WO2013007120A1 - 一种工程机械极限负载控制方法和装置 - Google Patents

一种工程机械极限负载控制方法和装置 Download PDF

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Publication number
WO2013007120A1
WO2013007120A1 PCT/CN2012/074214 CN2012074214W WO2013007120A1 WO 2013007120 A1 WO2013007120 A1 WO 2013007120A1 CN 2012074214 W CN2012074214 W CN 2012074214W WO 2013007120 A1 WO2013007120 A1 WO 2013007120A1
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Prior art keywords
displacement
rated power
engine
upper limit
threshold
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PCT/CN2012/074214
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English (en)
French (fr)
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颜理
罗军
郭亿
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湖南三一智能控制设备有限公司
三一汽车起重机械有限公司
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Publication of WO2013007120A1 publication Critical patent/WO2013007120A1/zh

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2221Control of flow rate; Load sensing arrangements
    • E02F9/2232Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00Other constructional features or details
    • B66C13/18Control systems or devices
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2246Control of prime movers, e.g. depending on the hydraulic load of work tools

Definitions

  • the invention relates to a Chinese patent application for a construction machinery limit load control method and device.
  • the application is filed on July 14, 2011 by the Chinese Patent Office, the application number is 201110197125.4, and the invention name is "an engineering machinery limit load control method and device" Priority is hereby incorporated by reference in its entirety.
  • the present invention relates to the field of construction machinery, and more particularly to a mobile weight mechanism for a crane.
  • the invention also relates to a crane having the above-described mobile weight mechanism.
  • the hydraulic system uses an oil pump as the power unit, and the oil pump is generally driven by a diesel engine.
  • the operator can control the engine speed through a manual throttle.
  • the engine pushes the oil through the oil pump outlet into the actuator unit (such as a hydraulic cylinder) during the rotation to push the mechanical components.
  • the operator can also control the displacement of the oil pump through the action handle to control the speed of movement of the mechanical components.
  • the engine corresponds to each rated speed corresponding to each rated speed, and the rated power is the ultimate load power of the engine at the rotating speed, which is operated by the operator.
  • the output power generated by the movement of the mechanical parts controlled by the action handle is higher than the rated power at the current engine speed, the engine will suddenly turn off and may cause a more serious danger.
  • An engineering machinery limit load control method applied to a construction machine equipped with a hydraulic system comprising:
  • An engineering machinery limit load control device is applied to a construction machine equipped with a hydraulic system, including:
  • An acquisition unit configured to obtain a rated power at a current engine speed
  • a determining unit configured to determine a displacement threshold of the oil pump according to the rated power
  • a setting unit configured to set an upper limit of the displacement that can be controlled by the action handle according to the displacement threshold, wherein the upper limit of the displacement is not greater than the displacement threshold.
  • the embodiment of the present application has the following advantages: determining the displacement threshold of the oil pump according to the rated power at the current engine speed, and then setting the upper limit of the displacement that can be controlled by the action handle according to the displacement threshold, so that the upper limit of the displacement that can be controlled by the action handle is not greater than
  • the displacement threshold is such that the output power of the hydraulic system can only reach the rated power at the current speed of the transmitter, which can prevent the engine from being extinguished due to the output power being greater than the rated power.
  • any of the products of the embodiments of the present application does not necessarily require all of the advantages described above to be achieved at the same time.
  • FIG. 1 is a schematic flow chart of a method for preventing a flameout of a construction machine according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a crane for a vehicle according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a construction machinery anti-extinguishing device according to an embodiment of the present application.
  • the core idea of the invention is: determining the displacement threshold of the oil pump according to the rated power at the current engine speed, and then setting the upper limit of the displacement that can be controlled by the action handle according to the displacement threshold, so that the upper limit of the displacement that can be controlled by the action handle is not greater than the row
  • the threshold value so that the output power of the hydraulic system can only reach the rated power at the current speed of the transmitter, which can effectively prevent the engine from being extinguished due to the output power being greater than the rated power.
  • the process of the engineering machinery limit load control method provided by the embodiment of the present application is applied to a construction machine equipped with a hydraulic system, and specifically includes the following steps:
  • Step 101 Obtain the rated power at the current engine speed.
  • the process of obtaining the rated power at the current engine speed can be as follows: First, get the current speed of the engine.
  • the operator sends a control signal to the controller through the manual throttle.
  • the controller can determine the corresponding engine speed according to the throttle opening information carried in the control signal, and output the corresponding speed information to the engine. Therefore, the current speed information of the engine can be obtained from the controller or the engine.
  • the rated power at the current engine speed is determined.
  • the engine has different rated powers at different speeds.
  • the manufacturer of the engine will provide a corresponding relationship between the speed and the rated power.
  • the corresponding relationship can be a comparison table of the speed and the rated power, or a formula for calculating the rated power from the rotational speed and a correlation coefficient.
  • Step 102 Determine a displacement threshold of the oil pump according to the rated power.
  • the rated power may be used as a threshold of the output power, and the output power may not exceed the threshold, and the displacement threshold may be calculated according to the threshold of the output power.
  • a pressure sensor can be provided at the outlet of the oil pump to obtain the pressure of the oil at the outlet of the oil pump, and the pressure sensor can send the detected pressure signal to the controller.
  • the displacement of the oil pump when the output power of the hydraulic system is the rated power is calculated as the displacement threshold of the oil pump.
  • the displacement of the oil pump is the volume of oil discharged from the outlet of the oil pump every time the engine rotates.
  • the size of the displacement is determined by the size of the opening of the solenoid valve at the outlet of the pump.
  • the operator can operate the action handle to send a control signal to the controller.
  • the controller determines the opening size of the solenoid valve based on the control signal and controls the electronic valve.
  • the relationship between displacement and output power can be expressed by the following formula:
  • Step 103 Set an upper limit of the displacement that can be controlled by the action handle according to the displacement threshold, where the upper limit of the displacement is not greater than the displacement threshold.
  • the threshold value can be used to control the output power not greater than the threshold of the output power (ie, the rated power at the current speed described above).
  • the method for setting the upper limit of the displacement may be: setting the displacement threshold to the upper limit of the displacement that can be controlled by the action handle. It is also possible to set any value less than the displacement threshold to the upper displacement limit that can be controlled by the action handle.
  • the method for setting the upper limit of the displacement may also be: setting a plurality of operating gear positions, and setting a displacement percentage corresponding to each operating gear position; setting an upper limit of the displacement controllable by the handle corresponding to each operating gear position as a displacement threshold value
  • the product of the percentage of displacement corresponding to the operating gear For example, if you set 4 operating gears, the corresponding displacement percentages are 25%, 50%, 75%, 100%, and the ⁇ displacement threshold is 100 ml, then the lower limit of the lowest gear (25%) is 25 ml, the highest level (100%) has a maximum displacement of 100 ml.
  • the gear switch can be set on the construction machine and connected to the controller for switching the gear position.
  • the embodiment of the invention may further comprise the step of setting a correspondence between the opening degree of the action handle and the real-time displacement.
  • the action handle controls the opening and closing of the electronic valve through the controller to control the size of the real-time displacement.
  • the correspondence between the opening of the action handle and the real-time displacement can be set as follows:
  • the opening degree of the action handle is proportional to the real-time displacement, so that the maximum opening degree of the action handle (such as 60 degrees) corresponds to the maximum real-time.
  • Displacement ie, the upper limit of the displacement that can be controlled by the action handle
  • the minimum opening of the action handle (0 degree) corresponds to the real-time displacement of 0
  • the opening of the action handle is linearly related to the real-time displacement.
  • the opening of the action handle and the real-time displacement may also be other corresponding relationships, such as a non-linear correspondence.
  • the positions of the manual throttle, the gear switch, the action handle, the controller and the pressure sensor can be as shown in Fig. 2, wherein 1 is a manual throttle, 2 is a gear switch, and 3 is a motion handle. 4 is the controller and 5 is the pressure sensor.
  • the signal of the pressure sensor can be input to the controller through AI (Analog Input) to monitor the pressure of the pump outlet in real time.
  • the gear position signal of the gear switch can be DI (Digital Input). Pin) input controller;
  • the control signal of the manual throttle can be input to the controller through the AI;
  • the operation signal of the action handle can be input to the controller through the CAN2.0 digital signal bus.
  • the displacement threshold of the oil pump is determined according to the rated power at the current engine speed, and then the upper limit of the displacement that can be controlled by the action handle is set according to the displacement threshold, so that the upper limit of the displacement that can be controlled by the action handle is not greater than the displacement threshold. Therefore, the output power of the hydraulic system can only reach the rated power at the current speed of the transmitter, which can prevent the engine from being extinguished due to the output power being greater than the rated power, and can also improve the precision of the operation of the engineering machine.
  • the embodiment of the present application further provides an engineering machinery limit load control device, which is applied to a construction machine equipped with a hydraulic system.
  • the device may include:
  • the acquiring unit 310 is configured to obtain a rated power at a current engine speed
  • a determining unit 320 configured to determine a displacement threshold of the oil pump according to the rated power
  • a setting unit 330 configured to set an upper limit of the displacement that can be controlled by the action handle according to the displacement threshold, wherein the upper limit of the displacement is not greater than The displacement threshold is described.
  • the acquiring unit 310 is specifically configured to:
  • the rated power at the current rotational speed of the engine is determined according to the correspondence between the rotational speed of the engine and the rated power.
  • the determining unit 320 is specifically configured to:
  • the displacement of the oil pump when the value of the output power of the hydraulic system is the rated power is calculated as the displacement threshold of the oil pump.
  • the setting unit 330 is specifically configured to:
  • the displacement threshold is set to a corresponding displacement upper limit when the maximum opening of the action handle is reached.
  • the setting unit 330 is specifically configured to:
  • the upper limit of the displacement controllable by the handle corresponding to each operating gear position is set as the product of the displacement threshold value and the displacement percentage corresponding to the operating gear position.
  • the setting unit 330 is further configured to:
  • the setting unit 330 is specifically configured to:
  • the opening degree of the action handle is set to be proportional to the real-time displacement.
  • the displacement threshold of the oil pump is determined according to the rated power at the current engine speed, and then the upper limit of the displacement that can be controlled by the action handle is set according to the displacement threshold, so that the upper limit of the displacement that can be controlled by the action handle is not greater than the displacement threshold. Therefore, the output power of the hydraulic system can only reach the rated power at the current speed of the transmitter, which can prevent the engine from being extinguished due to the output power being greater than the rated power, and can also improve the precision of the operation of the engineering machine.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a
  • the terminal device (which may be a cell phone, a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.

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Abstract

一种工程机械极限负载控制方法,应用于配有液压系统的工程机械中,该方法包括:获取发动机当前转速下的额定功率;根据额定功率确定油泵的排量阈值;根据排量阈值设置动作手柄(3)可控制的排量上限,排量上限不大于排量阈值。还公开了一种工程机械极限负载控制装置,其包括获取单元,确定单元,设置单元。从而防止因输出功率大于额定功率所导致的发动机熄火现象。

Description

一种工程机械极限负载控制方法和装置 本申请要求于 2011 年 07 月 14 日提交中国专利局、 申请号为 201110197125.4、 发明名称为"一种工程机械极限负载控制方法和装置"的 中国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及工程机械技术领域, 特别是涉及一种用于起重机的移动式 配重机构。 本发明还涉及一种具有上述移动式配重机构的起重机。
背景技术
在工程机械领域, 液压系统以其体积小、 重量轻、 运动惯量小、 运动 平稳、使用寿命长、 可以大范围无级调速等优势, 正在越来越多的被应用。 液压系统采用油泵作为动力单元, 油泵一般由柴油发动机驱动。
在操作配有液压系统的工程机械时, 操作者可以通过手动油门控制发 动机的转速, 发动机在旋转的过程中将油液通过油泵出口推入到执行单元 (如液压缸) 中, 以推动机械部件运动, 另外, 操作者还可以通过动作手 柄控制油泵的排量, 以控制机械部件的运动速度。
在实现本发明的过程中, 发明人发现现有技术至少存在如下问题: 发 动机对应每个转速都对应有一个额定功率, 额定功率即为该发动机在该转 速下的极限负载功率, 在操作者操作工程机械的过程中, 如果通过动作手 柄控制机械部件运动所产生的输出功率高于当时发动机转速下的额定功 率, 则会使发动机突然熄火, 并可能导致更严重的危险发生。
发明内容
本发明的目的在于提供一种工程机械极限负载控制方法和装置, 以防 止因液压系统输出功率高于发动机额定功率而 ^ I起的发动机熄火, 为此, 本发明实施例采用如下技术方案:
一种工程机械极限负载控制方法,应用于配有液压系统的工程机械中, 包括:
获取发动机当前转速下的额定功率;
根据所述额定功率确定油泵的排量阈值;
根据所述排量阈值设置动作手柄可控制的排量上限, 其中, 所述排量 上限不大于所述排量阈值。 一种工程机械极限负载控制装置,应用于配有液压系统的工程机械中, 包括:
获取单元, 用于获取发动机当前转速下的额定功率;
确定单元, 用于根据所述额定功率确定油泵的排量阈值;
设置单元, 用于根据所述排量阈值设置动作手柄可控制的排量上限, 其中, 所述排量上限不大于所述排量阈值。
本申请的实施例具有以下优点, 根据发动机当前转速下的额定功率确 定油泵的排量阈值, 然后根据排量阈值设置动作手柄可控制的排量上限, 使动作手柄可控制的排量上限不大于该排量阈值, 从而使液压系统的输出 功率最高只能达到发送机当前转速下的额定功率, 可以防止因输出功率大 于额定功率所导致的发动机熄火现象。 当然, 实施本申请的实施例的任一 产品并不一定需要同时达到以上所述的所有优点。
附图说明
图 1为本申请实施例提供的工程机械防熄火方法的流程示意图; 图 2为本申请实施例提供的汽车起重机的结构示意图;
图 3为本申请实施例提供的工程机械防熄火装置的结构示意图。
具体实施方式
下面将结合本发明中的附图, 对本发明中的技术方案进行清楚、 完整 的描述, 显然, 所描述的实施例是本发明的一部分实施例, 而不是全部的 实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性 劳动的前提下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明的核心思想是: 根据发动机当前转速下的额定功率确定油泵的 排量阈值, 然后根据排量阈值设置动作手柄可控制的排量上限, 使动作手 柄可控制的排量上限不大于该排量阈值, 从而使液压系统的输出功率最高 只能达到发送机当前转速下的额定功率, 可以有效的防止因输出功率大于 额定功率所导致的发动机熄火现象。
