Exhaust gas recirculation system for internal combustion engine
Compound turbocharger system for an internal combustion engine
Combustion process for internal combustion engine
Method and apparatus for high-pressure end exhaust gas recirculation on a supercharged internal combustion engine
Large supercharged diesel engine
Arrangement for return of exhaust gases in supercharged engines with turbines in series
Arrangement for return of exhaust gases in supercharged engines with parallel turbines
Exhaust gas recirculation system employing a turbocharger incorporating an integral pump, a control valve and a mixer
Internal combustion engine with exhaust gas turbocharger Patent #: 5937651
ApplicationNo. 925579 filed on 09/08/1997
US Classes:60/605.2, With exhaust gas recirculation123/568.12, Exhaust gas cooled during recirculation123/568.21Having electrically actuated control means
ExaminersPrimary: Wolfe, Willis R.
Attorney, Agent or Firm
Foreign Patent References
International ClassF02M 025/07
AbstractAn exhaust gas recirculation and control system is provided for an internal combustion engine, wherein a portion of engine exhaust gas flow is recirculated through an EGR duct to engine intake air. The recirculated exhaust gas is pumped through the EGR duct by an EGR compressor driven by a dedicated EGR drive that is independently controllable. Because the EGR drive is independently powered and controlled, the EGR flow rate capacity of the system is not dictated by, or limited, by factors such as engine exhaust flow rate. A controller modulates power delivery to the drive means in response to at least one operating condition parameter in order to achieve a desired EGR flow rate. In order to further optimize efficiency, the EGR compressor is preferably a discrete displacement pump which is controllably drivable in a pulse-capture mode, wherein each intake of the EGR compressor is timed synchronously with exhaust pulses in the exhaust manifold.