Parameter Estimation In An Actuator

Abstract

A method for parameter estimation in an electromagnetic actuator having a main coil and a search coil includes driving a current through the main coil, determining a main coil voltage, determining a search coil voltage, determining a main coil current, and estimating at least one parameter of the actuator based on the main coil voltage, the search coil voltage and the main coil current.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 61 / 968,145, filed March 20, 2014, and U.S. Provisional Application No. 61 / 968,048, filed March 20, 2014, which are incorporated herein by reference. technical field [0003] The present disclosure relates to solenoid valve activated actuators. Background technique [0004] The statements in this section merely provide background information related to the present disclosure. Accordingly, such statements are not intended to constitute an admission of prior art. [0005] Solenoid valve actuators can be used to control fluids (liquids and gases), or for positioning or for control functions. A typical example of a solenoid valve actuator is a fuel injector. Fuel injectors are used to inject pressurized fuel into a manifold, into an intake port, or directly into a combustion chamber of an internal combustion engine. Known fuel injectors include a so...

AI Technical Summary

Problems solved by technology

When the actuation of the fuel injector is controlled based on the current applied to the electrical coil, it is difficult to estimate the resistance of the electrical coil due to the drop in resistance that occurs in response to the transition of the current applied to the electrical coil

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