CN112160840B - Engine control method and device and engineering mechanical vehicle - Google Patents
Engine control method and device and engineering mechanical vehicle Download PDFInfo
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- CN112160840B CN112160840B CN202011051811.6A CN202011051811A CN112160840B CN 112160840 B CN112160840 B CN 112160840B CN 202011051811 A CN202011051811 A CN 202011051811A CN 112160840 B CN112160840 B CN 112160840B
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1012—Engine speed gradient
Abstract
The embodiment of the invention discloses an engine control method and device and an engineering mechanical vehicle. The method comprises the following steps: receiving a sudden load identification result sent by the vehicle controller; if the engineering mechanical vehicle meets the sudden loading working condition, judging whether the speed dropping speed of the engine is greater than the preset speed dropping speed or not according to the rotating speed value of the engine; and if the speed dropping speed of the engine is greater than the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to be reduced so as to maintain or recover the rotating speed value of the engine within the large torque point interval. The technical scheme provided by the embodiment of the invention can control the engine to work in a low oil consumption area, and can timely adjust the running speed under the condition of suddenly increasing load, thereby avoiding flameout.
Description
Technical Field
The embodiment of the invention relates to the technical field of engine control, in particular to an engine control method and device and an engineering mechanical vehicle.
Background
Engines equipped in work machine vehicles (e.g., loaders, dozers, rollers, graders, excavators, etc.) are typically high speed engines. In the prior art, the probability that an engineering mechanical vehicle encounters a sudden loading working condition is considered to be high, and the engine is generally controlled to work near a rated rotating speed so as to ensure that high torque reserve is provided and avoid the condition that the efficiency is influenced even flameout due to excessive reduction of the rotating speed when the engineering mechanical vehicle encounters the sudden loading working condition in the operation process.
However, the low fuel consumption region of the engine generally corresponds to the large torque point interval, and the rated rotation speed is not within the large torque point interval, so that the engine deviates from the low fuel consumption region of the engine when working near the rated rotation speed, which is not beneficial to energy conservation and consumption reduction.
Disclosure of Invention
The invention provides an engine control method, an engine control device and an engineering mechanical vehicle, which are used for controlling an engine to work in a low oil consumption area and avoiding flameout when sudden load is applied.
In a first aspect, an embodiment of the present invention provides an engine control method, including:
receiving a sudden load identification result sent by the vehicle controller;
if the engineering mechanical vehicle meets the sudden loading working condition, judging whether the speed dropping speed of the engine is greater than the preset speed dropping speed or not according to the rotating speed value of the engine;
if the speed dropping speed of the engine is greater than the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to be reduced so as to maintain or recover the rotating speed value of the engine within a large torque point interval;
wherein the large torque point interval includes a first rotational speed boundary value and a second rotational speed boundary value, and the first rotational speed boundary value is smaller than the second rotational speed boundary value.
In a second aspect, an embodiment of the present invention further provides an engine control apparatus, including:
the sudden load identification result receiving module is used for receiving a sudden load identification result sent by the vehicle control unit;
the speed dropping speed judging module is used for judging whether the speed dropping speed of the engine is greater than a preset speed dropping speed or not according to the rotating speed value of the engine when the engineering mechanical vehicle meets a sudden loading working condition;
the rotating speed value maintaining module is used for controlling the running speed of the engineering machinery vehicle to be reduced when the speed dropping speed of the engine is greater than the preset speed dropping speed so as to maintain or recover the rotating speed value of the engine to be within a large torque point interval;
wherein the large torque point interval includes a first rotational speed boundary value and a second rotational speed boundary value, and the first rotational speed boundary value is smaller than the second rotational speed boundary value.
In a third aspect, an embodiment of the present invention further provides a vehicle, including: the system comprises an engine, a vehicle control unit and an engine controller, wherein the engine and the vehicle control unit are electrically connected with the engine controller;
the engine controller comprises a memory and a processor, wherein the memory stores a computer program which, when executed by the processor, implements the method of the first aspect.
According to the engine control method provided by the embodiment of the invention, the engine is controlled to work in a large torque point interval, and when the rotating speed value of the engine is reduced rapidly due to sudden load on the whole engineering machinery vehicle, the operating speed of the engineering machinery vehicle is adjusted in time, so that the rotating speed value is prevented from being reduced too much or flameout. The problem of the engine among the prior art because work deviates from the low oil consumption district near rated speed is solved, realize shifting the rotational speed value of engine during operation to big torque point interval, the effect of reduction oil consumption to and avoid suddenly adding the problem that the load arouses and flame out.
Drawings
FIG. 1 is a schematic flow chart diagram of a method for controlling an engine according to one embodiment of the present invention;
FIG. 2 is a flowchart illustrating an engine control method according to a second embodiment of the present invention;
fig. 3 is a schematic flowchart of S240 according to a second embodiment of the present invention;
fig. 4 is a schematic flowchart of another S240 according to the second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an engine control device according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention;
fig. 7 is a flowchart of a method for controlling an engine by an engine controller according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like. In addition, the embodiments and features of the embodiments in the present invention may be combined with each other without conflict.
