Fuel injection control device

Details Fuel injection control device Fuel injection control device

1998-07-17

2000-06-20

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

361154, F02D 4140, F02M 5106, F02M 4702

Patent

active

060765089

ABSTRACT:
During the low load operation, this fuel injection control device reduces the initial armature displacement speed of the solenoid actuator that drives the open-close valve against the low fuel pressure in the balance chamber, thereby lowering impact noise produced in the solenoid portions. When the engine is determined to be idling, a command pulse width which energizes the solenoids of the solenoid actuator is calculated according to the target injection amount, the common rail pressure, and the target fuel injection timing. Since the initial period of the command pulse width, i.e., pull-in current conduction period, is set shorter than the pull-in current conduction period for the high load operation of the engine, the initial armature displacement speed of the solenoid becomes relatively slow reducing the impact noise of the armature abutting against the stopper.

REFERENCES:
patent: 4242729 (1980-12-01), Weber et al.
patent: 4922878 (1990-05-01), Shinogle et al.
patent: 5235490 (1993-08-01), Frank et al.
patent: 5402760 (1995-04-01), Takeuchi et al.
patent: 5592921 (1997-01-01), Rehbichler
patent: 5794586 (1998-08-01), Oda et al.

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