What is the function of a car's ignition system?
1 Answers
The function of a car's ignition system is: in a gasoline engine, when the compression is near the top dead center, the combustible mixture is ignited by the spark plug, thereby burning and performing external work. For this reason, spark plugs are installed in the combustion chambers of gasoline engines. The purpose of the ignition system is to generate an electric spark with sufficient energy between the two electrodes of the spark plug in accordance with the working sequence of the cylinders. The voltage required for the spark plug electrodes to break down and produce a spark is called the breakdown voltage. The secondary voltage generated by the ignition system must be higher than the breakdown voltage to make the spark plug spark. The car ignition system is designed to ensure the normal operation of a spark-ignition engine by supplying the spark plugs with a high-voltage current (approximately 15,000 to 30,000 volts) in the correct firing order for each cylinder, enabling the spark plugs to produce a sufficiently strong spark to ignite the combustible mixture.