Example one
FIG. 1 is a flow chart of an engine control method applicable to an engine control situation when a work machine vehicle is not under a sudden load condition according to an embodiment of the present disclosure; when the engineering mechanical vehicle meets a sudden loading working condition and the rotating speed value of the engine falls fast, the operating speed of the engineering mechanical vehicle is timely reduced, so that the rotating speed value of the engine is maintained or returned to a large torque point interval, the engine is prevented from being flamed out, and the problem that the engine deviates from a low oil consumption area due to the fact that the engine works near a rated rotating speed in the prior art is solved. The method can be executed by an engine control device, the device can be realized by software and/or hardware and is generally integrated on a terminal, and the terminal can be an intelligent terminal with a processing function, such as a driving computer, a vehicle-mounted computer and the like.
Referring to fig. 1, the engine control method specifically includes the steps of:
and S110, receiving a sudden load identification result sent by the vehicle control unit.
Specifically, the engineering mechanical vehicle comprises a vehicle control unit and an engine control device, and after the vehicle control unit identifies the sudden load, the sudden load identification result is sent to the engine control device. The sudden load identification result comprises two types of conditions that the engineering mechanical vehicle does not meet the sudden load condition and the engineering mechanical vehicle meets the sudden load condition. For example, when the load of earth carried in a hopper of a bulldozer (one type of work machine vehicle) suddenly increases, the work machine vehicle encounters a sudden load condition.
Optionally, S110 specifically includes: receiving the working mode of the engineering machinery vehicle sent by the vehicle controller; and when the engineering mechanical vehicle is in an operation mode, receiving the sudden load identification result sent by the vehicle controller.
Specifically, the working mode of the engineering mechanical vehicle comprises a working mode and a non-working mode, when the engineering mechanical vehicle is in the non-working mode, for example, when the excavator does not perform the excavation action, the sudden load increase working condition does not occur, at this time, the vehicle controller does not need to perform the sudden load identification, and the occupation of the vehicle controller resources can be reduced. When the engineering machinery vehicle is in an operation mode, when the excavator performs an excavation action, a sudden load increasing working condition frequently occurs, and the vehicle controller is required to perform sudden load identification in real time, so that when the engineering machinery vehicle encounters the sudden load working condition, the engine control device can be adjusted in time to maintain or recover the rotating speed value of the engine to a large torque point interval, and flameout is avoided.
And S120, if the engineering mechanical vehicle meets the sudden loading working condition, judging whether the speed dropping speed of the engine is greater than the preset speed dropping speed according to the rotating speed value of the engine.
Specifically, before the work machine vehicle encounters a sudden load condition, the torque output by the engine and the torque demand of the work machine vehicle are in a balanced state, and the engine operates in a large torque point interval (which will be explained later). At this time, if the engineering mechanical vehicle encounters a sudden load condition, the torque output by the engine will no longer meet the torque demand of the increased load. The rotating speed value of the engine can suddenly drop when meeting the sudden loading working condition, and the problem that the rotating speed value drops too much and further causes flameout can possibly occur when the rotating speed value of the engine drops too fast, so that whether the rotating speed value of the engine drops too fast or not needs to be judged in time when the engineering machinery vehicle meets the sudden loading working condition. When the falling speed is higher than the preset falling speed, the rotating speed value of the engine is reduced rapidly, and flameout may be caused; when the falling speed is less than or equal to the preset falling speed, the reduction of the rotating speed value of the engine is slow, and flameout is not easily caused or the risk of flameout is low.
Specifically, the specific value of the preset stall speed can be set by a person skilled in the art according to the performance of the engine and the performance of the engineering machinery vehicle, and is not limited herein. The specific implementation form of judging whether the speed dropping speed of the engine is greater than the preset speed dropping speed can be set by a person skilled in the art according to the actual situation, and the implementation form is not limited here.
Optionally, S120 specifically includes: if the engineering mechanical vehicle meets the sudden loading working condition, judging the first time required when the rotating speed value of the engine is reduced by a preset speed reduction value according to the rotating speed value of the engine; and if the first time is less than the preset time, determining that the speed dropping speed of the engine is greater than the preset speed dropping speed. Specifically, the specific values of the preset stall value and the first time may be set by those skilled in the art according to the performance of the engine and the performance of the work machine vehicle, and are not limited herein. Illustratively, the preset stall value may be in the range of 30-100rpm and the first time may be in the range of 2-5 s. Specifically, when the first time is less than the preset time, it is indicated that the rotating speed value of the engine is reduced faster, and the risk of causing flameout is higher; when the first time is longer than or equal to the preset time, the speed dropping speed of the engine is determined to be smaller than or equal to the preset speed dropping speed, which shows that the rotating speed value of the engine is slowly reduced, and flameout is not easily caused or the risk of flameout is low.
