KR20170052236A - Construction equipment and method for detecting fail of a heating unit - Google Patents

Construction equipment and method for detecting fail of a heating unit Download PDF

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Publication number
KR20170052236A
KR20170052236A KR1020150154441A KR20150154441A KR20170052236A KR 20170052236 A KR20170052236 A KR 20170052236A KR 1020150154441 A KR1020150154441 A KR 1020150154441A KR 20150154441 A KR20150154441 A KR 20150154441A KR 20170052236 A KR20170052236 A KR 20170052236A
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KR
South Korea
Prior art keywords
electric heater
voltage value
battery
engine
preheating
Prior art date
Application number
KR1020150154441A
Other languages
Korean (ko)
Inventor
김기범
Original Assignee
두산인프라코어 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 두산인프라코어 주식회사 filed Critical 두산인프라코어 주식회사
Priority to KR1020150154441A priority Critical patent/KR20170052236A/en
Publication of KR20170052236A publication Critical patent/KR20170052236A/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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • 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
    • E02F9/2004—Control mechanisms, e.g. control levers
    • 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
    • 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
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • 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
    • E02F9/26—Indicating devices
    • E02F9/267—Diagnosing or detecting failure of vehicles

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

Disclosed is a construction machine. According to one embodiment of the present invention, the construction machine comprises: an ignition device; an electric heater to preheat an engine; a battery supplying electric energy to the electric heater; a preheat relay supplying and blocking the electric energy supplied from the battery to the electric heater; a voltage measurement unit measuring a voltage value of the battery; and a control unit determining a defect of the electric heater or the preheat relay when a difference value between the voltage value of the battery before the electric heater is operated and the voltage value of the battery while the electric heater is operated is less than a reference value.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for detecting a failure in a preheating unit of a construction machine and a construction machine,

The present invention relates to a method for detecting a failure of a preheating unit of a construction machine and a construction machine.

Generally, diesel engines are employed in construction machines such as excavators and wheel loaders. A diesel engine burns fuel in a compression ignition system that injects fuel while compressed air sucked into the cylinder is spontaneously ignited. Therefore, in order for the diesel engine to start smoothly, the temperature of the compressed air must be sufficiently high. However, when the temperature of the outside air is low as in winter, the heat generated by the compression of the air may be absorbed by the parts around the combustion chamber, such as the cylinder and the cylinder head, and may not form a sufficient temperature for ignition of the fuel. In this way, when the temperature of the air flowing into the combustion chamber is low, the starting performance of the engine may be lowered. Therefore, in order to smoothly start the engine in a low temperature environment, the diesel engine is provided with a preheating unit for preheating the intake air.

The preheating unit includes an electric heater for generating heat by electric energy, and a relay for supplying and blocking electric energy to the electric heater by a control signal. However, conventionally, a sensor was used to monitor whether the preheating unit was operating normally. To this end, a separate sensor from the preheating unit and electrical wiring connecting the sensor and the control unit must be provided. Therefore, additional cost is incurred for monitoring the normal operation of the preheating unit, and the structure of the construction machine becomes complicated.

KR 10-2015-0000555 A

The present invention provides a method of detecting a failure of a preheating unit of a construction machine and a construction machine capable of monitoring normal operation of a preheating unit without the need of a separate sensor for detecting the operation of the preheating unit .

According to an aspect of the present invention, An electric heater for preheating the engine; A battery for supplying electric energy to the electric heater; A preheating relay for supplying and blocking electric energy supplied from the battery to the electric heater; A voltage measuring unit for measuring a voltage value of the battery; And a control unit for determining that the electric heater or the preheat relay fails if the difference between the voltage value of the battery before the electric heater is activated and the voltage value of the battery during the operation of the electric heater is less than a reference value, Machine can be provided.

The memory may further include a memory for storing a voltage value of the battery.

The controller may further include a temperature sensor for sensing the temperature of the engine, and the controller may adjust an operation time of the electric heater according to the temperature of the engine.

In addition, the starter may include a preheating position and a starting position.

The controller may further include an alarm unit for informing the user of the failure of the electric heater or the preheat relay.

