Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1998-08-14
2000-01-25
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
25112901, 2511291, F01L 904
Patent
active
060167785
ABSTRACT:
The invention pertains to a magnet valve. The magnet valve has a ferromagnetic coil body with a winding and defines first and second terminal positions. An armature for driving a valve is displaceably disposed in the ferromagnetic coil body between the first terminal position and the second terminal position. The magnet valve also has a housing with a support and a spring is braced between the armature and the support. The magnet valve further has a piezoelectric measuring instrument disposed between the spring and the support for detecting a position of the armature. The measuring instrument provides an output signal which is dependent on a spring force of the spring. In turn, the spring force is associated with a position of the armature. The actual speed of the armature is determined from the position of the armature and the actual speed of the armature is used to regulate a future speed of the armature.
REFERENCES:
patent: 5216987 (1993-06-01), Clarke
patent: 5636601 (1997-06-01), Moriya et al.
patent: 5711259 (1998-01-01), Pischinger et al.
patent: 5769043 (1998-06-01), Nitkiewicz
Greenberg Laurence A.
Lerner Herbert L.
Lo Weilun
Siemens Aktiengesellschaft
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