And S130, if the speed dropping speed of the engine is greater than the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to be reduced so as to maintain or recover the rotating speed value of the engine within a large torque point interval.
Specifically, the operating speed refers to the operating speed of the work machine vehicle, and for example, for an excavator, the operating speed refers to the speed at which the bucket of the excavator operates, and for a bulldozer and a loader, the operating speed refers to the vehicle speed. It can be understood that the operating speed of the engineering machinery vehicle is a part of the load of the engineering machinery vehicle, when the operation of the engineering machinery vehicle meets a sudden load increasing working condition, the speed of the reduction of the rotating speed value of the engine can be reduced by reducing the operating speed of the engineering machinery vehicle, and the problem that the rotating speed value of the engine is reduced more, so that flameout is caused is avoided.
Specifically, the specific implementation manner of controlling the reduction of the operating speed of the construction machine vehicle may be set by a person skilled in the art according to actual conditions, and is not limited herein.
Optionally, the method may further include:
and S140, if the engineering mechanical vehicle does not meet the sudden loading working condition, controlling the engine to keep the current rotating speed value, wherein the current rotating speed value of the engine is in a large torque point interval.
The large torque point interval comprises a first rotating speed boundary value and a second rotating speed boundary value, and the first rotating speed boundary value is larger than the second rotating speed boundary value. The large torque point interval of the engine is a performance parameter of the engine, is related to the model of the engine, can be determined through a rotating speed-oil consumption incidence relation, and is in a low-oil consumption area when the rotating speed value of the engine is in the large torque point interval.
It can be understood that when the engineering mechanical vehicle does not meet the sudden loading working condition, the requirement of the load of the engineering mechanical vehicle on the torque is not changed, and the engine is controlled to keep the current rotating speed value, so that the torque output by the engine can meet the requirement of the load on the torque.
According to the engine control method provided by the embodiment of the invention, the engine is controlled to work in a large torque point interval, and when the rotating speed value of the engine is reduced rapidly due to sudden load on the whole engineering machinery vehicle, the operating speed of the engineering machinery vehicle is adjusted in time, so that the rotating speed value is prevented from being reduced too much or flameout. The problem of the engine among the prior art because work deviates from the low oil consumption district near rated speed is solved, realize shifting the rotational speed value of engine during operation to big torque point interval, the effect of reduction oil consumption to and avoid suddenly adding the problem that the load arouses and flame out.
Example two
Fig. 2 is a flowchart illustrating an engine control method according to a second embodiment of the present invention. The present embodiment is optimized based on the above embodiments. Specifically, referring to fig. 2, the method specifically includes the following steps:
and S210, receiving a sudden load identification result sent by the vehicle control unit.
And S220, if the engineering mechanical vehicle meets the sudden loading working condition, judging whether the speed dropping speed of the engine is greater than the preset speed dropping speed according to the rotating speed value of the engine.
And S230, if the speed dropping speed of the engine is less than or equal to the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to keep unchanged.
Specifically, the magnitude of the sudden load is an important factor influencing the reduction speed of the rotation speed value of the engine, when the speed dropping speed of the engine is less than or equal to the preset speed dropping speed, the sudden load is smaller, and when the speed dropping speed of the engine is greater than the preset speed dropping speed, the sudden load is larger.
It is understood that the external characteristic curve of the rotation speed-reserve torque value is a characteristic parameter of the engine, and when the rotation speed value of the engine is a determined value, the reserve torque value of the engine at a certain rotation speed value, that is, the maximum torque value that the engine can output at the rotation speed value is known according to the external characteristic curve of the rotation speed-reserve torque value, and the actual torque output by the engine at the rotation speed value is related to the load of the engineering machinery vehicle and is less than or equal to the reserve torque value. When the sudden load is small, the rotating speed value of the engine is reduced less, and if the reserve torque value corresponding to the reduced rotating speed value is greater than or equal to the torque demand of the load after the sudden load, the balance state of the torque output by the engine and the torque demand of the load can be achieved again, and the operation speed does not need to be reduced. The preset speed reduction speed is reasonably set, so that the change of the rotating speed value of the engine is small when the sudden load is small, the engine still stays in a large torque point interval, and the torque output by the engine under the changed rotating speed value can meet the requirement of the load after the sudden load on the torque.
And S240, if the speed dropping speed of the engine is greater than the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to be reduced so as to maintain or recover the rotating speed value of the engine within a large torque point interval.
Specifically, there are various specific implementations of controlling the decrease in the operating speed of the construction machine vehicle, and a typical example will be described below, but the present application is not limited thereto.
Fig. 3 is a schematic flowchart of S240 according to a second embodiment of the present invention. Referring to fig. 3, optionally, S240 specifically includes:
and S241A, if the speed dropping speed of the engine is larger than the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to drop by a first preset running speed drop value.
