Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Two-step oil control valve failure diagnostic










Image Number 4 for United States Patent #7783413.

A method may include commanding operation of an engine in a first lift mode. The engine may include a valve lifter system that selectively operates a valve member in the first lift mode and a second lift mode through engagement with a camshaft. A first duty cycle of a cam phaser oil control valve (OCV) may be determined to maintain a first camshaft position corresponding to the first lift mode. The camshaft position may be maintained by a cam phaser that is coupled to the camshaft and in communication with the cam phaser OCV. Engine operation may be commanded to the second lift mode and a second duty cycle of the cam phaser OCV may be determined to maintain a second camshaft position corresponding to the second lift mode. A valve lifter system failure may be diagnosed based on a difference between the first and second duty cycles.








 
 
  Recently Added Patents
Wireless communication system, associated methods and data structures
Methods and systems for automated backups and recovery on multi-os platforms using controller-based snapshots
System and method for browsing tabbed-heterogeneous windows
Compact ion accelerator source
Biaxially oriented hydrolysis-stable polyester film comprising epoxidized fatty acid derivatives and a chain extender, and process for production thereof and use thereof
Power device and method of packaging same
Monitoring device, monitoring method and non-transitory computer readable medium
  Randomly Featured Patents
Universal shelving
Adjustable dual-blade dust filter using granular bed flow
Home server including a proxy facility, for executing an authentication and an encryption process instead of a user terminal, in an electronic commercial transaction
Dual sensor system having fault detection capability
Apparatus and method for equalizing received network signals using a transconductance controlled single zero single pole filter
Hay spear accessory apparatus
Valve operating device for an internal combustion engine
Coextruded heat sealable laminar thermoplastic films
Ester derivatives of quinolopyran-4-one-2-carboxylic acids and antiallergic antasthmatics
Expansion joint for reactor or heat exchanger