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Glossary &acirc;€” WSU

# Glossary &acirc;€” WSU - Glossary WSU...

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Glossary Glossary of Terms A B C D E F G H I J K L M N O P Q R S T U V W X Y Z - A - ABS - Anti-lock Brake Systems. These systems are designed to help maintain vehicle control in heavy braking situations. They help maintain vehicle control by preventing the tires from skidding. This allows the driver to steer the vehicle instead of skidding out of control. AC - Alternating Current. This type of current changes it's polarity verses time. The current travels in one direction in a wire, then it stops, changes directions, and repeats the cycle. Amperes - Current is represented by the upper case letter I (I stands for Intensity) in electrical mathematical equations like "Ohm's Law". In 1881, to honor of French physicist Andre Marie Ampere (1775-1836), the measurement of the quantity of current is done with the units of Amperes; amps for short. Atom - Each element is in the form of an atom. An atom is comprised of three main particles. In the nucleus of the atom there are typically neutrons and protons. The nucleus is the center of the atom. Orbiting the nucleus are the electrons. Averaging Meter - Usually an inexpensive meter. This type of meter can measure AC voltage and current; however, it is only accurate when measuring a sine wave like in a wall socket. - B - Base Units - Base Units refers to numbers with units of measure that do not have a prefix; examples: 12 Volts, 2.5 Amps, and 75 Ohms. Examples of numbers with a unit of measure that has a prefix: 1.2 Mega-Ohms, 25 kilo-Volts, 124 milli-amps, etc. Battery - An automotive battery has 6 sets of positive and negative plates at 2.1V each. This means an automotive battery has a normal voltage of 12.6V. Batteries produce DC voltage. Batteries supply the current to run the vehicle's electrical systems. The alternator charges the battery. - C - Compound - A combination of different materials. Camshaft Position Sensor (CMP) - The CMP is used to synchronize the sequential fuel injection system on an engine. the CMP is also used to monitor camshaft timing on engines with variable cam timing. Conductor - A material that allows electrical current to pass through it with relative ease. The four best conductors of electrical current are 1. Silver, 2. Gold, 3. Copper, and at a distant 4th, Aluminum. Continuity - To have continuity indicates that the circuit is not open. Wire strands can break inside the wire's insulation. This type of open circuit cannot be seen but it can be detected with a DMM using the continuity setting. Crankshaft Position Sensor (CKP) - The CKP is used for a reference signal to trigger the ignition and fuel injection systems. the CKP is also used for engine misfire detection. Current - The movement of electrons from atom to atom. The measurement of the quantity of current is done with the unit of Amperage; Amps for short. The upper case letter A is used to represent Amperage on a Digital multimeter.

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