Electric valve drive device in an internal combustion engine
AssigneeFuji Oozx Inc.
InventorsNoriomi Miyoshi, Kizuku Ohtsubo
Life of this patent
Estimating the term…
Abstract
A poppet valve is provided to open and close a valve seat in an internal combustion engine. At the end of a valve stem of the valve, a cylindrical support is fixed, and on the outer circumferential surface of the support, a moving coil is wound. There is formed an annular cavity in a yoke fixed to a bracket fixed on a cylinder head, and a permanent magnet is fixed in the annular cavity of the yoke. Between the permanent magnet and the yoke in the annular cavity, the support which has the moving coil is inserted. By a control system having CPU, an electric current is applied to the moving coil, thereby providing optimum valve timing and lift to decrease seating noise and improving engine performance.
Claims33
An electric valve drive device in an internal combustion engine, comprising:
- a cylindrical support which is fixed to an upper end of a valve stem of a poppet valve;
- a moving coil which is wound on an outer circumferential surface of said support;
- a magnet which is mounted to a stationary part near the moving coil so that magnetic flux may be generated in a direction perpendicular to winding of the moving coil, said poppet valve being moved up and down when an electric current is applied to said moving oil;
- the stationary part comprising a yoke which is fixed to a cylinder head via a cylindrical bracket;
- and
- the voke having an annular cavity which is concentric to the valve and opens at a lower end in which the support is placed.
An electric valve drive device in an internal combustion engine, comprising:
- a cylindrical support which is fixed to an upper end of a valve stem of a poppet valve;
- a moving coil which is wound on an outer circumferential surface of said support;
- a magnet which is mounted to a stationary part near the moving coil so that magnetic flux may be generated in a direction perpendicular to winding of the moving coil, said poppet valve being moved up and down when an electric current is applied to said moving oil;
- and
- the moving coil being covered with light metal or synthetic resin and impregnated in thermosetting resin, so that the coil is cured and integrally fixed to the support.
Dependencies are inferred from the claim text.