Control apparatus for internal combustion engine

摘要

A control apparatus for an internal combustion engine includes a fuel injection valve having a nozzle body that includes a fuel receiving part provided at a downstream side of a seat part with which a seat contact part comes into contact, and a plurality of nozzle holes. The control apparatus executes one or a plurality of small injections during one cycle in addition to main injection. Further, the control apparatus increases fuel injection amount of a first small injection at the current cycle at the time of low load operation while decreases the fuel injection amount of the first small injection at the time of high load operation, when post injection has not been executed in the last cycle and the small injection is executed first at the current cycle in a case in which a variation in the learned value for fuel injection amount is present.

主权项

1. A control apparatus for an internal combustion engine, comprising a fuel injection valve which is capable of directly injecting fuel into a cylinder,
wherein the fuel injection valve includes: a needle valve that has a seat contact part at its distal end; and a nozzle body that has a seat part with which the seat contact part comes into contact, a fuel receiving part formed at a downstream side of the seat part, and at least one nozzle hole formed at the downstream side of the seat part, wherein the control apparatus further comprises a controller that is programmed to: execute learning control of fuel injection amount for learning the fuel injection amount; execute, using the fuel injection valve, one or a plurality of small injections during one cycle in addition to main injection for generating a torque of the internal combustion engine; determine whether or not post injection has been executed at a last cycle of the internal combustion engine so as to determine whether it can be determined whether the fuel receiving part is in a liquid-tight state or a gas-tight state; and when post injection has not been executed at a last cycle of the internal combustion engine and the small injection is executed first at a current cycle in a case in which a variation in a learned value for fuel injection amount of the learning control is present, increase the fuel injection amount of a first small injection at the current cycle at a time of low load operation and decrease the fuel injection amount of the first small injection at a time of high load operation.