Specifically, the operating speed of the engineering machinery vehicle under the sudden loading working condition is V1, the operating speed of the engineering machinery vehicle is controlled to be reduced by a first preset operating speed reduction value delta V1, and then the operating speed of the engineering machinery vehicle is reduced to V1-delta V1. Specifically, the specific value of the first preset operating speed drop value Δ V1 may be set by those skilled in the art according to actual conditions, and is not to be considered here, and for example, when the operating speed of the construction machine vehicle is referred to as a vehicle speed, Δ V1 may be set within a range of 2Km/h to 2 Km/h.
And S242A, judging whether the current rotating speed value of the engine is smaller than the first rotating speed boundary value.
Specifically, the operating speed of the construction machine vehicle (for example, the vehicle speed) is controlled to decrease by the first preset operating speed decrease value Δ V1 so that the decrease rate of the engine rotation speed value may be decreased, but when the sudden load is large, the decrease rate of the engine rotation speed value is fast, and even if the decrease rate of the engine rotation speed value can be decreased by decreasing the operating speed, the engine rotation speed value may still be rapidly decreased, and the engine rotation speed value may exceed the large torque point section. At this time, measures should be further taken to avoid engine stall due to excessive drop in the rotational speed value.
And S243A, if not, controlling the operating speed of the construction machinery vehicle to be maintained at the current operating speed so as to maintain the rotating speed value of the engine within the large torque point interval.
Specifically, if the current rotating speed value of the engine is greater than or equal to the first rotating speed boundary value, the rotating speed value of the engine is still in the large torque point interval, the rotating speed of the engineering machinery vehicle is controlled to be reduced by the first preset rotating speed reduction value Δ V1, the reduction speed of the rotating speed value is relieved to a large extent, and the rotating speed does not need to be reduced again.
S244A, if yes, judging whether the current rotating speed value of the engine is smaller than the preset lowest rotating speed value; the preset lowest rotating speed value is smaller than the first rotating speed boundary value.
Specifically, the specific value of the minimum rotation speed value may be set by a person skilled in the art according to actual conditions, and is not limited herein. Illustratively, the minimum rotation speed value can be within the range of 1200-1300 rpm.
And S245A, if yes, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to enable the rotating speed value of the engine to return to the large torque point interval.
Specifically, if the current rotating speed value of the engine is smaller than the preset minimum rotating speed value, which indicates that the rotating speed value of the engine deviates from the large-torque point interval to a large extent, the operating speed of the engineering machinery vehicle is controlled to be reduced by the first preset operating speed reduction value Δ V1, although the reducing speed of the rotating speed value is reduced to a certain extent, the rotating speed value of the engine is still rapidly reduced, at the moment, the operating speed is reduced by the second preset operating speed reduction value Δ V2, namely, the rotating speed is reduced from V1 to Δ V1 to V1 to Δ V1 to Δ V2, and the reducing speed of the rotating speed value is further reduced. Specifically, the specific value of the second preset operating speed reduction value Δ V2 may be set by those skilled in the art according to actual conditions, and is not to be considered here, and for example, when the operating speed of the construction machine vehicle is referred to as a vehicle speed, Δ V2 may be set within a range of 2Km/h to 2 Km/h.
And S246A, if not, controlling the operation speed of the engineering machinery vehicle to be maintained at the current operation speed so as to enable the rotation speed value of the engine to return to the large torque point interval.
Specifically, the current rotation speed value of the engine is greater than or equal to the preset minimum rotation speed value, which indicates that the rotation speed value of the engine exceeds the large torque point interval, but the deviation degree from the large torque point interval is small. It can be understood that, in the face of a sudden load, the engine needs a certain response time, and when the current rotation speed value of the engine deviates from the large torque point interval to a small extent, and it is possible that after a certain response time, the rotation speed value of the engine can return to the large torque interval when the torque value output by the engine meets the torque demand of the load after the sudden load.
Fig. 4 is a schematic flowchart of another S240 according to the second embodiment of the present invention. Referring to fig. 4, optionally, S240 specifically includes:
and S241B, if the speed dropping speed of the engine is larger than the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to drop by a first preset running speed drop value.
And S242B, judging whether the current rotating speed value of the engine is smaller than the first rotating speed boundary value.
And S243B, if not, controlling the operating speed of the construction machinery vehicle to be maintained at the current operating speed so as to maintain the rotating speed value of the engine within the large torque point interval.
And S244B, if yes, determining the torque demand value of the engineering machinery vehicle according to the load of the engineering machinery vehicle.
Specifically, the specific implementation of determining the torque demand of the work machine vehicle according to the load of the work machine vehicle can be set by those skilled in the art according to actual conditions, and is not limited herein.
S245B, judging whether the current rotating speed value of the engine is smaller than a preset lowest rotating speed value or not, and judging whether the torque demand value is larger than a reserve torque value corresponding to the current rotating speed value of the engine or not; the preset lowest rotating speed value is smaller than the first rotating speed boundary value.
