Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Catalyst activation control system for engines










Image Number 10 for United States Patent #6513319.

An engine has variable timing mechanisms, which are controlled in starting an engine to set valve opening overlap of an intake valve and an exhaust valve around 30.degree. CA. In this case, internal EGR is actively conducted and fuel burning velocity within a cylinder becomes relatively slow and unburned fuel within the cylinder is emitted to an exhaust pipe to be post-burned by itself. Temperature of exhaust gas is maintained high and catalyst converters in the cold state may be activated quickly by actively implementing the post-burning within the exhaust pipe. Further, ignition timing is retarded, an air-fuel ratio is controlled at a slightly lean ratio and the exhaust valve is advanced. The effect of raising the temperature of exhaust gas by the post-burning may be realized more reliably by combining each of these controls.








 
 
  Recently Added Patents
Display stand for a mobile tablet computer
Phase locking loop
Substrate and patterning device for use in metrology, metrology method and device manufacturing method
Cooler
Method for determining a corrected variance representative of the condition of reception of signals representative of symbols
Nuclear fuel assembly bottom nozzle
System and method for enhanced artificial bandwidth expansion
  Randomly Featured Patents
Automatic steering apparatus for vehicles
Wheeled personal mobility devices with collapsible wheel axle assemblies and integrated steering and propulsion linkages
Finely divided transparent metal-free X-phthalocyanine
Capacitor of semiconductor device and method for forming the same
Perforated laminate
Sutureless vessel plug and methods of use
Apparatus and method for real-time extraction and display of musical chord sequences from an audio signal
Composite monolithic elements and methods for making such elements
Autotracking for a helical scan magnetic tape recorder
Apparatus for producing patterns on advancing strips