Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Reexamination Certificate
2005-06-14
2005-06-14
Wolfe, Jr., Willis R. (Department: 3747)
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
C060S605200
Reexamination Certificate
active
06904898
ABSTRACT:
Method and arrangement for cleaning an EGR cooler of an exhaust gas recirculation system by detecting an excessive particulate accumulation condition in the EGR cooler and causing liquid-state moisture to be introduced in the EGR cooler thereby enabling a reduction of the excessive particulate accumulation from the EGR cooler. One embodiment of the present invention provides for locating a first temperature sensor after an EGR cooler of an exhaust gas recirculation system at a suitable location to detect an exit-temperature of exhaust gas leaving the EGR cooler and a second temperature sensor at a suitable location to detect a temperature of available coolant for the EGR cooler, arranging the first and second temperature sensors in communication with an automated controller adapted to execute a cleaning routine that affects a periodic reduction of particulate accumulation in the EGR cooler, and executing the cleaning routine, responsive to instructions from the automated controller, when the first temperature sensor has detected an over-threshold temperature condition and the second temperature sensor has detected an under-threshold temperature condition.
REFERENCES:
patent: 5669365 (1997-09-01), Gartner et al.
patent: 5785030 (1998-07-01), Paas
patent: 6401699 (2002-06-01), Persson et al.
patent: 6435166 (2002-08-01), Sato et al.
patent: 6474060 (2002-11-01), Khair
patent: 6474319 (2002-11-01), Hough et al.
patent: 11-62722 (1999-03-01), None
patent: 2002-39019 (2002-02-01), None
patent: WO 02099261 (2002-05-01), None
Novak Druce & Quigg LLP
Volvo Lastyagnar AB
Wolfe, Jr. Willis R.
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