Pressure-responsive fuel delivery system

Details Pressure-responsive fuel delivery system Pressure-responsive fuel delivery system

1989-10-16

1991-09-03

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123494, 123 1A, F02M 3704

Patent

active

050443445

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.

REFERENCES:
patent: 3935851 (1976-02-01), Wright
patent: 4248194 (1981-02-01), Drutchas
patent: 4369736 (1983-01-01), Ito
patent: 4495930 (1985-01-01), Nakajima
patent: 4501253 (1985-02-01), Gerstmann
patent: 4594968 (1986-06-01), Degobert
patent: 4706630 (1987-11-01), Wineland
patent: 4756291 (1988-07-01), Cummins
patent: 4770129 (1988-09-01), Miyata
patent: 4800859 (1989-01-01), Sagisaka
patent: 4905655 (1990-03-01), Maekawa

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