Cam phasing system with mid-range engine shutdown
    1.
    发明申请
    Cam phasing system with mid-range engine shutdown 审中-公开
    凸轮定相系统具有中档发动机停机功能

    公开(公告)号:US20080136404A1

    公开(公告)日:2008-06-12

    申请号:US12069476

    申请日:2008-02-11

    IPC分类号: G01B7/30

    摘要: A camshaft phaser system includes an oil control spool valve having two opposing springs to center the spool at a rest position to lock the phaser rotor by blocking supply/vent to both the C1 and C2 chambers, obviating a conventional locking pin mechanism. A double-acting solenoid actuator moves the spool to first and second positions, supplying or venting C1 and C2, respectively. The rotor may be locked hydraulically at any position between full advance and full retard. A system for monitoring the rotational positions of the crankshaft and camshaft includes magnets disposed on opposite sides of the shaft axis. A magnetic sensing element senses the rotational direction of the magnetic field for each position of the shaft. An engine control module uses the position signal and an algorithm to lock the rotor at a desired position.

    摘要翻译: 凸轮轴相位器系统包括一个油控滑阀,具有两个相对的弹簧,以使阀芯处于静止位置,以便通过阻止C1和C2两个腔室的供应/排气来锁定相位器转子,从而避免了常规的锁定销机构。 双作用电磁阀执行器将阀芯移动到第一和第二位置,分别供应或排出C1和C2。 转子可以液压地锁定在完全提前和完全延迟之间的任何位置。 用于监测曲轴和凸轮轴的旋转位置的系统包括设置在轴轴线的相对侧上的磁体。 感测元件感测轴的每个位置的磁场的旋转方向。 发动机控制模块使用位置信号和算法将转子锁定在期望的位置。