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sir, small negative loop indicates that the work is taken from the engine (may be to move the piston from TDC to BDC). What about the small positive loop during the suction stroke. Similarly, could you explain the negative and positive loop during the exhaust stroke? Thank you!
During suction stroke first there is a small negative loop bcoz work is taken from the engine to move piston from TDC to BDC,a small positive loop during suction means that due to air entering into the cylinder a force is exerted by the air on the piston,so we get a small amount of positive work but it is not sufficient to drive the engine.During exhaust stroke,at first piston has to move up from BDC to TDC in order to remove the exhaust gases from the cylinder,so engine provides that work,hence a negative loop.Once the exhaust gases start moving out of the engine at high velocity then some of the gases will escape on their own without the piston moving them..so piston does not have to take more work from the engine.
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The turning moment diagram for a petrol engine is drawn to a scale of 1mm to 6N-9-9m and the horizontal scale of 1mm to 1˚.The turning moment repeat itself after every half revolution of the engine. The area above and below the mean torque line are 305, 710, 50,350,980and 275mm2. The mass of rotating parts is 40kg at a radius of gyration of 140mm.Clculate the coefficient of fluctuation of speed if the mean speed is 1500rpm.
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Prabhanjan Mishra At the beginning of suction stroke the piston has to work against the +ve pressure thus some energy from flywheel is consumed(negative loop). However after some 100-130deg. Into the suction stroke the charge of air has momentum to push the piston ...thus the little positive loop. The reason for exhaust is the same concept. I'm open for suggestions. Thanks
nirmal prasad We recorded your response. We will Come back to you shortly. Stay tuned with ekeeda channel for more videos. nirmal prasad we request you to share our work with your friends and family. BECAUSE YOUR LOVE GIVES US POWER TO PRODUCE MORE AND MORE GOOD CONTENT TO SPREAD THE QUALITY FREE EDUCATION. You can Subscribe by clicking on below link th-cam.com/users/ekeeda nirmal prasad you can Help Us to Improve our Service. #nirmal prasad #Ekeeda #YourVirtualTeacher #LoveEducaion #OnlineLectures For more Educational Information or to Ask Question to #SubjectExpert Visit ekeeda.com You can also provide us Financial Help to continue this good work www.patreon.com/ekeeda
Here's the solution: Please visit for all the videos 1. Moment of Inertia th-cam.com/play/PLm_MSClsnwm9h1TQXJS6hUVCPf60fSZE5.html 2. Simple Stresses and Strain th-cam.com/play/PLm_MSClsnwm-xZi5TMWdFGz7FTwUMAj4N.html th-cam.com/play/PLm_MSClsnwm-7G-AEi3Wj83H6UOaDyuoP.html 3. Elastic Constants th-cam.com/play/PLm_MSClsnwm_lVBR6gtzSGIg-O1w3wQpz.html 4. Shear Force and Bending Moment th-cam.com/play/PLm_MSClsnwm9YFDi0iS1GqA5TBi0mId4v.html
kurunandan shishaudhiya may be amount of energy requirement for completion of suction stroke is less but stored energy is supplied which was produced during power stroke is large so positive loop is formed as that amount of neither used during suction.
rabi shrestha Thank You. Stay tuned with ekeeda channel for more videos. rabi shrestha we request you to share our work with your friends and family. BECAUSE YOUR LOVE GIVES US POWER TO PRODUCE MORE AND MORE GOOD CONTENT TO SPREAD THE QUALITY FREE EDUCATION. You can Subscribe by clicking on below link th-cam.com/users/ekeeda rabi shrestha you can Help Us to Improve our Service. #rabi shrestha #Ekeeda #YourVirtualTeacher #LoveEducaion #OnlineLectures For more Educational Information Visit ekeeda.com You can also provide us Financial Help to continue this good work www.patreon.com/ekeeda
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sir, small negative loop indicates that the work is taken from the engine (may be to move the piston from TDC to BDC). What about the small positive loop during the suction stroke. Similarly, could you explain the negative and positive loop during the exhaust stroke? Thank you!
During suction stroke first there is a small negative loop bcoz work is taken from the engine to move piston from TDC to BDC,a small positive loop during suction means that due to air entering into the cylinder a force is exerted by the air on the piston,so we get a small amount of positive work but it is not sufficient to drive the engine.During exhaust stroke,at first piston has to move up from BDC to TDC in order to remove the exhaust gases from the cylinder,so engine provides that work,hence a negative loop.Once the exhaust gases start moving out of the engine at high velocity then some of the gases will escape on their own without the piston moving them..so piston does not have to take more work from the engine.
