How VVTi engine works?
106094
VVTi means variable valve timing.  A pressure-operated cam can advance or retard the camshaft angle with respect to the crankshaft angle.  It can give better power at high rpm and be adjusted for more torque at low rpm, and in the end it saves fuel and gives you more power per engine cubic inch.  Some engines only vary the exhast cam, others vary both cams (intake AND exhaust), but they are more expensive than the exhuast-only systems, and more common.
821342
THe VdW equation is P= nRT/(V-nb) - a(n/V)^2, just plug and chug.  But dont forget to switch your T into Kalvin
21140
OK, the answer to this one could easily be a book (actually, see the references because it _is_ a book or several). I'll give a very cursory overview of what the VGA is capable of.\n\nThe Video Graphics Array is a standard established by IBM to provide higher pixel addressability, colour graphics than are available with EGA. In fact, VGA is a superset of EGA, incorporating all EGA modes.\n\nThe VGA consists of seven sub-systems, including: graphics controller, display memory, serializer, attribute controller, sequencer and CRT controller. Basically, the CPU performs most of the work, feeding pixel and text information to the VGA.\n\nGraphics Controller: Can perform logical functions on data being written to display memory.\n\nDisplay Memory: A bank of 256k DRAM divided into 4 64k colour planes. It is used to store screen display data.\n\nSerializer: Takes display data from the display memory and converts it to a serial bitstream which is sent to the attribute controller.\n\nAttribute Controller: Contains the colour LUT (Look Up Table) which determines what colour will be displayed for a given pixel value in display memory.\n\nSequencer: Controls timing of the board and enables/disables colour planes.\n\nCRT Controller: Generates syncing and blanking signals to control the monitor display.\n\nIt is beyond the scope of this FAQ to describe the functionality of these components in detail, so for further reading consult Sutty & Blair (see References).\n\nVGA provides very low-level graphics commands. This, combined with the fact that a VGA card has a frame buffer but no real processing power, means that the PC's CPU has to do most of the graphics number crunching. As a result, the VGA speed of a given computer is highly dependent on the CPU speed, and the two cannot be uncoupled. Basically this renders VGA speed comparisons between video cards installed in systems which use different processors meaningless. Also, the VGA performance of a video card _can not_ be used to estimate how fast that card will be in another video mode (i.e. SVGA, Windows 3.1, etc).\n\nVGA is really an outdated standard, but in fact, all PC's today boot in VGA text mode 7 (see table below) and there is no indication that this will change in the near future. Most DOS games still use it because of its universality. While most GUI users think that 800x600 is a minimum pixel addressability, most DOS games only use a 320x200 pixel mode. Now, a number of SVGA games (640x480 with >16 colours or higher resolutions) are being released. However, the larger number of pixels which are being displayed require a faster processor and sometimes even a fast Pentium can appear sluggish.\n\nThe VGA modes are:\n\nMode    Type    Resolution      Chars   Colours \n(Hex)\n0,1     text    360x400         40x25   16\n2,3     text    720x400         80x25   16\n4,5     gfx     320x200         40x25   4\n6       gfx     640x200         80x25   2\n7       text    720x400         80x25   mono\nD       gfx     320x200         40x25   16\nE       gfx     640x200         80x25   16\nF       gfx     640x350         80x25   mono\n10      gfx     640x350         80x25   16\n11      gfx     640x480         80x30   2\n12      gfx     640x480         80x30   16\n13      gfx     320x200         40x25   256\n\nThe next 'standard' (and hopefully it will be widely adopted), is VESA SVGA, and provides standard SVGA modes (pixel addressabilities & colour depths), registers and refresh rate
678426
this will explain it\nhttp://www.daniweb.com/techtalkforums/showpost.php?p=75196&postcount=43
195741
Electronic fuel injection uses a system of sensors to measure fuel dosage and squirt atomized fuel into the intake of an engine through a system of injectors.\n\nThe main sensors needed to control an engine are intake air mass, throttle position, and engine speed.  Additional sensors that improve operation include oxygen sensor in the exhause (also called a lambda sensor) to make fine adjustments to avoid running rich and knock sensors in the head to avoid running lean.  There are many different types of systems, but most use those sensors.  One system I worked with, which was an unusual setup intended for a race car built in the late 80s used a manifold air pressure and manifold air temperature instead of an air mass sensor, since air mass can be calculated from temperature, pressure, and engine speed, in theory, at least.  In actual use, it was a very unstable system.  Some more modern systems use direct injection into the cylinder, but most inject into the intake manifold right above the intake valve.  Some systems  inject into the throttle body with a limited number of injectors, but most use a metod called sequential multi-port injection in which injectors are above the intake ports, and timed to intake valve opening.   \n\nThe basic method of operation is that if you know the amount of air going in, the speed of the engine, and the position of the throttle, an enrichment map stored on a computer chip can be used to provide the correct fuel dosage for those operating conditions.  The injectors are plugged into a set of fuel lines held at a constant pressure, and the rate of fuel passing through the injector at that pressure is known, so by keeping the injector open for a given period of time provides a known mount of fuel to each injector.  Special case enrichment, like in the case of a turbocharged engine where fuel consumption per cylinder firing can be highly varaible depending on boost level, the injector can be held open longer, or a second injector can be used for on-boost enrichment, depending on the design.
