WO2009145582A2 - Fuel-saving apparatus for industrial hydraulic machine - Google Patents

Fuel-saving apparatus for industrial hydraulic machine Download PDF

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Publication number
WO2009145582A2
WO2009145582A2 PCT/KR2009/002859 KR2009002859W WO2009145582A2 WO 2009145582 A2 WO2009145582 A2 WO 2009145582A2 KR 2009002859 W KR2009002859 W KR 2009002859W WO 2009145582 A2 WO2009145582 A2 WO 2009145582A2
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WO
WIPO (PCT)
Prior art keywords
hydraulic
pressure
pump
fluid
hydraulic cylinder
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PCT/KR2009/002859
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French (fr)
Korean (ko)
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WO2009145582A3 (en
Inventor
임창후
Original Assignee
Im Chang Hoo
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Priority claimed from KR2020080007160U external-priority patent/KR20080001986U/en
Application filed by Im Chang Hoo filed Critical Im Chang Hoo
Publication of WO2009145582A2 publication Critical patent/WO2009145582A2/en
Publication of WO2009145582A3 publication Critical patent/WO2009145582A3/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
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation

Definitions

  • the present invention relates to a hydraulic machine of an industrial vehicle such as a crane or an excavator, and in particular, to increase and decrease the engine output in response to a change in the pressure of a working device and at the same time when the pressure of the hydraulic pump is low and high pressure.
  • the present invention relates to a fuel saving device of an industrial hydraulic apparatus for saving fuel consumed as a whole by adjusting the injection volume of an engine according to the present invention.
  • the output torque of the engine is set in accordance with the maximum workload.
  • the height of the excavator tool is independent of the difference between the high pressure when the work tool is full of soil and the pressure difference when it is lowered, or the difference between the high pressure at the start of the rotation and the low pressure when it is about to stop. Since the engine power is matched to the pressure, unnecessary fuel consumption occurs.
  • the accelerator is not input for a predetermined time (for example, 5 seconds) while the engine is running, the engine speed is automatically lowered to the minimum speed (Idle RPM) to reduce unnecessary fuel consumption.
  • a predetermined time for controlling engine speed is fixedly set inside the vehicle.
  • the engine speed is lowered to the minimum speed, since the engine continues to run, there is a problem that the practical fuel saving effect is extremely insignificant.
  • An object of the present invention for solving the above problems relates to a hydraulic machine of an industrial vehicle such as a crane or an excavator, and in particular, to increase and decrease the engine output in response to the pressure change of the working device and at the same time the pressure of the hydraulic pump
  • the present invention provides a fuel saving device for an industrial hydraulic device to save fuel consumed as a whole by adjusting the injection volume of an engine according to a low pressure and a high pressure.
  • a fuel saving device of an industrial hydraulic apparatus for achieving the above object, the ECU for adjusting the fuel injection amount of the engine, the hydraulic cylinder for the operation of the injection pump for supplying the fuel of the hydraulic device,
  • a throttle valve provided on the discharge path of the fluid (oil) supplied to the hydraulic cylinder, and a relief valve provided on the fluid discharge path of the throttle valve and blocking or opening the recovery flow path.
  • a hydraulic pump for supplying a fluid having a constant pressure to the hydraulic cylinder, and a solenoid valve positioned on a delivery path of the fluid supplied from the hydraulic pump to the hydraulic cylinder and blocking or opening the fluid supply flow path.
  • the hydraulic pump is composed of a main pump and an auxiliary pump, the auxiliary pump to supply a fluid of a constant pressure to the hydraulic cylinder side through the solenoid valve;
  • a relay for adjusting an opening degree of the solenoid valve according to a state of an input voltage;
  • a pressure sensor for detecting a change and a magnitude of pressure according to the operation of the main pump;
  • An additional feature of the fuel saving device of the industrial hydraulic apparatus according to the present invention for achieving the above object is to close or connect the transmission path of the operation control power provided to the solenoid valve side in the relay or automatic mode or manual mode. It further comprises a switch for selecting the.
  • the operation state of the relay that is, the change and size of the pressure according to the operation of the main pump detected by the pressure sensor
  • Two or more variables for adjusting the engine RPM by providing a value of a variable resistor set in a dial manner to the ECU controlling the engine according to the case where the pressure of the main pump is high pressure and low pressure in a linear proportion.
  • the resistor is connected to the relay.
  • the engine output is increased and decreased in response to the pressure change of the working device and at the same time the pressure of the hydraulic pump is low and high pressure.
