Method and device for operating an internal combustion...

Details Method and device for operating an internal combustion... Method and device for operating an internal combustion...

2007-05-29

2007-05-29

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C060S605200, C701S108000

Reexamination Certificate

active

11215338

ABSTRACT:
Provided are a method and device for operating an internal combustion engine having exhaust-gas recirculation, the method and device allowing a diagnosis of an exhaust-gas recirculation cooler during normal operation of the internal combustion engine. In this context, a variable characteristic of the functioning of the exhaust-gas recirculation cooler is monitored. The variable characteristic of the functioning of the cooling device is ascertained as a function of a measured value. The variable characteristic of the functioning of the exhaust-gas recirculation cooler is specified on the basis of an intact exhaust-gas recirculation cooler. The ascertained value of the variable characteristic of the functioning of the exhaust-gas recirculation cooler is compared to the predefined value. An error is detected when the ascertained value of the variable characteristic of the function of cooling device deviates from the specified value.

REFERENCES:
patent: 6085732 (2000-07-01), Wang et al.
patent: 6725847 (2004-04-01), Brunemann et al.
patent: 6848434 (2005-02-01), Li et al.
patent: 2003/0213230 (2003-11-01), Yahata et al.
patent: 199 63 358 (2001-07-01), None
patent: 100 03 060 (2003-10-01), None
patent: 2002129996 (2002-05-01), None

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