Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Internal combustion engine control for improved fuel efficiency










Image Number 7 for United States Patent #8131447.

A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. Generally, selected combustion events are skipped during operation of the internal combustion engine so that other working cycles can operate at a better thermodynamic efficiency. In one aspect of the invention, an engine is controlled to operate in a variable displacement mode. In the variable displacement mode, fuel is not delivered to the working chambers (e.g. cylinders) during selected "skipped" working cycles. During active ("non-skipped") working cycles, a maximum (e.g., unthrottled) amount of air and an optimized amount of fuel is delivered to the relevant working chambers so that the fired working chambers can operate at efficiencies closer to their optimal efficiency. A controller is used to dynamically determine the chamber firings required to provide the engine torque based on the engine's current operational state and conditions. The chamber firings may be sequenced in real time or in near real time in a manner that helps reduce undesirable vibrations of the engine.








 
 
  Recently Added Patents
Data processor and scanner device
Active pulse blood constituent monitoring
Method for production of fermentable sugars from biomass
Image processing device, image forming apparatus, and non-transitory computer readable recording medium
Mobile device mode control based on dual mapping of availability (presence) information
Composite conductive pads/plugs for surface-applied nerve-muscle electrical stimulation
Wristband with detachable labels
  Randomly Featured Patents
Spindle control system
Flat cathode ray tube
Method and apparatus of adaptively canceling a fundamental frequency of an analog signal
Method of controlling heat exchangers using enthalpy flow as the correcting variable
Polysulfone semipermeable membrane and method of manufacturing the same
Gas burner
Installation for producing cables
Directional solidification of metal matrix composites
Borate cross-linking solutions
Aerodynamically improved tailgate construction for pickup truck