EGR delivery and control system using dedicated full authority compressor
September 8, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesExhaust 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 InventorsAssigneeApplicationNo. 925579 filed on 09/08/1997US Classes:60/605.2, With exhaust gas recirculation123/568.12, Exhaust gas cooled during recirculation123/568.21Having electrically actuated control meansExaminersPrimary: Wolfe, Willis R.Attorney, Agent or FirmForeign Patent References
International ClassF02M 025/07AbstractAn 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. | |
