Fuel injection timing control system of fuel-injection pump for

Details Fuel injection timing control system of fuel-injection pump for Fuel injection timing control system of fuel-injection pump for

1998-01-30

1999-12-07

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123458, F02M 3704

Patent

active

059965576

ABSTRACT:
A fuel injection timing control system for a diesel fuel injection pump with a duty-cycle controlled electromagnetic solenoid valve associated with an injection-timing-control timer piston to change a timer-piston axial position or a set position of a pump plunger in response to a duty cycle of the electromagnetic solenoid valve, comprises a control unit for transiently permitting the entry of a duty cycle of the electromagnetic solenoid valve into a predetermined dead-zone for a predetermined period of time during a fuel injection timing closed-loop control in which an actual injection timing is feed-back controlled toward a target injection timing. In addition, the control unit limits the duty cycle of the electromagnetic solenoid valve to a predetermined limiting value as soon as the predetermined time period has been elapsed, during the fuel injection timing closed-loop control.

REFERENCES:
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patent: 4493302 (1985-01-01), Kawamura
patent: 4590913 (1986-05-01), Faupel
patent: 4592327 (1986-06-01), Fujimori
patent: 4825373 (1989-04-01), Nakamura et al.
patent: 5188084 (1993-02-01), Sekiguchi
patent: 5201297 (1993-04-01), Eblen
patent: 5375575 (1994-12-01), Ohishi
patent: 5531204 (1996-07-01), Sekiguchi
patent: 5617831 (1997-04-01), Shirakawa
patent: 5697347 (1997-12-01), Enomoto
patent: 5806498 (1998-09-01), Iwai

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