Engine air and fuel control
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 4, 2001
Grant Date -
N/A
app pub date -
Oct 18, 1999
filing date -
Oct 18, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control method for an internal combustion engine has multiple cylinder groups with at least one control device positioned between an intake manifold and a cylinder group. The engine operates the cylinder groups at different air/fuel ratios and uses the control device to balance torque produced by the different cylinder groups. In one aspect of the invention, one cylinder group is operated rich and another cylinder group is operated lean thereby providing heat to an exhaust system located downstream of the engine.
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