Specifically, the reserve torque value corresponding to the current rotation speed value of the engine can be determined by searching the external characteristic curve of the rotation speed value-torque reserve value of the engine.
And S246B, if the current rotating speed value of the engine is smaller than the preset lowest rotating speed value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to enable the rotating speed value of the engine to return to the large torque point interval.
And S247B, if the torque demand value is larger than the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to maintain or recover the rotating speed value of the engine within the large torque point interval.
It can be understood that if the current torque demand value is greater than the reserve torque value corresponding to the current rotation speed value, which indicates that the current load is large, the operation speed needs to be further reduced to reduce the load, so as to narrow the gap between the torque output by the engine and the torque demand of the load as soon as possible, and avoid that the rotation speed value of the engine continuously decreases to cause flameout.
And S248B, if the current rotating speed value of the engine is larger than or equal to the preset minimum rotating speed value and the torque demand value is smaller than or equal to the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be maintained at the current operating speed so as to maintain or return the rotating speed value of the engine to be within the large torque point interval.
It can be understood that if the current rotating speed value of the engine is greater than or equal to the preset minimum rotating speed value, and the torque demand value is less than or equal to the reserve torque value, it indicates that the engine can meet the torque demand of the load at the current rotating speed value, and the operating speed is maintained at V- Δ V1 without reducing the load by reducing the operating speed. After a period of response time, the torque value output by the engine can meet the requirement of the load after the load is suddenly increased on the torque, and the rotating speed value of the engine can be returned to the large torque interval.
It can also be understood that when the current rotating speed value of the engine is smaller than the preset minimum rotating speed value or the torque demand value is larger than one of the reserve torque values corresponding to the current rotating speed value of the engine, the operating speed of the engineering machinery vehicle is controlled to be reduced, the operating speed can be adjusted more timely, and the risk of flameout caused by the fact that the rotating speed value of the engine is reduced too fast is further reduced.
And S250, controlling the running speed of the engineering machinery vehicle to return to the running speed before the engineering machinery vehicle meets the sudden loading working condition.
Specifically, after a response time, when the engine speed value is stabilized again in the large torque range, the operation speed may be slowly restored to V1. The process of slowly recovering the running speed is different from the sudden load increase, the rapid reduction of the rotating speed value of the engine can not be caused, and the flameout problem caused by the excessive reduction of the rotating speed value of the engine can not be caused.
According to the technical scheme provided by the embodiment of the invention, when the speed dropping speed of the engine is greater than the preset speed dropping speed, the running speed of the engineering machinery vehicle is controlled to be reduced by a first preset running speed reduction value, so that the trend of the quick reduction of the rotating speed value of the engine is relieved; when the current rotating speed value of the engine is still smaller than the preset lowest rotating speed value when the rotating speed is reduced by the first preset rotating speed reduction value, the rotating speed is reduced again, and the trend of rapid reduction of the rotating speed value of the engine is further relieved.
EXAMPLE III
Fig. 5 is a schematic structural diagram of an engine control device according to a third embodiment of the present invention. Referring to fig. 5, the apparatus includes: the sudden load identification result receiving module 310 is configured to receive a sudden load identification result sent by the vehicle controller;
the speed dropping speed judging module 320 is used for judging whether the speed dropping speed of the engine is greater than a preset speed dropping speed according to the rotating speed value of the engine when the engineering mechanical vehicle meets a sudden loading working condition;
the rotating speed value maintaining module 330 is used for controlling the running speed of the engineering machinery vehicle to be reduced when the speed dropping speed of the engine is greater than the preset speed dropping speed, so that the rotating speed value of the engine is maintained or returned to the large torque point interval; the large torque point interval comprises a first rotating speed boundary value and a second rotating speed boundary value, and the first rotating speed boundary value is smaller than the second rotating speed boundary value.
On the basis of the above technical solution, optionally, the stall speed determination module 320 is specifically configured to determine, according to the rotation speed value of the engine, a first time required for the rotation speed value of the engine to drop by the preset stall speed value when the engineering mechanical vehicle encounters an abrupt load condition; and if the first time is less than the preset time, determining that the speed dropping speed of the engine is greater than the preset speed dropping speed.
Optionally, the rotating speed value maintaining module 330 is specifically configured to, when the speed drop speed of the engine is greater than the preset speed drop speed, control the operating speed of the engineering machinery vehicle to decrease by a first preset operating speed decrease value; judging whether the current rotating speed value of the engine is smaller than a first rotating speed boundary value or not; if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to maintain the rotating speed value of the engine within the large torque point interval; if so, judging whether the current rotating speed value of the engine is smaller than a preset minimum rotating speed value or not; the preset lowest rotating speed value is smaller than a first rotating speed boundary value; if so, controlling the running speed of the engineering machinery vehicle to decrease by a second preset running speed decrease value so as to enable the rotating speed value of the engine to return to the large torque point interval; and if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to enable the rotating speed value of the engine to return to the large torque point interval.
