Caterpillar Inc.
Pre-Chamber Spark Plug

Abstract:

A spark plug for an internal combustion engine includes a body that includes a terminal post, a central electrode, and a mounting sleeve that includes a threaded portion. A precombustion cavity is defined within the body. A free end of the central electrode extends into the precombustion cavity, and a plurality of posts is disposed through the mounting sleeve at the threaded portion, each of the plurality of posts protruding at least partially into the chamber by a predetermined distance (d). An electrode having one or more limbs is connected to the free end of the central electrode. A cap is disposed to close an open end of the precombustion cavity.