Engine control apparatus for executing Barycentric Position Control and specific control
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroshi Oyagi, Akira Yamashita, Kazuyasu Iwata
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Abstract
A control apparatus is provided, which controls combustion state such that the Heat Release Rate Barycentric Position (Gc) coincides with the Target Barycentric Position (Gc*), and which can prevent an increase in the combustion noise caused by an increase in an ignition lag which occurs in a case where an EGR apparatus is in execution, and, a rotational speed is low or an engine load is low. The control apparatus (ECU70) prevents the increase in the ignition lag by increasing a supercharging pressure of a supercharger (44) which the engine (10) is equipped with, thus, it prevents the increase in the combustion noise.
Claims6
An engine control apparatus applied to an internal combustion engine having an EGR apparatus, said engine control apparatus comprising a control section which sets combustion parameters which control a combustion state of said engine, wherein,
- said control section is configured to:
- execute a specific control, said specific control not being based on Barycentric Position Control, to set some of said combustion parameters to values which are different from certain values respectively set in a case where Barycentric Position Control is in execution for said combustion parameters such that a maximum value of an increasing amount per unit time of an in-cylinder pressure is lower than a maximum value of an increasing amount per unit time of an in-cylinder pressure in a case where said Barycentric Position Control is in execution and then said Heat Release Rate Barycentric Position becomes different from said constant reference crank angle, when an EGR is in execution, and, a load of said engine is lower than a predetermined load threshold or a rotational speed of said engine is lower than a predetermined rotational speed threshold.
Dependencies are inferred from the claim text.