What is a car ignition coil assembly
The automotive ignition coil assembly is a core component of the engine ignition system, responsible for converting low-voltage electricity into high-voltage electricity to ignite the mixture in the cylinder and ensure the normal operation of the engine.
Structural composition
It is mainly composed of a low-voltage coil (primary coil), a high-voltage coil (secondary coil), an iron core, a switching transistor and auxiliary components. The low-voltage coil is wound with relatively thick enameled wire and is responsible for drawing power from the battery. The high-voltage coil is wound with fine enameled wire and generates high voltage through electromagnetic induction. The iron core stores magnetic field energy, and the switching transistor controls the on-off of the current to achieve energy conversion.
Functional principle
The low-voltage electricity of the vehicle (usually 12V) is converted into high-voltage electricity (about 15-30kV) through the principle of electromagnetic induction to provide ignition energy for the spark plugs. When the engine is running, the low-voltage coil stores energy, and the high-voltage coil releases high voltage at a specific moment, breaking through the spark plug gap and igniting the mixture.
Replacement Precautions
It is usually necessary to replace the entire set rather than individual components, as the components in the ignition coil assembly work together, and individual replacement may lead to matching issues or performance degradation. The replacement cycle is generally around 100,000 kilometers. It is necessary to regularly inspect the circuit joints and clean the carbon deposits on the spark plugs to extend their lifespan.
The core function of the automotive ignition coil assembly (commonly known as the "high-voltage pack") is to convert the low-voltage current (typically 12V) provided by the battery into a high-voltage current (typically 20,000-35000V) to drive the spark plugs to generate an electric spark to ignite the mixed gas in the engine cylinders, ensuring the normal operation of the engine.
Working principle
Based on the principle of electromagnetic induction, the magnetic field energy is stored in the primary coil and released to the secondary coil when the circuit is disconnected, generating high voltage that breaks through the spark plug gap and ignites the mixture.
Common fault manifestations
Youdaoplaceholder0 Engine shaking : Insufficient ignition energy leads to uneven combustion in the cylinders
Youdaoplaceholder0 Weak acceleration : Low combustion efficiency of the mixture affects power output
Youdaoplaceholder0 Increased fuel consumption : incomplete combustion leads to a decrease in fuel utilization rate
Faults in automotive ignition coil assemblies are usually caused by a combination of multiple factors. The following are the main causes and countermeasures:
Cause of malfunction
Youdaoplaceholder0 Component aging : The internal insulation layer of the ignition coil gradually fails due to the long-term influence of the thermal effect of the current, leading to coil breakdown.
Youdaoplaceholder0 Increased external load : If the spark plug gap is too large (exceeding the standard value by 0.3mm), it will force the coil to continuously output a higher voltage, accelerating component wear.
Youdaoplaceholder0 Manufacturing defects : Some batches of products have problems such as poor quality of insulating materials and unreasonable internal resistance, which directly affect the service life.
Youdaoplaceholder0 System abnormality : engine overheating (exceeding 100℃), power supply voltage fluctuation, high-voltage line open circuit or computer board program malfunction, etc., may all cause coil damage.
Typical symptoms
The engine is shaking violently and white smoke is coming out of the exhaust pipe
Abnormal fuel consumption (such as a sudden increase of more than 30%
The fault light is on and power is suddenly lost
Solution
Youdaoplaceholder0 Immediate repair : If any abnormality is found, check the spark plug gap, high-voltage wire and generator voltage in time. Replace the damaged parts if necessary.
Youdaoplaceholder0 Replace with genuine parts : Give priority to choosing original factory or certified ignition coils and avoid using inferior products.
Youdaoplaceholder0 Regular maintenance : Check the condition of the spark plugs every 20,000 kilometers and keep the engine cooling system working properly.
If the fault persists, it is recommended to contact a professional maintenance institution for a comprehensive inspection.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAXUS auto parts welcome to buy.
