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
DNA promoters and anthrax vaccines
Using interrupted through-silicon-vias in integrated circuits adapted for stacking
Apparatus and method for connection control with media negotiation successful on different media formats
Method of predicting a motion vector for a current block in a current picture
Modified and stabilized GDF propeptides and uses thereof
Wiring structure in a semiconductor device, method of forming the wiring structure, semiconductor device including the wiring structure and method of manufacturing the semiconductor device
Grip for a racket
  Randomly Featured Patents
Method for the efficient reading of a population of radio frequency identification tags with unique identification numbers over a noisy air channel
Installation for the energy absorption of vehicles
Hanger assembly
Selectively attachable calculator
Ice making apparatus and method
Uranium slurry hauling system
Straight line defect detection
Low-voltage source for narrow electron/ion beams
Method for mitigation of caustic corrosion in coordinated phosphate/ph treatment programs for boilers
Real time environment model generation system