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Title: 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):
8,621,917
Application Number:
13/315,566
Assignee:
Delphi Technologies, Inc. (Troy, MI)
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 = {2014},
month = {1}
}

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