Method for operating an internal combustion engine under full lo

Details Method for operating an internal combustion engine under full lo Method for operating an internal combustion engine under full lo

1993-10-19

1994-10-25

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123681, F02D 4100

Patent

active

053579372

ABSTRACT:
An internal combustion engine includes a lambda control device having a lambda sensor and a lambda control for regulating a fuel-air mixture to be supplied to an internal combustion engine to a set-point value, outside of full load operation, as a function of an output signal of the lambda sensor, and a mixture control device for setting the fuel-air mixture to a value being less than the set-point value, during full load operation of the internal combustion engine and with the lambda control switched off. A method for operating the internal combustion engine under full load includes continuously detecting and comparing the output signal of the lambda sensor with a rich and a lean threshold value, with the lambda control switched off, releasing the lambda control for a selectable number of mixture state changes, if the output signal of the lambda sensor falls below the lean threshold value during a period of time being greater than a preset value, and keeping the lambda control released until a mean value of the lambda control value indicates a rich main mixture.

REFERENCES:
patent: 4470395 (1984-09-01), Ohgami et al.
patent: 4478192 (1984-10-01), Kinoshita et al.
patent: 4488529 (1984-12-01), Nishida et al.
patent: 4936278 (1990-06-01), Umeda
patent: 4993393 (1991-02-01), Hosoda et al.
patent: 5016596 (1991-05-01), Fujimura et al.
patent: 5067465 (1991-11-01), Yamasaki et al.

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