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:
Sep. 03, 1991
Filed:
Oct. 16, 1989
Charles H Tuckey, Cass City, MI (US);
James L Thompson, Cass City, MI (US);
Thomas M Hoover, Reese, MI (US);
Walbro Corporation, Cass City, MI (US);
Abstract
A fuel delivery system for an internal combustion engine that includes a fuel supply with a fuel pump responsive to application of electrical power for supplying fuel under pressure to fuel injectors mounted on the engine. A pressure sensor is coupled to the pump/injector fuel delivery line for measuring fuel delivery pressure. A second sensor is positioned within the fuel tank and is responsive to fuel alcohol concentration. The pump motor is energized by a pulsed d.c. signal having a duty cycle that varies as a combined function of the pressure and alcohol-concentration sensor output signals so as to maintain constant fuel pressure at the injectors while automatically compensating quantity of fuel delivered by the injectors for differing fuel alcohol concentrations.