Optionally, the rotating speed value maintaining module 330 is specifically configured to, when the speed drop speed of the engine is greater than the preset speed drop speed, control the operating speed of the engineering machinery vehicle to decrease by a first preset operating speed decrease value; judging whether the current rotating speed value of the engine is smaller than a first rotating speed boundary value or not; if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to maintain the rotating speed value of the engine within the large torque point interval; if yes, determining a torque demand value of the engineering machinery vehicle according to the load of the engineering machinery vehicle; judging whether the current rotating speed value of the engine is smaller than a preset minimum rotating speed value or not, and judging whether the torque demand value is larger than a reserve torque value corresponding to the current rotating speed value of the engine or not; the preset lowest rotating speed value is smaller than a first rotating speed boundary value; if the current rotating speed value of the engine is smaller than the preset lowest rotating speed value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to enable the rotating speed value of the engine to return to the large torque point interval; if the torque demand value is larger than the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to maintain or recover the rotating speed value of the engine within a large torque point interval; and if the current rotating speed value of the engine is greater than or equal to the preset minimum rotating speed value and the torque demand value is less than or equal to the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be maintained at the current operating speed so as to maintain or return the rotating speed value of the engine to the large torque point interval.
Optionally, the method further includes: the rotating speed value keeping module is used for controlling the engine to keep the current rotating speed value when the engineering mechanical vehicle does not meet the sudden loading working condition; wherein the current rotating speed value of the engine is in a large torque point interval.
Optionally, the method further includes: and the running speed maintaining module is used for controlling the running speed of the engineering machinery vehicle to be kept unchanged when the speed dropping speed of the engine is less than or equal to the preset speed dropping speed.
Optionally, the method further includes: and the running speed recovery module is used for controlling the running speed of the engineering machinery vehicle to recover to the running speed before the engineering machinery vehicle meets the sudden loading working condition.
Optionally, the sudden load identification result receiving module 310 is specifically configured to receive a working mode of the engineering mechanical vehicle sent by the vehicle controller; and when the engineering mechanical vehicle is in an operation mode, receiving the sudden load identification result sent by the vehicle controller.
The engine control device provided by the third embodiment of the invention can be used for executing the engine control method provided by the third embodiment of the invention, and has corresponding functions and beneficial effects.
Example four
Fig. 6 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention. Referring to fig. 6, the vehicle includes: the system comprises an engine 410, a vehicle controller 430 and an engine controller 420, wherein the engine 410 and the vehicle controller 430 are electrically connected with the engine controller 420; the engine controller 420 comprises a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, implements the method of any of the first and second embodiments.
For example, fig. 7 is a flowchart of a method for controlling an engine by an engine controller according to a fourth embodiment of the present invention. Referring to fig. 7, the method includes:
and S610, the engineering mechanical vehicle is in an operation mode, and the rotating speed value of the engine is in a large torque point interval.
And S620, judging whether the engineering mechanical vehicle meets the sudden loading working condition or not according to the sudden loading coincidence identification result sent by the vehicle controller. If so, go to S630, otherwise, go to S640.
And S630, judging the first time required when the rotating speed value of the engine is reduced by the preset speed reduction value according to the rotating speed value of the engine.
And S640, keeping the current state of the whole vehicle and continuing to operate.
And S650, judging whether the first time is less than the preset time. If so, go to S660, otherwise, go to S670.
And S660, controlling the operating speed of the engineering machinery vehicle to be reduced by a first preset operating speed reduction value.
And S670, controlling the running speed of the engineering machinery vehicle to keep unchanged.
And S680, judging whether the current rotating speed value of the engine is smaller than a first rotating speed boundary value. If so, go to S690, otherwise, go to S710.
And S690, determining the torque demand value of the engineering machinery vehicle according to the load of the engineering machinery vehicle.
And S710, controlling the operation speed of the engineering machinery vehicle to be maintained at the current operation speed so as to maintain the rotation speed value of the engine in a large torque point interval.
And S720, judging whether the torque demand value is larger than a reserve torque value corresponding to the current rotating speed value of the engine. If yes, go to step S730, otherwise go to step S740.
And S730, controlling the running speed of the engineering machinery vehicle to be reduced by a second preset running speed reduction value so as to enable the rotating speed value of the engine to be restored to be within the large torque point interval.
And S740, judging whether the current rotating speed value of the engine is smaller than a preset minimum rotating speed value. If yes, go to step S730, otherwise go to step S750.
And S750, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to enable the rotating speed value of the engine to return to the large torque point interval.
And S760, controlling the running speed of the engineering machinery vehicle to return to the running speed before the engineering machinery vehicle meets the sudden load working condition.
