Auto Parts - I
An ignition circuit is made up of two sub-circuits:
the primary, which carries low voltage; and the secondary, which carries
high voltage. The primary circuit is controlled by the ignition key. It
releases 12 volts of electricity from the battery or alternator through the
coil to a set of breaker points in the lower part of the distributor, or to
the relay in electronic ignition applications. When the points or relay are
closed, current flows through the chassis back to the battery, completing
the circuit. When the points or relay are open, the flow stops, causing a
high-voltage surge to pass from the coil through a rotor in the top of the
distributor to the spark plugs. Once the car has started, the voltage
regulator protects the battery from being overcharged by the alternator.
part of the low -voltage current is absorbed by the condenser when the
points are open.
These are small gears which are not directly linked to
anything. Idle gears are used to reduce or increase rotation speeds, and
reverse directions of rotation. The center gear would be considered an idle
gear, if three gears are connected in a string.
This is the pointer on your gauge that shows you
the gauge's current reading. Its examples are those found in your
speedometer, temperature gauge, tachometer and oil pressure gauge.
The first stroke is called the intake stroke. The
piston moves down the cylinder, creating a partial vacuum in the cylinder. A
mixture of air and fuel is then forced through the inlet valve into the
cylinder by atmospheric pressure, now greater than the pressure in the
cylinder. The exhaust valve stays closed during the stroke.