2/4 Insight Engine from Ricardo
2/4 Insight Engine from Ricardo
(OP)
This is an engine which can switch between 2 and 4 strokes. Can anyone explain how this engine works?
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2/4 Insight Engine from Ricardo
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2/4 Insight Engine from Ricardo2/4 Insight Engine from Ricardo(OP)
This is an engine which can switch between 2 and 4 strokes. Can anyone explain how this engine works?
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RE: 2/4 Insight Engine from Ricardo
Link
Brian,
RE: 2/4 Insight Engine from Ricardo
Thanks once again.
RE: 2/4 Insight Engine from Ricardo
I have taken a fair bit of interest in this 2/4 engine also.
I think this is (or was) the intended mechanical switching valve gear:
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PT...
I think the original running Ricardo engine used electro-hydraulic valve gear - the mechanical valve gear was intended for later versions.
There are also other ways the mechanical switching could be done.
I suspect the switching process is meant to be so fast that it is not important what happens during this period - the engine is certainly going to be a little confused.
Even though the engine is an interesting idea I don't know just how useful it would be.
RE: 2/4 Insight Engine from Ricardo
http://www.youtube.com/watch?v=6lTwsy1oOR0
- Steve
RE: 2/4 Insight Engine from Ricardo
That is an understatement! I suspect the crankshaft design must be pretty beefy.
RE: 2/4 Insight Engine from Ricardo
RE: 2/4 Insight Engine from Ricardo
RE: 2/4 Insight Engine from Ricardo
Norm
RE: 2/4 Insight Engine from Ricardo
No. Downsizing has its challenges. This is one possible solution - to fill the missing lump of torque at lower engine speeds you get with a smaller engine. The basic idea is to use what metal you have to the best effect. There are other solutions of course.
Carrying half an unused engine around (cylinder deactivation) doesn't seem the best policy to me. Unless of course your brand image demands V8, even though only I4 power is required for most of the time. What happens to the bores of the motored bank anyway? Do they get polished?
- Steve
RE: 2/4 Insight Engine from Ricardo
Norm
RE: 2/4 Insight Engine from Ricardo
That was my initial thoughts too, albeit in a different guise.
Brian.