Process for determining the opening time of an injection valve o

Details Process for determining the opening time of an injection valve o Process for determining the opening time of an injection valve o

1998-05-15

1999-11-23

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Fuel injection system

123494, 73119A, F02M 3704

Patent

active

059881437

ABSTRACT:
In a process for determining the opening time of an injection valve of a common-rail injection system, an injection duration is derived from a characteristic diagram based on the fuel quantity to be injected and the static pressure in the common rail. For reading in the characteristic diagram, the value of the static pressure in the common rail is corrected by an amount obtained from the compressional vibration of the fuel as a function of its compressibility, the injected fuel quantity during at least one preceding injection operation, and the time between the at least one preceding injection operation and the current injection operation.

REFERENCES:
patent: 4928655 (1990-05-01), Kako
patent: 5176122 (1993-01-01), Ito
patent: 5402760 (1995-04-01), Takeuchi et al.
patent: 5708202 (1998-01-01), Augustin et al.
patent: 5747684 (1998-05-01), Pace et al.
patent: 5773716 (1998-06-01), Antonioli et al.
patent: 5895844 (1999-04-01), Krueger

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