Method for operating an internal combustion engine, computer...

Details Method for operating an internal combustion engine, computer... Method for operating an internal combustion engine, computer...

2008-05-27

2008-05-27

Solis, Erick (Department: 3747)

Internal-combustion engines

Poppet valve operating mechanism

C123S325000, C123S479000

Reexamination Certificate

active

07377239

ABSTRACT:
A method for operating an internal combustion engine, a computer program product, a computer program, and a control and/or regulating device for an internal combustion engine make detection of an erroneously permanently closed intake valve for a cylinder of the internal combustion engine having more than one intake valve possible. Air and fuel are supplied to the cylinder of the internal combustion engine via a plurality of intake valves. The air and fuel are supplied to the cylinder via a shared duct, which opens into separate ducts for each intake valve of the cylinder. The separate ducts have the same volume. After an interruption of the fuel supply to the cylinder, the fuel supply is resumed. Starting at a first point in time of the resumption of the fuel supply, the fuel quantity supplied to one of the separate ducts is ascertained assuming a permanently closed associated intake valve. A second point in time since the resumption of the fuel supply, at which the separate duct would be completely filled with fuel for the first time if the associated intake valve were permanently closed, is ascertained from the ascertained fuel quantity. A check is performed of whether the cylinder has relatively more combustion misses between the first point in time and the second point in time than after the second point in time. In this instance, it is concluded that an intake valve of the cylinder is erroneously closed.

REFERENCES:
patent: 4779589 (1988-10-01), Matsuura et al.
patent: 6435147 (2002-08-01), Eichenseher et al.
patent: 6840213 (2005-01-01), Takahashi et al.
patent: 6990937 (2006-01-01), Shindou et al.

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