Further, an embodiment of the present invention is a construction machine including an electric heater for preheating an engine, a battery for supplying electric energy to the electric heater, and a preheating relay for supplying and blocking electric energy supplied from the battery to the electric heater Wherein the voltage value of the battery before the electric heater is operated is stored as a first voltage value; Operating the electric heater; Storing a voltage value of the battery as a second voltage value during operation of the electric heater; Determining whether a difference between the first voltage value and the second voltage value is less than a reference value; And determining that the electric heater or the preheat relay is faulty if the difference between the first voltage value and the second voltage value is less than the reference value, .

At this time, the temperature of the engine is measured. And calculating an operating time of the electric heater based on the temperature of the engine.

The method may further include generating an alarm when it is determined that the electric heater or the preheat relay is malfunctioning.

According to an embodiment of the present invention, it is possible to detect the failure of the electric heater or the preheat relay without the need of a separate sensor for detecting the operation of the electric heater or the preheating relay, so that the manufacturing cost of the construction machine is reduced, The structure is simplified.

1 is a block diagram of a construction machine according to an embodiment of the present invention.
2 is a flowchart of a preheating unit failure detection method of a construction machine according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present disclosure rather unclear.

1 is a block diagram of a construction machine according to an embodiment of the present invention. 1, a construction machine according to an embodiment of the present invention may include a starter 10, a preheating unit 20, a battery 30, a controller 40, and a voltage measuring unit 42 . The preheating unit 20 may include an electric heater 24 and a preheat relay 22. The construction machine according to an embodiment of the present invention may further include a memory 60, an alarm unit 70, a starter motor 54, a starter relay 52, and a temperature sensor 44.

The battery 30 can supply electric energy for operating the electric heater 24 and the starter motor 54. Electric energy supplied from the battery 30 can be supplied to the electric heater 24 and the starter motor 54 through the preheating relay 22 and the starter relay 52, respectively.

The electric heater 24 can be operated by the electric energy supplied from the battery 30 to heat the air sucked into the engine, the engine block or the inside of the combustion chamber. The electric heater 24 may include, for example, a glow plug, an air heater, a preheater, and the like.

The preheating relay 22 can be operated by a control signal to supply and cut off the electric energy supplied from the battery 30 to the electric heater 24. [ The control signal for activating the preheating relay 22 may be output from the starter 10 or the control unit 40.

The starting device 10 may be implemented in various manners, such as a rotary type and a button type, as means for selectively starting and stopping the engine by the user. The starter 10 may include at least a stop position, a preheat position, and a start position. In addition, the starter 10 may include other locations. For example, the starter 10 may include a location capable of supplying power to various devices of the construction machine.

The stop position is a basic position when the user does not operate the starter 10 while the engine is stopped. If the user turns the starter 10 to the stop position while the engine is running, the engine can be stopped have. The preheating position is provided to preheat the engine before starting the engine, and when the user switches the starter 10 to the preheating position, the controller 40 senses this and the electric heater 24 can be operated. At this time, the electric heater operation lamp may be turned on on the instrument panel while the electric heater 24 is operating, and the electric heater operation lamp may be turned off when the operation of the electric heater 24 is completed. Accordingly, the user can visually check whether the electric heater 24 is operating. The starting position is for starting the engine, and the engine is started when the user switches the starting device 10 to the starting position. It can be configured to be switched to the starting position after passing through the preheating position if necessary, and configured to be able to be driven to the starting position without going through the preheating position. The engine can be started when the starter 10 is switched to the start position by the user even if the preheating is in progress when the starter 10 is configured to be switched to the starter position after passing through the preheat position.

The starter motor 54 can be operated by the electric energy supplied from the battery 30 to start the engine. The electric energy supplied from the battery 30 to the starter motor 54 can be supplied and cut off by the starter relay 52. [ The starter relay 52 may be controlled by the starter 10 or the control unit 40. [

The voltage measuring unit 42 may measure the voltage of the battery 30 at a specific time and transmit the measured voltage to the controller 40. In this embodiment, the voltage of the battery 30 can be measured at least twice before the operation of the electric heater 24 and during operation. The control unit 40 may receive the voltage value of the battery 30 from the voltage measuring unit 42 and store the received voltage value in the memory 60. The voltage value of the battery 30 measured by the voltage measuring unit 42 may be stored in the memory 60 directly by the voltage measuring unit 42 as necessary. The voltage measuring unit 42 may be formed of a module separate from the control unit 40, but may be formed of a module integrated with the control unit 40.

