Construction machine
First Claim
1. A construction machine comprising:
- an engine;
a power generator driven by the engine;
an electrical energy storage device that is charged by an output of the power generator, the electrical energy storage device compensating for a shortage of an output of the engine with respect to the workload while storing power generated by the power generator using a surplus of the output;
load detecting means for detecting the workload; and
display means that displays, toward an operator, load information according to a magnitude of the detected workload, wherein said load information comprises a sound according to the magnitude of the workload.
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Accused Products
Abstract
In a hybrid construction machine, its display device displays, toward an operator, an artificial engine sound serving as load information according to a magnitude of a workload, instead of an engine sound. Furthermore, the display device issues an alarm sound to surrounding workers when performing an operation by only stored electrical power of an electrical energy storage device without using an engine. In this hybrid construction machine, in addition to the issuing of alarm from the display device during the operation without using the engine, the display device issues an advance notice sound for engine restart when at least one value out of the workload and a charge amount of the electrical energy storage device has become an advance notice set value close to a set value of engine restart.
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Citations
8 Claims
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1. A construction machine comprising:
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an engine; a power generator driven by the engine; an electrical energy storage device that is charged by an output of the power generator, the electrical energy storage device compensating for a shortage of an output of the engine with respect to the workload while storing power generated by the power generator using a surplus of the output; load detecting means for detecting the workload; and display means that displays, toward an operator, load information according to a magnitude of the detected workload, wherein said load information comprises a sound according to the magnitude of the workload.
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2. A construction machine comprising:
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an engine; a power generator driven by the engine; an electrical energy storage device that is charged by an output of the power generator, the electrical energy storage device compensating for a shortage of an output of the engine with respect to the workload while storing power generated by the power generator using a surplus of the output; load detecting means for detecting the workload; and display means that displays, toward an operator, load information according to a magnitude of the detected workload, wherein the display means lights or flashes display lights having respective colors different in accordance with a magnitude of the workload.
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3. A construction machine comprising:
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an engine; a power generator driven by the engine; a motor driven by an output of the power generator;
an actuator operated by the motor;an electrical energy storage device that stores surplus power out of the output of the power generator; detecting means that detects at least one value out of a workload and a charge amount of the electrical energy storage device, as a factor in determining whether the engine is to be stopped or restarted, the detecting means being configured so that, when a value detected by the detecting means has reached an engine stop set value, the engine is automatically stopped and an operation is performed by only stored electrical power of the electrical energy storage device without using the engine, and that when the detected value has reached an engine restart set value, the engine is automatically restarted; and display means adapted to perform an advance notice display of an engine restart when the detected value has become an advance notice set value close to the engine restart set value, after the engine has been automatically stopped. - View Dependent Claims (4, 5, 6, 7)
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8. A construction machine comprising:
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an engine; a power generator driven by the engine; an electrical energy storage device that is charged by an output of the power generator, the electrical energy storage device compensating for a shortage of an output of the engine with respect to the workload while storing power generated by the power generator using a surplus of the output; load detecting means for detecting the workload; and display means that displays, toward an operator, load information according to a magnitude of the detected workload, wherein said load information comprises a displayed character selected according to the magnitude of the workload.
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Specification