公开(公告)号：US5628286A

公开(公告)日：1997-05-13

申请号：US622715

申请日：1996-03-26

申请人： Senji Kato ,  Nobuhisa Ohkawa ,  Shigeru Sone ,  Tadahisa Naganawa ,  Yoshihito Moriya ,  Yoshiya Yamashita ,  Hitoshi Uda ,  Yuji Yoshihara

发明人： Senji Kato ,  Nobuhisa Ohkawa ,  Shigeru Sone ,  Tadahisa Naganawa ,  Yoshihito Moriya ,  Yoshiya Yamashita ,  Hitoshi Uda ,  Yuji Yoshihara

IPC分类号： F01L1/34 ,  F01L1/344 ,  F02D13/02 ,  F02D45/00 ,  F16H55/18 ,  F01L13/00

CPC分类号： F02D13/0215 ,  F01L1/34406 ,  F02D13/0261 ,  F01L2001/0537 ,  F01L2001/34426 ,  F01L2201/00 ,  F02D2041/001 ,  Y02T10/18

摘要： An improvement of a valve timing control apparatus for an engine is disclosed. The apparatus has an intake valve and an exhaust valve which are alternately opened and closed in a valve timing sequence according to a rotation of a cam shaft. A timing pulley mounted on the cam shaft has a housing accommodating a plunger movable therein and a sleeve secured to the cam shaft. The housing has a first and second pressure chambers defined by the plunger and sealed with respect to each other. The plunger is arranged to move in an axial direction to selectively advance and retard the cam shaft based on differential pressure between the first pressure chamber and the second pressure chamber. A controller controls an electromagnetic valve with a specific control value to adjust the fluid pressure to be supplied to the first and second pressure chambers to maintain the valve timing sequence converged to a target valve timing. The controller corrects the specific value based on a rotational speed of the engine when the plunger is in one of the extreme positions in the chambers, and adjusts the fluid pressures based on the corrected specific value.

摘要翻译： 公开了一种用于发动机的气门正时控制装置的改进。 该装置具有根据凸轮轴的旋转以气门正时顺序交替地打开和关闭的进气门和排气门。 安装在凸轮轴上的正时滑轮具有容纳可移动到其中的柱塞的壳体和固定到凸轮轴的套筒。 壳体具有由柱塞限定并相对于彼此密封的第一和第二压力室。 柱塞布置成沿轴向方向移动以根据第一压力室和第二压力室之间的压差选择性地前进并延迟凸轮轴。 控制器控制具有特定控制值的电磁阀，以调节要供应到第一和第二压力室的流体压力，以保持气门正时序列收敛到目标气门正时。 当柱塞处于室内的极限位置之一时，控制器基于发动机的转速校正特定值，并且基于校正的特定值来调节流体压力。