KR102024382B1 - Method and Apparatus for Controlling Engine of Construction Vehicle - Google Patents

Method and Apparatus for Controlling Engine of Construction Vehicle Download PDF

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Publication number
KR102024382B1
KR102024382B1 KR1020120149400A KR20120149400A KR102024382B1 KR 102024382 B1 KR102024382 B1 KR 102024382B1 KR 1020120149400 A KR1020120149400 A KR 1020120149400A KR 20120149400 A KR20120149400 A KR 20120149400A KR 102024382 B1 KR102024382 B1 KR 102024382B1
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KR
South Korea
Prior art keywords
rpm
engine
vehicle
working pressure
engine rpm
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KR1020120149400A
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Korean (ko)
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KR20140080868A (en
Inventor
장정권
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두산인프라코어 주식회사
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Priority to KR1020120149400A priority Critical patent/KR102024382B1/en
Publication of KR20140080868A publication Critical patent/KR20140080868A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2062—Control of propulsion units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The present invention relates to an engine control method and apparatus for a construction vehicle, comprising: a key switch configured to perform a switching operation to turn on or off a vehicle; A cutoff switch configured to detect an electric current flowing through the key switch and determine whether a vehicle is operated; A pressure sensor for measuring a working pressure of the vehicle; When the RPM control function for setting the engine RPM according to the auto idle function and the pressure is selected, it is determined whether the vehicle is working through the cut-off switch, and when the vehicle is in operation, the engine according to the working pressure measured using the pressure sensor. A vehicle controller configured to set the RPM; And an engine controller for controlling the RPM of the engine according to the engine RPM set by the vehicle controller.

Description

Method and apparatus for controlling engine of construction vehicle {Method and Apparatus for Controlling Engine of Construction Vehicle}

The present invention relates to a construction vehicle, and more particularly, to an engine control method and apparatus for a construction vehicle that can reduce unnecessary fuel consumption in a section other than a fast working section requiring a maximum flow rate.

In general, when the engine is turned on in a construction vehicle including an excavator, the engine is operated at an engine starting RPM set in a vehicle control unit (VCU), and an operator works through an engine control dial in the driver's seat. After setting the engine RPM (for example, 2000 ~ 25000 RPM), various tasks are performed.

When the work is stopped, the engine is operated at a lower level of the auto idle engine RPM (eg 1200 RPM) than the work engine RPM set by the operator after a certain period of time. When the engine is running at a lower idle engine RPM (eg 800 RPM) than the auto idle engine RPM, the fuel economy is improved.

1 is a view showing the configuration of an engine control apparatus of a conventional construction vehicle.

Referring to FIG. 1, a conventional engine control apparatus for a construction vehicle includes an auto idle input device 110 for setting an auto idle engine RPM and a key switch (Start Switch) 120 of a driver's seat. It is connected to an engine control unit (ECU) 130 that controls the RPM, and the engine control dial 150 of the driver's seat is connected to the engine control unit through the vehicle control unit 160. It is configured to be connected to 130.

The vehicle controller 160 transmits an RPM switching signal to the engine controller 130, and the engine controller 130 automatically converts the work engine RPM into the auto idle engine RPM or automatically converts the auto idle engine RPM into the idle engine RPM.

Meanwhile, in the related art, in order to control a work speed while an operator uses an excavator, the work speed is controlled by controlling the RPM of the pump connected to the engine by using an engine control dial or a pedal to adjust the discharge flow rate itself. It was.

However, when the work engine RPM is fixed by using the engine control dial in the related art, when the work is completed and the machine returns to the work ready state with little load on the equipment or when the joystick lever is finely operated for fine work, the RPM value is The excessive state has been disadvantageous in terms of fuel economy and work.

The present invention has been made to solve the problems described above, and provides an engine control method and apparatus for a construction vehicle that can improve fuel economy by reducing unnecessary fuel consumption in a section other than a fast working section that requires a maximum flow rate. Its purpose is to.

Another object of the present invention is to provide a method and apparatus for controlling an engine of a construction vehicle, which allows fine operation as the operation stroke of the joystick lever increases during fine operation.

According to a first aspect of the present invention, an engine control apparatus for a construction vehicle according to the present invention includes: a key switch for performing a switching operation to turn on or off a vehicle; A cutoff switch configured to detect an electric current flowing through the key switch and determine whether a vehicle is operated; A pressure sensor for measuring a working pressure of the vehicle; When the RPM control function for setting the engine RPM according to the auto idle function and the pressure is selected, it is determined whether the vehicle is working through the cut-off switch, and when the vehicle is in operation, the engine according to the working pressure measured using the pressure sensor. A vehicle controller configured to set the RPM; And an engine controller for controlling the RPM of the engine according to the engine RPM set by the vehicle controller.

According to a second aspect of the present invention, an engine control method for a construction vehicle according to the present invention includes determining whether an auto idle function is selected; When the auto idle function is selected, determining whether to select an RPM control function for setting the engine RPM according to the pressure; When the RPM control function is selected, determining whether a vehicle is in operation; When the vehicle is in operation, measuring a working pressure of the vehicle; Setting the engine RPM according to the measured working pressure; And controlling the RPM of the engine according to the set engine RPM.

As described above, according to the present invention, by providing an engine control method and apparatus for a construction vehicle that changes the engine RPM variably during low load work or fine work, unnecessary fuel in a section other than a fast work section requiring a maximum flow rate It has the effect of improving fuel economy by reducing consumption.

1 is a view showing the configuration of an engine control apparatus for a conventional construction vehicle;
2 is a view showing a schematic configuration of an engine control apparatus for a construction vehicle according to an embodiment of the present invention;
3 is a flowchart illustrating an engine control method of a construction vehicle according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

An engine control apparatus for a construction vehicle according to the present invention sets an idle engine RPM to an engine RPM when the vehicle is idle, and provides an auto idle function for controlling the RPM of the engine according to the set engine RPM.

In addition, the engine control apparatus according to the present invention measures the working pressure of the vehicle when the vehicle is in operation, sets the engine RPM according to the measured working pressure, and has an RPM control function for controlling the RPM of the engine according to the set engine RPM. to provide.

Hereinafter, an engine control method and apparatus for a construction vehicle according to the present invention will be described in detail.

2 is a view showing a schematic configuration of an engine control apparatus for a construction vehicle according to an embodiment of the present invention.

Referring to FIG. 2, an engine control apparatus according to the present invention includes a key switch (Starter Switch) 210, a pilot cut-off switch (220), a pressure sensor 230, and a vehicle control unit (VCU). A unit 240, an engine control unit (ECU) 250, an alternator 260, a battery 270, and the like.

The key switch 210 is provided in the construction vehicle, and is sequentially converted to a power source position, a center position, and a starting position for turning on and off the vehicle to perform a switching operation. The key switch 210 is generally provided inside the cabin and is formed to be operated by a driver in the cabin. However, the key switch 210 may be installed outside the cabin according to a design. The key switch 210 is generally converted into a power source position, a center position and a starting position while being rotated after inserting a key into the hollow groove, but may be implemented in various forms such as a smart key.

The cutoff switch 220 detects the current flowing in the key switch 210 to determine whether the vehicle is in operation and outputs a signal corresponding to the operation of the vehicle.

The pressure sensor 230 measures the working pressure of the vehicle.

The vehicle control unit 240 according to the present invention operates in three ways depending on whether the auto idle function and the RPM control function are selected.

First, when the auto idle function is not selected, the vehicle control unit 240 sets the engine RPM according to the command of the engine control dial.

Second, when the auto idle function is selected and the RPM control function is not selected, the vehicle controller 240 sets the idle engine RPM to the engine RPM when the vehicle is idle according to the signal output from the cutoff switch 220. do.

Third, when the auto idle function and the RPM control function are selected, the vehicle control unit 240 may control the working pressure measured using the pressure sensor 230 when the vehicle is in operation according to a signal output from the cutoff switch 220. Set the engine RPM accordingly.

In detail, the vehicle controller 240 sets the preset maximum RPM to the engine RPM when the working pressure measured using the pressure sensor 230 is equal to or larger than the preset reference value. That is, the vehicle controller 240 sets the preset maximum RPM to the engine RPM in the case of a high load operation.

In addition, the vehicle controller 240 sets the engine RPM corresponding to the measured working pressure using the pressure sensor 230 when the working pressure measured using the pressure sensor 230 is less than a preset reference value. That is, the vehicle control unit 240 according to the present invention sets the engine RPM corresponding to the measured working pressure using the pressure sensor 230 in the case of light load and fine work.

The engine controller 250 controls the RPM of the engine according to the engine RPM set by the vehicle controller 240.

The alternator 260 is a device that generates electric energy by using the rotational force of the engine in the construction vehicle that has been started, and stores electrical energy in the battery 270. The alternator 260 may also be called a generator or generator. The alternator 260 may be implemented in various ways, but using a pulley driving method using a belt so that the pinion gear transmits power to the engine and the pulley is connected to the crank shaft of the engine to receive power from the engine by driving the belt pulley. Can be formed.

The battery 270 is also referred to as a storage battery and is a storage of electrical energy provided in a construction vehicle to store electrical energy and supplying power where it is used whenever necessary. In addition, the battery 270 is an emergency power supply for supplying power when the alternator 260 does not generate electricity and does not supply sufficient current. The battery 270 may also supply power when the engine is stopped and the ignition is turned off. It also performs the function of balancing and storing. Battery 270 generally uses a secondary cell that is difficult to reuse before being charged by alternator 280.

3 is a flowchart illustrating an engine control method of a construction vehicle according to an embodiment of the present invention.

