Fuel injection system for internal-combustion engines

Details Fuel injection system for internal-combustion engines Fuel injection system for internal-combustion engines

1984-10-25

1987-07-07

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123446, 417462, F02M 4106

Patent

active

046779531

ABSTRACT:
A fuel injection system for internal combustion engines has a rotary valve device driven in synchronism with a cam shaft of the engine to distribute high-pressure fuel to unit injectors of the engine. The rotary valve device comprises a rotary spool having fuel supply port and a plurality of fuel metering grooves formed on the circumference of the spool. The fuel metering grooves are respectively provided with check valves. The rotary spool further comprises a pressure relief port for draining part of fuel accumulated in each of the unit injectors and a fuel supply pipe connected between the rotary valve device and the unit injector. The pressure relief port is formed on the circumference of the spool and between the fuel supply port and the fuel metering grooves.

REFERENCES:
patent: 1776861 (1930-07-01), Rathbum
patent: 2385089 (1945-09-01), Lerner
patent: 4200074 (1980-04-01), Kosuda et al.
patent: 4387686 (1983-06-01), Leblanc et al.
patent: 4407250 (1983-10-01), Eheim et al.
patent: 4440133 (1984-04-01), Gourde
patent: 4440134 (1984-04-01), Nakao et al.
patent: 4465049 (1984-08-01), Eckert et al.

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