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Need Help Understanding Diesel Cycle | |||
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Posted by: Rebecca Pierik ® 05/27/2005, 10:25:21 Author Profile Mail author Edit |
Dear Engineers, I'm editing a textbook about technology and engineering for high schools students and am wondering if one of you may be able to shed some light on a topic of discussion in our editorial group, which includes engineers and non-engineers. In one of our chapters we discuss the diesel cycle using the gas laws. (The text is for ninth-graders, so we're trying to keep it fairly simple without sacrificing accuracy. Here's how we currently explain the cycle in our draft: 1. As the piston drops, the intake valve opens, and air is taken into the chamber.
I understand how the pressure in the chamber pushes the piston down in step 3, but i'm having a hard time understanding what causes the piston to rise or fall in steps 1,2, and 4. Is it that the piston is working in tandem with other cyliders that push or pull on it? Does it have something to do with temperature variations in the beofre and after the explosion? chamber? |
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Re: Need Help Understanding Diesel Cycle | |||
Re: Need Help Understanding Diesel Cycle -- Rebecca Pierik | Post Reply | Top of thread | Forum |
Posted by: spgautam ® 06/26/2005, 10:38:17 Author Profile Mail author Edit |
Dear friend
hi basically what happens is that in any engine an nergy storing device called flywheel is attached which stores energy during power stroke that is when fuel is burned and piston starts moving down due to expansion and it release the stored energy in other steps about which you are asking . energy stored depends upon the mass moment of inertia of flywheel used . hopefully problem is solved . if not feel free to ask bye spgautam |
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Re: Need Help Understanding Diesel Cycle | |||
Re: Need Help Understanding Diesel Cycle -- Rebecca Pierik | Post Reply | Top of thread | Forum |
Posted by: randykimball ® 05/30/2005, 22:10:17 Author Profile Mail author Edit |
Hi, and welcome, Here is an excellent site with simple steps well explained in about the same level you would be using. Perhaps the author would like to hear form you and offer some advice or copyright usage. https://www.qrg.northwestern.edu/thermo/design-library/diesel/diesel.html If you do not get what you need or if you have any more questions PLEASE ask. -randy- The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. |
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Re: Need Help Understanding Diesel Cycle | |||
Re: Re: Need Help Understanding Diesel Cycle -- randykimball | Post Reply | Top of thread | Forum |
Posted by: Kelly_Bramble ® 05/31/2005, 08:16:49 Author Profile Mail author Edit |
You can find a basic explanations on Diesel Cycles on the Engineers Edge at /power_transmission/power_transmission_menu.shtml as well. |
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Re: Need Help Understanding Diesel Cycle | |||
Re: Re: Need Help Understanding Diesel Cycle -- Kelly_Bramble | Post Reply | Top of thread | Forum |
Posted by: randykimball ® 05/31/2005, 20:03:39 Author Profile Mail author Edit |
... And a GREAT explanation it is. Wow, this is tremendously fast growing data base and an increasingly fantastic asset of a web site !!!! I must go browsing around in it again. .. and more often.. Great Job !!!!!!!! it is good to be connected. -randy- The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. |
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Re: Need Help Understanding Diesel Cycle | |||
Re: Need Help Understanding Diesel Cycle -- Rebecca Pierik | Post Reply | Top of thread | Forum |
Posted by: zekeman ® 05/27/2005, 14:19:14 Author Profile Mail author Edit |
Inertia. There is energy delivered during the power stroke which is stored in the flywheel which is part of the design. Thus duiroing the nonpower parts of the cycle the system rotates and expemnds part of the energy stored.
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Re: Need Help Understanding Diesel Cycle | |||
Re: #3789 -- zekeman | Post Reply | Top of thread | Forum |
Posted by: Rebecca Pierik ® 05/27/2005, 15:16:02 Author Profile Mail author Edit |
Thanks. I appreciate your responses. And I have one more question then:
What about the very first intake stroke and compression stroke (steps 1 and 2) before the flywheel is turning (when the vehicle moves from rest)? Thanks Again,
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Re: Need Help Understanding Diesel Cycle | |||
Re: Re: Need Help Understanding Diesel Cycle -- Rebecca Pierik | Post Reply | Top of thread | Forum |
Posted by: zekeman ® 05/27/2005, 23:50:08 Author Profile Mail author Edit |
Just like in your automobile, there is a starting motor that sets the cycle in motion. |
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