  • FIG. 1 is an exemplary view illustrating the construction of a hydraulic and electrical circuit of a fuel saving device of an industrial hydraulic apparatus according to the present invention.
  • the path represented by a thick solid line represents a hydraulic circuit according to the flow of fluid (oil), and is represented by a thin solid line.
  • the path displayed represents an electrical circuit for the control of the hydraulic circuit.
  • the accompanying Figure 1 is largely composed of a hydraulic circuit and an electric circuit, the hydraulic circuit corresponds to the background of the present invention as a conventional hydraulic circuit, it turns out that the feature configuration of the present invention is an electric circuit.
  • Hydraulic and electrical circuit configuration of the fuel saving device of the industrial hydraulic device according to the present invention can be divided into a hydraulic circuit and an electric circuit, as shown in Figure 1, the hydraulic circuit is for supplying the fuel of the industrial hydraulic equipment A hydraulic cylinder 24 for operating the injection pump 29, a throttle valve 23 provided on the discharge path of the fluid (oil) supplied to the hydraulic cylinder 24, and adjusting the hydraulic pressure in the hydraulic cylinder; A relief valve 22 provided on the fluid discharge path of the throttle valve 23 to block or open the recovery flow path, and a hydraulic pump 25 for supplying a constant pressure fluid to the hydraulic cylinder 24. And a solenoid valve 21 positioned on a delivery path of the fluid supplied from the hydraulic pump 25 to the hydraulic cylinder 24 and blocking or opening the fluid supply flow path.
  • reference numeral 26 is a hydraulic filter
  • 27 and 28 are rods for providing the operation of the hydraulic cylinder 24 to the injection pump 29 side
  • 16 is a hydraulic lake.
  • the hydraulic pump referred to by reference numeral 25 is composed of a main pump 12 and an auxiliary pump (11).
  • a pressure sensor 14 for sensing the size and the size an indicator 15 for receiving the detection signal of the pressure sensor 14 and distributing the power supplied from the battery (+ B), and the indicator 15.
  • variable resistors are connected to the relay 17.
  • the variable resistors are used to adjust the engine RPM according to the operating state of the relay 17 in a dial manner.
  • the operation state of the relay 17 is linearly proportional to the change and magnitude of the pressure according to the operation of the main pump 12 detected by the pressure sensor 14, the pressure of the main pump 12 is high pressure. According to one case and low pressure, the control signal is provided to the ECU controlling the engine accordingly.
  • the engine output is repeatedly increased and decreased in response to the pressure change of the hydraulic pump 25, and at the same time when the pressure state of the hydraulic pump is low and high pressure.
  • the engine of the excavator in the present invention is 1400 ⁇ 1550 RPM when the pressure of the working device is low and at high pressure at the engine speed at the time of excavator shipments
  • the hydraulic pump which is set to operate in close proximity and is referred to by reference numeral 25, is composed of a main pump 12 and an auxiliary pump 11, and the pressure sensor 14 controls the state of the pressure according to the operation of the main pump 12. Will be detected.
  • the signal according to the pressure state of the main pump 12 detected by the pressure sensor 14 is transmitted to the indicator 15, the pressure sensing signal input to the indicator 15, that is, in the main pump 12 According to the detection signal of the pressure sensor 14 for the generated pressure, the indicator 15 operates the relay 17.
  • the solenoid valve 21 is operated, and thus the oil pumped from the auxiliary pump 11 passes through the solenoid valve 21 through the hydraulic lake 16 and then is supplied to the hydraulic cylinder 24.
  • the hydraulic pump operates the injection pump 29 (fuel supply device) through a rod (or cable) referred to by reference numerals 27 and 28.
  • reference numeral 19 which is not described, refers to a switch for closing or connecting a transmission path of an operation control power provided from the relay 17 to the solenoid valve 21. to be.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

The present invention relates to an industrial hydraulic machine including a hydraulic cylinder for operating an injection pump for supplying fuel to the hydraulic machine, a throttle valve arranged on an outlet path of the fluid (oil) supplied to the hydraulic cylinder to adjust the hydraulic pressure in the hydraulic cylinder, a relief valve arranged on a fluid outlet path of the throttle valve to shut or open a relevant recovery channel, a hydraulic pump for supplying fluid of a predetermined pressure to the hydraulic cylinder, and a solenoid valve positioned on a transmission path of the fluid supplied to the hydraulic cylinder from the hydraulic pump to shut or open a fluid supply channel. Specifically, the hydraulic pump is comprised of a main pump and an auxiliary pump, and the auxiliary pump supplies fluid of a predetermined pressure to the hydraulic cylinder through the solenoid valve. A fuel-saving apparatus for an industrial hydraulic machine includes a relay for controlling degree of opening of the solenoid valve per condition of input voltage; a sensor for sensing variation and size of pressure in accordance with operation of the main pump; and an indicator for taking sensed signal input from the pressure sensor, and supplying power linearly from an internal battery of the industrial hydraulic machine to the relay in accordance with the size of the sensed signal. The fuel-saving apparatus repeats the raising and lowering of the engine output in accordance with the variation of the pressure of a work apparatus, and simultaneously controls the injection quantity for an engine per the pressure of the hydraulic pump at a low state and wherein the pressure of the hydraulic pump is at a high state, thereby reducing the overall consumption of fuel.

