Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1996-09-20
1999-08-24
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123696, F02D 4114
Patent
active
059412232
ABSTRACT:
A feedback control system and method for operating an internal combustion engine to provide the desired air/fuel ratio under all running conditions. The feedback control operates to modify the fuel/air ratio from that achieved by a basic setting that is derived from parameters of engine performance so as to maintain the desired ratio. The feedback control adjusts the air/fuel ratio in two different modes. In a first lean-set mode, when the air/fuel ratio is indicated to be lean, the feedback control adjusts the air/fuel mixture in a first large step and then a number of smaller incremental steps. In a second normal-operational mode, when adjustments to the air/fuel ratio is indicated to be rich, the feedback control adjusts the air/fuel mixture in a first large and then several smaller incremental steps, these steps being larger and more closely spaced in time than their respective counterpart steps in the lean-set mode.
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Dolinar Andrew M.
Sanshin Kogyo Kabushiki Kaisha
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