Internal-combustion engines – Charge forming device – With fuel pump
Patent
1990-04-16
1992-10-20
Miller, Carl S.
Internal-combustion engines
Charge forming device
With fuel pump
123447, 123467, F02M 3704
Patent
active
051561328
ABSTRACT:
A Diesel fuel injection device has a pressure accumulation piping for accumualting a fuel at a high pressure and an injector for injecting the fuel supplied by the pressure accumulating piping. The injector including a nozzle needle operative to open and close an injection orifice and a three-way solenoid valve operative to control the fuel pressure acting on the nozzle needle. The three-way solenoid valve is controlled to actuate the nozzle needle and to cause the fuel in the pressure accumulation piping to be injected through the injection orifice. A control valve is provided to control the injection rate characteristic to provide a boot-type injection characteristic. A boot type invention characteristic that is defined by a first characteristic in which the injection rate is substantially constant for a predetermined time period, a subsequent second characteristic in which the injection rate is gradually increased from the first characteristic, and a subsequent third characteristic in which the injection rate is suddenly decreased from the second characteristic; whereby operation noise is be reduced.
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patent: 4784101 (1988-11-01), Iwanaga
Miller Carl S.
Nippondenso Co. Ltd.
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