发明名称 |
Fuel injector with balanced metering servovalve, for an internal combustion engine |
摘要 |
The injector comprises a balanced metering servovalve to control a rod for the opening/closing of a nozzle. La servovalve has a valve body with a control chamber radially delimited by a tubular portion and fitted with an outlet passage that is opened/closed by an axially movable shutter. The servovalve is also integral with an axial stem, provided with a lateral surface, through which the outlet channel exits. The shutter is coupled to the stem in an axially sliding manner and, when it closes the outlet passage, it is subjected to substantially null axial fuel pressure. The outlet passage has a calibrated segment distanced from the shutter and close to a bottom wall of the control chamber. The calibrated segment is carried by an element fixed to the valve body in correspondence to an axial segment of the outlet passage.
|
申请公布号 |
US7954787(B2) |
申请公布日期 |
2011.06.07 |
申请号 |
US20080021531 |
申请日期 |
2008.01.29 |
申请人 |
C.R.F. SOCIETA CONSORTILE PER AZIONI |
发明人 |
RICCO MARIO;RICCO RAFFAELE;GRAVINA ANTONIO;GARGANO MARCELLO;STUCCHI SERGIO;DE MICHELE ONOFRIO |
分类号 |
F16K31/02 |
主分类号 |
F16K31/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|