Starting of the Swirl Chamber Diesel Engine with a Glow Plug

In the present paper, using a glow plug for a starting aid in the swirl chamber diesel engine, the authors observed the state of ignition at the starting by means of high-speed photography in order to determine the function of glow plug and to gain a key to its uses. As the result, the phenomena on starting with glow plug are able to be classified into the following three types, that is, (1) Ignition is mainly due to glow plug temperature. (2) First firing is dependent upon both glow plug and compressed air temperature. (3) Compressed air temperature most affects starting behavior.