CN112459162A - Working condition adaptive power system, control method and loader-digger - Google Patents
Working condition adaptive power system, control method and loader-digger Download PDFInfo
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- CN112459162A CN112459162A CN202011337214.XA CN202011337214A CN112459162A CN 112459162 A CN112459162 A CN 112459162A CN 202011337214 A CN202011337214 A CN 202011337214A CN 112459162 A CN112459162 A CN 112459162A
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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
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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
- E02F9/2025—Particular purposes of control systems not otherwise provided for
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
- E02F9/207—Control of propulsion units of the type electric propulsion units, e.g. electric motors or generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The disclosure relates to a working condition adaptive power system, a control method and a loader-digger. The operating mode adaptation driving system includes: the electric control engine (1) is provided with a plurality of power curves, and the power curves are used for representing the relation between the rotating speed and the output torque of the electric control engine (1); a plurality of execution subsystems (21; 22; 23) which are all operably connected with the electronic control engine (1) and are configured to execute corresponding operations according to the power provided by the electronic control engine (1) under different working conditions; and the controller (3) is in signal connection with the electric control engine (1) and the execution subsystems (21; 22; 23), is configured to judge the current working condition in an automatic mode, and enables the electric control engine (1) to operate a corresponding power curve according to the current working condition. The embodiment of the disclosure can realize self-adaption to various working conditions.
Description
Technical Field
The disclosure relates to the field of engineering machinery, in particular to a working condition adaptive power system, a control method and a loader-digger.
Background
The loader-digger is an engineering mechanical equipment capable of meeting various working conditions such as digging, loading by shovels, carrying, crushing, field leveling and the like. Because the excavating loader has the characteristics of both the loader and the excavator, the excavating characteristic of the excavating loader often requires that the power taken by a hydraulic system is close to the power of an engine. However, under the working condition of the shovel-loading combined operation, the sum of the power consumption of the whole vehicle in running and the power consumption of the hydraulic system is larger than the power of the engine, so that the engine is easy to stall. This phenomenon is more pronounced, particularly throughout the life cycle of the vehicle, with later reductions in hydraulic and mechanical efficiency.
In order to overcome the phenomenon, in some related technologies applied to a low emission requirement area, a mechanical low-speed high-torque engine is adopted, and the maximum torque of the engine is increased and controlled to be about 1200r/min so as to avoid the risk of flameout. In other related technologies applied to areas with high emission requirements, an electronic control engine and an electronic control hydraulic system are adopted to realize combined response control of load power and output power of the hydraulic system, and for excavation work conditions, under different engine rotating speeds and according to different engine torques, different current signals are adopted to control power of a hydraulic pump so as to keep the power at different levels; and for the loading operation working condition, the power of the hydraulic pump is controlled by adopting a single current signal, so that the characteristic of large flow under the condition of low load is ensured.
Disclosure of Invention
Research shows that the use of a mechanical low-speed large-torque engine in the related art causes the reduction of the operation efficiency, and when the engine is applied to engineering machinery, the torque point of the engine generally falls within the range of 1400-1700r/min, so that the engine can provide more severe requirements for a turbocharger and is difficult to realize; for an electric control engine and an electric control hydraulic system in the related technology, under the working condition of excavation operation, a customer hardly judges which working condition selects which rotating speed and which displacement to carry out operation construction, and the selection is easy to be wrong, so that the working condition adaptability of a power system is hardly ensured, and the combined control of a single engine power curve and a hydraulic system is narrow in the working condition adaptive range, so that the combined control is hardly suitable for various machines and tools with wide load distribution of an excavating loader.
In view of this, the embodiment of the disclosure provides a working condition adaptive power system, a control method and a loader-digger, which can realize self-adaptation to various working conditions.
In one aspect of the present disclosure, a condition-adaptive power system is provided, including:
the electric control engine is provided with a plurality of power curves, and the power curves are used for representing the relation between the rotating speed and the output torque of the electric control engine;
a plurality of execution subsystems, which are all operably connected with the electronic control engine and are configured to execute corresponding operations according to power provided by the electronic control engine under different working conditions;
and the controller is in signal connection with the electric control engine and the execution subsystems and is configured to judge the current working condition in an automatic mode and enable the electric control engine to operate a corresponding power curve according to the current working condition.
In some embodiments, the controller is further configured to operate the electronically controlled engine in a manual mode according to an externally input command to select a power curve.
