Resources Contact Us Home
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
Ionic liquids
Semiconductor device
Method and system for providing web-enabled cellular access to meter reading data
System and method for transitioning to a whitelist mode during a malware attack in a network environment
Dual small molecule inhibitors of cancer and angiogenesis
Rotary and gripper system including back support stack assist assembly having a tamper bar and holdback vacuum
NLP-based systems and methods for providing quotations
  Randomly Featured Patents
Remote refuse collection and bagging device and method
Method for the recombinant expression of a polypeptide
Oxygen sensor
Bi-directional cleanout with backflow preventer
Process for the preparing .alpha.-chloroacrylic acid chlorides
Interdigitation-fusion liposomes containing arachidonic acid metabolites
Method of making a dram circuit with fin-shaped stacked capacitors
Stray emission reduction circuit
Serving stand