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Power-managed fuel delivery system

  • US 5,672,051 A
  • Filed: 07/12/1995
  • Issued: 09/30/1997
  • Est. Priority Date: 07/12/1995
  • Status: Expired due to Fees
First Claim
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1. A fuel delivery system for an internal combustion engine that comprises a fuel pump having a d.c. electrical motor for driving said pump at a speed that varies as a function of electrical power applied to said motor and circuit means for applying electrical power to said motor from a source of d.c. potential, characterized in that said circuit means includes means responsive to voltage level at said source of d.c. potential for automatically increasing electrical power applied to said motor from said source when voltage available at said source decreases to a preselected level, including a d.c.-to-d.c. converter having a transformer, rectifier means coupling said transformer to said motor and switch means for applying alternating current to said transformer when voltage available at said source of d.c. potential decreases to said preselected level, and means connecting said source of d.c. potential to said transformer such that said motor draws power from said source of d.c. potential through said transformer and said rectifier means during both operation and non-operation of said switch means.

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