Super
Great fantastic and superb sir.and all the best for your next activities
You are the best teacher for Mechanical engineer's
thanku siR..ur lecture is very helpful .for students...👍👍👍
#Ekeede thanks for making these videos as they are very much helpful while preparing for university exams... Thank You
can you make more videos to help us in tom (theory of machine)
THANK YOU FROM ALGERIA
Really impressive video it saves my time thank you very much sir for making such type of useful video for us
sir very hepful i have exams in 19 june 2019 of dom thanks for the lectures thanks alot
Nice brother...awesome video..please make video about much more topics
Thankyou for the appreciation we are more than happy to hear that you have liked this video and you want us to record many more videos on different topics.
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thank u for good concept. but we need some problems related to flywheels
Explain very clearly how it changes from positive to negative and why it changes at specific points
It is good
.....I want more ....problems on turning movement diagrams....
Sir Can we have a problem on this topic it will be more useful ..
Thank You
Thank you so much man it's my pleasure and I will try to share this type in a vedio
You are most welcome.
thanku sir ur lecture is very helpful
Nice sir 👍❤️
The turning moment diagram for a petrol engine is drawn to a scale of 1mm to 6N-9-9m and the horizontal scale of 1mm to 1˚.The turning moment repeat itself after every half revolution of the engine. The area above and below the mean torque line are 305, 710, 50,350,980and 275mm2. The mass of rotating parts is 40kg at a radius of gyration of 140mm.Clculate the coefficient of fluctuation of speed if the mean speed is 1500rpm.
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good explanation ,thanks
very useful. thank you sir
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We request you to give us your valuable reviews so that our forthcoming videos would be more beneficial to the learners and further help them to view various videos for their future learning process.
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Sir please also upload IC engine numerical...
very nice sir ...heartly thanks for clearing our doughts
Why there is a small +ve loop at the end of suction as well as exhaust loop in turning momemt diagram of four stroke ic engine?? plz explain it.
Prabhanjan Mishra
At the beginning of suction stroke the piston has to work against the +ve pressure thus some energy from flywheel is consumed(negative loop). However after some 100-130deg. Into the suction stroke the charge of air has momentum to push the piston ...thus the little positive loop.
The reason for exhaust is the same concept.
I'm open for suggestions. Thanks
thank you
+sagar bhoir welcome
can i find your videos of balancing and dynamics force analysis ( tom-2)
nice video thank u sir
Useful
hi..it diagram for single cylinder?please reply me.
Why small positive lope is in compressor stroke please reply asap
sir can i know the name of this legend whoz saying the lecture
i've become a great fan of his lecture
Mr. Zafar Shaikh is the name of the Legend
Thanks for watching, stay tuned.
Can we have the governor s problem and types of governors prooblems
-sir plz u r requested nt to make the Audience fool........ why some positive loop is formed on suction stroke?
sir how to find your videos for all mehanical topics
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Here's the solution:
Please visit for all the videos
1. Moment of Inertia
th-cam.com/play/PLm_MSClsnwm9h1TQXJS6hUVCPf60fSZE5.html
2. Simple Stresses and Strain
th-cam.com/play/PLm_MSClsnwm-xZi5TMWdFGz7FTwUMAj4N.html
th-cam.com/play/PLm_MSClsnwm-7G-AEi3Wj83H6UOaDyuoP.html
3. Elastic Constants
th-cam.com/play/PLm_MSClsnwm_lVBR6gtzSGIg-O1w3wQpz.html
4. Shear Force and Bending Moment
th-cam.com/play/PLm_MSClsnwm9YFDi0iS1GqA5TBi0mId4v.html
5. Bending Stresses th-cam.com/play/PLm_MSClsnwm9igju3TyxbZU18E21sApWz.html
6. Torsion
th-cam.com/play/PLm_MSClsnwm8NNXFSqauM9v1dtPQ27TG5.html
7. Slope and Deflection
th-cam.com/play/PLm_MSClsnwm9XJjdRRM_QIrwQa55mpsZs.html
8. Columns & Struts
th-cam.com/play/PLm_MSClsnwm_iXTdVGHegIyV_-bSSl6_-.html
Thank u sir
During suction some part is positive and some negative. .why?
kurunandan shishaudhiya may be amount of energy requirement for completion of suction stroke is less but stored energy is supplied which was produced during power stroke is large so positive loop is formed as that amount of neither used during suction.
totally worng , +loop is caused by the momentum of the fresh charges entering during the suction stroke .
kailash chandrakar truly said...brother
@@kailashchandrakar4958 what about exhaust stroke
what is torque given by car campany t(mean) or torque(max)?
Very good lecture
Are bhai suriaat me +ve loop jo he or end me Jo he vo Kyo hota he vo to batao... Pls help us
Yep is clear now
rabi shrestha Thank You. Stay tuned with ekeeda channel for more videos.
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During exhaust stroke their is small positive loop why?
'will get back to you on this
Useful
sir thank you