Description

산업용 유압기기의 연료 절감 장치Fuel saving device for industrial hydraulic equipment
본 발명은 크레인이나 굴삭기등과 같은 산업용 차량의 유압기계에 관한 것으로 특히, 작업장치의 압력변화에 맞추어 엔진출력을 높임과 낮춤을 반복함과 동시에 유압펌프의 압력상태가 저압일 경우와 고압일 경우에 맞추어 엔진의 분사량을 함께 조절함으로써 전체적으로 소모되는 연료를 절약하기 위한 산업용 유압기기의 연료 절감 장치에 관한 것이다.The present invention relates to a hydraulic machine of an industrial vehicle such as a crane or an excavator, and in particular, to increase and decrease the engine output in response to a change in the pressure of a working device and at the same time when the pressure of the hydraulic pump is low and high pressure. The present invention relates to a fuel saving device of an industrial hydraulic apparatus for saving fuel consumed as a whole by adjusting the injection volume of an engine according to the present invention.
일반적으로, 굴삭기나 지게차와 같은 종래의 산업용 차량은 작업 부하가 최대일 경우에 맞추어 엔진의 출력 토오크가 설정되어져 있다. In general, in the conventional industrial vehicle such as an excavator or a forklift truck, the output torque of the engine is set in accordance with the maximum workload.
예를 들어, 굴삭기의 경우 작업 장치에 흙을 가득 담아 올릴 때의 높은 압력과 내릴 때의 압력차이 혹은 회전을 시작할 때의 높은 압력과 멈추려고 할 때의 낮은 압력 차이와 관계없이 굴삭기 작업장치의 높은 압력에 엔진 출력이 맞추어져 있으므로 불필요한 연료의 소모가 발생되어진다.For example, for excavators, the height of the excavator tool is independent of the difference between the high pressure when the work tool is full of soil and the pressure difference when it is lowered, or the difference between the high pressure at the start of the rotation and the low pressure when it is about to stop. Since the engine power is matched to the pressure, unnecessary fuel consumption occurs.
이에 따라 엔진이 구동중인 상태에서 기 설정된 소정 시간(예를 들어, 5초) 동안 액셀러레이터의 입력이 발생하지 않으면 자동으로 엔진의 회전수를 최저 회전수(Idle RPM)로 낮춤으로써 불필요한 연료의 소비를 방지하도록 하는 기술이 제공되고 있으나, 이러한 종래의 엔진 제어 방법에서는 상술한 바와 같이 엔진 회전수 제어를 위해 기 설정된 소정 시간이 차량 내부에 고정 설정되어 있기 때문에 사용자가 이를 가변 설정할 수 없는 불편함이 있으며, 엔진 회전수를 최저 회전수로 낮추더라도 엔진이 계속해서 구동되기 때문에 실질적인 연료 절감 효과가 극히 미비하다는 문제점이 있다.Accordingly, if the accelerator is not input for a predetermined time (for example, 5 seconds) while the engine is running, the engine speed is automatically lowered to the minimum speed (Idle RPM) to reduce unnecessary fuel consumption. In order to prevent this, a conventional engine control method has been provided. However, as described above, a predetermined time for controlling engine speed is fixedly set inside the vehicle. However, even if the engine speed is lowered to the minimum speed, since the engine continues to run, there is a problem that the practical fuel saving effect is extremely insignificant.