如图 1所示, 为本申请实施例提供的工程机械极限负载控制方法的流 程, 应用于配有液压系统的工程机械中, 具体包括以下步骤:
步骤 101 , 获取发动机当前转速下的额定功率。
具体的, 获取发动机当前转速下的额定功率的过程可以如下: 首先, 获取发动机的当前转速。
操作者在操作工程机械的过程中, 通过手动油门发送控制信号到控制 器, 控制器可以根据控制信号中携带的油门开度信息确定对应的发动机转 速, 并将相应的转速信息输出给发动机。 故可以从控制器或发动机获取发 动机当前的转速信息。
然后, 根据所述发动机的转速与额定功率的对应关系, 确定发动机当 前转速下的额定功率。
发动机在不同的转速下, 都对应有不同的额定功率。 一般情况下, 发 动机的制造厂家都会提供其转速与额定功率的对应关系, 该对应关系可以 是转速和额定功率的对照表, 也可以是由转速计算额定功率的公式及相关 系数。
步骤 102, 根据该额定功率确定油泵的排量阈值。
具体的, 为了使液压系统的输出功率不超过该额定功率, 可以将该额 定功率作为输出功率的阈值, 输出功率不能超过该阈值, 进而根据该输出 功率的阈值计算排量阈值。
首先, 获取油液对油泵出口处的压力和发动机的转速。
可以在油泵出口处设置压力传感器,以获取油液对油泵出口处的压力, 压力传感器可以将检测到的压力信号发送给控制器。
发动机转速的获取方法上面已经进行了阐述, 在此不做累述。
然后, 根据所述压力、 所述额定功率和所述发动机的转速, 计算当液 压系统的输出功率的值为所述额定功率时油泵的排量, 作为油泵的排量阈 值。
其中, 油泵的排量为发动机每转动一圏, 油泵出口排出的油液体积。 排量的大小由油泵出口处的电磁阀的开口大小决定。 操作者在操作工程机 械的过程中, 可以操作动作手柄向控制器发送控制信号, 控制器根据控制 信号确定电磁阀的开口大小, 并对电子阀进行控制。 排量与输出功率之间 的关系可以用以下公式表示:
输出功率 =转速 *排量 *压力 I系数
根据上述公式,将输出功率的阈值(即发动机当前转速下的额定功率)、 转速、 压力代入公式中, 得出的排量即为排量阈值。 步骤 103 , 根据所述排量阈值设置动作手柄可控制的排量上限, 其中, 所述排量上限不大于所述排量阈值。 根据上述排量与输出功率的关系式可 知, 越大的排量对应了越大的输出功率, 所以, 控制油泵的排量不大于排 量阈值(即手柄可控制的排量上限不大于排量阈值),便可以控制输出功率 不大于输出功率的阈值(即上述的当前转速下的额定功率)。
具体的, 设置排量上限的方法可以是: 将排量阈值设置为动作手柄可 控制的排量上限。 也可以将小于排量阈值的任何值设置为动作手柄可控制 的排量上限。
另外, 设置排量上限的方法还可以是: 设置多个操作档位, 并设置各 操作档位对应的排量百分比; 将对应各操作档位的手柄可控制的排量上限 设置为排量阈值与操作档位对应的排量百分比的乘积。 例如, 设置 4个操 作档位, 对应的排量百分比分别为 25%、 50%、 75%、 100%, 殳排量阈 值为 100毫升, 那么最低档位(25% )的排量上限则为 25毫升, 最高档位 ( 100% )的排量上限则为 100毫升。 优选的, 可以在工程机械上设置档位 开关, 与控制器相连, 用于进行档位的切换。 采用多操作档位的设置, 一 方面, 在低档位下, 可以提高操作的精度, 另一方面, 在高档位下, 排量 可以较快速的变化, 可以达到控制机械部件运动速度快速变化的效果。
本发明实施例, 还可以包括设置动作手柄的开度与实时排量的对应关 系的步骤。 动作手柄通过控制器控制电子阀的开闭, 以控制实时排量的大 小。 动作手柄的开度与实时排量的对应关系可以设置为: 动作手柄的开度 与实时排量成正比例对应关系, 这样即, 动作手柄的最大开度(如 60度) 对应的是最大的实时排量(即动作手柄可控制的排量上限),动作手柄的最 小开度(0度)对应的实时排量为 0, 且动作手柄的开度与实时排量成线性 对应关系。 当然, 动作手柄的开度与实时排量还可以是其他的对应关系, 如非线性的对应关系。
