WO2013078915A1 - Système de mise en correspondance de puissance de moteur de commande électronique et pompe hydraulique à capacité variable, et procédé s'y rapportant - Google Patents

Système de mise en correspondance de puissance de moteur de commande électronique et pompe hydraulique à capacité variable, et procédé s'y rapportant Download PDF

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Publication number
WO2013078915A1
WO2013078915A1 PCT/CN2012/082349 CN2012082349W WO2013078915A1 WO 2013078915 A1 WO2013078915 A1 WO 2013078915A1 CN 2012082349 W CN2012082349 W CN 2012082349W WO 2013078915 A1 WO2013078915 A1 WO 2013078915A1
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WO
WIPO (PCT)
Prior art keywords
controller
hydraulic pump
engine
electronically controlled
speed
Prior art date
Application number
PCT/CN2012/082349
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English (en)
Chinese (zh)
Inventor
单晓宁
王科
陈志�
Original Assignee
中联重科股份有限公司
湖南中联重科专用车有限责任公司
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Application filed by 中联重科股份有限公司, 湖南中联重科专用车有限责任公司 filed Critical 中联重科股份有限公司
Publication of WO2013078915A1 publication Critical patent/WO2013078915A1/fr

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Classifications

    • 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

Definitions

  • the invention relates to the technical field of engineering machinery, and in particular to a power matching system and method for an electronically controlled engine and a variable hydraulic pump. Background technique
  • the efficiency and fuel economy of hydraulic engineering drives are closely related to the performance of hydraulic pumps and engines.
  • the hydraulic pump In daily engineering operations, on the one hand, the hydraulic pump is required to absorb the maximum torque of the engine to ensure the working capacity and working efficiency of the hydraulic pump; on the other hand, the absorption power of the hydraulic pump is stabilized at the optimal power point of the engine to reduce fuel consumption. .
  • the external characteristic curve of the traditional mechanical engine is completely determined by the governor, and the torque, power and rotational speed of the working point have a direct corresponding relationship in the steady state.
  • the main engine speed is controlled, and the spindle speed is used as a feedback value of the closed loop control to achieve the maximum torque of the conventional mechanical engine for the hydraulic pump.
  • the speed control of the electronically controlled engine is relatively flexible, and the engine controller is connected with various sensors.
  • the sensor receives the signal that the abnormal speed is abnormal, the engine controller passes the fuel intake amount.
  • the speed is automatically adjusted to achieve a constant speed.
  • the electronically controlled engine loses speed, it is completely controlled by its engine controller to control the amount of fuel, which leads to high energy consumption.
  • the engine controller is used to adjust the speed of the electronically controlled engine, in the case where the absorption power of some hydraulic pumps suddenly increases, the adjustment is not timely, and the absorbed power of the variable hydraulic pump is not the optimal power of the electronically controlled engine. The situation at the point occurred. Summary of the invention
  • the invention provides a power matching system and method for an electronically controlled engine and a variable hydraulic pump.
  • the system reduces the rotational speed of the electronically controlled engine by reducing the load of the electronically controlled engine, and reduces the speed of the electronically controlled engine by the engine controller.
  • the fuel consumption also stabilizes the variable hydraulic pump at the optimal power point of the electronically controlled engine.
  • the power matching system of the electronically controlled engine and the variable hydraulic pump provided by the embodiment of the invention includes: an electronically controlled engine, an engine controller, a total controller, a proportional solenoid valve for controlling the displacement of the hydraulic pump of the variable, and a variable hydraulic pressure Pump, where
  • An electronically controlled engine connected to a variable hydraulic pump through a coupling for driving a variable hydraulic pump; an engine controller for measuring the actual rotational speed of the electronically controlled engine;
  • the controller is connected to the engine controller for comparing the actual speed and the obtained target speed, if the actual speed is less than the target speed, and the difference between the target speed and the actual speed is greater than a set a threshold value, according to the magnitude of the difference, outputting a correspondingly adjusted trimming current to the proportional solenoid valve;
  • a proportional solenoid valve for adjusting the valve to reach a corresponding opening according to the received calibration current; adjusting the opening of the valve according to the received trimming current; the variable hydraulic pump for electricity
