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
Systems and methods for port mirroring with network-scoped connection-oriented sink
System and method for the heterologous expression of polyketide synthase gene clusters
Endotracheal tube
Systems and methods to provide report part via a web service
Apparatus and method for multiple pagings in broadband wireless communication system
Switched capacitor amplifier
Semiconductor device element formed on SOI substrate comprising a hollow region, and having capacitors in an electric field alleviation region
  Randomly Featured Patents
Emulation suspension mode with stop mode extension
Apparatus for power clamping work pieces
LCD backlight dimming, LCD/image signal compensation and method of controlling an LCD display
Topically effective, nonsteroidal drug for use in external and internal eye inflammations
Shaped, fractured abrasive particle, abrasive article using same and method of making
Orthodontic toothbrush
Drill insert geometry having V-notched web
Image forming apparatus and image adjusting method
Display control device and method of controlling same
Camera having magnetic head for demagnetizing and recording in demagnetization pattern