In some embodiments, the plurality of execution subsystems comprises: a travel subsystem of the work machine and at least one work subsystem of the work machine; the operating mode adaptation driving system further comprises:
a seat orientation sensor configured to detect an orientation of a seat of an operator of the work machine relative to a normal travel direction of the work machine;
a gearbox disposed between the electronically controlled engine and the plurality of execution subsystems;
the controller is in signal connection with the seat orientation sensor and the gearbox, is configured to determine whether the current working condition is a running working condition according to a detection signal of the seat orientation sensor and a gear of the gearbox, and enables the electronic control engine to operate a power curve, corresponding to the maximum output power of the electronic control engine, in the plurality of power curves when the current working condition is determined to be the running working condition.
In some embodiments, the controller is configured to determine whether the current operating condition is an operating condition according to a detection signal of the seat orientation sensor and a gear of the transmission, and when the current operating condition is determined to be the operating condition, first enable the electronically controlled engine to operate a power curve corresponding to the minimum output power of the electronically controlled engine in the plurality of power curves, determine a value range corresponding to a torque percentage of the electronically controlled engine or determine whether a rotating speed reduction value of the electronically controlled engine is smaller than a set value, and enable the electronically controlled engine to maintain operation in the current power curve or other power curves in the plurality of power curves according to the value range or the rotating speed determination result.
In some embodiments, the plurality of power curves includes a first power curve, a second power curve, and a third power curve, the output power of the electronically controlled engine operating on the second power curve is greater than the output power of the electronically controlled engine operating on the first power curve, and the output power of the electronically controlled engine operating on the third power curve is greater than the output power of the electronically controlled engine operating on the second power curve; the at least one work subsystem of the work machine comprises a shovel subsystem and an excavating subsystem of the loader-digger;
the controller is configured to operate the electronically controlled engine at the third power curve when the current operating condition is determined to be a driving operating condition;
when the current working condition is determined to be a shovel loading working condition, firstly enabling the electric control engine to operate in the first power curve;
when the value range corresponding to the torque percentage of the electronic control engine is determined to be not larger than a first threshold value, the electronic control engine is enabled to maintain to operate in the first power curve;
when the value range corresponding to the torque percentage of the electronic control engine is determined to be larger than a first threshold value and not larger than a second threshold value, the electronic control engine is enabled to operate in the second power curve;
when the torque percentage corresponding value range of the electronic control engine is determined to be larger than a second threshold value, the electronic control engine is enabled to operate in the third power curve,
wherein the second threshold is greater than the first threshold.
In some embodiments, the plurality of power curves includes a first power curve, a second power curve, and a third power curve, the output power of the electronically controlled engine operating on the second power curve is greater than the output power of the electronically controlled engine operating on the first power curve, and the output power of the electronically controlled engine operating on the third power curve is greater than the output power of the electronically controlled engine operating on the second power curve; the at least one work subsystem of the work machine comprises a shovel subsystem and an excavating subsystem of the loader-digger;
the controller is configured to operate the electronically controlled engine at the third power curve when the current operating condition is determined to be a driving operating condition;
when the current working condition is determined to be an excavation working condition, firstly enabling the electric control engine to operate at the first power curve;
when the value range corresponding to the torque percentage of the electronic control engine is determined to be not larger than a first threshold value or the rotating speed reduction value of the electronic control engine is not larger than a set value, the electronic control engine is enabled to maintain to operate in the first power curve;
when the value range corresponding to the torque percentage of the electronic control engine is determined to be larger than a first threshold value and not larger than a second threshold value or the rotating speed reduction value of the electronic control engine is larger than a set value, the electronic control engine is enabled to operate in the second power curve;
when the torque percentage corresponding value range of the electric control engine is determined to be larger than a second threshold value or the rotating speed reduction value of the electric control engine is larger than a set value, the electric control engine is enabled to operate in the third power curve,
wherein the second threshold is greater than the first threshold.
In some embodiments, the output power corresponding to the third power curve is greater than the output power corresponding to the power curves taken by the variable displacement hydraulic pumps used by the shovel subsystem and the digging subsystem of the loader-digger.