535320
see this site :\n\nhttp://science.howstuffworks.com/vdg.htm\nhttp://science.howstuffworks.com/vdg2.htm
425562
you can see here what kind of software it is, and where you got it from.\n\nhttp://www.viewpoint.com/installer/v4/html/vmp_faq.html#q4
1053653
Try googling for:\nAnti-vir\nAvast!\nClamwin\nAVG
348009
CVVT= Constantly variable valve timing.  In a normal engine the valves that let fuel and air into the engine work by a camshaft, each lobe is shaped like this <) and the camshaft pushes the valves open and lets the valves close.  The camshaft is run off a pulley which is attached to the crankshaft via a belt (cambelt) or chain (you guessed it camchain) With a CVVT engine the valves open at diferent rates  ie they can stay open longer, shorter, or wider, depending on how you drive the car (if you thrash it you will cause the valves to open more to allow more fuel and air into the engine and get the exhause gasses out ASAP) As for a DHOC i think you mean DOHC Double overhead cam, going back to the normal engine i mentioned earlier, it just means that you hae 2 camshafts instead of one, engines like this usualy have 16 valves and more, letting in more air/fuel and letting out exhaust gasses quicker making an improvement in economy and performance.  PHEW, if that doesent deserve 10 points then I dont know what does!!!
23108
The number denotes the number of cylinders. The "V" means that the cylinders are arrayed in 2 banks, usually at an angle of 90 degrees to one another, though the angle can be narrower (say, 60 degrees). A V8 has 4 cylinders in each bank, and 6 in the case of a V12. With 8 cylinders, a cylinder fires every forty-five degrees of crankshaft turn (360/8). In a V12, 1 cylinder fires with every 30 degrees of turn. (Crankshaft is what the pistons are connected to; the up and down motion of the pistons is converted to spinning by the crankshaft). The reason why a V12 of equal size (say, 5 liters) as a V8 generates more power is that cylinders are firing more frequently (30 versus 45 degrees). Thus, there is less 'coasting' in the crankshaft. V12's have a distinctive engine note, as do V8's. V12's are, of course, rarer, and the higher complexity and size mean that they are restricted to supercars and highest-end Mercedes and BMWs: both companies offer 6.0 liter V-12's generating in excess of 450 horsepower.
756080
a=(delta V)/(delta t)\n\ndelta V = V_final - V_initial = 0 - 3.2\ndelta t = 0.01 sec\n\na=3.2/0.01=320 m/s2\n\nforce=mxa=0.084x320=26.88 N
152380
This is a great place, to start..\nhttp://msdn.microsoft.com/vstudio/express/visualC/default.aspx
194412
go to http://en.wikipedia.org/wiki/Wankel_engine#How_it_works
471626
What isn't important? Think about it, the internal combustion engine completely revolutionized the world.  Without it, nothing would be the same.  \n\nI guess if I had to make a list I would start with the fuel lines, with out fuel nothing will take place.\n\nCarbeurator is next, controlling the input of air and fuel.\n\nThe heads, pistons, spark plugs, and exhaust manifolds are pretty important too.  The pistons compress the fuel, it is then ignited by the spark plug.  The resulting gas exits the exhaust manifold and out the tail pipe.\n\nThe cam or crank shaft spins in an orderly fashion to move the pistons in the correct sequence.  The distributor makes sure that the spark plugs fire at the proper time.\n\nI could go on forever.  Basically, the engine doesn't work properly if all parts aren't working.  I guess that means everything is important about a gas engine.
608544
http://dhvrm.blogspot.com/2006/04/video-help.html
596792
Jet engines work on Newton's 3rd law. Throw sometihng back with a certain force and you will be propelled by that same force.\n\nNow, by continuity eqn, Av = A'v'\n\nIf you throw something out of a small area at a high velocity, the rate of flow in the opposite direction is then proportional.
604852
Here are a couple of web sites that approach this in different ways. \n\nhttp://www.circletrack.com/techarticles/84199/\n\nhttp://www.diracdelta.co.uk/science/source/e/n/engine%20excitation%20mechanisms/source.html\n\nHope these help.