Fuel injection control apparatus of internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsAkio Matsunaga, Mitsuhiro Nada, Yasuyuki Terada, Makio Tsuchiyama
Life of this patent
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Abstract
In one embodiment, a determination is made of whether or not in a condition in which a compressed gas temperature will reach a fuel self-ignition temperature by only a compression operation in the compression stroke, and in a case where the compressed gas temperature will reach the fuel self-ignition temperature, pilot injection is judged to be unnecessary, so this pilot injection is prohibited.
Claims5
A fuel injection control apparatus of a compression self-igniting internal combustion engine that, as an operation to inject fuel from a fuel injection valve, is capable of executing at least a main injection and a sub injection that is performed prior to the main injection, the fuel injection control apparatus comprising:
- a compressed gas temperature identification portion that estimates or detects a compressed gas temperature that only increases due to compression of gas in a cylinder during a compression stroke in a case where it is assumed that the sub injection is not executed;
- and
- a sub injection control portion that compares the compressed gas temperature estimated or detected by the compressed gas temperature identification portion to a fuel self-ignition temperature, and executes the sub injection prior to the main injection only when the compressed gas temperature is lower than the fuel self-ignition temperature.
A fuel injection control apparatus of a compression self-igniting internal combustion engine that, as an operation to inject fuel from a fuel injection valve, is capable of executing at least a main injection and a sub injection that is performed prior to the main injection, the fuel injection control apparatus comprising:
- a compressed gas temperature identification portion that estimates or detects a compressed gas temperature that only increases due to compression of gas in a cylinder during a compression stroke in a case where it is assumed that the sub injection is not executed;
- and
- a sub injection control portion that compares the compressed gas temperature estimated or detected by the compressed gas temperature identification portion to a fuel self-ignition temperature, and prohibits execution of the sub injection when the compressed gas temperature is at least the fuel self-ignition temperature.
Dependencies are inferred from the claim text.