The control unit 40 can determine whether the preheating unit 20 has failed based on the voltage value of the battery 30. [ Since the electric heater 24 operates by receiving electric energy from the battery 30, a voltage drop occurs in the battery 30 when the electric heater 24 is operated. Therefore, it is possible to determine whether the preheating unit 20 is operating normally through the magnitude of the voltage drop amount of the battery 30. That is, if the difference between the voltage value of the battery 30 before the electric heater 24 is activated and the voltage value of the battery 30 during the operation of the electric heater 24, that is, the voltage drop amount is greater than the reference value, It can be determined that the electric heater 22 operates normally and electric power is supplied to the electric heater 24 and the electric heater 24 also operates normally. On the other hand, if the voltage drop amount is less than the reference value, if the preheat relay 22 fails and no electric power is supplied to the electric heater 24, or even if the preheat relay 22 operates normally, . At this time, the reference value may be set to the minimum operating voltage of the electric heater 24. [

If it is determined that the electric heater 24 is malfunctioning, the control unit 40 can operate the alarm unit 70. The alarm unit 70 may generate an alarm in various forms to notify the user that the electric heater 24 has failed. The alarm unit 70 may be a visual alarm means such as a warning light or an audible alarm means such as a warning sound. In addition, the alarm unit 70 may be implemented in various forms.

Meanwhile, the construction machine according to an embodiment of the present invention can control the operation time of the electric heater based on the temperature information of the engine. For example, when the starter 10 is switched to the preheating position, the temperature sensor 44 may sense the coolant temperature and output it to the controller 40. The control unit 40 sets the operation time of the electric heater 24 to be long if the temperature of the cooling water is low and sets the operation time of the electric heater 24 to be long if the temperature of the cooling water is high, 24 can be different. In this way, the operating time of the electric heater 24 can be adjusted based on the temperature of the cooling water. However, in addition to the temperature of the cooling water, various values serving as an index of the engine temperature, such as the temperature of the engine oil, The operating time of the electric heater 24 may be adjusted.

2 is a flowchart of a preheating unit failure detection method of a construction machine according to an embodiment of the present invention. Referring to FIG. 2, a method of detecting a preheating unit failure of a construction machine according to an embodiment of the present invention will be described.

First, it is detected whether the starter 10 is switched to the preheating position (S10). When the starter 10 is switched to the preheating position, the preheating process for starting the engine can be performed. In the preheating step, the temperature of the engine can be firstly measured by the temperature sensor 44 (S30). The engine temperature measured by the temperature sensor 44 is transmitted to the control unit 40 and the control unit 40 can calculate the operation time of the electric heater 24 using the engine temperature information (S40). As described above, the temperature of the engine can be measured by measuring the cooling water temperature, the engine oil temperature, the fuel temperature, the intake air temperature, and the like. The step S30 of measuring the engine temperature and the step S40 of calculating the operating time of the electric heater 24 are not essential processes in the preheating unit failure detection method of the construction machine according to the embodiment of the present invention, It is possible.

After the calculation of the operating time of the electric heater 24 is completed, the voltage value of the battery 30 may be measured before operation of the electric heater 24 and stored in the memory 60 (S50). In this description, the voltage value of the battery 30 before the operation of the electric heater 24 is defined as the first voltage value. Although it has been described in the present embodiment that the measurement and the storage of the first voltage value S50 are performed after the calculation of the operating time S40 of the electric heater 24, But may be performed at various points of time before the electric heater 24 is operated.

When the first voltage value is stored, the electric heater 24 is operated during the operation time calculated by the control unit 40 (S60), and the battery 30 is operated at any time during the operation of the electric heater 24. [ (S70). In the present description, the voltage value of the battery 30 during the operation of the electric heater 24 is defined as the second voltage value. At this time, it is preferable that the second voltage value is measured after a predetermined time elapses from when the electric heater 24 starts operating. This is because the voltage of the battery 30 may not be stabilized at an initial stage when the electric heater 24 starts operating.

When the second voltage value is stored, the first voltage value may be compared with the second voltage value, and it may be determined whether the difference value of the positive value is less than the reference value (S80). If the difference between the first voltage value and the second voltage value, that is, the voltage drop amount is equal to or greater than the reference value, it is determined that the preheating unit 20 is normal. If the difference between the first voltage value and the second voltage value is less than the reference value, It can be determined that the unit 20 has failed (S90). If it is determined that the electric heater 24 is faulty, the alarm unit 70 can notify that the electric heater 24 or the preheating relay 22 is faulty (S100).

On the other hand, in some cases, the user can switch to the starting position immediately after switching the starter 10 to the preheat position. When the starter 10 is switched to the starting position before the completion of the measurement of the second voltage value, a voltage drop due to the operation of the starter motor 54 occurs. Therefore, the difference value between the first voltage value and the second voltage value It is impossible to detect whether or not the preheating unit 20 has failed. This is because the second voltage value can not be relied upon because the voltage drop due to the operation of the starter motor 54 is reflected to the second voltage value. Accordingly, if the starter 10 is switched to the starting position before the measurement of the second voltage value, the preheating unit failure detection method of the construction machine according to the embodiment of the present invention can be terminated (S20).

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. . Therefore, the present invention is not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Starting device 20: Preheating unit
22: preheating relay 24: electric heater
30: Battery 40:
42: voltage measuring unit 44: temperature sensor
52: starting relay 54: starting motor
60: Memory 70: Alarm unit

Claims (8)

Starter;
An electric heater for preheating the engine;
A battery for supplying electric energy to the electric heater;
A preheating relay for supplying and blocking electric energy supplied from the battery to the electric heater;
A voltage measuring unit for measuring a voltage value of the battery; And
And a control unit for determining that the electric heater or the preheat relay fails if the difference between the voltage value of the battery before the electric heater is activated and the voltage value of the battery during the operation of the electric heater is less than a reference value, . The method according to claim 1,
And a memory in which a voltage value of the battery is stored. The method according to claim 1,
Further comprising a temperature sensor for sensing a temperature of the engine,
Wherein the control unit adjusts the operating time of the electric heater according to the temperature of the engine. The method according to claim 1,
Further comprising an alarm unit for informing a user of a failure of the electric heater or the preheat relay. The method according to claim 1,
The starting device including a preheating position and a starting position. A construction machine including an electric heater for preheating an engine, a battery for supplying electric energy to the electric heater, and a preheating relay for supplying and blocking electric energy supplied from the battery to the electric heater,
Storing a voltage value of the battery before the electric heater is activated as a first voltage value;
Operating the electric heater;
Storing a voltage value of the battery as a second voltage value during operation of the electric heater;
Determining whether a difference between the first voltage value and the second voltage value is less than a reference value; And
And determining that the electric heater or the preheat relay is faulty if the difference between the first voltage value and the second voltage value is less than the reference value. The method according to claim 6,
The temperature of the engine being measured; And
Further comprising calculating an operating time of the electric heater based on the temperature of the engine. The method according to claim 6,
And generating an alarm when it is determined that the electric heater or the preheat relay is faulty.
KR1020150154441A 2015-11-04 2015-11-04 Construction equipment and method for detecting fail of a heating unit KR20170052236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150154441A KR20170052236A (en) 2015-11-04 2015-11-04 Construction equipment and method for detecting fail of a heating unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150154441A KR20170052236A (en) 2015-11-04 2015-11-04 Construction equipment and method for detecting fail of a heating unit

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KR20170052236A true KR20170052236A (en) 2017-05-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220155716A (en) 2021-05-17 2022-11-24 주식회사 난타 Banding device for easy adjustment of the bending angle
KR20230172968A (en) 2022-06-16 2023-12-26 주식회사 난타 Bending machine including control device using Hall sensor signal detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220155716A (en) 2021-05-17 2022-11-24 주식회사 난타 Banding device for easy adjustment of the bending angle
KR20230172968A (en) 2022-06-16 2023-12-26 주식회사 난타 Bending machine including control device using Hall sensor signal detection

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