In some embodiments, the controller is configured to determine that the operator's seat is facing in a positive direction according to a detection signal of the seat facing sensor, and determine that the current operating condition is a driving condition when the gear of the transmission is in a high-speed gear;
determining the positive direction of the seat orientation of the operator according to the detection signal of the seat orientation sensor, and determining that the current working condition is a loading operation working condition when the gear of the gearbox is determined to be a low-speed gear;
and when the seat of the operator is determined to face the opposite direction according to the detection signal of the seat facing sensor, determining that the current working condition is the excavation working condition.
In one aspect of the disclosure, a backhoe loader is provided that includes the aforementioned condition-adaptive power system.
In one aspect of the present disclosure, a control method for adapting a power system based on the aforementioned operating condition is provided, which includes:
judging the current working condition in an automatic mode;
and enabling the electronic control engine to operate the corresponding power curve in the plurality of power curves according to the current working condition, so that the plurality of execution subsystems execute corresponding operation according to the power provided by the electronic control engine under different working conditions.
In some embodiments, the control method further comprises:
and in the manual mode, the electronic control engine operates the selected power curve in the plurality of power curves according to an externally input command for selecting the power curve.
Therefore, according to the embodiment of the disclosure, the current working condition is judged in the automatic mode, and the proper power curve is selected from the multiple power curves of the electric control engine according to the current working condition, so that the power system can be better adapted to the working condition and to multiple types and loads of machines and tools used by the working machine.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of some embodiments of an adaptive powertrain system according to the disclosed operating conditions;
FIG. 2 is a speed torque curve diagram of some embodiments of an adaptive powertrain system according to the disclosed operating conditions;
FIG. 3 is a schematic structural diagram of some embodiments of a backhoe loader according to the present disclosure;
FIG. 4 is a schematic flow chart diagram of some embodiments of a control method according to the present disclosure;
FIG. 5 is a flow chart schematic of further embodiments of control methods according to the present disclosure.
It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
FIG. 1 is a schematic diagram of some embodiments of an adaptive powertrain system according to the disclosed operating conditions. FIG. 2 is a speed torque curve diagram of some embodiments of an adaptive powertrain system according to the disclosed operating conditions. Referring to FIG. 1, in some embodiments, a condition adaptive powertrain system includes: the system comprises an electronic control engine 1, a plurality of execution subsystems and a controller 3. The electronically controlled engine 1 has a plurality of power curves representing the relationship between the rotational speed and the output torque of the electronically controlled engine 1. The power curve may be programmed by the engine manufacturer as required. For example: in fig. 2, the electronically controlled engine 1 has at least three power curves G1, G2, and G3.
A plurality of execution subsystems are all operably connected with the electronic control engine 1 and are configured to execute corresponding operations according to power provided by the electronic control engine 1 under different working conditions. Three execution subsystems 21, 22 and 23 are schematically shown in fig. 1, and each of the execution subsystems can execute a corresponding work action under the driving of the electronically controlled engine 1.
The controller 3 is in signal connection with the electronically controlled engine 1 and the plurality of execution subsystems, and is configured to judge a current working condition in an automatic mode and enable the electronically controlled engine 1 to operate a corresponding power curve according to the current working condition.
The controller of the embodiment judges the current working condition in the automatic mode and selects a proper power curve from a plurality of power curves of the electric control engine according to the current working condition, so that the power system can be better adapted to the working condition and is adapted to various types and loads of machines and tools used by the working machine.
In order to facilitate the operator of the work machine to control the electronically controlled engine and the implement subsystem according to the actual conditions, in some embodiments, the controller 3 is further configured to operate the electronically controlled engine 1 according to an externally input command for selecting a power curve in a manual mode. The operator can input a selection instruction through an external device (e.g., a button on an operation panel, a handle, a keyboard, or the like, or a touch panel, or the like) communicatively connected to the controller 3.
Fig. 3 is a schematic structural diagram of some embodiments of a backhoe loader according to the present disclosure. Referring to fig. 3, in some embodiments, the plurality of execution subsystems may include: a travel subsystem of a work machine (e.g., an excavating loader, etc.) and at least one work subsystem of the work machine (e.g., a travel subsystem, a shovel subsystem, and an excavating subsystem). In other embodiments, the work machine may be a work machine (e.g., a crane, a pump truck, etc.) or another type of work machine (e.g., a sweeper truck, an aerial lift truck, a fire truck, etc.).