在汽车起重机的应用场景中, 手动油门、 档位开关、 动作手柄、 控制 器和压力传感器的位置可以如图 2所示, 其中, 1为手动油门, 2为档位开 关, 3为动作手柄, 4为控制器, 5为压力传感器。 压力传感器的信号可以 通过 AI ( Analog Input, 模拟量采样管脚)输入控制器, 以实时监测油泵 出口的压力; 档位开关的档位信号可以通过 DI ( Digital Input, 数字量采样 管脚)输入控制器; 手动油门的控制信号可以通过 AI输入控制器; 动作手 柄的操作信号可以通过 CAN2.0数字信号总线输入控制器。 一般的, 在汽 车起重机中, 设有 3个油泵, 并设有 3个压力传感器分别负责检测各油泵 出口处的压力, 还设有 2个动作手柄分别负责 X轴和 Y轴方向上的运动。
本申请实施例, 根据发动机当前转速下的额定功率确定油泵的排量阈 值, 然后根据排量阈值设置动作手柄可控制的排量上限, 使动作手柄可控 制的排量上限不大于该排量阈值, 从而使液压系统的输出功率最高只能达 到发送机当前转速下的额定功率, 可以防止因输出功率大于额定功率所导 致的发动机熄火现象, 同时也可以提高工程机械操作的精度。
基于相同的技术构思, 本申请实施例还提供了一种工程机械极限负载 控制装置, 应用于配有液压系统的工程机械中, 如图 3所示, 该装置可以 包括:
获取单元 310, 用于获取发动机当前转速下的额定功率;
确定单元 320, 用于根据所述额定功率确定油泵的排量阈值; 设置单元 330, 用于根据所述排量阈值设置动作手柄可控制的排量上 限, 其中, 所述排量上限不大于所述排量阈值。
优选的, 所述获取单元 310, 具体用于:
获取所述发动机的当前转速;
根据所述发动机的转速与额定功率的对应关系, 确定所述发动机当前 转速下的额定功率。
优选的, 所述确定单元 320, 具体用于:
获取油液对油泵出口处的压力和发动机的转速;
根据所述压力、 所述额定功率和所述发动机的转速, 计算当液压系统 的输出功率的值为所述额定功率时油泵的排量, 作为油泵的排量阈值。
优选的, 所述设置单元 330, 具体用于:
将所述排量阈值设置为动作手柄最大开度时对应的排量上限。
优选的, 所述设置单元 330, 具体用于:
设置多个操作档位, 以及各操作档位对应的排量百分比;
将对应各操作档位的手柄可控制的排量上限设置为排量阈值与操作档 位对应的排量百分比的乘积。 优选的, 所述设置单元 330, 还用于:
设置所述动作手柄的开度与实时排量的对应关系。
优选的, 所述设置单元 330, 具体用于:
设置所述动作手柄的开度与所述实时排量成正比例对应关系。
本申请实施例, 根据发动机当前转速下的额定功率确定油泵的排量阈 值, 然后根据排量阈值设置动作手柄可控制的排量上限, 使动作手柄可控 制的排量上限不大于该排量阈值, 从而使液压系统的输出功率最高只能达 到发送机当前转速下的额定功率, 可以防止因输出功率大于额定功率所导 致的发动机熄火现象, 同时也可以提高工程机械操作的精度。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描 述进行分布于实施例的装置中, 也可以进行相应变化位于不同于本实施例 的一个或多个装置中。 上述实施例的模块可以合并为一个模块, 也可以进 一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本 发明可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬 件, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发明的技 术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体 现出来, 该计算机软件产品存储在一个存储介质中, 包括若干指令用以使 得一台终端设备(可以是手机, 个人计算机, 服务器, 或者网络设备等) 执行本发明各个实施例所述的方法。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的 普通技术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干改进 和润饰, 这些改进和润饰也应视本发明的保护范围。

