Internal combustion engine controller
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKoichi Ueda, Rentaro Kuroki, Shozo Yoshida
Life of this patent
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Abstract
If the combustion status detected in a steady state is partial combustion, the setting of a combustion status control parameter for the next cycle is adjusted so as to provide an increased degree of partial combustion. If, on the other hand, the detected combustion status is fast combustion, the setting of the control parameter for the next cycle is adjusted so as to provide an increased degree of fast combustion. The combustion status can be detected in accordance with an output parameter that correlates with the engine torque.
Claims16
An internal combustion engine controller, comprising:
- combustion status detection means for detecting the combustion status of each cylinder of an internal combustion engine in a steady state;
- combustion status variation means for judging an excessive combustion variation for an individual cylinder;
- and
- control parameter adjustment means for adjusting a control parameter concerning the combustion status after an excessive combustion variation has been judged;
- wherein, when the detected combustion status for the individual cylinder is a partial combustion state, said control parameter adjustment means adjusts a setting of said control parameter for the next cycle of the individual cylinder so as to restrain fast combustion from occurring in the next cycle by delaying ignition timing for the next cycle.
An internal combustion engine controller, comprising:
- combustion status detection means for detecting the combustion status of each cylinder of an internal combustion engine in a steady state;
- combustion status variation means for judging an excessive combustion variation for an individual cylinder;
- and
- control parameter adjustment means for adjusting a control parameter concerning the combustion status after an excessive combustion variation has been judged;
- wherein, when the detected combustion status for the individual cylinder is a fast combustion state, said control parameter adjustment means adjusts a setting of said control parameter for the next cycle of the individual cylinder so as to restrain partial combustion from occurring in the next cycle by advancing ignition timing for the next cycle.
An internal combustion engine controller, comprising:
- output parameter detection means for detecting an output parameter for each cylinder of an internal combustion engine that correlates with engine torque in a steady state;
- variation judgment means for judging the degree of detected value variation of said output parameter in a plurality of previous cycles of the cylinders;
- and
- control parameter adjustment means for adjusting a control parameter concerning the magnitude of said output parameter after an excessive variation for an individual cylinder is judged by the variation judgment means;
- wherein, when the detected value of said output parameter is below a predetermined range, said control parameter adjustment means adjusts a setting of said control parameter for the next cycle of the individual cylinder so as to increase the value of said output parameter without exceeding the predetermined range by delaying ignition timing for the next cycle;
- and
- wherein, when the detected value of said output parameter is above said predetermined range, said control parameter adjustment means adjusts the setting of said control parameter for the next cycle of the individual cylinder so as to decrease the value of said output parameter without exceeding the predetermined range by advancing ignition timing for the next cycle.
Dependencies are inferred from the claim text.