Sunday, 14 February 2016

Principle of startinG sYstem..

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Wednesday, 10 February 2016


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Fuses

When an electrical component stops working the fault may be in the component, in the electrical circuit or in thefuse that protects them. Because the fuse is a likely cause, and the easiest to check, look at it first.
The fuses are usually grouped in a box or on a panel with a cover. Ideally, the box should be fixed in an accessible place — such as the bulkhead under the bonnet.
Often, however, it is hidden away, perhaps under thedashboard or down in the front knee-well.
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Automotive Relays and How They Work

Automotive relays of all shapes and sizes can be found in just about every car, truck, and even boats.  Relays in general are used to enable a low amperage circuit to switch on or off a higher amperage circuit, like turning on your headlights.  If you were to try and directly hook up your headlights to the headlight switch you would exceed the amperage rating of the switch, melt wires, and risk an electrical fire. Relays are also used to switch multiple things at the same time using one output. A single output connected to multiple relays will allow you to open continuity and/or close continuity simultaneously, for example turning on your radio while the antenna extends. This article will cover some of the parts and characteristics of the automotive relay and some of the considerations taken with there design and use.
Automotive Relay Circuit Design
Most automotive relays that you will see are either Single-Pole, Single-Throw (SPST) or Single-Pole, Double-Throw (SPDT) and draw very little current (less than 200 milliamps). They have either normally closed or normally open contacts that will handle up to 30 or 40 amps and operate using a control circuit that has the coil and a load circuit which has the switch. When power is applied to the coil, a magnetic field is created which either opens or closes the switch. The diagrams below illustrate how this works.
photo1 photo2
(http://en.wikipedia.org/wiki/Relay)  (Craig Ueltzan 1999)
photo3

The Snubber
Once the power is disconnected from the relay and the magnetic field collapses across the coil, a voltage spike of several hundred volts in the reverse direction of normal current flow occurs. Because automotive relays are often controlled by electronic circuits that are sensitive to voltage spikes, this reverse voltage must be controlled and dissipated.  Most commonly either a resistor or a diode is placed across the coil of the automotive relay to do this. The diode or resistor is often referred to as a snubber
Diode Snubbers
As we know from our article about the diode, a reverse biased direction does not allow current to flow through a diode, so when voltage direction is normal, no current flows through the diode, but when this reverse voltage occurs,the diode becomes forward biased and excess voltage is allowed to pass through the completed circuit to the other end of the coil. This current flows around in the diode and coil circuit until the voltage is dissipated.
Resistor Snubbers
Resistor snubbers work by allowing only a certain amount of current to flow though the resistor during a voltage spike. According to allaboutcircuits.com, “Resistor-Capacitor snubbers have been used in automobiles for years on engine ignition systems, minimizing the arcing across the switch contact "points" in the distributor with a small capacitor called acondenser. As any mechanic can tell you, the service life of the distributor's ‘points’ is directly related to how well the condenser is functioning.”
Life Expectancy
Automotive relays will also fail after a time. Some are even rated by the number of times they will close a circuit before burning out (common relays are usually rated to 100,000 operations). Fortunately ISO automotive relays have been standardized, so many manufacturers make the same style relay making them much less expensive to replace than a switch.
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Friday, 22 January 2016

Amazing Car

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Tuesday, 19 January 2016

 Car A/C System






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https://www.facebook.com/groups/858296174269078/
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ChecK thiS On FaceBook

https://www.facebook.com/groups/858296174269078/


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Monday, 18 January 2016

Video Of Dwell Angel IgnitiOn system

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Fuses and circuit Breaker

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Battery Video

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Car Lighting System Video

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ALL Parts Name Of Vehicle From Sohail Abbas

Body and main parts[edit]

Body components, including windows and trim:

Doors[edit]

Windows[edit]

Electrical and electronics[edit]

See also: 42-volt electrical system

Audio/video devices[edit]

Car Video Accessories[edit]

Charging system[edit]