상술한 문제점을 해소하기 위한 본 발명의 목적은 크레인이나 굴삭기등과 같은 산업용 차량의 유압기계에 관한 것으로 특히, 작업장치의 압력변화에 맞추어 엔진출력을 높임과 낮춤을 반복함과 동시에 유압펌프의 압력상태가 저압일 경우와 고압일 경우에 맞추어 엔진의 분사량을 함께 조절함으로써 전체적으로 소모되는 연료를 절약하기 위한 산업용 유압기기의 연료 절감 장치를 제공하는 데 있다.An object of the present invention for solving the above problems relates to a hydraulic machine of an industrial vehicle such as a crane or an excavator, and in particular, to increase and decrease the engine output in response to the pressure change of the working device and at the same time the pressure of the hydraulic pump The present invention provides a fuel saving device for an industrial hydraulic device to save fuel consumed as a whole by adjusting the injection volume of an engine according to a low pressure and a high pressure.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 산업용 유압기기의 연료 절감 장치의 특징은, 엔진의 연료 분사량을 조절하는 ECU와, 유압기기의 연료 공급을 위한 인젝션펌프의 작동을 위한 유압실린더와, A fuel saving device of an industrial hydraulic apparatus according to the present invention for achieving the above object, the ECU for adjusting the fuel injection amount of the engine, the hydraulic cylinder for the operation of the injection pump for supplying the fuel of the hydraulic device,
상기 유압실린더에 공급되어진 유체(기름)의 배출경로상에 구비되어 유압실린더내의 유압을 조정하는 스로틀밸브와, 상기 스로틀밸브의 유체 배출경로상에 구비되어 있으며 해당 회수유로를 차단 또는 개방하는 릴리프밸브와, 상기 유압실린더로 일정압력의 유체를 공급하기 위한 유압펌프, 및 상기 유압펌프에서 유압실린더측으로 공급하는 유체의 전달 경로 상에 위치하며 유체 공급 유로를 차단 또는 개방하는 솔레노이드밸브를 구비하는 산업용 유압기기에 있어서: A throttle valve provided on the discharge path of the fluid (oil) supplied to the hydraulic cylinder, and a relief valve provided on the fluid discharge path of the throttle valve and blocking or opening the recovery flow path. And a hydraulic pump for supplying a fluid having a constant pressure to the hydraulic cylinder, and a solenoid valve positioned on a delivery path of the fluid supplied from the hydraulic pump to the hydraulic cylinder and blocking or opening the fluid supply flow path. On the device:
상기 유압펌프는 메인펌프와 보조펌프로 구성하며, 보조펌프가 상기 솔레노이드밸브를 통해 유압실린더측에 일정 압력의 유체를 공급하도록 하되; 입력되는 전압의 상태에 따라 상기 솔레노이드밸브의 개방정도를 조절하는 릴레이와; 상기 메인펌프의 동작에 따른 압력의 변화와 크기를 감지하는 압력센서와; The hydraulic pump is composed of a main pump and an auxiliary pump, the auxiliary pump to supply a fluid of a constant pressure to the hydraulic cylinder side through the solenoid valve; A relay for adjusting an opening degree of the solenoid valve according to a state of an input voltage; A pressure sensor for detecting a change and a magnitude of pressure according to the operation of the main pump;
상기 압력센서의 감지신호를 입력받아 감지신호의 크기에 따라 선형적으로 산업용 유압기기의 내부 배터리에서 공급되는 전원을 상기 릴레이 측에 공급하는 인디게이터를 포함하는 데 있다.And an indicator for receiving the sensing signal of the pressure sensor and supplying power supplied from the internal battery of the industrial hydraulic apparatus to the relay side linearly according to the magnitude of the sensing signal.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 산업용 유압기기의 연료 절감 장치의 부가적인 특징은, 상기 릴레이에서 솔레노이드밸브측에 제공하는 작동 조절 전원의 전달경로를 폐쇄하거나 연결하여 자동모드 혹은 수동모드를 선택하기 위한 스위치를 더 포함하는 데 있다.An additional feature of the fuel saving device of the industrial hydraulic apparatus according to the present invention for achieving the above object is to close or connect the transmission path of the operation control power provided to the solenoid valve side in the relay or automatic mode or manual mode. It further comprises a switch for selecting the.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 산업용 유압기기의 연료 절감 장치의 부가적인 다른 특징은, 상기 릴레이의 동작 상태 즉, 압력센서에서 감지되는 메인펌프의 동작에 따른 압력의 변화와 크기에 선형적으로 비례하여 상기 메인펌프의 압력이 고압일 경우와 저압일 경우에 따라 엔진을 제어하는 ECU측에 다이얼 방식으로 설정된 가변저항을 값을 제공하여 엔진 RPM을 조정할 수 있도록 하기 위한 두 개 이상의 가변저항이 상기 릴레이에 연결되는 데 있다.Additional features of the fuel saving device of the industrial hydraulic apparatus according to the present invention for achieving the above object, the operation state of the relay, that is, the change and size of the pressure according to the operation of the main pump detected by the pressure sensor Two or more variables for adjusting the engine RPM by providing a value of a variable resistor set in a dial manner to the ECU controlling the engine according to the case where the pressure of the main pump is high pressure and low pressure in a linear proportion. The resistor is connected to the relay.
