Diagnostic for two-mode variable valve activation device
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:
- Issue Date:
- 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
- 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.
Fedewa, Andrew M. Diagnostic for two-mode variable valve activation device. United States.
Fedewa, Andrew M. Tue .
"Diagnostic for two-mode variable valve activation device". United States. https://www.osti.gov/servlets/purl/1117647.
@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 = {Tue Jan 07 00:00:00 EST 2014},
month = {Tue Jan 07 00:00:00 EST 2014}
}
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