Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1986-04-11
1988-01-19
Argenbright, Tony M.
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
2511291, 25112916, 25112918, 335266, F01L 904, H01F 716
Patent
active
047198826
ABSTRACT:
An improved actuator assembly for an electromagnetically-actuated spring-loaded positioning system in displacement machines, such as for lifting valves in internal combustion engines. The positioning mechanism has a spring system and two electrically-operated, opposed actuating solenoids, by means of which the actuator may be moved between, and held at, two discrete, mutually-opposite operating positions. The improved actuator assembly of the invention comprises an actuator anchor plate secured to a guide rod which reciprocatingly engages a guide sleeve. The guide rod is moved back and forth by solenoids acting on the anchor plate, and comes into contact with a separate valve stem, by means of which the valve is opened and closed. The required tolerances for (a) the guideway for the valve stem, and (b) the guideway for the guide rod operating inside the electromagnetic unit, may thus be separately evaluated and selected. The separate guide rod and valve stem arrangement permits precise adjustment of valve travel. The entire positioning system is constructed as an easily replaceable module in its own housing unit.
REFERENCES:
patent: 3412971 (1968-11-01), McDivitt
patent: 3882833 (1975-05-01), Longstaff et al.
patent: 4455543 (1984-06-01), Pischinger et al.
Argenbright Tony M.
Dulin Jacques M.
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