Imagine
a world without cars and automobiles. You would
have to travel by bicycles or the railways or
on animals.
Most cars made today have a petrol
burning engine, mounted in the front and a front-wheel
drive. The typical engine is an internal-combustion
engine, which works by burning a mixture of petrol
and air inside closed cylinders. When the car’s
ignition key is turned, electricity from the battery
causes pistons to move up and down inside the
engine’s cylinders. As the pistons move down,
intake valves above the cylinders open, and fuel
and air are sucked into the cylinders. The pistons
then move back up the cylinders, compressing the
fuel-air mixture. Electric sparks from the ignition
system’s spark plugs ignite the mixture, and the
engine starts to run as the pistons move rapidly.
Expansion of the burning gases forces the pistons
down, and these downstrokes provide the power
that moves the car. The piston’s downstrokes turn
the crankshaft. Power travels from the crankshaft
to the transmission and, finally, to the front
wheels. Burned gases escape as the exhaust valves
above the cylinders open and the pistons move
up, forcing the waste products out through the
silencer and exhaust pipe.
NOTE: 1896 was the year
of the car! The first motorist was fined for dpeeding,
the first car-hire firm began operating, the first
motor show, the first car theft, the first race
track event, the first motor magazine and the
first parking offence took place in this year. |