electrical system
DESCRIPTION
Electrical System. Intro to Automotives. Basics of Electricity. Definition: The movement of electrons in a conductor. Terms. Voltage: Is the electrical pressure that causes current to flow. Current: The quantity of electrons moving through a conductor. Resistance: - PowerPoint PPT PresentationTRANSCRIPT
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Intro to Automotives
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Basics of ElectricityDefinition:
The movement of electrons in a conductor.
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TermsVoltage:
Is the electrical pressure that causes current to flow.
Current:The quantity of electrons moving through a conductor.
Resistance:Is measured in ohms, usually the load, such as a light.
OHMS LAW:Voltage = Current X Resistance
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BatteryStores Chemical Energy
Supply electrical energy to the starter
Supplement the alternatorLightsRadioEtc.
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Key SwitchConnects or disconnects
electrical current from flowing.
Completes the circuit to the solenoid starter
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SolenoidElectrical Switch
Changes low current to high current
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StarterConverts electrical
energy into mechanical energy
Connected to the flywheel gears, which is connected to the crankshaft, which moves the pistons
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Neutral Safety Switch
Keeps vehicle from starting while in gear
Allows current to flow in starting system when in “PARK”
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Common Starting System Problems
Bad/Worn out starter or
solenoid
Dead Battery
Short circuited or broken wire
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Charging System•The reverse of the starting system
•Recharges the battery
•Energy Conversion
•Consists of four (4) main components
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Drive BeltConnects crankshaft to Alternator
Sometimes connected to…Power steering pumpWater pumpAir conditioning
2 types of belts…Serpentine“V”- belts
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Serpentine Belt
Multi-ribbed
Grooves run parallel
Replace every 50,000
miles
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V-beltsUsually narrow
Cross-section looks like a “V”
Replace every 25,000 miles
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Alternator
Converts mechanical energy to electric energy
Does both AC & DC
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BatteryStores Chemical Energy
12-volt DC
Converts electrical energy to chemical energy
Supplements the alternatorLightsRadioEtc.
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Voltage Regulator
Located in or near the alternator
Regulates the Voltage
Should be about 14.5 volts while the engine is running
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FusesLocated in the junction block
Rated in Amps 5,10, 15, etc…
2 types of fuzzesGlass CylinderBlade
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HeadlightsHeadlights
Sealed BeamComposite
HalogenFilled with gas
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Questions/Discussion…