  • the engine is operated under the power of the engine; during operation, the valve is discharged through the proportional solenoid valve.
  • the total controller is further configured to: when the difference between the target rotational speed and the actual rotational speed is not greater than a set threshold, the trimming current is approached to 0 by an initial value according to a set slope Output to a proportional solenoid valve;
  • the proportional solenoid valve is further configured to adjust the valve to gradually return to the opening degree before receiving the trimming current when the received trimming current approaches the initial value to 0 according to a set slope.
  • the overall controller is configured to obtain a target rotational speed according to performance data of the variable hydraulic pump and performance data of the electronically controlled engine.
  • the electronically controlled engine controller is connected to the overall controller via a CAN (Controller Area Network).
  • the master controller is a PID (proportional-integral-derivative) controller.
  • Embodiments of the present invention also provide a power matching method for an electronically controlled engine and a variable hydraulic pump, including:
  • the engine controller measures an actual speed of the electronically controlled engine, and the electronically controlled engine is used to drive the variable hydraulic pump to operate;
  • the total controller compares the actual rotational speed with the obtained target rotational speed, and if the actual rotational speed is less than the target rotational speed, and the difference between the target rotational speed and the actual rotational speed is greater than a set threshold, The magnitude of the difference, the proportional solenoid valve outputs a correspondingly adjusted trimming current; the proportional solenoid valve adjusts its own valve to the corresponding opening according to the received calibration current; when the proportional solenoid receives the trimming current, according to the fine adjustment The size of the current is increased by the opening of the valve.
  • the valve is a drain valve of the variable hydraulic pump during operation.
  • the method further includes:
  • the total controller outputs the trimming current to the proportional solenoid valve according to a set slope from an initial value to 0;
  • the regulating valve gradually returns to the opening degree before receiving the trimming current.
  • the target rotational speed is obtained based on performance data of the variable hydraulic pump and performance data of the electronically controlled engine.
  • the electronically controlled engine controller is coupled to the overall controller via CAN.
  • the overall controller is a PID controller.
  • the power matching system and the corresponding method of the electronically controlled engine and the variable hydraulic pump provided by the invention pass the actual speed of the electronically controlled engine as a feedback signal, and the output is finely adjusted when the difference between the target speed and the actual speed is greater than the set threshold.
  • the valve of the current regulating proportional solenoid valve achieves the effect of reducing the absorbed power of the variable hydraulic pump and reducing the load of the electronically controlled engine by controlling the discharge amount of the variable hydraulic pump, and the rotational speed of the electronically controlled engine is improved due to the load reduction.
  • the solution of the invention reaches By reducing the absorbed power of the variable hydraulic pump and increasing the speed of the electronically controlled engine, the energy consumed by the engine controller to adjust the rotational speed is reduced; and the variable hydraulic pump is stabilized at the optimal power point of the electronically controlled engine.
  • FIG. 1 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method according to an embodiment of the present invention. detailed description
  • the present invention provides An embodiment of a power matching system for an electronically controlled engine and a variable hydraulic pump.
  • the power matching system of the electronically controlled engine and the variable hydraulic pump includes: an electronically controlled engine 11, an engine controller 12, a total controller 13, a proportional solenoid valve 14 for controlling the displacement of the variable hydraulic pump, and a variable Hydraulic pump 15.
  • the electronically controlled engine 11 is connected to the variable hydraulic pump 15 via a coupling for driving the variable hydraulic pump. In normal operation, the electronically controlled engine 11 rotates through the coupling to drive the variable hydraulic pump 15 to operate.
  • the engine controller 12 is used to measure the actual speed of the electronically controlled engine.
  • the engine controller 12 measures the actual rotational speed of the electronically controlled engine through the sensor and sends it to the overall controller 13.