Claims

权 利 要 求
1、一种工程机械极限负载控制方法,应用于配有液压系统的工程机械 中, 其特征在于, 包括:
获取发动机当前转速下的额定功率;
根据所述额定功率确定油泵的排量阈值;
根据所述排量阈值设置动作手柄可控制的排量上限, 其中, 所述排量 上限不大于所述排量阈值。
2、 如权利要求 1所述的方法, 其特征在于, 所述获取发动机当前转速 下的额定功率, 具体为:
获取所述发动机的当前转速;
根据所述发动机的转速与额定功率的对应关系, 确定所述发动机当前 转速下的额定功率。
3、 如权利要求 1所述的方法, 其特征在于, 根据所述额定功率确定油 泵的排量阈值, 具体为:
获取油液对油泵出口处的压力和发动机的转速;
根据所述压力、 所述额定功率和所述发动机的转速, 计算当液压系统 的输出功率的值为所述额定功率时油泵的排量, 作为油泵的排量阈值。
4、 如权利要求 1所述的方法, 其特征在于, 根据所述排量阈值设置动 作手柄可控制的排量上限, 具体为:
将所述排量阈值设置为动作手柄最大开度时对应的排量上限。
5、 如权利要求 1所述的方法, 其特征在于, 根据所述排量阈值设置动 作手柄可控制的排量上限, 具体为:
设置多个操作档位, 以及各操作档位对应的排量百分比;
将对应各操作档位的手柄可控制的排量上限设置为排量阈值与操作档 位对应的排量百分比的乘积。
6、 如权利要求 1所述的方法, 其特征在于, 还包括:
设置所述动作手柄的开度与实时排量的对应关系。
7、 如权利要求 6所述的方法, 其特征在于, 设置所述动作手柄的开度 与实时排量的对应关系, 具体为:
设置所述动作手柄的开度与所述实时排量成正比例对应关系。
8、一种工程机械极限负载控制装置,应用于配有液压系统的工程机械 中, 其特征在于, 包括:
获取单元, 用于获取发动机当前转速下的额定功率;
确定单元, 用于根据所述额定功率确定油泵的排量阈值;
设置单元, 用于根据所述排量阈值设置动作手柄可控制的排量上限, 其中, 所述排量上限不大于所述排量阈值。
9、如权利要求 8所述的方法,其特征在于,所述获取单元,具体用于: 获取所述发动机的当前转速;
根据所述发动机的转速与额定功率的对应关系, 确定所述发动机当前 转速下的额定功率。
10、 如权利要求 8所述的方法, 其特征在于, 所述确定单元, 具体用 于:
获取油液对油泵出口处的压力和发动机的转速;
根据所述压力、 所述额定功率和所述发动机的转速, 计算当液压系统 的输出功率的值为所述额定功率时油泵的排量, 作为油泵的排量阈值。
11、 如权利要求 8所述的方法, 其特征在于, 所述设置单元, 具体用 于:
将所述排量阈值设置为动作手柄最大开度时对应的排量上限。
12、 如权利要求 8所述的方法, 其特征在于, 所述设置单元, 具体用 于:
设置多个操作档位, 以及各操作档位对应的排量百分比;
将对应各操作档位的手柄可控制的排量上限设置为排量阈值与操作档 位对应的排量百分比的乘积。
13、 如权利要求 8所述的方法, 其特征在于, 所述设置单元, 还用于: 设置所述动作手柄的开度与实时排量的对应关系。
14、 如权利要求 13所述的方法, 其特征在于, 所述设置单元, 具体用 于:
设置所述动作手柄的开度与所述实时排量成正比例对应关系。
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