Fuel economy display device

Patent metadata

Field	Value
Publication number	US-10029630-B2
Application number	US-201414762752-A
Country	US
Kind code	B2
Filing date	Jan 22, 2014
Priority date	Jan 23, 2013
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A device for displaying fuel efficiency including: a plurality of sensors; an alternator; an engine control unit; a display unit configured to include at least one of an eco symbol displaying an instant amount of operation load, an eco gauge displaying average fuel efficiency, and a fuel efficiency system displaying instant fuel efficiency or average fuel efficiency; an equipment control unit configured to determine a current state of equipment, change and display the eco symbol of the display unit according to the current state of the equipment, calculate average fuel efficiency by using instant fuel efficiency and torque data calculated by the engine control unit, and display the calculated average fuel efficiency or instant fuel efficiency through the eco gauge and the fuel efficiency system of the display unit; and a memory unit configured to store the instant fuel efficiency and the average fuel efficiency.

First claim

The invention claimed is:

1. A device for displaying fuel efficiency of construction equipment, comprising:
a plurality of sensors configured to sense at least one of a displacement of a joystick, a hydraulic pressure, and a pressure of a pump, and transmit sensed information;
an engine control unit configured to calculate current engine revolutions per minute (RPM), instant fuel efficiency, and torque data;
a display unit configured to include an eco symbol displaying an instant amount of operation load;
an equipment control unit configured to
determine a current state of equipment based on the sensed information received from the plurality of sensors and the current engine RPM received from the engine control unit,
change and display a color of the eco symbol of the display unit according to the current state of the equipment, and
calculate the average fuel efficiency by using the instant fuel efficiency and the torque data calculated by the engine control unit; and

a memory unit configured to store the instant fuel efficiency and the average fuel efficiency,
wherein the equipment control unit changes the color of the eco symbol
when construction machinery is in a key-on state and the engine is not operated,
when the construction machinery is in a no-load state and the engine is operated,
when the construction machinery is in a middle-load state and the engine is operated,
when a pressure of the pump is equal to or larger than a predetermined pressure of a relief pressure, or
when the current engine RPM is equal to or smaller than minimum RPM for controlling the pump, that the minimum RPM is smaller than an engine RPM at the time of a pump control.

2. The device of claim 1 , wherein the equipment control unit is configured to
gather the instant fuel efficiency and the torque data,
assign a weighted value to each of the gathered instant fuel efficiency and the gathered torque data and sums the instant fuel efficiency and the torque data, and
calculate average fuel efficiency by calculating an average of the summed instant fuel efficiency and the summed torque data.

3. The device of claim 1 , further comprising:
a key switch configured to transmit key insertion information when a key is inserted, and
the display unit further comprises a fuel efficiency system displaying instant fuel efficiency or average fuel efficiency,
wherein when the equipment control unit receives the key insertion information from the key switch, the equipment control unit controls the display unit so that average fuel efficiency, maximum instant fuel efficiency and minimum instant fuel efficiency before a key insertion state, which are stored in the memory unit, are sequentially changed and displayed on the fuel efficiency system.

4. The device of claim 1 , further comprising:
an alternator configured to output a voltage representing rotary force of an engine,
the display unit further comprises a fuel efficiency system displaying instant fuel efficiency or average fuel efficiency,
wherein when the voltage output by the alternator is equal to or larger than a predetermined voltage, the equipment control unit controls the display unit so that current maximum instant fuel efficiency and minimum instant fuel efficiency are alternately displayed on the fuel efficiency system.

5. The device of claim 1 ,
the display unit further comprises a fuel efficiency system displaying instant fuel efficiency or average fuel efficiency,
wherein the equipment control unit controls the display unit so that a color of the eco symbol of the display unit is changed into any one of gray, green, yellow, and red according to a current state of equipment and displayed, and current instant fuel efficiency and minimum instant fuel efficiency are alternately displayed on the fuel efficiency system according to the change of the color of the eco symbol.

6. The device of claim 1 ,
the display unit further comprises a eco gauge displaying average fuel efficiency,
wherein the eco gauge is divided into a plurality of levels, and the plurality of levels is divided into a plurality of color regions for each operation mode, and
the equipment control unit controls the display unit so that current maximum instant fuel efficiency and minimum instant fuel efficiency are alternately displayed on the fuel efficiency system according to a change of the plurality of color regions.

7. The device of claim 6 , wherein the engine control unit makes the level of the eco gauge have a larger change according to the change of the average fuel efficiency in a region, in which average fuel efficiency is large, than a region, in which average fuel efficiency is small.

Assignees

• Doosan Infracore Co Ltd

Inventors

• Jang Jeong Kwon
• Yun Hong Cheol

Classifications

• G07C5/004

  Indicating the operating range of the engine (economical driving B60R16/0236, F02B77/084; measuring liquid fuel of an engine G01F9/00) · CPC title

• E02F9/267 Primary

  Diagnosing or detecting failure of vehicles · CPC title

• B60R16/0236 Primary

  for economical driving · CPC title

• E02F9/26

  Indicating devices {(E02F5/145 takes precedence)} · CPC title

• B60K35/00 Primary

  Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles · CPC title