Variable Compression Ratio Engines
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
summer project pal
Active In SP

Posts: 308
Joined: Jan 2011
10-01-2011, 06:31 AM


The engines that are used now a days spot a constant compression ratio. It is economic for the compression ratio must decrease with the speed. But there is a practical difficulty for the engines to alter its compression ratio while in working. But there has been a break through, researchers have found out new ways by which the compression ratio can be altered. Thus comes a new breed of engines called the Variable Compression Ratio Engines. Volkswagen has come up with a production version too. In this type the head is held loose can change its gap with an increase in speed. Even though the engines spot a linear variation which is not desirable the engine delivers a comparatively lower consumption

.doc   Variable Compression Ratio Engines.doc (Size: 531.5 KB / Downloads: 302)
passwordConfusedeminar and presentationproject and implimentations

Variable compression ratio engines are those engines that have varied compression ratios at different engine speeds .used mostly in the diesel engine, these engines have high values of economy compared to the ordinary engines.
Compression ratio of an engine is the relative amount to which the volume available is compressed
It is given by the expression

This compression ratio that is available is to be high when the engine is working at low speeds.

When the speed is increased, the efficiency value is decreased .the requirement is a low compression ratio and that too by increasing the clearance volume.

Since the engine is running at low speeds at the first, the time availability is high, but when ever the speed increases the available time for combustion is less and hence the volume required is high.


Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  Small Gasoline Engines PPT seminar projects maker 0 413 19-09-2013, 04:57 PM
Last Post: seminar projects maker
  How do Fuel Cells Compare to Internal Combustion Engines and Batteries? seminar projects maker 0 514 14-09-2013, 04:18 PM
Last Post: seminar projects maker
  Conductively Cooled Superconducting Magnet System with Variable Temperature Insert seminar projects maker 0 401 11-09-2013, 04:13 PM
Last Post: seminar projects maker
  Combustion Engines ppt study tips 0 599 30-08-2013, 04:32 PM
Last Post: study tips
  Advantages and Disadvantages of Jet Engines study tips 0 410 10-08-2013, 02:09 PM
Last Post: study tips
  Hydrogen Internal Combustion Engines ppt study tips 0 628 31-07-2013, 04:48 PM
Last Post: study tips
Bug Bio-Gas As Alternative Fuel In IC Engines Computer Science Clay 11 12,474 19-07-2013, 05:44 PM
Last Post: Guest
  VALVE TIMING DIAGRAM OF FOUR STROKE ENGINES PPT study tips 2 1,301 08-07-2013, 09:47 AM
Last Post: study tips
  Experimental Compression – Resorption Heat Pump For Industrial Applications report study tips 0 417 03-07-2013, 04:48 PM
Last Post: study tips
  CAI ENGINES PPT study tips 0 450 01-07-2013, 04:13 PM
Last Post: study tips