公开(公告)号：EP1325227A1

公开(公告)日：2003-07-09

申请号：EP01986743.1

申请日：2001-10-11

申请人： Siemens Automotive Corporation

发明人： LORRAINE, Jack, R. ,  KAPPEL, Andreas ,  ULIVIERI, Enrico ,  GOTTLIEB, Bernhard ,  FISCHER, Bernhard

IPC分类号： F02M51/06 ,  F02M61/16

CPC分类号： F02M51/0603 ,  F02M61/08 ,  F02M61/167

摘要： A fuel injector (10) comprises a body having a longitudinal axis, a length-changing actuator (100) that has first and second ends, a closure member (40) coupled to the first end of the length-changing actuator, and a compensator assembly coupled the second end of the actuator. The length-changing actuator (100) includes first and second ends. The closure member (40) is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly (200) axially positions the actuator with respect to the body in response to temperature variation. The compensator assembly (200) utilizes a configuration of at least one spring (260) disposed between two pistons (220, 240) so as to reduce the use of elastomer seals to thereby reduce a slip stick effect. Also, a method of compensating for thermal expansion or contraction of the fuel injector comprises providing fuel from a fuel supply to the fuel injector; and adjusting the actuator with respect to the body in response to temperature variation.