  • the controller 13 is connected to the engine controller 12 for comparing the actual speed and the obtained target speed. If the actual speed is less than the target speed, and the difference between the target speed and the actual speed is greater than The predetermined threshold value is used to output a correspondingly adjusted trimming current to the proportional solenoid valve according to the magnitude of the difference.
  • the overall controller 13 receives the measurement by the engine controller 12
  • the actual speed of the electronically controlled engine compares the actual speed with the target speed. If the result of the comparison is that the actual speed is less than the target speed, that is, the engine speed, the total controller 13 calculates the difference between the target speed and the actual speed, and makes the difference again with a set threshold.
  • the output size is correspondingly adjusted according to the difference between the target speed and the actual speed, that is, the larger the difference, the larger the trimming current of the output.
  • the output trimming current is used to supply a proportional solenoid valve.
  • the overall controller 13 is further adapted to obtain the target rotational speed based on the performance data of the variable hydraulic pump 15 and the performance data of the electronically controlled engine 11.
  • the target speed is based on various performance data of the variable hydraulic pump and various performance data of the electronically controlled engine, combined with the working environment of the variable hydraulic pump, etc., and comprehensively considers the optimal rotational speed of the electronically controlled engine.
  • This optimum speed is also set to the engine controller to control the electronically controlled engine to reach the set speed.
  • the electronically controlled engine 11 drives the variable hydraulic pump 15 to operate at the optimum speed.
  • the engine controller 12 is coupled to the overall controller 13 via a controller area network.
  • the controller area network is used for data transfer between the engine controller 12 and the overall controller 13.
  • the overall controller is a PID controller.
  • the PID controller is often used to compare the collected data with a reference value and use the difference as a new input value so that the system data reaches or remains at the reference value.
  • the PID controller is used as a total controller to output a size-dependent trimming current according to the difference between the target speed and the actual speed.
  • the proportional solenoid valve 14 adjusts the valve to the corresponding opening according to the received calibration current; when the proportional solenoid receives the trimming current, adjusts the opening of the valve according to the magnitude of the trimming current,
  • the valve is a drain valve for the variable hydraulic pump during operation.
  • the proportional solenoid valve 14 controls the discharge amount of the variable hydraulic pump 15 by controlling the opening degree of the valve.
  • the proportional solenoid valve 14 has a constant current supply, so that the opening degree of the valve remains unchanged, and the discharge amount of the control variable hydraulic pump does not change, so that the absorbed power of the variable hydraulic pump does not change.
  • the valve When the proportional solenoid valve 13 receives the trimming current, the valve is controlled to increase the opening according to the magnitude of the trimming current, and the displacement of the variable hydraulic pump 15 is expanded.
  • the variable hydraulic pump 15 When the variable hydraulic pump 15 is drained When the amount is increased, the starting force of the variable hydraulic pump 15 is reduced, and the absorbed power is lowered.
  • the absorption power of the variable hydraulic pump is reduced, the load of the electronically controlled engine is reduced, and the rotational speed of the electronically controlled engine is increased.
  • the overall controller 13 is further configured to: when the difference between the target rotational speed and the actual rotational speed is not greater than a set threshold, the trimming current is approached to 0 by an initial value according to a set slope.
  • the output to the proportional solenoid valve; the proportional solenoid valve 14 is further used to adjust the valve to gradually return to the opening degree before receiving the trimming current when the received trimming current approaches the initial value to 0 according to a set slope.
  • the engine controller 12 sends its actual rotational speed to the overall controller 13, and the overall controller 13 determines that the difference between the target rotational speed and the actual rotational speed is less than the set threshold value,
  • the trimming current is output to the proportional solenoid valve 13 according to the set slope, and the valve of the proportional solenoid valve 13 gradually decreases the opening degree as the trimming current approaches the set slope according to the set slope, and the displacement of the variable hydraulic pump is gradually increased. Revert to the amount of liquid that is calibrated when the current control proportional solenoid valve is calibrated.
