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US 2015/0032314 A1Published application
Hybrid Work Machine and Method of Controlling Auto-Stop of Engine for the Same
AssigneeKomatsu Ltd.
InventorKenichi Kitamura
Life of this patent
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Abstract
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.
Claims8
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, and
- a 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.
5 more elements
A method of controlling an engine-auto-stop for a hybrid work machine, the hybrid work machine comprising:
- an engine;
- a generator motor;
- a capacitor being configured to store electric power generated by the generator motor, and
- 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, and
- a cooler being configured to cool the refrigerant with output from the engine, the method comprising prohibiting auto-stop of the engine when it is determined that the capacitor is overheated.
3 more elements
Dependencies are inferred from the claim text.