Taking the backhoe loader as an example, in fig. 3, the driving subsystem of the backhoe loader may include a front axle assembly 4, a rear axle assembly 7, a steering wheel 9 and a seat 10, the front and rear axle assemblies include a transmission shaft, a drive axle and tires, the shoveling subsystem may include the front axle assembly 4, the rear axle assembly 7, the steering wheel 9, the seat 10, a loading device 8 and a hydraulic system 6, the front and rear axle assemblies include a transmission shaft, a drive axle and tires, and the backhing subsystem may include the backhing device 11 and the hydraulic system 6.
In some embodiments, the condition-adaptive power system further comprises: seat orientation sensor and gearbox 5. The seat orientation sensor may be configured to detect an orientation of a seat of an operator of the work machine relative to a normal travel direction of the work machine. A gearbox 5 may be arranged between said electronically controlled engine 1 and said plurality of execution subsystems, for example the gearbox 5 is arranged between the electronically controlled engine 1 and the hydraulic system 6. The hydraulic system 6 may comprise a variable hydraulic pump, as well as hydraulic valves, etc.
The controller 3 is in signal connection with the seat orientation sensor and the gearbox 5. The controller 3 may determine whether the current operating condition is a driving condition according to the detection signal of the seat orientation sensor and the gear position of the transmission. When the current working condition is determined to be a driving working condition, the controller 3 enables the electronic control engine 1 to operate a power curve corresponding to the maximum output power of the electronic control engine 1 in the plurality of power curves. This can realize a further running speed.
In some embodiments, the controller 3 may further determine whether the current operating condition is a working condition according to the detection signal of the seat orientation sensor and the gear position of the transmission. When it is determined that the current operating condition is an operating condition, the controller 3 may first cause the electronically controlled engine 1 to operate a power curve corresponding to the minimum output power of the electronically controlled engine 1 among the plurality of power curves. Then, a value range corresponding to the torque percentage of the electronic control engine 1 is determined or whether the rotating speed reduction value of the electronic control engine 1 is smaller than a set value is judged, and the electronic control engine 1 is enabled to maintain to operate in the current power curve or other power curves in the plurality of power curves according to the value range or the rotating speed judgment result. The torque percentage is the ratio of the torque output by the electronically controlled engine to the maximum torque of the current power curve.
Therefore, when the current working condition is determined to be the working condition, the power curve with lower output power is adopted firstly to reduce energy consumption. If the torque percentage of the electronically controlled engine 1 is high or if the rotational speed reduction is high, this indicates that the current power curve is not sufficient to meet the current load demand, and therefore other power curves with higher output power may be selected.
Referring to fig. 2, the abscissa of the power curve of the electronically controlled engine 1 is the rotational speed and the ordinate is the torque. Torque is proportional to output power and inversely proportional to speed, for example, the relationship between output power P and speed n and torque T: t is (9550 × P)/N, T is in N · m, P is in KW, and N is in r/min.
In fig. 2, the plurality of power curves includes a first power curve G1, a second power curve G2, and a third power curve G3, the output power of the electronically controlled engine 1 operating on the second power curve G2 is greater than the output power of the electronically controlled engine 1 operating on the first power curve G1, and the output power of the electronically controlled engine 1 operating on the third power curve G3 is greater than the output power of the electronically controlled engine 1 operating on the second power curve G2.
Fig. 2 also shows a power curve g1 for the variable displacement hydraulic pump. Considering that the power curve of the variable hydraulic pump is determined according to the working function of the engineering machine, the power curve of the variable hydraulic pump is matched with the power curve of the electronic control engine. The power of the variable hydraulic pump is derived from the electrically controlled engine, the power taken by the pump cannot exceed the maximum output power of the engine, otherwise the engine is shut down, and meanwhile the reaction capacity of the engine and the power of the removed accessories are considered (for example, the power of the engine needs to be taken by the accessories such as a fan, and the power feedback of a hydraulic system is faster than that of the engine), so that the output power corresponding to the third power curve G3 is preferably larger than the output power corresponding to the power taken curve G1 of the variable hydraulic pump. The third power curve G3 corresponds to the maximum output power of the electronically controlled engine 1. The maximum power of the variable hydraulic pump can account for 90-95% of the output power of the electric control engine.
In fig. 2, the output curves corresponding to the second power curve G2 and the first power curve G1 may be smaller than the output power corresponding to the power curve G1 of the variable displacement hydraulic pump. In other embodiments, G2 or G1 may be larger than the output power corresponding to the power curve G1 of the variable displacement hydraulic pump.
