Resources Contact Us Home
Catalyst activation control system for engines

Image Number 19 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 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
Scalable packet processing systems and methods
Biological information monitoring system
Positive electrode for secondary battery, and secondary battery
Electronic currency, electronic wallet therefor and electronic payment systems employing them
Liposomes with improved drug retention for treatment of cancer
  Randomly Featured Patents
Process and device for detecting dust-associated substances
Fiber-pigtailed assembly
Tool for tying cable harnesses
Delay locked loop circuit having duty cycle correction function and delay locking method
Sleep over recliner chair
Output image adjustment of image data
Portable lamp with conformable base
Razor guard
Parallel concatenated code with soft-in soft-out interactive turbo decoder
Video/compact disk player having reduced track search time