Patent ID: 8210139
Filing Date: 2012-07-03
Classification: F01L,F02F

Abstract:
1. A head assembly for an internal combustion engine with an electromagnetic valve actuation system, comprising: a head having an intake or exhaust passage defined therein, the head is at least partially formed of a ferromagnetic material; a valve disposed in the passage and operable to selectively open and close the passage; the head having a cooling passage defined therein for passage of a cooling fluid; and an electromagnetic actuator having a piston in mechanical communication with the valve and a coil in fluid communication with the cooling passage, the coil including a coil support and a coil wire wound around the coil support, the coil of the electromagnetic actuator being disposed in the head such that the coil is at least partially surrounded by the ferromagnetic material such that the ferromagnetic material forms a flux path for the coil, the head assembly being configured such that no ferromagnetic material is disposed between the coil wire and the ferromagnetic material of the head; wherein the electromagnetic actuator is operable to move the valve between a closed and an open position.