상술한 본 발명에 따른 특징으로 인해 기대되는 효과로는, 작업장치의 압력변화에 맞추어 엔진출력을 높임과 낮춤을 반복함과 동시에 유압펌프의 압력상태가 저압일 경우와 고압일 경우에 맞추어 엔진의 분사량을 함께 조절함으로써 전체적으로 소모되는 연료를 절약하게 된다.As expected effects due to the above-described features of the present invention, the engine output is increased and decreased in response to the pressure change of the working device and at the same time the pressure of the hydraulic pump is low and high pressure. By adjusting the injection volume together, it saves the fuel consumed as a whole.
도 1은 본 발명에 따른 산업용 유압기기의 연료 절감 장치의 유압 및 전기회로 구성 예시도1 is an exemplary configuration of the hydraulic and electrical circuit of the fuel saving device of the industrial hydraulic apparatus according to the present invention
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
29 : 인젝션펌프29: injection pump
24 : 유압실린더24: hydraulic cylinder
23 : 스로틀밸브23: throttle valve
22 : 릴리프밸브22: relief valve
25 : 유압펌프25: hydraulic pump
21 : 솔레노이드밸브21: solenoid valve
12 : 메인펌프12: main pump
11 : 보조펌프11: auxiliary pump
14 : 압력센서14 pressure sensor
15 : 인디게이터15 indicator
17 : 릴레이17: relay
19 : 스위치19: switch
본 발명의 상술한 목적과 여러 가지 장점은 이 기술 분야에 숙련된 사람들에 의해, 첨부된 도면을 참조하여 후술되는 본 발명의 바람직한 실시 예로부터 더욱 명확하게 될 것이다.The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.
이하, 본 발명의 바람직한 실시 예를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
첨부한 도 1은 본 발명에 따른 산업용 유압기기의 연료 절감 장치의 유압 및 전기회로 구성 예시도로서, 굵은 실선으로 표시되는 경로는 유체(기름)의 흐름에 따른 유압회로를 나타내는 것이며, 가는 실선으로 표시되는 경로는 상기 유압회로의 제어를 위한 전기회로를 나타낸다.1 is an exemplary view illustrating the construction of a hydraulic and electrical circuit of a fuel saving device of an industrial hydraulic apparatus according to the present invention. The path represented by a thick solid line represents a hydraulic circuit according to the flow of fluid (oil), and is represented by a thin solid line. The path displayed represents an electrical circuit for the control of the hydraulic circuit.
따라서 첨부한 도 1은 유압회로와 전기회로로 크게 구성되는데, 상기 유압회로는 통상의 유압회로로써 본 발명의 배경기술에 해당하며, 본발명의 특징 구성은 전기회로임을 밝혀둔다.Therefore, the accompanying Figure 1 is largely composed of a hydraulic circuit and an electric circuit, the hydraulic circuit corresponds to the background of the present invention as a conventional hydraulic circuit, it turns out that the feature configuration of the present invention is an electric circuit.
본 발명에 따른 산업용 유압기기의 연료 절감 장치의 유압 및 전기회로 구성은 도 1에 도시되어 있는 바와 같이, 크게 유압회로와 전기회로로 구분될 수 있는데, 유압회로는 산업용 유압기기의 연료 공급을 위한 인젝션펌프(29)의 작동을 위한 유압실린더(24)와, 상기 유압실린더(24)에 공급되어진 유체(기름)의 배출경로상에 구비되어 유압실린더내의 유압을 조정하는 스로틀밸브(23)와, 상기 스로틀밸브(23)의 유체 배출경로상에 구비되어 있으며 해당 회수유로를 차단 또는 개방하는 릴리프밸브(22)와, 상기 유압실린더(24)로 일정압력의 유체를 공급하기 위한 유압펌프(25)와, 상기 유압펌프(25)에서 유압실린더(24)측으로 공급하는 유체의 전달 경로 상에 위치하며 유체 공급 유로를 차단 또는 개방하는 솔레노이드밸브(21)로 구성된다.Hydraulic and electrical circuit configuration of the fuel saving device of the industrial hydraulic device according to the present invention can be divided into a hydraulic circuit and an electric circuit, as shown in Figure 1, the hydraulic circuit is for supplying the fuel of the industrial hydraulic equipment A hydraulic cylinder 24 for operating the injection pump 29, a throttle valve 23 provided on the discharge path of the fluid (oil) supplied to the hydraulic cylinder 24, and adjusting the hydraulic pressure in the hydraulic cylinder; A relief valve 22 provided on the fluid discharge path of the throttle valve 23 to block or open the recovery flow path, and a hydraulic pump 25 for supplying a constant pressure fluid to the hydraulic cylinder 24. And a solenoid valve 21 positioned on a delivery path of the fluid supplied from the hydraulic pump 25 to the hydraulic cylinder 24 and blocking or opening the fluid supply flow path.
이때 미설명 부호 26은 유압필터이며, 27과 28은 상기 유압실린더(24)의 동작을 상기 인젝션펌프(29)측에 제공하기 위한 로드이며, 16은 유압호수이다.At this time, reference numeral 26 is a hydraulic filter, 27 and 28 are rods for providing the operation of the hydraulic cylinder 24 to the injection pump 29 side, 16 is a hydraulic lake.
또한, 참조번호 25로 지칭되는 유압펌프는 메인펌프(12)와 보조펌프(11)로 구성된다.In addition, the hydraulic pump referred to by reference numeral 25 is composed of a main pump 12 and an auxiliary pump (11).
상술한 유압회로를 제어하기 위한 전기회로의 구성을 살펴보면, 전기회로의 구성요소들에 구동전원을 공급하기 위한 차량의 배터리(+B)와, 상기 메인펌프(12)의 동작에 따른 압력의 변화와 크기를 감지하는 압력센서(14)와, 상기 압력센서(14)의 감지신호를 입력받아 상기 배터리(+B)에서 공급되는 전원을 분배하는 인디게이터(15)와, 상기 인디게이터(15)에서 제공되는 전원에 의해 구동되어 상기 솔레노이드밸브(21)의 개방정도를 조절하는 릴레이(17)로 구성된다.Looking at the configuration of the electric circuit for controlling the above-described hydraulic circuit, the change of the pressure according to the operation of the battery (+ B) and the main pump 12 of the vehicle for supplying driving power to the components of the electric circuit And a pressure sensor 14 for sensing the size and the size, an indicator 15 for receiving the detection signal of the pressure sensor 14 and distributing the power supplied from the battery (+ B), and the indicator 15. It is composed of a relay 17 is driven by a power source to control the opening degree of the solenoid valve 21.
또한, 상기 릴레이(17)에는 2개의 가변저항이 연결되어지는데, 상기 가변저항은 다이얼 방식으로 상기 릴레이(17)의 동작 상태에 따라 엔진 RPM을 조정하기 위한 것이다.In addition, two variable resistors are connected to the relay 17. The variable resistors are used to adjust the engine RPM according to the operating state of the relay 17 in a dial manner.
즉, 상기 릴레이(17)의 동작 상태는 압력센서(14)에서 감지되는 메인펌프(12)의 동작에 따른 압력의 변화와 크기에 선형적으로 비례하기 때문에 상기 메인펌프(12)의 압력이 고압일 경우와 저압일 경우에 따라 엔진을 제어하는 ECU측에 그에 따른 제어신호를 제공하는 것이다.That is, since the operation state of the relay 17 is linearly proportional to the change and magnitude of the pressure according to the operation of the main pump 12 detected by the pressure sensor 14, the pressure of the main pump 12 is high pressure. According to one case and low pressure, the control signal is provided to the ECU controlling the engine accordingly.
이로써, 크레인이나 굴삭기등과 같은 산업용 차량의 유압기계에서 유압펌프(25)의 압력변화에 맞추어 엔진출력을 높임과 낮춤을 반복함과 동시에 유압펌프의 압력상태가 저압일 경우와 고압일 경우에 맞추어 엔진의 분사량을 함께 조절함으로써 전체적으로 소모되는 연료를 절약하게 되는 것이다.Thus, in the hydraulic machine of an industrial vehicle such as a crane or an excavator, the engine output is repeatedly increased and decreased in response to the pressure change of the hydraulic pump 25, and at the same time when the pressure state of the hydraulic pump is low and high pressure. By adjusting the injection volume of the engine together, the overall fuel consumption is saved.
상기와 같이 구성되는 본 발명에 따른 산업용 유압기기의 연료 절감 장치의 동작을 살펴보면, 본 발명에서 굴삭기의 엔진은 작업장치의 압력이 낮을 때는 1400~1550RPM으로 하고 높은 압력에서는 굴삭기 출고 당시의 엔진 속도에 근접하게 작동하도록 설정하며, 참조번호 25로 지칭되는 유압펌프는 메인펌프(12)와 보조펌프(11)로 구성되는데, 상기 메인펌프(12)의 동작에 따른 압력의 상태를 압력센서(14)에서 감지하게 된다.Looking at the operation of the fuel saving device of the industrial hydraulic equipment according to the present invention configured as described above, the engine of the excavator in the present invention is 1400 ~ 1550 RPM when the pressure of the working device is low and at high pressure at the engine speed at the time of excavator shipments The hydraulic pump, which is set to operate in close proximity and is referred to by reference numeral 25, is composed of a main pump 12 and an auxiliary pump 11, and the pressure sensor 14 controls the state of the pressure according to the operation of the main pump 12. Will be detected.
