The optimum spark timing must be retarded for the engine operating with a rich mixture.
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The function of the ignition system is to _____________ the flame propagation process.
The total enthalpy required to cause the flame to be self sustaining and promote ignition, is given by the product of the surface area of the spherical flame and the enthalpy per unit area.
A spark can be caused by applying a sufficiently low voltage between two electrodes separated by a gap.
An ignition process obeys the law of ______________
The pressure, temperature and density of the mixture between the spark plug electrodes have a considerable influence on the __________ required to produce a spark.
If the spark energy exceeds 40 mJ and the duration is longer than 0.5 ms, reliable ignition is obtained.
If the resistance of the deposits on the spark plug electrodes is sufficiently high, the loss of electrical energy through these deposits may prevent the spark discharge.
As air is poor conductor of electricity an air gap in an electric circuit acts as a high _____________
A spark is produced to ignite a homogeneous air fuel mixture in the combustion chamber of an engine, it is called spark ignition system.
An ignition system should provide a good spark between the _____________ of the plugs at the correct timing.
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