WANKEL ENGINE

WANKEL ENGINE
The Wankel engine is a type of internal combustion engine, invented by Felix Wankel, using rotors instead of pistons of reciprocating engines.
Wankel conceived his rotary engine in 1924 and obtained a patent in 1929 During the 1940s he devoted himself to improving the design. In the 1950s and 1960s great efforts to develop Wankel rotary engines were made. They were especiallyinteresting for function smoothly and quietly, with few faults, thanks to the simplicity of its design.
OPERATION
A rotary or Wankel engine, named after its creator Felix Wankel,
is an internal combustion engine that works in a way completely
diferiense reciprocating engines.
In a reciprocating engine, is performed on 4 different -Admission
operations within a chamber, compression, combustion andExhaust.
In a Wankel engine is 4-stroke develop the same but in different areas
of the stator or block, with the piston moving without arrests one time to
another. More specifically, the casing is shaped cavity 8, within which lies
a triangular lobe or triangle rotor executes a variable rotation center.
The piston transmits its rotary motion to a shaft cigüeñalque is within,
and rotates as asingle center.
Like a piston engine, the rotary uses pressure produced by the combustion of the air-fuel mixture. The difference is that the pressure in the chamber is formed by part of the housing or stator and closed by one side of the triangular rotor, which in this type of motor replacing the pistons.
The rotor follows a path in which it maintains its 3 vertices in contact with the "stator"or "epitrochoid" delimiting three separate mixing compartments. As the rotor turns within the chamber, each of the three volumes it alternately expands and contracts; It is this expansion-contraction which sucks air and fuel to the engine, compressing the mixture, and then extracted suenergía expansive expels exhaust gases burnt.
ADVANTAGE
Fewer moving parts, the Wankel engine has fewer movingparts than a conventional engine, only 4 pieces; block, rotor (which in turn is formed by segments and strips), drive shaft and cooling / lubrication (similar to riding piston engines). This contributes to greater reliability.
• Quiet operation: All parts of a rotating motor rotates in the same direction, rather than suffer the constant variations of meaning that is subject to a piston. They areinternally balanced with spinning counterweights to eliminate any vibration. Even the power delivery develops more gradually, since each combustion stage is 90 ° of rotation of the rotor and in turn as each turn of the rotor is 3 turns the shaft, is each combustion 270 ° of shaft rotation, is say, three quarters of each lap; Compared with a single cylinder engine in which combustion takes placeduring each 180 ° of each two revolutions, that is 1/4 of each revolution of the crankshaft: combustion occurs each rotor 120 and shaft 360. A two-rotor Wankel engine in uniform torque equivalent to 6 alternate cylinders.
• Low rotation speed: Since the rotors spin at one third the speed of the shaft and to touching the stator, main engine parts move more slowly than a conventional engine,increasing reliability, once resolved initial problems in choosing the right materials, the segments are always moving relative to the fixed parts, no dead spots as reciprocating engines, and precisely in those dead spots where the absence of a part relative velocity with respect to another no lubrication (see tribology) higher wear occurs.
• Less vibrations: Since internal engine inertia are very small(there is no crank, or flywheel, or piston travel or movement), small vibration occurs only in the eccentric.
• Less weight: due to fewer parts that make up the engine compared to the piston and since usually engines two or three rotors of 600 cc or 700 cc each, aid is constructed to achieve a lower final weight of the .
DRAWBACKS
Emissions: is more difficult (though not impossible) to meet...