  • Alternator
    • Alternator bearing
    • Alternator bracket
    • Alternator fan
    • Other alternator parts

Electrical supply system[edit]

  • Battery
    • Performance battery
    • Battery box
    • Battery cable terminal
    • Battery cable
    • Battery control system
    • Battery plate
    • Battery tray
  • Voltage regulator

Gauges and meters[edit]

Ignition electronic system[edit]

Lighting and signaling system[edit]

Main article: Automotive lighting

Sensors[edit]

  • Airbag sensors
  • Automatic transmission speed sensor
  • Camshaft position sensor
  • Coolant temperature sensor
  • Crankshaft position sensor
  • Fuel level sensor
  • Fuel Pressure sensor
  • Knock sensor
  • Light sensor
  • Oil level sensor
  • Oil pressure sensor
  • O2 sensor
  • Mass flow sensor

Starting system[edit]

Switches[edit]

  • Battery
  • Door switch
  • Ignition switch
  • Power window switch
  • Steering column switch
  • Switch cover
  • Switch panel
  • Thermostat
  • Frame switch
  • Parts and functions of starter system

Wiring harnesses[edit]

(wiring loom or cable loom)
  • Air conditioning harness
  • Engine compartment harness
  • Interior harness
  • Main harness
  • floor harness
  • control harness

Miscellaneous[edit]

Interior[edit]

Floor components and parts[edit]

Other components[edit]

Car seat[edit]

Powertrain and chassis[edit]

See also: frame (vehicle)

Braking system

Engine components and parts[edit]

Engine cooling system[edit]

Engine oil system[edit]

Exhaust system[edit]

See also: exhaust gas recirculation

Fuel supply system[edit]

Suspension and steering systems[edit]

Transmission system[edit]

  • Adjustable pedal
  • Axle shaft
  • Bell housing
  • Universal joint
  • Other belts
  • Carrier assembly
  • Chain wheel and sprocket
  • Clutch assembly
  • Clutch cable
  • Clutch disk
  • Clutch fan
  • Clutch fork
  • Clutch hose
  • Clutch lever
  • Clutch lining
    • Clutch pedal
    • Clutch pressure plate
    • Clutch shoe
    • Clutch spring
  • Differential
    • Differential case
      • Pinion bearing
      • Differential clutch
      • Spider gears
      • Differential casing
    • Differential flange
    • Differential gear
    • Differential seal
  • Flywheel
    • Flywheel ring gear
  • Gear
    • Gear coupling
    • Gear pump
    • Gear ring
    • Gear stick (gearstick, gear lever, selection lever, shift stick, gear shifter)
  • Gearbox
  • Idler gear
  • Knuckle
  • Master cylinder
  • Output shaft
  • Pinion
  • Planetary gear set
  • Prop shaft (drive shaft, propeller shaft)
  • Shift cable
  • Shift fork
  • Shift knob
  • Shift lever
  • Slave cylinder
  • Speed reducer
  • Speedometer gear
  • Steering gear
  • Torque converter
  • Transaxle housing
  • Transfer case
  • Transmission gear
  • Transmission pan
  • Transmission seal and bonded piston
  • Transmission spring
  • Transmission yolk
  • Universal joint (UJ, cardan joint)

Miscellaneous auto parts[edit]

Air conditioning system (A/C)[edit]

  • A/C clutch
  • A/C compressor
  • A/C condenser
  • A/C hose
  • A/C kit
  • A/C relay
  • A/C valve
  • A/C expansion valve
  • A/C low-pressure valve
  • A/C schrader valve
  • A/C INNER PLATE
  • A/C COOLER
  • A/C Evaporator

Bearings[edit]

  • Grooved ball bearing
  • Needle bearing
  • Roller bearing
  • Sleeve bearing

Hose[edit]

  • Fuel vapour hose
  • Reinforced hose (high-pressure hose)
  • Non-reinforced hose
  • Washer hose

Other miscellaneous parts[edit]

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