公开(公告)号：EP1149235A4

公开(公告)日：2004-07-14

申请号：EP99946840

申请日：1999-09-10

申请人： DIESEL TECH CO

发明人： SPOOLSTRA GREGG R

IPC分类号： F02M45/00 ,  F02M45/06 ,  F02M45/12 ,  F02M51/04 ,  F02M51/06 ,  F02M57/02 ,  F02M59/36 ,  F02M59/46 ,  F04B49/12 ,  F16K31/06 ,  F02M37/04 ,  F04B39/08

CPC分类号： F02M45/12 ,  F02M45/00 ,  F02M45/06 ,  F02M57/02 ,  F02M59/366 ,  F02M59/466 ,  F04B49/12

摘要： Pumps (10) and injectors (10) having a control valve spring arrangement (70) configured to provide a force step when the control valve (46) is at a rate shape position, and related methods for operating a control valve (46), are provided. The control valve (46) is moveable over a stroke range between an open position and a closed position. The stroke range includes a rate shape position. The control valve spring arrangement (70) is configured to provide a first spring force when the control valve is between the closed position and the rate shape position, and to provide a second spring force that is less than the first spring force when the control valve (46) is between the rate shape position and the open position.

公开(公告)号：EP1159525A4

公开(公告)日：2004-03-31

申请号：EP00908760

申请日：2000-02-22

申请人： DIESEL TECH CO

发明人： JETT BRYAN THOMAS ,  SPOOLSTRA GREGG R

IPC分类号： F02M59/34 ,  F02M45/00 ,  F02M51/00 ,  F02M57/02 ,  F02M59/36 ,  F02M59/46 ,  F02M37/04

CPC分类号： F02M59/366 ,  F02M57/02 ,  F02M59/466

摘要： Pumps (6) and injectors (4) utilize a control valve (46) having a valve body (48) with a valve stem (88) having a step (94) adjacent to the seating surface (92). The step extends a limited distance away from the seating surface to provide limited pressure relief when the valve body is at an intermediate position that is between the opened and closed positions. Step cross-section and axial length may be configured based on desired hydraulic behavior. In a preferred embodiment, the control valve step is configured for injection rate shaping.

公开(公告)号：EP1108133A4

公开(公告)日：2002-12-18

申请号：EP99943643

申请日：1999-08-03

申请人： DIESEL TECH CO

发明人： SPOOLSTRA GREGG R

IPC分类号： F02M57/02 ,  F02M59/36 ,  F02M59/46 ,  F02M45/06 ,  F02M45/12

CPC分类号： F02M59/466 ,  F02M57/02 ,  F02M59/366 ,  F02M63/0075

摘要： Pumps and injectors having a control valve with an adjustable stroke for rate shaping and associated methods for operating a control valve are provided. The pump (10) or injector comprises a body (12) with a pumping chamber (16) and a control valve chamber (22). A plunger (30) is disposed in the pumping chamber (16). An actuatable control valve (46) disposed in the control valve chamber (22) controls fuel. The control valve (46) includes a valve body (48) moveable over an adjustable stroke range including opened and closed positions. The stroke range is adjustable to vary an effective open gap when the valve body (48) is in the open position. An actuatable valve stop assembly adjacent to the control valve chamber (22) includes a main body and a stop member that is moveable between extended and retracted positions. The stop member limits the stroke range such that the control valve has a first effective open gap when the stop member is in the extended position, and such that the control valve has a second effective open gap when the stop member is in the retracted position. A first armature (52) and first stator assembly operate to actuate the control valve. A second armature (62) and second stator assembly (64) operate to actuate the valve stop assembly.