Caterpillar Inc.

Matthew Robert Vanderveen

Dana Ray Coldren

Cory Andrew Brown

Glenn Brian Cox

Sana Mahmood

Michael Curtis Herr

Andrew Justin Wallis

A fuel injector includes an injector housing, an outlet check, an injection control valve assembly, and a valve seat orifice plate integrating a valve seat and various orifices for outlet check control. In the valve seat orifice plate a drain orifice extends between a valve seat surface and a check control chamber formed between a closing hydraulic surface of the outlet check and the valve seat orifice plate. First and second re-pressurization orifices extend between an outer surface of the valve seat orifice plate and the check control chamber.

Fuel injector having valve seat orifice plate with valve seat and drain and re-pressurization orifices

A fuel system includes a fuel injector having a split check assembly with a control piece, an outlet piece, and a check sleeve. A trapped volume is formed between the control piece and the outlet piece within the check sleeve, to hydraulically couple the control piece to the outlet piece. A starting rate shape clearance fluidly connects the trapped volume to a fuel cavity and is formed between the check sleeve and one of the control piece or outlet piece received therein, and modulates a starting rate shape of fuel injection from the fuel injector. Related methodology is disclosed.

Trapped volume split check assembly in fuel injector

Growing community of inventors

Gridley, IL, United States of America

Matthew Robert Vanderveen