Apparatus and method for control of the air-fuel ratio of an aut

Details Apparatus and method for control of the air-fuel ratio of an aut Apparatus and method for control of the air-fuel ratio of an aut

1994-02-23

1995-09-19

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4100

Patent

active

054508363

ABSTRACT:
With an internal combustion engine wherein a target air-fuel ratio is set on the basis of engine load and engine rotational speed, a setting for a lean air-fuel ratio for improving fuel consumptions prohibited, when an increase in grade resistance is detected or when winding road conditions are estimated, and sets a target air-fuel ratio to ensure drive power is forcibly set. As a result, lean combustion can be avoided under running conditions requiring drive power, so that the vehicle power performance can be ensured as required.

REFERENCES:
patent: 4528961 (1985-07-01), Katoh et al.
patent: 4552116 (1985-11-01), Kuroiwa et al.
patent: 4763629 (1988-08-01), Okazaki et al.
patent: 4936278 (1990-06-01), Umeda
patent: 5144915 (1992-09-01), Grabs
patent: 5261382 (1993-11-01), Nikolai

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