Cummins Inc.

Xu Han

Alan C Anderson

Nicholas James Welch

Andrew Guy Kitchen

Daniel J O'Connor

Xiao Qin

William Marshall Cover

David Guillermo Gonzalez Medina

Jisang Sun

Benjamin L Olivas

Benjamín L Olivas

Daniel Guillermo Gonzalez Medina

Spark plugs are disclosed that include electrode arrangements to improve the charge flow into and out of the annular volume around the insulator nose and a pre-chamber volume of a pre-chamber device, thus directing a purge of exhaust gases trapped in the annular volume to a space formed by the exterior of the spark plug body and the interior of the pre-chamber device.

Spark plug configurations with electrode to direct charge flow for a combustion pre-chamber of an internal combustion engine

A combustion pre-chamber assembly includes pre-chamber device body defining an annular plenum that is in fluid communication with the at least one bore that extends through the spark plug shell. The annular plenum is also in communication with at least one purging passage that extends from the annular plenum to an end surface of the pre-chamber device body. Residual exhaust gases in the annular volume of the spark plug are purged by fresh charge flow from the main combustion chamber as the piston approaches top dead center. The fresh charge flow that is provided to the annular plenum through the at least one purging passage and into the annular volume of the spark plug through the at least one bore through the spark plug shell.

Combustion pre-chamber assemblies for an internal combustion engine

A combustion pre-chamber device for a spark ignition internal combustion engine is configured to engage a spark plug and be mounted to a cylinder head in communication with a combustion chamber of a cylinder of the engine. The combustion pre-chamber device includes any one or combination of a number of features to improve operating effectiveness, including extending the combustion operating range by improving cooling and optimizing the flow field inside the combustion pre-chamber device.

Combustion pre-chamber device for an internal combustion engine

A spark plug is disclosed that includes at least one bore extending through a shell of the spark plug in order to form a passageway between an annular volume around the spark plug insulator nose and a pre-chamber volume of a pre-chamber device, thus directing a purge of exhaust gases trapped in the annular volume to a space formed by the exterior of the spark plug body and the interior of the pre-chamber device.

Spark plug for an internal combustion engine having a combustion pre-chamber

Growing community of inventors

Columbus, IN, United States of America

Xu Han