Curve g2 in fig. 2 is the remaining power curve after subtracting the power drawn by the hydraulic system from the engine output power. Curves g3 and g4 correspond to engine to transmission matching ranges i of 0.95 and i of 0, respectively. Where, i-0 indicates that the vehicle is in a stationary state, and the traction force is maximum at this time, and i-0.95 indicates that the vehicle is traveling at the maximum vehicle speed and the traction force is minimum. Under the driving working condition, a third power curve G3 is selected, and the third power curve G3 is intersected with the curves G1 and G2 in a high rotating speed area, so that the traction force and the vehicle speed are increased, and stronger power performance is obtained.
In some embodiments, controller 3 first operates electronically controlled engine 1 at first power curve G1 when determining that the current operating condition is a shovel loading operating condition. When the value range corresponding to the torque percentage of the electronic control engine 1 is determined to be not more than a first threshold value X1%, the electronic control engine 1 is enabled to maintain to operate in the first power curve G1, and when the value range corresponding to the torque percentage of the electronic control engine 1 is determined to be more than a first threshold value X1% and not more than a second threshold value X2%, the electronic control engine 1 is enabled to operate in the second power curve G2; and when the torque percentage corresponding value range of the electronic control engine 1 is determined to be larger than a second threshold value X2%, enabling the electronic control engine 1 to operate in the third power curve G3. Wherein the second threshold X2% is greater than the first threshold X1%.
When the torque percentage is in different value intervals, the energy consumption can be reduced on the basis of meeting the operation requirement of the operation subsystem by gradually selecting a power curve with higher power output.
In some embodiments, controller 3 first operates electronically controlled engine 1 at first power curve G1 when determining that the current operating condition is a digging operation condition. When it is determined that the value range corresponding to the torque percentage of the electronically controlled engine 1 is not greater than the first threshold value X1% or the rotational speed reduction value of the electronically controlled engine 1 is not greater than a set value, the controller may maintain the electronically controlled engine 1 operating at the first power curve G1.
And when the value range corresponding to the torque percentage of the electronic control engine 1 is determined to be greater than a first threshold value X1% and not greater than a second threshold value X2% or the rotating speed reduction value delta N of the electronic control engine 1 is greater than a set value delta, enabling the electronic control engine 1 to operate in the second power curve G2. When it is determined that the torque percentage corresponding value range of the electronic control engine 1 is greater than the second threshold value X2% or the rotation speed reduction value Δ N of the electronic control engine 1 is greater than the set value δ, the controller may operate the electronic control engine 1 in the third power curve G3. Wherein the second threshold X2% is greater than the first threshold X1%.
When the torque percentage is in different value intervals or the rotating speed reduction value delta N is larger than the set value delta, the energy consumption can be reduced on the basis of meeting the operation requirement of the operation subsystem by gradually selecting a power curve with higher power output.
In the above embodiment, the controller 3 may determine that the current operating condition is a driving condition when determining that the operator's seat is facing a positive direction (i.e., a driving direction) and determining that the gear of the transmission is in a high-speed gear according to the detection signal of the seat facing sensor. At this time, the operator sits in the cabin toward the traveling direction and travels at a higher speed.
Considering that the loading device 8 and the excavating device 11 are located in the forward direction on the front side and the rear side of the cabin, respectively, the currently steered work subsystem can be determined according to the seat orientation. For example: the controller can be based on the detection signal of seat orientation sensor confirms operator's seat is towards the positive direction, and confirms when the gear of gearbox is in the low-speed gear, confirms current operating mode is the loading operation operating mode, and according to the detection signal of seat orientation sensor confirms operator's seat is towards when the negative direction, confirms current operating mode is for excavating the operation operating mode.
The embodiment of the power system adapting to various working conditions can be applied to various working machines, such as an excavating loader. The present disclosure thus also provides for an embodiment of a backhoe loader including any of the embodiments of the condition adaptive power system described above.
Fig. 4 is a flow diagram of some embodiments of a control method according to the present disclosure. Based on the foregoing operating condition-adaptive powertrain embodiments, and with reference to FIG. 4, in some embodiments, the control method may include steps 100 and 200. In step 100, in the automatic mode, the current operating condition is determined. In step 200, the electronically controlled engine 1 is operated according to the current operating condition to operate a corresponding power curve of the plurality of power curves, so that a plurality of execution subsystems execute corresponding operations according to power provided by the electronically controlled engine 1 under different operating conditions.
