Thus, the fundamental part of the car engine is the cylinder, emptied into the block so that it is closed at its top. Inside the cylinder is a tightly adjusted piston or plunger that acts as a closing of the lower part of the cylinder, so that the combustion force is completely enclosed. At the same time, the piston has freedom to move down and up.
Each time combustion occurs, the piston is driven downwards, and its movement is transmitted by means of a connecting rod to a rotary crankshaft. The movement passes from it, and through the shift and transmission, to the wheel or drive wheels.
However, the top of the cylinder is not fully closed on all occasions. Two openings (sometimes four) allow fuel to enter and eject gases resulting from combustion.
These holes are opened and closed at appropriate intervals by valves whose movement is controlled by a camshaft, moved (indirectly) by the crankshaft. This ensures that the frequency with which fuel enters the cylinder is proportional to the engine speed. Another mechanism, the distributor, also moves at engine speed so that fuel loads are lit at exact intervals.
All motors of alternative motion need an external force to start: a starter, a pedal or, as in old cars, a crank. From that point on, the operation of the time machines and the two machines is somewhat different.
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Types of internal combustion engine
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