The processor in the vehicle provided by the fourth embodiment of the invention can be used for executing the engine control method provided by the above embodiment, and has corresponding functions and beneficial effects.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (13)
1. An engine control method based on engine speed, characterized by comprising:
receiving a sudden load identification result sent by the vehicle controller;
if the engineering mechanical vehicle does not meet the sudden loading working condition, controlling the engine to keep the current rotating speed value; wherein the current rotating speed value of the engine is in a large torque point interval;
if the engineering mechanical vehicle meets the sudden loading working condition, judging whether the speed dropping speed of the engine is greater than the preset speed dropping speed or not according to the rotating speed value of the engine;
if the speed falling speed of the engine is greater than the preset speed falling speed, controlling the running speed of the engineering machinery vehicle to fall by a first preset running speed falling value;
judging whether the current rotating speed value of the engine is smaller than the first rotating speed boundary value or not;
if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to maintain the rotating speed value of the engine in the large torque point interval; the running speed refers to the working speed of the engineering machinery vehicle;
if so, judging whether the current rotating speed value of the engine is smaller than a preset lowest rotating speed value or not; wherein the preset lowest rotation speed value is smaller than the first rotation speed boundary value;
if so, controlling the running speed of the engineering machinery vehicle to decrease by a second preset running speed decreasing value so as to enable the rotating speed value of the engine to return to the large torque point interval;
if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to enable the rotating speed value of the engine to return to the large torque point interval;
the large torque point interval is determined through a rotating speed-fuel consumption correlation relation, when the rotating speed value of the engine is in the large torque point interval, the engine is in a low-fuel consumption area, the large torque point interval comprises a first rotating speed boundary value and a second rotating speed boundary value, and the first rotating speed boundary value is smaller than the second rotating speed boundary value.
2. The engine control method of claim 1, wherein if the construction machinery vehicle encounters an abrupt loading condition, determining whether the stall speed of the engine is greater than a preset stall speed according to the rotation speed value of the engine comprises:
if the engineering mechanical vehicle meets the sudden loading working condition, judging the first time required when the rotating speed value of the engine is reduced by a preset speed reduction value according to the rotating speed value of the engine;
and if the first time is less than the preset time, determining that the speed dropping speed of the engine is greater than the preset speed dropping speed.
3. The engine control method according to claim 1, characterized by further comprising: and if the speed dropping speed of the engine is less than or equal to the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to keep unchanged.
4. The control method according to claim 1, wherein the step of controlling the operating speed of the work machine vehicle to decrease if the stall speed of the engine is greater than the preset stall speed so that the rotational speed value of the engine is maintained or returned to the large torque point interval further comprises:
and controlling the running speed of the engineering mechanical vehicle to return to the running speed before the engineering mechanical vehicle meets the sudden load working condition.
5. The control method according to claim 1, wherein the receiving of the sudden load recognition result sent by the vehicle control unit comprises:
receiving the working mode of the engineering machinery vehicle sent by the vehicle controller;
and when the engineering mechanical vehicle is in an operation mode, receiving a sudden load identification result sent by the vehicle controller.
6. An engine control method based on engine speed and torque, comprising:
receiving a sudden load identification result sent by the vehicle controller;
if the engineering mechanical vehicle does not meet the sudden loading working condition, controlling the engine to keep the current rotating speed value; wherein the current rotating speed value of the engine is in a large torque point interval;
if the engineering mechanical vehicle meets the sudden loading working condition, judging whether the speed dropping speed of the engine is greater than the preset speed dropping speed or not according to the rotating speed value of the engine;
if the speed falling speed of the engine is greater than the preset speed falling speed, controlling the running speed of the engineering machinery vehicle to fall by a first preset running speed falling value;
judging whether the current rotating speed value of the engine is smaller than the first rotating speed boundary value or not;
if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to maintain the rotating speed value of the engine in the large torque point interval; the operating speed is an operating speed of the construction machine vehicle;
if yes, determining a torque demand value of the engineering machinery vehicle according to the load of the engineering machinery vehicle;
judging whether the current rotating speed value of the engine is smaller than a preset lowest rotating speed value or not, and judging whether the torque demand value is larger than a reserve torque value corresponding to the current rotating speed value of the engine or not; wherein the preset lowest rotation speed value is smaller than the first rotation speed boundary value;
if the current rotating speed value of the engine is smaller than a preset lowest rotating speed value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to enable the rotating speed value of the engine to return to the large torque point interval;
if the torque demand value is larger than the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to maintain or recover the rotating speed value of the engine within the large torque point interval;
if the current rotating speed value of the engine is greater than or equal to the preset lowest rotating speed value and the torque demand value is less than or equal to the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be maintained at the current operating speed so as to maintain or recover the rotating speed value of the engine within the large torque point interval;
the large torque point interval is determined through a rotating speed-fuel consumption correlation relation, when the rotating speed value of the engine is in the large torque point interval, the engine is in a low-fuel consumption area, the large torque point interval comprises a first rotating speed boundary value and a second rotating speed boundary value, and the first rotating speed boundary value is smaller than the second rotating speed boundary value.
