Display Unit of Work Machine and Work Machine Mounted with the Display Unit

• US 20140058635A1
• Filed: 08/16/2012
• Published: 02/27/2014
• Est. Priority Date: 09/29/2011
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Tajima, Kentarou, Furukawa, Jiro
• Granted Patent: US 9,026,317 B2
• Time in Patent Office: Days
• US Class Current: 701/50
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60R 16/02 electric constitutive elements
• CPC Class Codes: B60R 16/0236 for economical driving
• CPC Class Codes: E02F 9/26 Indicating devices E02F5/145 takes precedence
• CPC Class Codes: E02F 9/267 Diagnosing or detecting failure of vehicles
• CPC Class Codes: G01F 9/00 Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration

Abstract

A multimonitor (display unit) is mounted in a mobile construction machine including an undercarriage and working equipment each driven by an engine, the multimonitor receiving a data of instant fuel consumption from a controller for controlling a fuel quantity to be supplied to the engine. The multimonitor includes a display including a single eco gauge (fuel-consumption indicator) for displaying fuel consumption in a street mode in which an undercarriage is operated and fuel consumption in a work mode in which working equipment is operated, a 100%-gauge fuel-consumption calculator that calculates a full-scale fuel consumption value in a full scale of the eco gauge based on target fuel consumption in the respective modes, and a gauge-display-value calculator that calculates a ratio of the instant fuel consumption to the 100% fuel consumption calculated by the 100%-gauge fuel-consumption value calculator.

Claims

1. A work machine display unit mounted in a mobile work machine comprising an undercarriage and working equipment that are each driven by an engine, the display unit receiving data of instant fuel consumption from an engine controller that controls a fuel quantity to be supplied to the engine, the display unit comprising:

a single fuel-consumption indicator that displays fuel consumption in a street mode in which the undercarriage is operated and fuel consumption in a work mode in which the working equipment is operated;

a full-scale fuel-consumption value calculator that calculates a fuel consumption value at a full scale of the fuel-consumption indicator using a scale conversion coefficient for converting one of the target consumption in the street mode and the target consumption in the work mode into the other of the target consumption in the street mode and the target consumption in the work mode; and

a gauge-display-value calculator that calculates a ratio of the instant fuel consumption to the fuel consumption at the full scale calculated by the full-scale fuel-consumption value calculator.

2. The work machine display unit according to claim 1, further comprising:

a scale-conversion-coefficient setting table in which the scale conversion coefficient is set.

3. The work machine display unit according to claim 2, wherein

the mobile work machine comprises a mode determining section that determines whether an operation mode of the mobile work machine is the street mode or the work mode

the mode determining section determines that the mobile work machine is in the street mode and sends information that the mobile work machine is in the street mode to the display unit, when it is determined that:

(1) a swing position detector that is provided in the mobile work machine and detects a position of an upper swing body of the mobile work machine in a swing direction detects that the upper swing body is at a predetermined position;

(2) a working equipment lock unit that is provided in the mobile work machine and locks an operation of the working equipment of the mobile work machine outputs an operation signal for locking the working equipment; and

(3) a suspension cylinder lock unit that is provided to the mobile work machine and frees an operation of a suspension cylinder of the undercarriage of the mobile work machine outputs an operation signal for freeing the suspension cylinder, and

when the full-scale fuel-consumption value calculator of the display unit receives the information indicating that the mobile work machine is in the street mode, the full-scale fuel-consumption value calculator reads out a scale conversion coefficient corresponding to the street mode from the scale conversion coefficient setting table and calculates the fuel consumption value at the full scale.

4. The work machine display unit according to claim 1, wherein

the single fuel-consumption indicator displays current instant fuel consumption in a bar at an end portion of the display together with a target fuel-consumption line.

8. The work machine according to claim 1, wherein

the single fuel-consumption indicator of the display unit displays current instant fuel consumption in a bar at an end portion of the display together with a target fuel-consumption line.

5. A mobile work machine comprising:

an engine;

an undercarriage and working equipment each driven by the engine;

a display unit; and

an engine controller that controls a fuel quantity to be supplied to the engine, wherein the display unit comprises;

a single fuel-consumption indicator that is adapted to receive a data of instant fuel consumption from the engine controller and displays fuel consumption in a street mode in which the undercarriage is operated and fuel consumption in a work mode in which the working equipment is operated;

a full-scale fuel-consumption value calculator that calculates a fuel consumption value at a full scale of the fuel-consumption indicator using a scale conversion coefficient for converting one of the target consumption in the street mode and the target consumption in the work mode into the other of the target consumption in the street mode and the target consumption in the work mode; and

a gauge-display-value calculator that calculates a ratio of the instant fuel consumption to the fuel consumption at the full scale calculated by the full-scale fuel-consumption value calculator.

6. The work machine according to claim 5, wherein:

the display unit comprises a scale-conversion-coefficient setting table in which the scale conversion coefficient is set.

7. The work machine according to claim 6, wherein:

the mobile work machine comprises a mode determining section that determines whether an operation mode of the mobile work machine is the street mode or the work mode, wherein

the mode determining section determines that the mobile work machine is in the street mode and sends information that the mobile work machine is in the street mode to the display unit, when it is determined that;

(1) a swing position detector that is provided in the mobile work machine and detects a position of an upper swing body of the mobile work machine in a swing direction detects that the upper swing body is at a predetermined position;

(2) a working equipment lock unit that is provided in the mobile work machine and locks an operation of the working equipment of the mobile work machine outputs an operation signal for locking the working equipment; and

(3) a suspension cylinder lock unit that is provided to the mobile work machine and frees an operation of a suspension cylinder of the undercarriage of the mobile work machine outputs an operation signal for freeing the suspension cylinder, and

when the full-scale fuel-consumption value calculator of the display unit receives the information indicating that the mobile work machine is in the street mode, the full-scale fuel-consumption value calculator reads out a scale conversion coefficient corresponding to the street mode from the scale conversion coefficient setting table and calculates the fuel consumption value at the full scale.