Diagnostic for two-mode variable valve activation device

Fedewa, Andrew M

Title: Diagnostic for two-mode variable valve activation device

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Abstract

A method is provided for diagnosing a multi-mode valve train device which selectively provides high lift and low lift to a combustion valve of an internal combustion engine having a camshaft phaser actuated by an electric motor. The method includes applying a variable electric current to the electric motor to achieve a desired camshaft phaser operational mode and commanding the multi-mode valve train device to a desired valve train device operational mode selected from a high lift mode and a low lift mode. The method also includes monitoring the variable electric current and calculating a first characteristic of the parameter. The method also includes comparing the calculated first characteristic against a predetermined value of the first characteristic measured when the multi-mode valve train device is known to be in the desired valve train device operational mode.

Inventors:: Fedewa, Andrew M

Issue Date:: 2014-01-07

Research Org.:: DOEEE (USDOE Office of Energy Efficiency and Renewable Energy (EE) (United States))

Sponsoring Org.:: USDOE

OSTI Identifier:: 1117647

Patent Number(s):: 8621917

Application Number:: 13/315,566

Assignee:: Delphi Technologies, Inc. (Troy, MI)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01L - CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01L - CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
F01L13/0036 - {the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction}
F01L2001/3521 - {Harmonic drive of flexspline type}
F01L2001/34496 - {Two phasers on different camshafts}
F01L1/267 - {with means for varying the timing or the lift of the valves}
F01L1/34 - characterised by the provision of means for changing the timing of the valves without changing the duration of opening {and without affecting the magnitude of the valve lift}

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DOE Contract Number:: EE0003258

Resource Type:: Patent

Resource Relation:: Patent File Date: 2011 Dec 09

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Fedewa, Andrew M. Diagnostic for two-mode variable valve activation device.  United States: N. p., 2014. 
        Web.

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                    Fedewa, Andrew M. Diagnostic for two-mode variable valve activation device.  United States.

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                    Fedewa, Andrew M. Tue .  
        "Diagnostic for two-mode variable valve activation device".  United States.  https://www.osti.gov/servlets/purl/1117647.

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@article{osti_1117647,

  title        = {Diagnostic for two-mode variable valve activation device},

  author       = {Fedewa, Andrew M},

  abstractNote = {A method is provided for diagnosing a multi-mode valve train device which selectively provides high lift and low lift to a combustion valve of an internal combustion engine having a camshaft phaser actuated by an electric motor. The method includes applying a variable electric current to the electric motor to achieve a desired camshaft phaser operational mode and commanding the multi-mode valve train device to a desired valve train device operational mode selected from a high lift mode and a low lift mode. The method also includes monitoring the variable electric current and calculating a first characteristic of the parameter. The method also includes comparing the calculated first characteristic against a predetermined value of the first characteristic measured when the multi-mode valve train device is known to be in the desired valve train device operational mode.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2014},

  month        = {1}

}

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