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
Reliable event broadcaster with multiplexing and bandwidth control functions
Performance monitoring of advanced process control systems
Device and method for adjusting a chrominance signal based on an edge strength
Electronic device
Data processing apparatus including reconfigurable logic circuit
Air scent dispenser
Motion compensated overlay
  Randomly Featured Patents
Expression of the developmental I antigen by a cloned human cDNA encoding a member of a beta-1, 6-N-acetylglucosaminyltransfrase gene family
Portable animal sprayer
2-(heterocyclylthio)carbapenem derivatives, their preparation and their use as antibiotics
Actuating device for a movable component
Paging accessory for portable information/computing devices
Process for delivering liquid cryogen
Method of connectionless message transfer in an asynchronous transfer mode network
Carbodiimide compound and compositions for rendering substrates oil and water repellent
Blu-ray home theater speaker
Toothbrush with thermally deformable handle