Dual pressure on demand automotive fuel pump

Details Dual pressure on demand automotive fuel pump Dual pressure on demand automotive fuel pump

2007-09-04

2007-09-04

Miller, Carl S. (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S041310

Reexamination Certificate

active

10662864

ABSTRACT:
An internal combustion engine (14) has an associated controller (18) controlling operation of the engine. A fuel pump (10) delivers fuel to the engine at more than one pressure (300 kPa, 800 kPa). The fuel pump includes a fuel inlet (34) and a fuel outlet (68). It also includes a motor (38) and pump assembly (36) for drawing fuel through the inlet into the fuel pump and delivering fuel to the outlet at a pressure higher than the pressure at the inlet. An outlet assembly (40) of the pump includes an outlet pressure sensor (76) and a processor (79) which is responsive to an input from the controller to vary the outlet fuel pressure by controlling the speed of the motor.

REFERENCES:
patent: 4756291 (1988-07-01), Cummins et al.
patent: 4763611 (1988-08-01), Kobayashi et al.
patent: 4789308 (1988-12-01), Tuckey
patent: 4811709 (1989-03-01), Braun et al.
patent: 4904162 (1990-02-01), Suzuki et al.
patent: 4919102 (1990-04-01), Iwabuchi
patent: 5593287 (1997-01-01), Sadakata et al.
patent: 5961293 (1999-10-01), Clemmons et al.
patent: 6652249 (2003-11-01), Kenney et al.

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