FUEL INJECTION METHOD AND APPARATUS FOR ENGINES

Title:

FUEL INJECTION METHOD AND APPARATUS FOR ENGINES

Document Type and Number:

WIPO Patent Application WO/1998/039561

Kind Code:

A1

Abstract:

Fuel injection method and apparatus for engines, wherein an accumulator pressure at the fuel injection starting time is determined on the basis of an approximate function, which is determined on the basis of the pressure of a working fluid in the accumulator detected in a predetermined sampling cycle, and an operating period of a control valve for a working fluid in an injector is thereby controlled accurately. An approximate function pr(t) of the accumulator pressure is determined on the basis of a plurality of detected values Pr�1?-Pr�n? of the pressure in the accumulator determined in a predetermined cycle. A set value Prs of the accumulator pressure at the fuel injection time Tinj is determined on the basis of the approximate function Pr(t), and a control valve driving period required to execute a target injection rate on the basis of the set value Prs. Owing to an operation of the control valve controlled during the driving period, a fuel is injected from an injector by utilizing the effect of the pressure of the working fluid.

Inventors:

NAKANO FUTOSHI (JP)

Application Number:

PCT/JP1998/000876

Publication Date:

September 11, 1998

Filing Date:

March 03, 1998

Export Citation:

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Assignee:

ISUZU MOTORS LTD (JP)
NAKANO FUTOSHI (JP)

International Classes:

F02M47/00; F02D41/14; F02D41/32; F02D41/34; F02D41/38; F02D41/40; F02D45/00; F02M47/02; F02M55/02; F02M57/02; F02M59/46; F02M63/02; F02B3/06; (IPC1-7): F02D41/40; F02M47/00

Foreign References:

JPH05106495A	1993-04-27
JPH0693915A	1994-04-05
JPH06511527A	1994-12-22
JPH0658217A	1994-03-01
JPH08232703A	1996-09-10
JPH05125985A	1993-05-21
JPH06511527A	1994-12-22
JPH0712027A	1995-01-17

Other References: