Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Quinoline compounds and their use for treating viral infection
Method and apparatus for managing communication services for user endpoint devices
Therapeutic compositions and methods
Apparatus for generating electrical energy from rocking activated energy
Personal IP toll-free number
Wafer level package and fabrication method
Method and system for controlled media sharing in a network
  Randomly Featured Patents
Multiprice setting split ring coin control mechanism
Thrust reverser with improved forward thrust efficiency
Portable wireless communications device
Self storing blanket
Solid state laser excited by laser diode
Machine with adapter frame for weight stabilization
Safety double protection device for machines having plural circuit breaker assemblies associated with doffer roller and hand guard
Pipe coupling
Image splitter for two-way imaging apparatus
Method and apparatus for proton therapy