the mix - from Mazda..! www.youtube.com/watch?v=aAjohUQwSXo--------- Glad I am reaching the end of my career - rather than starting it! |
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Post by valhalla on Oct 31, 2022 23:01:27 GMT 1
This was the direction that GDI was headed, but the questions still remain about the theory of raising the CR of a gasoline engine: How do you control all the unwanted emissions associated with diesel engines, without losing the benefits of the additional complexity? Primarily, NOx formation becomes a greater issue with this sort of system, unless you are prepared to run the mixture rich, as the higher combustion temperatures around "the fireball" (their terminology, not mine!) will naturally excite greater NOx production (NOx is loosely associated with "efficiency" in a combustion system).
Hmmm....  |
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remmington
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Post by remmington on Oct 31, 2022 23:06:14 GMT 1
This was the direction that GDI was headed, but the questions still remain about the theory of raising the CR of a gasoline engine: How do you control all the unwanted emissions associated with diesel engines, without losing the benefits of the additional complexity? Primarily, NOx formation becomes a greater issue with this sort of system, unless you are prepared to run the mixture rich, as the higher combustion temperatures around "the fireball" (their terminology, not mine!) will naturally excite greater NOx production (NOx is loosely associated with "efficiency" in a combustion system). Hmmm.... I think we will agree on the following statement....? "It all went wrong when we started treating diesel engines like petrol engines - high speed diesels. But the nail in the coffin will be when they have a go at treating petrol engines like diesels" |
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