Hybrid Work Machine and Method of Controlling Auto-Stop of Engine for the Same

摘要

A hybrid hydraulic excavator includes an engine, a generator motor, a capacitor, a cooling system being configured to cool the capacitor, and a controller. The cooling system includes a circulation mechanism being configured to circulate a cooling water, and a cooler being configured to cool the cooling water with output from the engine. The controller prohibits auto-stop of the engine when it is determined that the capacitor is overheated.

主权项

1. A hybrid work machine comprising:
an engine; a generator motor; a capacitor being configured to store electric power generated by the generator motor; a cooling system being configured to cool the capacitor, the cooling system comprising:
a circulation mechanism being configured to circulate a refrigerant through the capacitor, anda cooler being configured to cool the refrigerant with output from the engine; and a controller being configured to determine whether or not the capacitor is overheated to control auto-stop of the engine, the controller prohibiting the auto-stop of the engine when it is determined that the capacitor is overheated.