상기 압력센서(14)에서 감지되어진 메인펌프(12)의 압력상태에 따른 신호는 인디게이터(15)에 전달되어지는데, 상기 인디게이터(15)에 입력된 압력감지신호 즉, 상기 메인펌프(12)에서 생성되어진 압력에 대한 상기 압력센서(14)의 감지신호에 따라 상기 인디게이터(15)는 릴레이(17)를 작동시키게 된다.The signal according to the pressure state of the main pump 12 detected by the pressure sensor 14 is transmitted to the indicator 15, the pressure sensing signal input to the indicator 15, that is, in the main pump 12 According to the detection signal of the pressure sensor 14 for the generated pressure, the indicator 15 operates the relay 17.
이때 상기 인디게이터(15)에는 차량의 배터리 전원(+B)이 공급되고 있으므로, 상기 인디게이터(15)가 상기 릴레이(17)를 작동시킴에 따라 상기 인디게이터(15)에 공급되던 차량의 배터리 전원(+B)이 상기 릴레이(17)를 경유하여 솔레노이드밸브(21)에 공급되어진다.In this case, since the battery power (+ B) of the vehicle is supplied to the indicator 15, the battery power (+) of the vehicle supplied to the indicator 15 as the indicator 15 operates the relay 17. B) is supplied to the solenoid valve 21 via the relay 17.
따라서 상기 솔레노이드밸브(21)가 작동하게 되고, 이에 따라 상기 보조펌프(11)에서 펌핑되어지는 기름은 유압호수(16)를 통해 상기 솔레노이드밸브(21)를 통과한 후 유압실린더(24)로 공급되며, 상기 보조펌프(11)에서 펌핑되는 정도에 따라 유압으로 작용하여 참조번호 27과 28로 지칭되는 로드(또는 케이블)를 통해 인젝션펌프(29: 연료 공급장치)를 작동한다.Therefore, the solenoid valve 21 is operated, and thus the oil pumped from the auxiliary pump 11 passes through the solenoid valve 21 through the hydraulic lake 16 and then is supplied to the hydraulic cylinder 24. In accordance with the degree of pumping in the auxiliary pump 11, the hydraulic pump operates the injection pump 29 (fuel supply device) through a rod (or cable) referred to by reference numerals 27 and 28.
반면에 상기 메인펌프(12)의 압력이 상기 인디게이터(15)에 입력된 압력보다 낮아지면 유압실린더(24)의 작동 역순에 의해 제자리로 돌아옴으로써 엔진 출력이 낮아진다.On the other hand, when the pressure of the main pump 12 is lower than the pressure input to the indicator 15, the engine output is lowered by returning to the position by the reverse operation of the hydraulic cylinder 24.
첨부한 도 1에서 미설명 구성인 참조번호 19는 상기 릴레이(17)에서 상기 솔레노이드밸브(21)측에 제공하는 작동 조절용 전원의 전달 경로를 폐쇄하거나 연결하여 자동모드 혹은 수동모드를 선택하기 위한 스위치이다.In FIG. 1, reference numeral 19, which is not described, refers to a switch for closing or connecting a transmission path of an operation control power provided from the relay 17 to the solenoid valve 21. to be.
