内燃エンジンのための平衡計量サーボバルブを備えた燃料噴射装置

Japanese Patent JP4728358

B2

The injector (1) comprises a balanced metering servovalve (5) for controlling a rod (10) for opening/closing a nozzle. The servovalve (5) has a valve body (7) with a control chamber (26) fitted with an outlet passage (42a) that is opened/closed by an axially mobile shutter (47). The shutter (47) is integral with a sleeve (41) separate from the armature (17) and is made of a harder material, machined with extreme precision. The sleeve (41) is guided by an axial stem (38), provided with a lateral surface (39) to which a discharge channel (42) in communication with the outlet passage (42a) runs. The shutter (47) is coupled to the stem (38) in an axially sliding manner such that it is substantially balanced when it closes the channel (42). The shutter (47) comprises a sharp edge (45) able to close an annular chamber (46) in communication with the outlet passage (42), so as to keep the sleeve (41) in contact with the armature (17) when this is operated by the electro-actuator (15).

Mario Ricco
Rafael Ricco
Sergio Stucki
Domenico Reporte
Carlo Mazzarella

JP2008021220A

July 20, 2011

January 31, 2008

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C.R.F.Societa Consortile per Azioni

F02M47/00; F02M45/08; F02M51/00

JP2006329204A
JP9119362A
JP8232797A
JP5223035A

Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen

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