Rotary actuator device to control the stroke of a charge...

Details Rotary actuator device to control the stroke of a charge... Rotary actuator device to control the stroke of a charge...

2006-06-06

2006-06-06

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090390, C123S090440

Reexamination Certificate

active

07055475

ABSTRACT:
For a rotary actor device for stroke control of a charge changing valve in the cylinder head of an internal combustion engine with rocking stepper motor for driving a control disk with a cam profile controlling a charge changing valve, wherein the rocking motor is operated accordingly, an interplay of a closing spring of the poppet valve with a biased spring arm, provision is made for the achievement of stable end positions of the control disk, such that it is positioned by means of a separate first and second rotary abutment and is held securely against rotation in the particular starting position by the opening spring acting on a shaft bearing the control disk, while in each case by means of a relatively low powering of the stepper motor or of a ricochet movement brought about by means of corresponding abutments to overcome the starting position, the further supply of power remains substantially reduced by means of a rotor of the rocker motor chosen according to the energy exchange between closing spring and arm spring in a rotor of the rocker motor chosen to correspond to its flywheel moment.

REFERENCES:
patent: 4455543 (1984-06-01), Pischinger et al.
patent: 5494007 (1996-02-01), Schroeder et al.
patent: 5873335 (1999-02-01), Wright et al.
patent: 5905917 (1999-05-01), Imura
patent: 6314926 (2001-11-01), Meneely et al.
patent: 2 608 675 (1988-06-01), None

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