이상의 설명에서 본 발명은 특정의 실시 예와 관련하여 도시 및 설명하였지만, 특허청구범위에 의해 나타난 발명의 사상 및 영역으로부터 벗어나지 않는 한도 내에서 다양한 개조 및 변화가 가능하다는 것을 당 업계에서 통상의 지식을 가진 자라면 누구나 쉽게 알 수 있을 것이다.While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

Claims (3)

  1. 엔진의 연료 분사량을 조절하는 ECU와, 유압기기의 연료 공급을 위한 인젝션펌프의 작동을 위한 유압실린더와, 상기 유압실린더에 공급되어진 유체(기름)의 배출경로상에 구비되어 유압실린더내의 유압을 조정하는 스로틀밸브와, 상기 스로틀밸브의 유체 배출경로상에 구비되어 있으며 해당 회수유로를 차단 또는 개방하는 릴리프밸브와, 상기 유압실린더로 일정압력의 유체를 공급하기 위한 유압펌프, 및 상기 유압펌프에서 유압실린더측으로 공급하는 유체의 전달 경로 상에 위치하며 유체 공급 유로를 차단 또는 개방하는 솔레노이드밸브를 구비하는 산업용 유압기기에 있어서:ECU for controlling fuel injection amount of engine, hydraulic cylinder for operation of injection pump for fuel supply of hydraulic equipment, and discharge path of fluid (oil) supplied to the hydraulic cylinder to adjust oil pressure in the hydraulic cylinder A throttle valve, a relief valve provided on the fluid discharge path of the throttle valve and blocking or opening the recovery flow path, a hydraulic pump for supplying a constant pressure fluid to the hydraulic cylinder, and a hydraulic pressure in the hydraulic pump. In an industrial hydraulic device having a solenoid valve positioned on a delivery path of a fluid to be supplied to a cylinder, the solenoid valve for blocking or opening a fluid supply flow path:
    상기 유압펌프는 메인펌프와 보조펌프로 구성하며, 보조펌프가 상기 솔레노이드밸브를 통해 유압실린더측에 일정 압력의 유체를 공급하도록 하되;The hydraulic pump is composed of a main pump and an auxiliary pump, the auxiliary pump to supply a fluid of a constant pressure to the hydraulic cylinder side through the solenoid valve;
    입력되는 전압의 상태에 따라 상기 솔레노이드밸브의 개방정도를 조절하는 릴레이와;A relay for adjusting an opening degree of the solenoid valve according to a state of an input voltage;
    상기 메인펌프의 동작에 따른 압력의 변화와 크기를 감지하는 압력센서와;A pressure sensor for detecting a change and a magnitude of pressure according to the operation of the main pump;
    상기 압력센서의 감지신호를 입력받아 감지신호의 크기에 따라 선형적으로 산업용 유압기기의 내부 배터리에서 공급되는 전원을 상기 릴레이 측에 공급하는 인디게이터를 포함하는 것을 특징으로 하는 산업용 유압기기의 연료 절감 장치.Receiving the detection signal of the pressure sensor input fuel saving device of the industrial hydraulic equipment, characterized in that it comprises an indicator for linearly supplying the power supplied from the internal battery of the industrial hydraulic equipment to the relay side according to the magnitude of the detection signal .
  2. 제 1항에 있어서,The method of claim 1,
    상기 릴레이에서 솔레노이드 밸브측에 제공하는 작동 조절 전원의 전달경로를 폐쇄하거나 연결하여 자동모드 혹은 수동모드를 선택하기 위한 스위치를 더 포함하는 것을 특징으로 하는 산업용 유압기기의 연료 절감 장치.And a switch configured to close or connect the transmission path of the operation control power provided to the solenoid valve side in the relay to select an automatic mode or a manual mode.
  3. 제 1항에 있어서,The method of claim 1,
    상기 릴레이의 동작 상태 즉, 압력센서에서 감지되는 메인펌프의 동작에 따른 압력의 변화와 크기에 선형적으로 비례하여 상기 메인펌프의 압력이 고압일 경우와 저압일 경우에 따라 엔진을 제어하는 ECU측에 다이얼 방식으로 설정된 가변저항을 값을 제공하여 엔진 RPM을 조정할 수 있도록 하기 위한 두 개 이상의 가변저항이 상기 릴레이에 연결되는 것을 특징으로 하는 산업용 유압기기의 연료 절감 장치.ECU side which controls the engine according to the case of high pressure and low pressure of the main pump in proportion to the operation state of the relay, that is, linearly proportional to the change and magnitude of the pressure according to the operation of the main pump detected by the pressure sensor The fuel saving device of the industrial hydraulic equipment, characterized in that two or more variable resistors are connected to the relay to provide a value for the variable resistor set in the dialing manner to adjust the engine RPM.
PCT/KR2009/002859 2008-05-31 2009-05-29 Fuel-saving apparatus for industrial hydraulic machine WO2009145582A2 (en)

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KR2020080007160U KR20080001986U (en) 2008-05-31 2008-05-31 Excavafor a fuel economizer
KR20-2008-0007160 2008-05-31
KR10-2008-0074359 2008-07-30
KR1020080074359A KR20090124885A (en) 2008-05-31 2008-07-30 Oil-pressure control circuit of excavator

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CN102852185A (en) * 2012-08-31 2013-01-02 徐州徐工挖掘机械有限公司 Hydraulic excavator capable of adjusting composite movement compatibility

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