Fluid injector with auxiliary filling orifice

US8505514B2 · kind B2 · utility

Assignee

• Caterpillar Inc. · US

Inventors

• Dianqi Fang · Dunlap, US
• Lin Zhang · Tongxiang, CN
• Stephen R. Lewis · Reading, US
• Zhenlong Xu · Peoria, US
• Avinash R. Manubolu · Albion, US
• Shriprasad Lakhapati · Peoria, US
• Christopher D. Hanson · Arvada, US

Key dates

• Filing date: Mar 9, 2010
• Grant date: Aug 13, 2013
• Expiry date: Dec 4, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M63/0036
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A common rail single fluid injection system including fuel injectors with the ability to produce multiple injection rate shapes. This is accomplished by including auxiliary filling orifices which selectively provide pressurized fluid to the check needle control chamber during injection events. In so doing, the speed and movement of the check needle is manipulated and differing injection rates may be achieved.