Referring to FIG. 3, it is determined whether the auto idle function is selected (S310). When the auto idle function is not selected, the engine RPM is set according to the command of the engine control dial (S312).

When the auto idle function is selected, it is determined whether the RPM control function is selected (S320). When the RPM control function is not selected, it is determined whether the vehicle is in operation (S322), and when the vehicle is in operation, the preset maximum RPM is determined. Set to the engine RPM (S324). When the vehicle is idle, the idle engine RPM is set to the engine RPM (S321).

When the RPM control function is selected, it is determined whether the vehicle is in operation (S330), and if the vehicle is idle, the idle engine RPM is set to the engine RPM (S321).

As a result of the determination in step S330, when the vehicle is working, the working pressure of the vehicle is measured (S340).

Subsequently, it is determined whether the measured working pressure is less than the predetermined reference value (S350), and when the measured working pressure is equal to or more than the predetermined reference value, the predetermined maximum RPM is set as the engine RPM (S324).

When the measured working pressure is less than the predetermined reference value, the engine RPM is set according to the measured working pressure (S360).

Finally, the RPM of the engine is controlled according to the engine RPM set in steps S312, S324 and S360, respectively (S370).

The embodiments disclosed in the specification of the present invention are not intended to limit the present invention. The scope of the present invention should be construed by the claims below, and all techniques within the scope equivalent thereto will be construed as being included in the scope of the present invention.

210: key switch 220: cutoff switch
230: pressure sensor 240: vehicle control unit
250: engine control unit 260: alternator
270: battery

Claims (5)

A cutoff switch to determine whether the vehicle is in operation;
A pressure sensor for measuring a working pressure of the vehicle;
A vehicle controller configured to set an engine RPM based on whether an auto idle function and an RPM control function are selected, whether the vehicle is in operation, the work pressure, and the work engine RPM selected by the driver; And
An engine controller which controls the RPM of the engine according to the engine RPM set by the vehicle controller;
Including,
The control unit,
When the auto idle function and the RPM control function are selected and the working pressure is higher than or equal to a preset high load reference value, the engine RPM is set to a preset maximum RPM instead of the working engine RPM.
When the auto idle function and the RPM control function is selected and the working pressure is less than the predetermined high load reference value, the construction is set to an engine RPM that is variable in response to the change in the working pressure instead of the working engine RPM. Engine control unit for the vehicle.
The method of claim 1,
And a key switch configured to perform a switching operation for turning on and off the construction vehicle by a user's operation.
The cut-off switch detects the current flowing in the key switch, so that the control unit can determine whether the operation of the engine control device for a construction vehicle.
Determining whether the auto idle function is selected;
When the auto idle function is selected, determining whether to select an RPM control function for setting an engine RPM in consideration of pressure;
When the RPM control function is selected, determining whether a vehicle is in operation;
When the vehicle is in operation, measuring a working pressure of the vehicle;
Setting an engine RPM in consideration of the measured working pressure; And
Controlling the RPM of the engine according to the set engine RPM;
Including,
Setting the engine RPM in consideration of the working pressure,
When the working pressure is higher than or equal to the preset high load reference value, the preset maximum RPM is set to the engine RPM, and in the case of fine work where the working pressure is less than the preset high load reference value, the engine RPM is variable according to the working pressure measured by the pressure sensor. Engine control method for a construction vehicle to set up.
The method of claim 3,
If the auto idle function is selected and the vehicle is idle when it is determined that the RPM control function is not selected, the engine control of the construction vehicle, characterized in that for setting a predetermined idle engine RPM less than the engine RPM selected by the user. Way.
delete
KR1020120149400A 2012-12-20 2012-12-20 Method and Apparatus for Controlling Engine of Construction Vehicle KR102024382B1 (en)

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Application Number Priority Date Filing Date Title
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KR102024382B1 true KR102024382B1 (en) 2019-11-04

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Publication number Priority date Publication date Assignee Title
WO2016153089A1 (en) * 2015-03-23 2016-09-29 볼보 컨스트럭션 이큅먼트 에이비 Engine idling control system of construction machine
KR102461072B1 (en) * 2016-03-23 2022-10-31 현대두산인프라코어 주식회사 Auto idle control apparatus and method for construction machinery

Citations (1)

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Publication number Priority date Publication date Assignee Title
KR100673273B1 (en) * 2006-03-31 2007-01-24 주식회사 한우티엔씨 Circuit for actuating air compressor to prevent electric discharge of battery for construction heavy machinery

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Publication number Priority date Publication date Assignee Title
KR0185537B1 (en) * 1996-01-29 1999-04-01 유광현 Control apparatus of hydraulic construction machine
KR101535301B1 (en) * 2008-12-19 2015-07-08 두산인프라코어 주식회사 Power control system for construction machinery

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100673273B1 (en) * 2006-03-31 2007-01-24 주식회사 한우티엔씨 Circuit for actuating air compressor to prevent electric discharge of battery for construction heavy machinery

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