Injection pre-adjustment for piston cooling in engines with spark ignition and direct injection

摘要

An engine system (300) comprising: a temperature determination module (304) that determines a piston temperature; a temperature comparison module (306) that compares the bulb temperature and a temperature threshold; and a fuel injection control module (308) that adjusts a timing of fuel injection from a first region (202) of an intake stroke (204) to a second region (206) of the intake stroke (204) when the piston temperature is greater than or equal to the temperature threshold wherein the first region (202) and the second region (206) do not overlap and the second region (206) is closer to a top dead center (TDC) of the intake stroke (204) than the first region (202).