25-01-2012, 04:38 PM
i want some ppt on camless engines which should consists of min of 25 slides
25-01-2012, 04:38 PM
i want some ppt on camless engines which should consists of min of 25 slides
11-02-2012, 11:56 AM
to get information about the topic camless engine full report ,ppt and related topic refer the link bellow
https://seminarproject.net/Thread-camles...ator--6644 https://seminarproject.net/Thread-camless-engine?page=3 https://seminarproject.net/Thread-camless-engine
15-08-2012, 10:41 PM
thank you for uploading that useful papers
05-07-2013, 02:50 PM
CAMLESS ENGINES CAMLESS ENGINES.ppt (Size: 2.55 MB / Downloads: 59) Introduction CAMS Control the breathing channels (valves) of an IC engine Connected to camshaft which is operated by crankshaft Cams push open valves at proper time & guide their closure But they are inflexible except VTEC & VVT-I Engineers could not vary timing, lift & duration of valve opening infinitely Working of conventional engines The crankshaft turns camshaft which operates valves by mechanism as in figure Spring brings back valve to initial position Timing of engine valves depends on shape of cams Conventional engine valves Engineers must design cams in the development stages This design compromises b/n engine power & fuel efficiency Considering this compromise automobile companies brought variable valve timing mechanisms But is effects were limited Actuators It is a electro-hydraulic camless valve train (ECV) Uses elastic property of compressed hydraulic fluid which acts like a liquid spring, accelerates & decelerates the valves Advantages Offers continuously variable & independent control of all aspects of valve motion - lift, operation duration, event of opening ECV system can control valve velocity, valve acceleration and deceleration Disadvantages Opening & closing of valves requires some power- Electromechanical- alternator Electrohydraulic- accumulator Sophisticated electronic control required for gentle seating of valves Current solenoids cannot run at high rpms; Hidden cost of microprocessor & software controls Conclusion Even though some disadvantages are present, we can expect electrohydraulic & electromechanical valves to replace the conventional camshaft technology. |
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