公开(公告)号：US4841924A

公开(公告)日：1989-06-27

申请号：US233703

申请日：1988-08-18

申请人： Keith Hampton ,  Don J. Krzysik ,  Glen R. Lilley

发明人： Keith Hampton ,  Don J. Krzysik ,  Glen R. Lilley

IPC分类号： F02B67/06 ,  F01L1/34 ,  F01L1/344 ,  F16D3/10

CPC分类号： F16D3/10 ,  F01L1/34406 ,  F01L2001/34483 ,  Y10S474/90 ,  Y10T74/1956

摘要： A device (10) for varying the angular phase relation between a camshaft (12) and a crankshaft (unshown) in response to axial displacement of an advancing plate (20) drivingly connected to a support (16) via straight splines (16f) and a drive (18) via angled splines (18d). The support (16) is fixed to an end (12a) of the camshaft (12) for rotation therewith. The drive (18) is journaled on the support (16) and is driven by and in phase with the crankshaft. The advancing plate (20) is also threadably connected to a drum (36) via threads (20c,36a) and the axial displacement is effected by relative rotation between the plate (20) and the drum (36). A clockspring (24) reacting between the support (16) and drum (36) tends to rotate the drum (36) faster than the plate (20) for positioning the plate (20) in a first limit position. The plate ( 20) is selectively movable from the first position toward a second limit position in response to selective application of a frictional retarding force to the drum by an actuation assembly (30). Intermediate plate positions (and of course intermediate phase relations of the camshaft (12) and crankshaft) are provided by balancing the spring and retarding forces. Further, the device contains an internal supply of lubricating oil sealed against leakage by covers (26,28) disposed at the axially facing ends of the device.

公开(公告)号：US5937835A

公开(公告)日：1999-08-17

申请号：US881622

申请日：1997-06-24

申请人： David Turner ,  Edwin D. Lorenz ,  Glen R. Lilley

发明人： David Turner ,  Edwin D. Lorenz ,  Glen R. Lilley

IPC分类号： F02M25/07 ,  F02M25/04

CPC分类号： F02M26/68 ,  F02M26/54 ,  F02M26/67 ,  F02M26/73

摘要： An exhaust gas recirculation (EGR) system (11), especially for a diesel engine, having a valve (25), including a valve stem (29,31) and an actuator operable to move the valve (25) between the open (FIG. 1) and closed positions. The actuator includes an electric motor (47) which provides a low torque, high speed rotary output (51) to an input gear (53) of a reduction gear train (55). The output of the gear train is a relatively high torque, low speed rotation of an output gear (79), which is connected by a linkage (83,85) to the input stem (31) of the valve. The gear train (55) includes a torque limiting clutch (67,69) to protect the teeth of the gears, and a coupling arrangement (91) joins the valve stems (29,31) to permit mis-alignment therebetween.

摘要翻译： 一种排气再循环（EGR）系统（11），特别是用于具有阀（25）的柴油发动机，其包括阀杆（29,31）和可操作以使阀（25）在打开之间移动的致动器（图 1）和封闭职位。 致动器包括向减速齿轮系（55）的输入齿轮（53）提供低扭矩高速旋转输出（51）的电动机（47）。 齿轮系的输出是通过联动装置（83,85）连接到阀的输入杆（31）的输出齿轮（79）的相对较高的转矩，低速旋转。 齿轮系（55）包括用于保护齿轮齿的转矩限制离合器（67,69），并且联接装置（91）连接阀杆（29,31）以允许它们之间的错位。