COMBUSTION CONTROL DEVICE FOR GAS ENGINE

摘要

An object is to prevent an engine from entering an unstable combustion state such as misfire upon recovery, by halting or reducing gas fuel for a cylinder in which knocking is occurring, and then increasing the gas fuel again to appropriately perform a recovery control upon recovery to the optimum operation. A combustion control device for a gas engine includes: a knocking determination unit 49 configured to determine occurrence of knocking of each of cylinders; a knocking reduction unit 55 configured to halt or reduce supply of gas fuel to a cylinder in which the knocking is occurring and reduce supply of the gas fuel to other cylinders in which the knocking is not occurring; a first recovery unit 57 configured to recover a state where the gas fuel is halted or reduced in the cylinder in which the knocking is occurring; and a second recovery unit 59 configured to recover a state where the gas fuel is reduced in the other cylinders which are not the cylinder in which the knocking is occurring. A recovery time of the first recovery unit 57 is shorter than a recovery time of the second recovery unit 59, and recovery of the cylinder in which the knocking is occurring is performed as a priority.

主权项

1. A combustion control device for a gas engine, comprising:
a knocking determination unit configured to determine occurrence of knocking of each of cylinders; a knocking reduction unit configured to halt or reduce supply of gas fuel to a cylinder in which the knocking is occurring and reduce supply of the gas fuel to other cylinders in which the knocking is not occurring, when the occurrence of the knocking is determined by the knocking occurrence determination unit; a first recovery unit configured to recover a state where the gas fuel is halted or reduced in the cylinder in which the knocking is occurring, when it is determined that the knocking is not occurring after the halt or reduction; and a second recovery unit configured to recover a state where the gas fuel is reduced in the other cylinders which are not the cylinder in which the knocking is occurring, wherein a recovery time of the first recovery unit is shorter than a recovery time of the second recovery unit, and recovery of the cylinder in which the knocking is occurring is performed as a priority.