Variable flow fuel transfer pump system and method

US8844503B2 · kind B2 · utility

Assignee

• CUMMINS INTELLECTUAL PROPERTY, INC. · US

Inventors

• Joseph A. Worthington · Scipio, US
• Norman C. Blizard · Columbus, US
• David P. Genter · Columbus, US
• Gregory S. Franks · Edinburgh, US
• Michael F. Mattern · Columbus, US
• Thomas Hahn · Frankfurt am Main, DE
• James L. Walls · Morristown, US
• Edward Nathan Linen · Columbus, US

Key dates

• Filing date: Sep 23, 2011
• Grant date: Sep 30, 2014
• Expiry date: May 1, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/2058
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel supply system and method of controlling fuel flow through a supply system is provided including a variable flow, i.e. speed, electric fuel transfer pump and a control system adapted to variably control the transfer pump based on fuel demand of the engine. The system provides improved transient response by providing the transfer pump with a feed forward speed/flow command based on engine fueling demand determined based on engine operating conditions. The transfer pump is controlled based on fuel demand not necessarily achieved yet by the high pressure pump and injectors. Therefore, this system controls the EFTP substantially simultaneously with controlling the high pressure pump and injectors to optimize fuel flow through the entire system ensuring the minimum required fuel flow is passing through the second the fuel filtration system, hence maximizing steady state fuel filtration efficiency, and minimizing surge effects on filtration efficiency.