Method and device for operating an internal combustion engine

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

2005-03-08

2005-03-08

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

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

C060S324000, C060S288000, C073S118040

Reexamination Certificate

active

06862878

ABSTRACT:
A method and a device for operating an internal combustion engine, in particular of a motor vehicle, which allow detecting a function of at least one actuating element in an exhaust branch without an additional sensory system. The internal combustion engine includes exhaust-gas recirculation via which exhaust gas is conveyed from the exhaust branch to an intake manifold in an activated state. The internal combustion engine includes at least one actuating element in the exhaust branch. In at least one operating state of the internal combustion engine, given activated exhaust-gas recirculation, a first intake-manifold pressure is ascertained in a first position of the at least one actuating element in the exhaust branch, and a second intake-manifold pressure in a second position of the at least one actuating element in the exhaust branch. The function of the at least one actuating element in the exhaust branch is monitored as a function of a difference between the first and the second intake-manifold pressures.

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patent: 6401451 (2002-06-01), Yasui et al.
patent: 6687601 (2004-02-01), Bale et al.

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