Advantages of PHC Ignition Coil
PHC ignition coil covers wide ranges, almost covering 24 global car makers.PHC has various types of ignition coils. Around 120 parts no. can cover global car makers, especially Korean, Japanese car brands.Technically, compared with other products, PHC ignition coil has excellent corrosion-resistance and oil durability by sealing type.PHC ignition coil makes engine performance smooth and suppresses the noise.
- Number of parts no : + 120
- Type: spring type, cable type
- Range: Korean vehicle (HYUNDAI, KIA, CHEVROLET, SSANGYONG, RENAULT SAMSUNG),European vehicle (AUDI, BMW, BENZ, CITROEN, PORSCHE, PEUGEOT, ROLLS ROYCE, SEAT, SKODA, VW), Japanese vehicle(DAIHATSU, HONDA, LEXUS, MAZDA, MITSUBISHI, NISSAN, SUZUKI, TOYOTA), American vehicle(CHRYSLER, FORD)
Ignition Coil: Basic Principles
Ignition Coil Function
- The induction coil in an automobile's ignition system
- Transform the battery's low voltage into a high voltage
- Create an electric spark in the spark plugs to ignite the fuel
※ Ignition systems are not required for diesel engines which rely on compression to ignite the fuel/air mixture.
Ignition Coil Structure
- Iron core
- amplifying the magnetic field
- Primary winding
- made of coated copper wire and wound over the secondary winding
- Secondary winding
- made of insulated copper wire and placed around this iron core
- The electrical connections
- terminal 15 (voltage supply)
- terminal 1 (contact breaker)
- terminal 4 (high-voltage connection)
How Ignition Coil Works
- STEP 1
- The primary winding is first supplied with The battery current through The low-voltage connection of The ignition coil.
- STEP 2
- When The electrical circuit is closed, current flows through The primary winding and then, a magnetic field is generated.
- STEP 3
- a magnetic field is simultaneously formed around The primary winding.
- If this current flow is interrupted, The magnetic field collapses and then, it triggers a voltage pulse in The secondary winding.
- STEP 4
- The high-voltage pulse of an ignition coil arises in the secondary winding with the help of magnetic induction.
- STEP 5
- This voltage pulse passes through the ignition cable to the spark plug's spark gap and ignites the fuel-air mixture in a gasoline engine.
※ The primary winding is connected to the secondary winding and the primary current flowing through the primary winding is switched on and off via terminal 1.
※ The voltage pulse arising in the secondary winding is higher than the 12 volt battery voltage, which previously flowed through the primary winding.
Marking & Details on Ignition Coil
Ignition coil replacement sequence
1. Disconnect the cable and connector from the faulty Ignition Coil.Remove the screw and faulty Ignition Coil. Focus on it when connecting the Ignition Coil to the spark plug.isalignment can cause severe spark plug damage.
2. Install the new Ignition Coil into the plug hole of the cylinder head in the same orientation with the original sensor, in order to secure the connection to the spark plug terminal.Install the screw and connector.
3. Turn the engine on and check whether the ignition system works well.
Please check out the following safety measures:
- 1. Touch or remove ignition cables, the distributor cap, or the spark plug connectors after the engine is turned off
- 2. Connect or disconnect electronic control units, plug connections, and connection cables after the ignition is switched off.
- 3. Wash the engine when the engine stops and the ignition is switched off.
- 4. The voltage supply to the injection valves should be interrupted to protect the catalytic converter during all tests on the ignition system.
Checking The Ignition Coil
When checking ignition coils, start with the basics:
- 1. External checks for signs of HT leaks(tracking).
- Check for cracks to the insulating material.
- Check for corrosion to the terminals.
- 2. Internal checks for resistancesCheck primary and secondary windings.
- Check for the resistance between the two circuits.
- Compare the readings to the relevant data manuals.
- The above tests will show many faults, however, full testing is very difficult.
- Without specialist equipment it is difficult to get accurate results.
- Plus, testing the resistance won’t guarantee an ignition coil’s serviceability.
Symptoms of A Faulty Ignition Coil
A symptoms of the faults can be as follows:
- Engine does not start
- Vehicle misfires
- Poor acceleration / loss of power
- Engine warning lamp lights up
- Fault code is stored
- 1. Internal short circuits
- Symptom : Overheating of the old coil
- Cause : a faulty ignition module, a faulty output in The electronic control unit
- 2. Fault in the voltage supply
- Symptom : The coil charging time increases, Premature wear, Overload on the ignition control unit
- Cause : The voltage supply being too low
- 3. Mechanical damage
- Symptom : The ignition cable’s damage from marten bites
- Cause : A faulty valve cover gasket and Resulting engine oil leaks
- 4. Contact fault
- Symptom : Contact resistance in the wiring
- Cause : Humidity penetrating in the coil, Engine washing or the use of grit in winter