I suppose what confuses people is the saying `suck, squeeze, bang, blow' which is often used to describe the four parts of the four stroke cycle. Great explanation , thanks Andy.
Good Explanation Andy. It’s also worth mentioning that the lower pressure in the cylinder on the induction stroke is caused by 2 phenomena. 1. Boyle’s Law, as the cylinder volume above the piston increases the pressure within it decreases. 2. The momentum of exhaust gas, which creates a low pressure trail behind the high pressure exhaust pulse. Close the exhaust valve at the correct time and the cylinder is already lower that atmospheric pressure before the piston is even on its way down. This is why you don’t get far without an exhaust pipe.
Language is a funny thing, most of us understand terms which are not scientifically correct. If my wife blocks the vacuum cleaner up, she gets upset that it is not sucking. And from that description I know what needs fixing. She does not need a lecture from me how it is atmospheric pressure that fills the void, when you take the thing apart you take it for granted that the air is shifted by centrifugal force (which does not actually exist). But the job gets done. Found your channel via the Workshop, you both have very different styles but enjoy them both. Loved the care and attention you put into the XS1100 engine. Having once had an Australian girlfriend I realise a headjob is a different thing in your part of the world. Keep up the good work.
A long time ago when i was at collage studding as a mechanic while taking about the carburettor if you said "the low pressure created in the venturi SUCKED the fuel from the float chamber" you would get the board rubber thrown at you. I can still hear my lectures voice yelling "the fuel is pushed in by the atmospheric pressure acting on top of it you idiot !!!!" Ask him if he can suck his drink up from a sealed container?
ausi slant? did he mean it's upside down? Okay...fluids move from area of high pressure to are of low pressure. a piston creates suction in a cylinder and draws air from the higher pressure air outside the intake port. The driving force is the higher perssure, but the mechanism making it higher is the piston suction You made a play on words and your viewer responded literally.
G'day Jeff, thanks for watching mate, and thanks for the comments. I don't believe I made a play on words, I was trying to highlight why scavenging is required and explain the limitations of an intake system that help create residual exhaust gasses. He just became fixated on a dictionary definition for a word and lacked the maturity to move past it. In the event that there were others confused by my explanation I decided to take the time to explain further. Mechanics and engineers understand it but others may not, I was just trying to clarify. Thanks again, Andy
Well let me move past my misperception then. I guess I made the leap to "Engines don't suck, Intake air blows." viewing your break-in discussion now, and i picked up a bit more of that topic again. And thnk YOU, Andy, for sharing all your process with us. I'm benefitting with my 1980 XS G restoration.
It's all good Jeff, I sometimes muddle my words up a bit and I don't always get things right. But I have worked with fluid dynamics my entire life and spent 20 years in breweries working with it everyday. I have no issue with being schooled if I speak about something that I don't really understand but I won't be told I'm "speaking bollocks" when I know I'm not. Don't give up on the 'G', keep the XS love going mate.
I suppose what confuses people is the saying `suck, squeeze, bang, blow' which is often used to describe the four parts of the four stroke cycle. Great explanation , thanks Andy.
Cheers mate
Good Explanation Andy. It’s also worth mentioning that the lower pressure in the cylinder on the induction stroke is caused by 2 phenomena. 1. Boyle’s Law, as the cylinder volume above the piston increases the pressure within it decreases. 2. The momentum of exhaust gas, which creates a low pressure trail behind the high pressure exhaust pulse. Close the exhaust valve at the correct time and the cylinder is already lower that atmospheric pressure before the piston is even on its way down. This is why you don’t get far without an exhaust pipe.
This video didn't suck, it was very informative & on point.
Thanks mate, and thanks for watching
Andy your always very informative. Its good to hear.
Language is a funny thing, most of us understand terms which are not scientifically correct. If my wife blocks the vacuum cleaner up, she gets upset that it is not sucking. And from that description I know what needs fixing. She does not need a lecture from me how it is atmospheric pressure that fills the void, when you take the thing apart you take it for granted that the air is shifted by centrifugal force (which does not actually exist). But the job gets done. Found your channel via the Workshop, you both have very different styles but enjoy them both. Loved the care and attention you put into the XS1100 engine. Having once had an Australian girlfriend I realise a headjob is a different thing in your part of the world. Keep up the good work.
Very informative, thanks!
Thank you, Andy
Good explanation Gerg.
Thanks Pickles, I reckon you and I have worked with engines and fluid dynamics long enough to have some idea what we're talking about.
Thanks very informative ❤
Excellent job Andy, I feel like I should get a certificate after this series lol. Exam Question - Is your name Allan Byrne?
Answer - N0 ... you pass.
You pass Justin, thanks for watching
Couldn't and I tried lol to explain it better - things just sound better with a convict accent lol - great vid dude - matt
Cheers mate, I have subsequently seen that video and as always, you were bang on point.
Well, you couldn't have explained it any better than that Andy. I think he must have understood what you were saying by now. Lol !
God I hope so, I will start to feel bad if I have to repeat myself. Thanks, as always mate.
A long time ago when i was at collage studding as a mechanic while taking about the carburettor if you said "the low pressure created in the venturi SUCKED the fuel from the float chamber" you would get the board rubber thrown at you. I can still hear my lectures voice yelling "the fuel is pushed in by the atmospheric pressure acting on top of it you idiot !!!!" Ask him if he can suck his drink up from a sealed container?
I see no thumb down... that means the "keyboard warrior" didn't see the video, yet. Well done response, sir.
Thanks mate
1 yr later still no thumbs down
What if I install a small fan near air intake will it help ?
ausi slant? did he mean it's upside down? Okay...fluids move from area of high pressure to are of low pressure. a piston creates suction in a cylinder and draws air from the higher pressure air outside the intake port. The driving force is the higher perssure, but the mechanism making it higher is the piston suction You made a play on words and your viewer responded literally.
G'day Jeff, thanks for watching mate, and thanks for the comments. I don't believe I made a play on words, I was trying to highlight why scavenging is required and explain the limitations of an intake system that help create residual exhaust gasses. He just became fixated on a dictionary definition for a word and lacked the maturity to move past it. In the event that there were others confused by my explanation I decided to take the time to explain further. Mechanics and engineers understand it but others may not, I was just trying to clarify. Thanks again, Andy
Well let me move past my misperception then. I guess I made the leap to "Engines don't suck, Intake air blows." viewing your break-in discussion now, and i picked up a bit more of that topic again. And thnk YOU, Andy, for sharing all your process with us. I'm benefitting with my 1980 XS G restoration.
It's all good Jeff, I sometimes muddle my words up a bit and I don't always get things right. But I have worked with fluid dynamics my entire life and spent 20 years in breweries working with it everyday. I have no issue with being schooled if I speak about something that I don't really understand but I won't be told I'm "speaking bollocks" when I know I'm not. Don't give up on the 'G', keep the XS love going mate.
haha told that keyboard warrior. well done andy
+Brian Batten 😎
Next you will be telling me hot air doesn’t rise oops can and worms come to mind lol 😀
Don't feed the trolls Andy .........lol
lol