This document is adapted from another PPT present in slide share.But this is little different from that one. In this presentation the mechanism of firing order is added.Hope you people like this. Thank you

1. V-12 ENGINE
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Branch- Mechanical
Section- A, Group-02
Reg No. - xxxxxxxxxxx

2. WHAT IS V-ENGINE
A V-engine or Vee engine is a common configuration
for an internal combustion engine where the
cylinders and pistons are aligned, in two separate
planes or 'banks', so that they appear to be in a "V"
when viewed along the axis of the crankshaft. The
Vee configuration generally reduces the overall
engine length, height and weight compared with an
equivalent inline configuration of an I.C Engine.

3. A V-12engine is a V engine with 12cylinders mounted
on the crankcase intwo banks of sixcylinders, usually
but not always at a 60° angle to each other, with all
12pistonsdriving a common crankshaft.

4. The firstV12 engine was used in 1912 in Packard’s "Double
Six", but before the World War IIthe engine was used in a lot of
luxury cars: Cadillac, Packard, Lincoln, Franklin, Rolls-Royce, and
Hispano-Suiza.

5. A V12 engine is a V engine with 12 cylinders mounted on the
crankcase in two of sixcylinders, usually but not always at a 60°angle
to each other, withall12pistonsdrivinga common crankshaft.
A V12 with two banks of six cylinders angled at 60°, 120° (with the
latter configuration usually referred to as a flat-12) from each other
has even firing with power pulses delivered twice as often per
revolutionasa straight-6.
Ina racing car, the rotating partscan be made much lighterand thus
more responsive, since there isno need to use counterweights on the
crankshaft asisneeded ina 90°V8and lessneed forthe inertialmassin
a flywheel to smooth out thepower delivery.

6. V
V-12
V-12
V-12

7. WHAT IS THE TERM STRAIGHT-6
IN V-12 ENGINES
-The straight-six engine or inline-six engine (often
abbreviated I6 or L6) is an
internal combustion engine with the cylinders
mounted in a straight line along
the crankcase with all the pistons driving a common
crankshaft..
-The straight-six layout is the simplest engine layout
that possesses both primary and secondary
mechanical engine balance.

8. V-12 ENGINE DIAGRAM

9. V- 12 BY LAMBORGHINI

10. FIRING ORDER OF V-12
Lamborghini 1st made the move to Formula One in 1989. The F1 vehicle
used an engine of rating 3.5L V-12. The firing order of that engine was
found to be 1–7–4–10–2–8–6–12–3–9–5–11.
But in the latest flagship model of Lamborghini Aventador LP 700-4 the
firing order was found to be 1–12–4–9–2–11–6–7–3–10–5–8. The main
reason for choosing this order is to gain Maximum power output. Since
when Aventador was released the V-12 engine is being upgraded
continuously from a rating of 530 kW ; 710 hp to 566 kW ; 759 hp.
There exists several other possible combination of piston in a firing
order. The most common firing order used by Ferrari and heavy duty
vehicles is 1-7-5-11-3-9-6-12-2-8-4-10 and 1-7-4-10-2-8-6-12-3-9-5-11.
Some other combinations or order used in differnet vehicles are below
1-4-9-8-5-2-11-10-3-6-7-12 And 1-12-5-8-3-10-6-7-2-11-4-9.

11. FIRING ORDER OF V-12
1–12–4–9–2–11–6–7–3–10–5–8
L–R–L–R–L–R–L–R–L–R–L–R
TYPE

12. FIRING ORDER OF V-12
1- 4- 9- 8- 5- 2- 11- 10- 3- 6- 7- 12
L-L-R-R-L-L-R-R-L-L-R-R
TYPE

13. V12enginesare orwereusedinforthefollowingpurposes:
Theywereonce usedinaviationindustry
Forroadcars
Inheavytrucks
InAutoRacing
InLarge DieselEngines
Tanks and other AFVs (Armoured fighting vehicles)

14. -The first V12 engines were used in aircraft.
-By the end of World War I, V12s were popular in the
newest and largest fighters and bombers and were
produced by companies such as Renault and
Sunbeam.
-Various U.S. companies produced the Liberty L-12;
the Curtiss NC Flying boats, including the four V12
engine poweredNC-4, the first aircraft to make
a transatlantic flight.

15. -In automobiles, V12 engines have not been common due to their
complexity and cost.
-They are used almost exclusively in expensive sports cars and luxury
cars as the power output of these engines are very high and the overall
engine dimensions and weight are less compared to straight or inline
engine.

16. -V12 engines used to be common in Formula One and
endurance racing. From 1965 to 1980, Ferrari,
Weslake, Honda, BRM, Maserati, Matra, Delahaye
,Peugeot, Delage , Alfa Romeo.
-Lamborghini and Tecno used 12-cylinder engines in
Formula One, either V12 or Flat-12, but the Ford
(Cosworth) V8 had a slightly better power-to-weight
ratio and less fuel consumption.
-During thesame era, V12 engines were Superior to
V8s in endurance racing, reduced vibrations giving
better reliability.

17. -V12 is a common configuration for large diesel
engines; most are available with differing numbers
of cylinders in V configuration to offer a range of
power ratings. Many diesel locomotives have V12
engines.
-Large V12 engines are also common in ships.
-These engines are commonly used especially in
cruise ships, which may have up to six such main
engines. In the past the largest medium-speed diesel
engine in the world.

18. The worlds smallest V12 engine was developed by Spanish engineer
Patelo spending more than 1200 hours transforming blocks of
aluminium, bronze and stainless steel. Into the intricate pasts needed
to build this amazing V12 engine. The tiny V12 engine is powered by
compressed air which is injected into the engine at 0.1kg/sq cm.

19. ADVANTAGES AND DISADVANTAGES
-Minimal Vibration: V12 engines are two straight-sixes matched
to a common crank. This means they’re inherently balanced at
any V angle.
-Smooth Power Delivery: The V12 has a piston firing every 60
degrees of crankshaft rotation, giving it one of the smoothest
power deliveries of any engine.
-Free Revving: Because the engine is naturally balanced, the
crankshaft can be made with minimal counterweight, reducing
rotational inertia.
Power: Small cylinders make high revs easier, and large
displacement means more air and fuel. Both of these factors
lead to big power numbers from V12 engines.
ADVANTAGES-

20. ADVANTAGES AND DISADVANTAGES
-Cost: As expected, this isn’t a cheap option.
-Complexity: With 12 pistons, and often 48 valves, the
number of moving parts lead to a complex engine.
-Size: Be sure to provide plenty of space to package
in a massive V12 in your engine bay.
-Weight: It’s a big heavy engine. Of course, you can
always spend more money on lighter materials.
DISADVANTAGES-

21. ANIMATIONS
A comparison between an inline 4-cylinder straight
engine vs. a 12 cylinder V-engine

22. THANK
YOU