  • the absorbed power of the variable hydraulic pump is restored, which is comparable to the optimal power point of the electronically controlled engine.
  • the detected electronically controlled engine speed is fed back to the overall controller by the engine controller, and the total controller compares the actual speed and the obtained target speed, when the actual speed is less than the target speed, and When the difference between the target rotational speed and the actual rotational speed is greater than the set threshold value, the total controller outputs a valve for increasing the opening degree of the trimming current control proportional solenoid valve 13 corresponding to the magnitude of the difference.
  • the valve opening is increased, the displacement of the variable hydraulic pump is increased, the starting force is reduced, and the absorbed power of the variable hydraulic pump is reduced.
  • the reduced absorption power of the variable hydraulic pump reduces the load on the electronically controlled engine, and the rotational speed of the electronically controlled engine begins to rise. With this method, the energy consumption when adjusting solely by the electronically controlled engine controller can be reduced.
  • the present invention also provides a power matching method for a corresponding variable hydraulic pump and an electronically controlled engine, and a method embodiment will be described below with reference to the accompanying drawings.
  • the method includes:
  • Step S201 the engine controller measures the actual speed of the electronically controlled engine.
  • the electronically controlled engine is used to drive variable hydraulic pump operation.
  • Step S202 the controller compares the actual speed and the obtained target speed. If the actual speed is less than the target speed, and the difference between the target speed and the actual speed is greater than a set threshold, then According to the magnitude of the difference, a proportionally-sized trimming current is output to the proportional solenoid valve.
  • Step S203 When the proportional solenoid valve receives the trimming current, adjust the opening degree of the valve according to the magnitude of the trimming current.
  • the valve is a drain valve of the variable hydraulic pump during operation.
  • a constant calibration current is supplied to the proportional solenoid valve before the proportional solenoid valve receives the trimming current.
  • the proportional solenoid valve adjusts its own valve to the corresponding opening according to the received calibration current, so that the displacement of the variable hydraulic pump is constant, and the absorbed power is constant.
  • the valve of the proportional solenoid valve increases.
  • the method further includes: if the difference between the comparison target rotational speed and the actual rotational speed is not greater than the set threshold, The total controller outputs the trimming current to the proportional solenoid valve according to a set slope from an initial value to 0; when the trimming current received by the proportional solenoid valve approaches the initial value to 0 according to a set slope, the adjustment The valve gradually returns to the opening before receiving the trimming current. This step is used to restore the absorbed power of the variable hydraulic pump to the optimal power of the electronically controlled engine after the speed of the electronically controlled engine is increased.
  • the method for obtaining the target rotational speed in the embodiment is as follows:
  • the total controller obtains the target rotational speed based on the performance data of the variable hydraulic pump and the performance data of the electronically controlled engine.
  • the engine controller and the overall controller are connected via a controller area network.
  • the overall controller is a PID controller.
  • the detected electronic control engine speed is fed back to the overall controller by the engine controller, and the total controller compares the actual speed and the obtained target speed, when the actual speed is less than the target speed, and When the difference between the target rotational speed and the actual rotational speed is greater than the set threshold value, the total controller outputs a valve for increasing the opening degree of the trimming current control proportional solenoid valve 13 corresponding to the magnitude of the difference.
  • the valve opening is increased, the displacement of the variable hydraulic pump is increased, the starting force is reduced, and the absorbed power of the variable hydraulic pump is reduced.
  • the reduced absorption power of the variable hydraulic pump reduces the load on the electronically controlled engine, and the rotational speed of the electronically controlled engine begins to rise.
  • the present embodiment also provides a solution for adjusting the absorbed power of the variable displacement hydraulic pump to the optimal power matching state with the electronically controlled engine when the electronically controlled engine is raised to the target rotational speed.

