Title:
内燃機関用の燃料噴射装置
Document Type and Number:
Japanese Patent JP4444234
Kind Code:
B2
Abstract:
A fuel-injection system in an internal-combustion engine is provided with an electroinjector (1) comprising an injection nozzle (5), and a needle (7) mobile along an opening stroke and a closing stroke for opening/closing the nozzle (5) under the control of an electroactuator device (8). The opening stroke of the needle (7) is controlled by a rod (14) pushed by the pressure of the fuel in a control chamber (15), in such a way as to keep the needle (7) normally in the position for closing the nozzle (5). The control chamber (15) is equipped with an inlet duct (18) having a pre-set diameter (D 4 ) and with an outlet passage (24) having a diameter (D 5 ) and controlled by a control valve (16). The method for controlling fuel injection comprises the steps of choosing the ratio (D 5 /D 4 ) of the aforesaid diameters so as to determine a certain rate of displacement of the needle (7), and issuing to the device (8) a first electrical command (C 1 ) and a second electrical command (C 2 ) sufficiently close to one another to displace the needle (7) with a profile of motion (P) without any discontinuities in time.
More Like This:
Inventors:
Mario Ricco
Cist Luigi De Matta Ace
Antonio Gravina
Sergio Stucci
Cist Luigi De Matta Ace
Antonio Gravina
Sergio Stucci
Application Number:
JP2006122425A
Publication Date:
March 31, 2010
Filing Date:
April 26, 2006
Export Citation:
Assignee:
Chi Ele Effe Societa Consortile Per Azioni
International Classes:
F02M47/00; F02M45/08; F02M47/02; F02M61/10
Domestic Patent References:
| JP10259753A | ||||
| JP5001609A | ||||
| JP11200932A |
Foreign References:
| DE19636088A1 |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Hitoshi Nagasaka
Shinsuke Onuki
Tadashige Ito
Hitoshi Nagasaka