Preheating plug for diesel engine, comprises cylindrical box fixed to cylinder head, cylindrical sleeve partly within the box and heating element supported by sleeve and made from a ceramic

摘要

The preheating plug has a cylindrical box (10) which is screwed into the cylinder head and has a conical airtight extremity (15). A cylindrical sleeve (20) has a thicker portion (25) brased or press fitted over at least 2mm to the inside of the box to make a seal and supports within a thinner portion (24) an electric heating element (30) made from a ceramic and configured as a rod Independent claims are also included for the following: Two different designs of preheating plug which use the same empirical rules developed for the first design but vary in detailed form