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

Abstract

L'invention concerne un système de mise en correspondance de puissance pour un moteur de commande électronique et une pompe hydraulique à capacité variable. Le système comprend un moteur de commande électronique (11), une unité de commande de moteur (12) pour mesurer la vitesse de rotation réelle du moteur de commande électronique, une unité de commande maître (13) pour comparer la vitesse de rotation réelle à une vitesse de rotation cible acquise. Si la vitesse de rotation réelle est inférieure à la vitesse de rotation cible et si la différence entre la vitesse de rotation cible et la vitesse de rotation réelle est supérieure à une valeur seuil prédéfinie, un courant d'ajustement fin approprié est envoyé vers un solénoïde proportionnel (14) en fonction de la différence. Le solénoïde proportionnel (14) voit son ouverture augmenter en fonction du courant d'ajustement fin reçu. Le système comprend également une pompe hydraulique à capacité variable (15) qui fonctionne sous l'effet de l'action du moteur de commande électronique. Le système augmente la vitesse de rotation du moteur de commande électronique en réduisant la charge du moteur de commande électronique, réduit la consommation d'huile pour ajuster la vitesse de rotation du moteur de commande électronique via l'unité de commande du moteur (12), et assure simultanément un fonctionnement stable de la pompe hydraulique à capacité variable (15) à un point de puissance optimal du moteur de commande électronique. L'invention concerne également un procédé correspondant pour ce système.
PCT/CN2012/082349 2011-11-28 2012-09-28 Système de mise en correspondance de puissance de moteur de commande électronique et pompe hydraulique à capacité variable, et procédé s'y rapportant WO2013078915A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110386398.3 2011-11-28
CN201110386398.3A CN102505996B (zh) 2011-11-28 2011-11-28 一种电控发动机和变量液压泵的功率匹配系统及方法

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US9759147B2 (en) 2014-08-29 2017-09-12 Cnh Industrial America Llc Idle return system and method for an off highway vehicle
CN111501869A (zh) * 2020-05-20 2020-08-07 三一重机有限公司 电控液压伺服控制系统、方法和电动挖掘机

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CN102776913A (zh) * 2012-07-31 2012-11-14 龙工（上海）挖掘机制造有限公司 一种液压挖掘机功率匹配方法
CN102996265B (zh) * 2012-11-27 2016-02-03 中联重科股份有限公司渭南分公司 工程机械设备及其发动机转速控制方法、装置和系统
CN103397678B (zh) * 2013-08-13 2015-07-01 南京工业大学 一种发动机和液压泵的功率匹配节能系统及方法
CN103711598B (zh) * 2013-12-03 2016-02-10 中联重科股份有限公司 液压系统调节设备、方法、功率匹配控制系统和工程机械
CN103899291B (zh) * 2014-04-24 2016-08-03 徐工集团工程机械股份有限公司 旋挖钻机节能控制方法、装置和系统
CN105525905B (zh) * 2014-09-28 2019-02-26 徐工集团工程机械股份有限公司 一种旋挖钻机功率自适应控制系统及其方法
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CN111271176A (zh) * 2020-01-16 2020-06-12 天津捷强动力装备股份有限公司 一种发电性能指标稳定的液压发电控制方法
CN112412648B (zh) * 2020-11-17 2022-07-05 上海华兴数字科技有限公司 一种功率匹配自适应控制方法、装置、设备及存储介质
CN115478581B (zh) * 2022-10-27 2024-04-16 潍柴动力股份有限公司 一种液压系统的控制方法、控制装置和工程车辆

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CN103670750A (zh) * 2013-12-12 2014-03-26 中联重科股份有限公司 极限功率匹配控制系统、方法、装置及工程机械
CN103670750B (zh) * 2013-12-12 2016-04-06 中联重科股份有限公司 极限功率匹配控制系统、方法、装置及工程机械
US9759147B2 (en) 2014-08-29 2017-09-12 Cnh Industrial America Llc Idle return system and method for an off highway vehicle
CN111501869A (zh) * 2020-05-20 2020-08-07 三一重机有限公司 电控液压伺服控制系统、方法和电动挖掘机

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