ENGINE CONTROL DEVICE FOR HYBRID CONSTRUCTION MACHINERY, HYBRID CONSTRUCTION MACHINERY, AND ENGINE CONTROL METHOD FOR HYBRID CONSTRUCTION MACHINERY

摘要

In controlling an internal combustion engine which is an engine which generates power, and in which a generator motor is mounted to an output shaft for extracting generated power,this engine control device has the power generator motor generate power when both the following first and second conditions are met: a first condition which is determined to hold or not on the basis of a comparison between the actual engine speed of an internal combustion engine and the engine speed obtained from the first relation and a second relation; a second condition which is determined to hold or not on the basis of a comparison of torque of the internal combustion engine at the actual engine speed, and torque which is determined using a first relation at the actual engine speed. The first relation represents the relation between the engine speed of the internal combustion engine and the torque that the internal combustion engine can generate at each engine speed, and the second relation indicates the relation between the torque of the internal combustion engine and engine speed, and is used to stipulate the magnitude of the power generated by the internal combustion engine.