WORK MACHINE
First Claim
1. A work machine comprising:
- a hydraulic pump driven by an engine;
a hydraulic actuator driven by pressure oil discharged from the hydraulic pump;
a generator motor interfacing with an output system of the engine;
a power storage unit for storing electric power when the generator motor is caused to operate as a generator by the engine and for supplying electric power when the generator motor operates as a motor; and
an electric actuator driven by the electric power supplied from the generator motor or the power storage unit, whereinthe hydraulic actuator and the electric actuator are operated according to operation of an operating lever, andthe work machine includes an idling stop control unit having;
an operating lever monitoring unit for monitoring an operated state of the operating lever during operation of the engine;
a neutral state timing unit for measuring a time for which the operating lever is in a neutral state;
an idling stop unit for stopping idling of the engine when the neutral state of the operating lever continues for a predetermined stop time; and
a machine operation prohibiting unit for retaining the electric actuator in an operation prohibited state when the idling stop unit stops the idling of the engine.
1 Assignment
0 Petitions
Accused Products
Abstract
A work machine includes: hydraulic actuators 21, 22, 23, 31, and 32; a capacitor 61 for storing electric power when a generator motor 44 operates as a generator and for supplying electric power when the generator motor 44 operates as a motor; and a swing electric motor 10, the hydraulic actuators 21, 22, 23, 31, and 32 and the swing electric motor 10 are operated by operation of operating levers 50, 70. The work machine includes an idling stop control unit 110 for stopping the idling of an engine 40 and retains the swing electric motor 10 in an operation prohibited state at least on the condition that stored voltage of the capacitor 61 is predetermined voltage or higher when the neutral states of the operating levers 50, 70 continue for a predetermined stop time during operation of the engine 40.
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Citations
10 Claims
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1. A work machine comprising:
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a hydraulic pump driven by an engine; a hydraulic actuator driven by pressure oil discharged from the hydraulic pump; a generator motor interfacing with an output system of the engine; a power storage unit for storing electric power when the generator motor is caused to operate as a generator by the engine and for supplying electric power when the generator motor operates as a motor; and an electric actuator driven by the electric power supplied from the generator motor or the power storage unit, wherein the hydraulic actuator and the electric actuator are operated according to operation of an operating lever, and the work machine includes an idling stop control unit having; an operating lever monitoring unit for monitoring an operated state of the operating lever during operation of the engine; a neutral state timing unit for measuring a time for which the operating lever is in a neutral state; an idling stop unit for stopping idling of the engine when the neutral state of the operating lever continues for a predetermined stop time; and a machine operation prohibiting unit for retaining the electric actuator in an operation prohibited state when the idling stop unit stops the idling of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification