The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2013
Filed:
Jun. 29, 2010
Dana R. Coldren, Secor, IL (US);
Eric L. Rogers, El Paso, IL (US);
Fergal M. O'shea, Washington, IL (US);
Lifeng Wang, Dunlap, IL (US);
Mandar A. Joshi, Dunlap, IL (US);
Dana R. Coldren, Secor, IL (US);
Eric L. Rogers, El Paso, IL (US);
Fergal M. O'Shea, Washington, IL (US);
Lifeng Wang, Dunlap, IL (US);
Mandar A. Joshi, Dunlap, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
Various fuel injection systems and fuel injectors are disclosed that provide varying cooling rates for fuel injectors connected in series to fuel supply and drain rail. The local cooling rate for each injector is manipulated to balance the heat flux or heat transfer across the injectors disposed along the rail. The cooling rates may be manipulated by varying sizes of openings or slots in the nozzle case, by varying annular spaces disposed between the nozzle case and the portion of the injector body that houses the actuator and solenoid assembly, and by varying the size of annular spaces disposed between the nozzle case and the cylinder head. Strategic placement of slots in the nozzle case that direct more flow at the portion of the injector body that houses the actuator and solenoid assembly may also be employed. As a result, the operating temperatures of fuel injectors connected in series to a fuel rail can be manipulated and moderated so the downstream injectors are not prone to overheating.