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
Cooking tray
Ni-, Co-, and Mn- multi-element doped positive electrode material for lithium battery and its preparation method
Thermoplastic fluoropolymer composition
Systems, methods, and devices for selling transaction instruments via web-based tool
Organic light emitting display apparatus
Universal handle extension for unloading butterfly valve for tank trailer or other vehicle
Method and system for encrypting data in a wireless communication system
  Randomly Featured Patents
Display device having reduced step coverage at overlapping portion of color filters
Window reveal molding
Isolated ink feed mechanism
Crystal forms of atorvastatin hemi-calcium and processes for their preparation as well as novel processes for preparing other forms
Event driven change injection and dynamic extensions to a business process execution language process
Preparation of melt-resistant process cheese
Golf club
Method for screen printing glass articles
Surfactant mixtures for tertiary oil recovery
Multi-use brew bowl