Abstract: A system and method for controlling an injection time of a fuel injector. The system includes a drive circuit configured to output a drive signal having a pulse width, wherein the injection time is influenced by the pulse width and a closing electrical decay of the fuel injector. A controller is configured to determine the closing electrical decay of the fuel injector and adapt the pulse width based on the closing electrical decay to control the injection time. The closing electrical decay includes a closing response. The controller determines the closing response based on an injector signal, such as a coil voltage of the fuel injector. By determining the closing response, the pulse width can be adjusted to compensate for fuel injector part-to-part variability, fuel injector wear, variations in fuel pressure received by the fuel injector, dirt in the fuel injector, and the like.

Abstract: A system and method for controlling an injection time of a fuel injector. The system includes a drive circuit configured to output a drive signal having a pulse width, wherein the injection time is influenced by the pulse width and a closing electrical decay of the fuel injector. A controller is configured to determine the closing electrical decay of the fuel injector and adapt the pulse width based on the closing electrical decay to control the injection time. The closing electrical decay includes a closing response. The controller determines the closing response based on an injector signal, such as a coil voltage of the fuel injector. By determining the closing response, the pulse width can be adjusted to compensate for fuel injector part-to-part variability, fuel injector wear, variations in fuel pressure received by the fuel injector, dirt in the fuel injector, and the like.

Abstract: A cam phaser apparatus comprising a triple member gear system for transferring a driving torque from a drive member to a driven member and for selectively adjusting the angular relationship between the drive and driven members, said triple member gear system comprising a first member comprising a driving part, a second member comprising a driven part connectable to a cam sprocket or pulley, and a third member comprising an adjusting means connectable to a camshaft, said third member being connected to means for rotating said third member or applying a braking torque and/or a motoring torque to said third member to vary the angular relationship between the first and second members, wherein the cam phaser apparatus further comprises a selectively actuable coupling means for selectively coupling two of said first, second and third members. In one embodiment the coupling means comprises a magnetic coupling.

Abstract: A cam drive apparatus comprising a magnetic gear adapted to communicate rotational movement between a crankshaft and a cam shaft, wherein said magnetic gear comprises an outer member comprising a plurality of circumferentially spaced magnet means, said outer member being mounted for rotation with one of said crankshaft and camshaft, an inner member comprising a plurality of circumferentially spaced magnet means, said inner member being concentrically arranged within said outer member to define an annular gap therebetween, and an intermediate member comprising a plurality of circumferentially spaced ferromagnetic pole pieces located within said annular gap between said inner and outer members and being mounted for rotation with the other of said crankshaft and camshaft.

Abstract: A cam phaser apparatus comprising a triple member gear system for transferring a driving torque from a drive member to a driven member and for selectively adjusting the angular relationship between the drive and driven members, said triple member gear system comprising a first member comprising a driving part, a second member comprising a driven part connectable to a cam sprocket or pulley, and a third member comprising an adjusting means connectable to a camshaft, said third member being connected to means for rotating said third member or applying a braking torque and/or a motoring torque to said third member to vary the angular relationship between the first and second members, wherein the cam phaser apparatus further comprises a selectively actuable coupling means for selectively coupling two of said first, second and third members. In one embodiment the coupling means comprises a magnetic coupling.