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
Modular storage system
Image processing apparatus and image processing method
Method of manufacturing acrylic film, and acrylic film
System and method for efficient association of a power outlet and device
VGPU: a real time GPU emulator
Electronic device assemblies
Hydrostatic pad pressure modulation in a simultaneous double side wafer grinder
  Randomly Featured Patents
Liquid crystal display device and method for manufacturing the same
Method for mitigation of caustic corrosion in coordinated phosphate/ph treatment programs for boilers
System for mounting a ski binding on a ski
Spinning apparatus with twisting guide surface
Mechanism casing provided with particular venting devices
Nitride semiconductor growth method, nitride semiconductor substrate, and nitride semiconductor device
Rate responsive cardiac pacemaker with impedance sensing
Chorded zither
Photothermographic material and method for preparing photosensitive silver halide emulsion
Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor