公开(公告)号：US20050061271A1

公开(公告)日：2005-03-24

申请号：US10668756

申请日：2003-09-23

Applicant: Jeffrey Pfeiffer ,  Gregg Stepien ,  Amanpal Grewal

Inventor： Jeffrey Pfeiffer ,  Gregg Stepien ,  Amanpal Grewal

IPC: F01L1/34

CPC classification number: F01L1/34 ,  F01L2800/00 ,  F01L2800/01 ,  F01L2820/041 ,  Y10T74/2102

Abstract: A method of determining the position of a cam phaser determines and stores an adaptively updated base offset corresponding to the phase offset of a camshaft relative to a crankshaft for a reference or default position of a cam phaser. Thereafter, the phaser position is determined relative to the base offset. Individual base offsets are preferably determined for each tooth of a toothed cam wheel, and stored in a non-volatile memory device. During engine operation, the base offsets are subject to diagnostic testing and adaptive updating, and the updated base offsets are stored in the non-volatile memory at engine shut-down.

Abstract translation: 确定凸轮相位器的位置的方法确定并存储与凸轮轴相对于曲轴的相位偏移相对应的自适应更新的基本偏移，用于凸轮相位器的基准或默认位置。 此后，相对于基本偏移确定相位器位置。 优选地，针对齿形凸轮的每个齿确定单独的基座偏移，并且存储在非易失性存储装置中。 在发动机运行期间，基座偏移量进行诊断测试和自适应更新，并且更新的基准偏移量在发动机停机时存储在非易失性存储器中。

公开(公告)号：US20070185640A1

公开(公告)日：2007-08-09

申请号：US10668384

申请日：2003-09-23

Applicant: Jeffrey Pfeiffer ,  Amanpal Grewal ,  Daniel McKay

Inventor： Jeffrey Pfeiffer ,  Amanpal Grewal ,  Daniel McKay

IPC: G06G7/70

CPC classification number: F01L1/344 ,  F01L2201/00 ,  F01L2800/00 ,  F02D35/0007 ,  F02D2041/001 ,  F02D2041/1409 ,  F02D2041/1422

Abstract: A closed-loop control for a cam phase adjustment mechanism includes gain terms that are adaptively adjusted to optimize the rate of response of the control to changes in the desired cam phase. The rate of response of the cam phase adjustment mechanism is sampled under specified operating conditions or during certain repeated engine events that involve a change in the desired cam phase, and the deviation of the measured rate of response from the nominal rate of response is determined and used to adjust the closed-loop control gains for restoring the nominal response.

Abstract translation: 用于凸轮相位调节机构的闭环控制包括被自适应地调整以使控制对所需凸轮相位变化的响应速率最优化的增益项。 凸轮相位调整机构的响应速率在规定的运行条件下或在涉及所需凸轮相位变化的某些重复发动机事件期间进行采样，并且确定测量的响应速率与标称响应速率的偏差， 用于调整闭环控制增益以恢复标称响应。