Patent application number | Description | Published |
20120246981 | HYDRAULIC SHOVEL AND METHOD OF CONTROLLING HYDRAULIC SHOVEL - A hydraulic shovel includes an engine; a hydraulic pump driven by the engine; an excavating attachment which is driven by high oil discharged from the hydraulic pump; a motor generator that assists a power supply of the engine; and an assist control unit that controls the motor generator to assist the engine in a latter part of the excavating operation by the excavating attachment. | 10-04-2012 |
20120315119 | SHOVEL AND METHOD OF CONTROLLING SHOVEL - A shovel includes an engine; a hydraulic pump driven by the engine; an attachment including a boom, the attachment being driven with hydraulic fluid discharged by the hydraulic pump; a motor generator configured to assist driving by the engine; an electric power accumulating part configured to accumulate electric power generated by the motor generator; a motion state detecting part configured to detect the motion state of the attachment; and an assist control part configured to control the execution of an assist by the motor generator using the electric power accumulated in the electric power accumulating part. The assist control part is configured to cause the motor generator to assist the engine during a boom raising motion after an excavation motion. | 12-13-2012 |
20130255243 | TURNING CONTROL APPARATUS - A turning control apparatus includes a turning body and a hydraulic motor to turn the turning body. A high-pressure relief circuit relieves hydraulic pressure of a first hydraulic line at a first relief pressure, the first hydraulic line supplying an operating oil to drive the hydraulic motor. A hunting reduction circuit relieves a hydraulic pressure of a second hydraulic line at a pressure lower than the first relief pressure, the second hydraulic line being connected to a deceleration-side hydraulic port from which the operating oil is discharged when the hydraulic motor is being driven. The hunting reduction circuit connected to the deceleration-side hydraulic port is caused to open before an operation lever to operate turning of the turning body returns to a neutral position. | 10-03-2013 |
20130345939 | SHOVEL AND METHOD FOR CONTROLLING SHOVEL - An hydraulic shovel according to the present invention includes a lower running body | 12-26-2013 |
20140058607 | SHOVEL AND METHOD OF CONTROLLING SHOVEL - A shovel includes an internal combustion engine, a hydraulic pump connected to the internal-combustion engine, a generator connected to the internal-combustion engine, and a control part that controls the generator. The control part increases an electric generation load of the generator before a hydraulic load of the hydraulic pump increases. | 02-27-2014 |
20140074337 | HYBRID WORK MACHINE AND METHOD OF CONTROLLING SAME - A hybrid work machine includes an engine, a motor generator connected to the engine, an electric energy storage unit configured to store electric power generated by the motor generator, and a control part configured to control driving of the motor generator. The control part is configured to control the driving of the motor generator so that an assist output of the motor generator increases, based on an external condition of the engine. | 03-13-2014 |
20140088839 | SHOVEL AND METHOD FOR CONTROLLING SHOVEL - A shovel includes a boom | 03-27-2014 |
20140107898 | HYBRID WORK MACHINE AND METHOD OF CONTROLLING SAME - A hybrid work machine includes a turning electric motor configured to turn an upper-part turning body, a hydraulic actuator, and a controller configured to control turning in a state of an independent turning operation by the turning electric motor and in a state of a combined turning operation by the turning electric motor and the hydraulic actuator. The controller is configured to limit the output of the turning electric motor in the state of the independent turning operation after a transition from the state of the combined turning operation to the state of the independent turning operation to an output smaller than the output of the turning electric motor in the state of the independent turning operation other than the state of the independent turning operation after said transition. | 04-17-2014 |
20140297106 | SHOVEL - A shovel includes a cabin in which a display monitor is provided, an upper-part turnable body that includes the cabin, an electric turning mechanism that causes the upper-part turnable body to turn, a turning electric motor that drives the electric turning mechanism, a detector that detects the state of driving of the electric turning mechanism, and a display control part configured to generate information to be displayed on the display monitor and cause the display monitor to display the generated information. The display control part is configured to calculate a physical quantity pertaining to an operation of the turning electric motor based on a detection value of the detector, generate turning operation display data for graphically representing the calculated physical quantity, and cause the display monitor to graphically display the generated turning operation display data. | 10-02-2014 |
20140297156 | SHOVEL - A shovel includes a cabin in which a display monitor is provided, a main pump that generates a hydraulic pressure, an internal combustion engine that drives the main pump, and a display control part configured to generate display information to be displayed on the display monitor based on information communicated between the display control part and the internal combustion engine, and cause the generated display information to be displayed on the display monitor. The display control part is configured to cause the fuel efficiency of the internal combustion engine to be displayed simultaneously in multiple graphs having different time axes on a single display screen. The graphs show the fuel efficiency of the internal combustion engine over time. | 10-02-2014 |
20140297160 | SHOVEL - A shovel includes a cabin in which a display monitor is provided, a main pump that generates a hydraulic pressure, an internal combustion engine that drives the main pump, and a display control part configured to generate display information to be displayed on the display monitor based on information communicated between the display control part and the internal combustion engine, and cause the generated display information to be displayed on the display monitor. The display control part is configured to cause a graph showing the fuel efficiency of the internal combustion engine over time and the operational work mode of the shovel corresponding to a time for which the fuel efficiency is calculated to be simultaneously displayed on the single display screen of the display monitor. | 10-02-2014 |
20150078872 | SHOVEL AND METHOD OF CONTROLLING SHOVEL - A shovel includes an internal combustion engine, a hydraulic pump connected to the internal-combustion engine, a generator connected to the internal-combustion engine, and a control part that controls the generator. The control part increases an electric generation load of the generator before a hydraulic load of the hydraulic pump increases. | 03-19-2015 |