FIG. 5 is a flow chart schematic of further embodiments of control methods according to the present disclosure. Referring to fig. 5, in some embodiments, the control method further includes steps 300 and 400. In step 300, in the manual mode, an externally input command to select a power curve is received. In step 400, the electronically controlled engine 1 is caused to operate the selected one of the plurality of power curves in accordance with an externally input command to select the power curve.
In the present specification, a plurality of embodiments are described in a progressive manner, the emphasis of each embodiment is different, and the same or similar parts between the embodiments are referred to each other. For the method embodiment, since the whole and related steps have corresponding relations with the contents in the system embodiment, the description is relatively simple, and the relevant points can be referred to the partial description of the system embodiment.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (11)
1. A condition-adaptive power system, comprising:
the electric control engine (1) is provided with a plurality of power curves, and the power curves are used for representing the relation between the rotating speed and the output torque of the electric control engine (1);
a plurality of execution subsystems (21; 22; 23) which are all operably connected with the electronic control engine (1) and are configured to execute corresponding operations according to the power provided by the electronic control engine (1) under different working conditions;
and the controller (3) is in signal connection with the electric control engine (1) and the execution subsystems (21; 22; 23), is configured to judge the current working condition in an automatic mode, and enables the electric control engine (1) to operate a corresponding power curve according to the current working condition.
2. The condition-adaptive power system according to claim 1, wherein the controller (3) is further configured to operate the electronically controlled engine (1) according to an externally input command for selecting a power curve in a manual mode according to the selected power curve.
3. The condition-adaptive power system according to claim 1, wherein the plurality of execution subsystems (21; 22; 23) comprise: a travel subsystem of the work machine and at least one work subsystem of the work machine; the operating mode adaptation driving system further comprises:
a seat orientation sensor configured to detect an orientation of a seat of an operator of the work machine relative to a normal travel direction of the work machine;
a gearbox arranged between the electronically controlled engine (1) and the plurality of execution subsystems (21; 22; 23);
the controller (3) is in signal connection with the seat orientation sensor and the gearbox, is configured to determine whether the current working condition is a running working condition according to a detection signal of the seat orientation sensor and a gear of the gearbox, and enables the electronic control engine (1) to operate a power curve corresponding to the maximum output power of the electronic control engine (1) in the plurality of power curves when the current working condition is determined to be the running working condition.
4. The condition-adaptive power system according to claim 3, wherein the controller (3) is configured to determine whether the current condition is an operating condition according to the detection signal of the seat orientation sensor and the gear of the transmission, and when the current condition is determined to be the operating condition, first enable the electronically controlled engine (1) to operate a power curve corresponding to the minimum output power of the electronically controlled engine (1) in the plurality of power curves, and determine a value range corresponding to a torque percentage of the electronically controlled engine (1) or determine whether a rotating speed reduction value of the electronically controlled engine (1) is smaller than a set value, and enable the electronically controlled engine (1) to maintain operation in the current power curve or other power curves in the plurality of power curves according to the value range or the rotating speed determination result.
5. The condition-adaptive power system according to claim 4, characterized in that the plurality of power curves comprises a first power curve (G1), a second power curve (G2) and a third power curve (G3), the output power of the electronically controlled engine (1) operating on the second power curve (G2) is greater than the output power of the electronically controlled engine (1) operating on the first power curve (G1), the output power of the electronically controlled engine (1) operating on the third power curve (G3) is greater than the output power of the electronically controlled engine (1) operating on the second power curve (G2); the at least one work subsystem of the work machine comprises a shovel subsystem and an excavating subsystem of the loader-digger;
the controller (3) is configured to operate the electronically controlled engine (1) at the third power curve (G3) when the current operating condition is determined to be a driving condition;
when the current working condition is determined to be a shovel loading working condition, firstly enabling the electronic control engine (1) to operate on the first power curve (G1);
when the value range corresponding to the torque percentage of the electronic control engine (1) is determined to be not larger than a first threshold value, the electronic control engine (1) is enabled to maintain to operate at the first power curve (G1);
when the value range corresponding to the torque percentage of the electronic control engine (1) is determined to be larger than a first threshold value and not larger than a second threshold value, enabling the electronic control engine (1) to operate in the second power curve (G2);
operating the electronically controlled engine (1) at the third power curve (G3) upon determining that a torque percentage corresponding span of the electronically controlled engine (1) is greater than a second threshold,
wherein the second threshold is greater than the first threshold.
