Resources Contact Us Home
Two-step oil control valve failure diagnostic

Image Number 2 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
Lubricant coating device and image forming apparatus
Device to facilitate moving an electrical cable of an electric vehicle charging station and method of providing the same
Uplink interference mitigation method and apparatus
Implantable medical devices including elongated conductor bodies that facilitate device and lead configuration variants
Method for producing carrier on which microorganisms capable of conducting multiple parallel mineralization are immobilized, column reactor and solid medium for cultivating plants
Multi-band dipole antenna
Navigation apparatus, search result display method, and graphical user interface
  Randomly Featured Patents
Drum brake with controlled torque and torque control valve for such a brake
Junction box for low profile raised panel flooring
Temperature mapping method
1,4,5,6,7,8-Hexahydro-2-methyl-5-oxo-4-(2-thiazolyl)-3-quinoline carboxylic acid 2-methyl(phenylmethyl)amino ethyl ester and pharmaceutically acceptable salts
Actuator structure for a magnetic head suspension assembly in a disk drive
Linear prediction based noise suppression
Printing system utilizing cartridge pre-stored with identifiers with identifying printed pages
Liquid crystal compound
Apparatus and method for monitoring the performance of a microprocessor
Channel pulper