Feed and drain line damping in a fuel delivery system

Internal-combustion engines – Charge forming device – Fuel injection system

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Details

123447, 123446, 123456, 239 90, F02B 300

Patent

active

044175574

ABSTRACT:
A fuel delivery system for a diesel engine for controlling the propogation of unwanted pressure waves including a fuel pump for sequentially delivering fuel from a fuel tank to a plurality of fuel injectors through a plurality of injection lines. The system further includes a drain line, one associated with each fuel injector, that is connected to a pressure source, wherein the impedance of each drain line is equal to the impedance of its corresponding injection line. Each drain line further includes a flow restriction having an impedance which bears a preselected relationship to but different from the impedance of its corresponding drain line and a valve, connected across the flow restriction for diverting flow around the flow restriction during intervals of time when fuel is flowing from the pressure source towards a particular one of the fuel injectors.

REFERENCES:
patent: 3587547 (1971-06-01), Hussey
patent: 4184459 (1980-01-01), Ishii
patent: 4235374 (1980-11-01), Walter et al.
patent: 4281792 (1981-08-01), Sisson
patent: 4372272 (1983-02-01), Walter et al.

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