Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)
Ask More Info Of  A Seminar Ask More Info Of A Project Post Reply  Follow us on Twitter
10-08-2012, 04:33 PM
Post: #1
Engine lubrication ppt
Engine lubrication


.docx  Engine lubrication.docx (Size: 22.7 KB / Downloads: 55)

Lubrication system

The engine lubrication system is designed to deliver clean oil at the correct temperature and pressure to every part of the engine. The oil is sucked out the sump into the pump, being the heart of the system, than forced through an oil filter and pressure feeded to the main bearings and to the oil pressure gauge. From the main bearings, the oil passes through feed-holes into drilled passages in the crankshaft and on to the big-end bearings of the connecting rod. The cylinder walls and piston-pin bearings are lubricated by oil fling dispersed by the rotating crankshaft. The excess being scraped off by the lower ring in the piston. A bleed or tributary from the main supply passage feeds each camshaft bearing. Another bleed supplies the timing chain or gears on the camshaft drive. The excess oil then drains back to the sump, where the heat is dispersed to the surrounding air.

Journal Bearings

If the crankshaft journals become worn the engine will have low oil pressure and throw oil all over the inside of the engine. The excessive splash will probably overwhelm the rings and cause the engine to use oil. Worn bearings surfaces can be restored by simply replacing the bearings inserts. In good maintained engines bearing wear occurs immediately after a cold start, because there’s little or no oil film between the bearing and shaft. At the moment that sufficient oil is circulated through the system hydrodynamic lubrication manifests and stop the progress of bearing wear.

Piston rings - cylinder

Piston rings provide a sliding seal preventing leakage of the fuel/air mixture and exhaust from the combustion chamber into the oil sump during compression and combustion. Secondly they keep oil in the sump from leaking into the combustion area, where it would be burned and lost. Most cars that "burn oil" and have to have a quart added every 1,000 miles are burning it because the rings no longer seal properly.

Between the piston rings and the cylinder wall of a well maintained engine hydrodynamic lubrication prevails, essential for the lowest friction and wear. In the top and bottom dead centre where the piston stops to redirect, the film thickness becomes minimal and mixed lubrication may exist.

To realize a good head transfer from the piston to the cylinder, an optimal sealing and a minimum of oil burning, a minimal film thickness is desirable. The film thickness is kept minimal by a so called oil control ring. This ring is situated beyond the piston rings so that the surplus of oil is directly scraped downwards to the sump. The oil film left on the cylinder wall by the passage of this ring is available to lubricate the following ring. This process is repeated for successive rings. On the up stroke the first compression ring is lubricated by the oil left behind on the cylinder wall during the down stroke.
Rating Engine lubrication ppt Options
Share Engine lubrication ppt To Your Friends :- Seminar Topics Bookmark
Post Reply 

Marked Categories : mechanical lubricant ppt, engine lubrication seminar, s i engine lubration ppt, lubrication system in ic engine ppt download, ppt of lubrication system, ppt for engine lubrication, ppt engine lubrication, functions of lubrication in engines ppt, engine lubrication ppt, lubrication in engine ppt, engine lubrication system powerpoint, di pietro s rotary piston engine journal, lubrication used in engines ppt, engin lubrication, engine lubrication seminar full report ppt, piston lubrication, seminar on lubrication in mechanical engeneering pdf, seminar on lubrication in mechanical engeneering, lubrication ppt, mechanical engineering seminar ppt download,

[-]
Quick Reply
Message
Type your reply to this message here.


Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Nano IC Engine seminar report project maker 0 211 09-10-2014 10:50 AM
Last Post: project maker
  SIX STROKE ENGINE SEMINAR REPORT seminar code 0 202 24-09-2014 09:47 AM
Last Post: seminar code
  Green Engine seminar report mechanical engineering 39 68,317 03-09-2014 07:12 PM
Last Post: Guest
  SIX STROKE ENGINE project maker 1 326 29-08-2014 08:22 AM
Last Post: mahadev bake
  Ball Piston Engine seminar report project maker 0 196 21-08-2014 03:54 PM
Last Post: project maker
  ASEMINAR REPORT ON CAMLESS ENGINE seminar code 0 241 14-08-2014 12:42 PM
Last Post: seminar code
  Green Engine seminar code 0 206 04-08-2014 12:32 PM
Last Post: seminar code
  PULSE DETONATION ENGINE project maker 0 161 28-07-2014 11:58 AM
Last Post: project maker
  STIRLING ENGINE seminar code 0 140 25-07-2014 01:58 PM
Last Post: seminar code
  DIESEL ENGINE NOX REDUCTION VIA NITROGEN-ENRICHED AIR seminar code 0 157 23-07-2014 03:26 PM
Last Post: seminar code
This Page May Contain What is Engine lubrication ppt And Latest Information/News About Engine lubrication ppt,If Not ...Use Search to get more info about Engine lubrication ppt Or Ask Here

Options: