Cam shaft for fuel injection pump

Internal-combustion engines – Charge forming device – With fuel pump

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123496, F02M 3704, F02M 5900

Patent

active

053077814

ABSTRACT:
A cam shaft reduces noise produced by gears used to drive cams of a fuel injection pump. Conventionally, the gear noises are caused by negative torque of a cam shaft. A cam profile of each cam which lifts a plunger of the fuel injection pump is shaped like a fan. There are formed two cams in a single cam shaft. A lift increment segment of a first cam overlaps a lift decrement segment of a second cam to prevent a negative torque.

REFERENCES:
patent: Re30189 (1980-01-01), Perr
patent: 3951117 (1976-04-01), Perr
patent: 4308839 (1982-01-01), Hafner
patent: 4478196 (1984-10-01), Hafner
patent: 5094215 (1992-03-01), Gustafson
patent: 5094216 (1992-03-01), Miyaki

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