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
Sensor apparatus and information processing apparatus
Control of an electric machine
Login security with short messaging
Use of a high-oleic and high-tocol diet in combination with a non-tocol antioxidant for improving animal meat quality
Audio signal clip detection
Stereoscopic editing for video production, post-production and display adaptation
Display apparatus, control method thereof, and program
  Randomly Featured Patents
Rotating system with reduced transference of vibration and acoustics and method for reducing same
System for reproducing and recording a plurality of color originals
Torsion exercise apparatus
Process for wood acetylation and product thereof
Solar cells and methods of fabrication thereof
Information handling system cooling system
High performance micromechanical tunable verticle cavity surface emitting laser
Toilet overflow control
Set top box
Method for producing pure phosphoric acid