By the way, there has been a demand for a spark plug equipped with an insulator that is further superior in withstand voltage characteristics and particularly further superior in withstand voltage characteristic
<div p-id="p-0001">A spark plug having an insulator formed of an alumina-based sintered material which contains an Si component and a rare earth element component that satisfy the following conditions
When a dielectric breakdown occurs between the center electrode 100 and the ground electrode 400 due to an increase in the voltage Vg, spark discharge occurs at the spark plug 20. When spark discharge shifts from capacitance discharge to inductive discharge, the voltage Vg and the current Ic ...
applied to a spark plug having an insulator made therefrom in a high temperature environment (e.g., about 700°C), the low-melting-point glass phase is softened, or the electric field is exclusively applied to the residual pores, possibly causing breakdown (penetration of spark) of the ...
<div p-id="p-0001">There is provided a method for controlling a plasma-jet spark plug in a four-stroke internal combustion engine, including the steps of: causing the spark plug to generate a primary
Such plasma jet ignition plug ignites an air-fuel mixture as follows. First, voltage is applied across a gap formed between the center electrode and the ground electrode, thereby generating spark discharge across the gap and thus causing dielectric breakdown in the gap. In this condition, electric...