Rotary valve assembly for boosting type fuel injection

Details Rotary valve assembly for boosting type fuel injection Rotary valve assembly for boosting type fuel injection

1987-03-30

1988-09-13

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Fuel injection system

123450, 123467, 417462, F02M 3900

Patent

active

047701455

ABSTRACT:
A rotary valve assembly for fuel injectors which can effectively prevent highly pressurized drain waves from propagating into an extended metering groove. The assembly comprises a cylindrical housing having a plurality of fuel ports formed in the cylindrical wall and a metering port formed in the end wall, each of the fuel ports being connected with respective fuel injectors, and a rotary spool rotatably mounted within the housing defining a metering chamber between one end face thereof and the end wall of the housing. The rotary spool has formed therein a fuel supply passage connected at one end with a fuel supply source and at the other end selectively connectible with either one of the fuel ports. The rotary spool further has formed therein an extended metering groove and a drain groove spaced circumferencially from the metering groove.

REFERENCES:
patent: 3416506 (1968-12-01), Steiger
patent: 4407250 (1983-10-01), Eheim
patent: 4440134 (1984-04-01), Nakao

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