CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE, WORK MACHINE AND CONTROL METHOD OF INTERNAL COMBUSTION ENGINE

摘要

When an internal combustion engine that is provided in a work machine and that serves as a power source for the work machine is controlled, the following lines are used: a first equal throttle line which is defined to correspond to a case where an amount of fuel injection for the internal combustion engine is maximum where the rotation speed of the internal combustion engine is the same and so that an output of the internal combustion engine becomes constant, a second equal throttle line which is defined to correspond to a case where the amount of fuel injection for the internal combustion engine is zero where the rotation speed of the internal combustion engine is the same and so that the torque decreases with increase of the rotation speed, and a third equal throttle line which is obtained from the first equal throttle line and the second equal throttle line.

主权项

1. A control device of an internal combustion engine, wherein when the control device controls the internal combustion engine that is provided in a work machine and that serves as a power source for the work machine,
the control device controls driving state of the internal combustion engine by using: a first relationship of a torque and a rotation speed of the internal combustion engine which is defined to correspond to a case where an amount of fuel injection for the internal combustion engine is maximum at each rotation speed of the internal combustion engine and so that an output at a rotation speed to generate a rated output of the internal combustion engine is equal to or more than the rated output; a second relationship of the torque and the rotation speed of the internal combustion engine which is defined to correspond to a case where the amount of fuel injection for the internal combustion engine is zero at each rotation speed of the internal combustion engine and so that the torque of the internal combustion engine decreases in accordance with increase of the rotation speed of the internal combustion engine, where a point where the torque and the rotation speed of the internal combustion engine are zero is defined as a start point; and a third relationship which is a relationship of the torque and the rotation speed of the internal combustion engine, which is obtained from the first relationship and the second relationship.