6. The condition-adaptive power system according to claim 4, characterized in that the plurality of power curves comprises a first power curve (G1), a second power curve (G2) and a third power curve (G3), the output power of the electronically controlled engine (1) operating on the second power curve (G2) is greater than the output power of the electronically controlled engine (1) operating on the first power curve (G1), the output power of the electronically controlled engine (1) operating on the third power curve (G3) is greater than the output power of the electronically controlled engine (1) operating on the second power curve (G2); the at least one work subsystem of the work machine comprises a shovel subsystem and an excavating subsystem of the loader-digger;
the controller (3) is configured to operate the electronically controlled engine (1) at the third power curve (G3) when the current operating condition is determined to be a driving condition;
when the current working condition is determined to be the excavation working condition, firstly enabling the electronic control engine (1) to operate at the first power curve (G1);
when the value range corresponding to the torque percentage of the electronic control engine (1) is determined to be not larger than a first threshold value or the rotating speed reduction value of the electronic control engine (1) is not larger than a set value, the electronic control engine (1) is enabled to maintain to operate in the first power curve (G1);
when the value range corresponding to the torque percentage of the electronic control engine (1) is determined to be larger than a first threshold value and not larger than a second threshold value or the rotating speed reduction value of the electronic control engine (1) is larger than a set value, enabling the electronic control engine (1) to operate in the second power curve (G2);
when the torque percentage corresponding value range of the electric control engine (1) is determined to be larger than a second threshold value or the rotating speed reduction value of the electric control engine (1) is larger than a set value, the electric control engine (1) is enabled to operate in the third power curve (G3),
wherein the second threshold is greater than the first threshold.
7. A condition-adaptive power system according to claim 5 or 6, characterized in that the output power corresponding to the third power curve (G3) is greater than the output power corresponding to the power curve (G1) taken by the variable displacement hydraulic pumps used by the shovel and excavation subsystems of the loader-digger.
8. The condition-adaptive power system according to claim 5 or 6, wherein the controller (3) is configured to determine that the operator's seat is facing in a positive direction based on the detection signal of the seat facing sensor, and determine that the current condition is a driving condition when the gear of the transmission is in a high-speed gear;
determining the positive direction of the seat orientation of the operator according to the detection signal of the seat orientation sensor, and determining that the current working condition is a loading operation working condition when the gear of the gearbox is determined to be a low-speed gear;
and when the seat of the operator is determined to face the opposite direction according to the detection signal of the seat facing sensor, determining that the current working condition is the excavation working condition.
9. A backhoe loader comprising:
the operating condition adaptive power system of any one of claims 1 to 8.
10. A control method for a working condition adaptive power system based on any one of claims 1 to 8 is characterized by comprising the following steps:
judging the current working condition in an automatic mode;
and enabling the electric control engine (1) to operate the corresponding power curve in the plurality of power curves according to the current working condition, so that the plurality of execution subsystems (21; 22; 23) execute corresponding operation according to the power provided by the electric control engine (1) under different working conditions.
11. The control method according to claim 10, characterized by further comprising:
and in the manual mode, the electric control engine (1) is enabled to operate the selected power curve in the plurality of power curves according to an externally input command for selecting the power curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011337214.XA CN112459162A (en) | 2020-11-25 | 2020-11-25 | Working condition adaptive power system, control method and loader-digger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011337214.XA CN112459162A (en) | 2020-11-25 | 2020-11-25 | Working condition adaptive power system, control method and loader-digger |
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| CN112459162A true CN112459162A (en) | 2021-03-09 |
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| CN202011337214.XA Pending CN112459162A (en) | 2020-11-25 | 2020-11-25 | Working condition adaptive power system, control method and loader-digger |
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| CN111549848A (en) * | 2020-05-18 | 2020-08-18 | 三一重机有限公司 | Hydraulic system and control method of backhoe loader and backhoe loader |
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| JP2005098216A (en) * | 2003-09-25 | 2005-04-14 | Komatsu Ltd | Engine output control device |
| US20090036270A1 (en) * | 2007-07-30 | 2009-02-05 | Komatsu Ltd. | Working vehicle |
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