Method of adjusting the position of rest of an armature in an electromagnetic actuator
First Claim
1. A method of ascertaining the position of rest of a movable armature of an electromagnetic actuator for an engine cylinder valve, assumed between two de-energized electromagnets in response to forces of oppositely acting return springs, and adjusting the position of rest relative to first and second electromagnets, comprising the following steps:
- (a) measuring the inductivities of said first and second electromagnets;
(b) comparing the measured inductivity values to obtain a comparison value;
(c) ascertaining the position of the armature in the position of rest between said first and second electromagnets from the comparison value; and
(d) adjusting at least one of (1) a bias of at least one of said return springs and (2) a position of at least one of said first and second electromagnets relative to said armature until the comparison value equals a desired inductivity value predetermined for said position of rest.
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Accused Products
Abstract
A method of ascertaining the position of rest assumed by a movable armature, in response to forces of oppositely acting return springs, between two deenergized electromagnets. The method includes the following steps: measuring the inductivities of the two electromagnets; comparing the measured inductivity values to obtain a comparison value; and ascertaining the position of the armature in the position of rest between the two electromagnets from the comparison value.
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Citations
4 Claims
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1. A method of ascertaining the position of rest of a movable armature of an electromagnetic actuator for an engine cylinder valve, assumed between two de-energized electromagnets in response to forces of oppositely acting return springs, and adjusting the position of rest relative to first and second electromagnets, comprising the following steps:
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(a) measuring the inductivities of said first and second electromagnets; (b) comparing the measured inductivity values to obtain a comparison value; (c) ascertaining the position of the armature in the position of rest between said first and second electromagnets from the comparison value; and (d) adjusting at least one of (1) a bias of at least one of said return springs and (2) a position of at least one of said first and second electromagnets relative to said armature until the comparison value equals a desired inductivity value predetermined for said position of rest. - View Dependent Claims (2, 3, 4)
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Specification