Re: Benefits of higher compression?.

Posted by buickanddeere on June 26, 2004 at 20:40:03 from (64.10.41.174):

In Reply to: Benefits of higher compression?. posted by Jonathan on June 26, 2004 at 08:32:41:

Bob M and Neil have the compression ratio info down as well as anyone there.
More CR lets the engine (a mechanical device) extract more energy from a unit of fuel by increasing the expansion ratio. It's why the later steam engines were "compound" with a 2nd larger cylinder on the exhaust of the primary cylinder.
Extreme spark ignition compression ratios allow the exhaust valve to be opened early to improve cylinder purging/breathing without losing power on the power stroke. And having more fresh airful mixture in the combustion chamber with less exhaust residue.
Combustion and steam turbines can be very efficient due to thier expansion ratios being many time more than a reciprocating engine. On large ships a steam turbine was aften attached to the exhaust of the multistage piston engine to wring the last bit of heat/pressure from the steam.

Follow Ups:

Post a Followup Name: E-Mail: Subject: Re: Re: Benefits of higher compression?. Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]