Diagnostic for two-mode variable valve activation device
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.
- Research Organization:
- DOEEE (USDOE Office of Energy Efficiency and Renewable Energy (EE) (United States))
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0003258
- Assignee:
- Delphi Technologies, Inc. (Troy, MI)
- Patent Number(s):
- 8,621,917
- Application Number:
- 13/315,566
- OSTI ID:
- 1117647
- Resource Relation:
- Patent File Date: 2011 Dec 09
- Country of Publication:
- United States
- Language:
- English
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