7. The engine control method of claim 6, wherein if the construction machinery vehicle encounters an abrupt loading condition, the determining whether the stall speed of the engine is greater than a preset stall speed according to the rotation speed value of the engine comprises:
if the engineering mechanical vehicle meets the sudden loading working condition, judging the first time required when the rotating speed value of the engine is reduced by a preset speed reduction value according to the rotating speed value of the engine;
and if the first time is less than the preset time, determining that the speed dropping speed of the engine is greater than the preset speed dropping speed.
8. The engine control method according to claim 6, characterized by further comprising: and if the speed dropping speed of the engine is less than or equal to the preset speed dropping speed, controlling the running speed of the engineering machinery vehicle to keep unchanged.
9. The control method according to claim 6, wherein the step of controlling the operating speed of the work machine vehicle to decrease if the stall speed of the engine is greater than the preset stall speed so that the rotational speed value of the engine is maintained or returned to the large torque point interval further comprises:
and controlling the running speed of the engineering mechanical vehicle to return to the running speed before the engineering mechanical vehicle meets the sudden load working condition.
10. The control method according to claim 6, wherein the receiving of the sudden load recognition result sent by the vehicle control unit comprises:
receiving the working mode of the engineering machinery vehicle sent by the vehicle controller;
and when the engineering mechanical vehicle is in an operation mode, receiving a sudden load identification result sent by the vehicle controller.
11. An engine control apparatus based on an engine speed, characterized by comprising:
the sudden load identification result receiving module is used for receiving a sudden load identification result sent by the vehicle control unit;
the speed dropping speed judging module is used for judging whether the speed dropping speed of the engine is greater than a preset speed dropping speed or not according to the rotating speed value of the engine when the engineering mechanical vehicle meets a sudden loading working condition;
the rotating speed value maintaining module is used for controlling the running speed of the engineering machinery vehicle to be reduced when the speed dropping speed of the engine is greater than the preset speed dropping speed so as to maintain or recover the rotating speed value of the engine to be within a large torque point interval;
the rotating speed value maintaining module is specifically used for controlling the operating speed of the engineering machinery vehicle to decrease by a first preset operating speed decreasing value when the speed dropping speed of the engine is greater than a preset speed dropping speed; judging whether the current rotating speed value of the engine is smaller than a first rotating speed boundary value or not; if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to maintain the rotating speed value of the engine within the large torque point interval; if so, judging whether the current rotating speed value of the engine is smaller than a preset minimum rotating speed value or not; the preset lowest rotating speed value is smaller than a first rotating speed boundary value; if so, controlling the running speed of the engineering machinery vehicle to decrease by a second preset running speed decrease value so as to enable the rotating speed value of the engine to return to the large torque point interval; if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to enable the rotating speed value of the engine to return to the large torque point interval;
the large torque point interval is determined through a rotating speed-fuel consumption correlation relation, when the rotating speed value of the engine is in the large torque point interval, the engine is in a low-fuel consumption area, the large torque point interval comprises a first rotating speed boundary value and a second rotating speed boundary value, and the first rotating speed boundary value is smaller than the second rotating speed boundary value.
12. An engine control apparatus based on engine speed and torque, comprising:
the sudden load identification result receiving module is used for receiving a sudden load identification result sent by the vehicle control unit;
the speed dropping speed judging module is used for judging whether the speed dropping speed of the engine is greater than a preset speed dropping speed or not according to the rotating speed value of the engine when the engineering mechanical vehicle meets a sudden loading working condition;
the rotating speed value maintaining module is used for controlling the running speed of the engineering machinery vehicle to be reduced when the speed dropping speed of the engine is greater than the preset speed dropping speed so as to maintain or recover the rotating speed value of the engine to be within a large torque point interval;
the rotating speed value maintaining module is specifically used for controlling the operating speed of the engineering machinery vehicle to decrease by a first preset operating speed decreasing value when the speed dropping speed of the engine is greater than a preset speed dropping speed; judging whether the current rotating speed value of the engine is smaller than a first rotating speed boundary value or not; if not, controlling the running speed of the engineering machinery vehicle to be maintained at the current running speed so as to maintain the rotating speed value of the engine within the large torque point interval; if yes, determining a torque demand value of the engineering machinery vehicle according to the load of the engineering machinery vehicle; judging whether the current rotating speed value of the engine is smaller than a preset minimum rotating speed value or not, and judging whether the torque demand value is larger than a reserve torque value corresponding to the current rotating speed value of the engine or not; the preset lowest rotating speed value is smaller than a first rotating speed boundary value; if the current rotating speed value of the engine is smaller than the preset lowest rotating speed value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to enable the rotating speed value of the engine to return to the large torque point interval; if the torque demand value is larger than the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be reduced by a second preset operating speed reduction value so as to maintain or recover the rotating speed value of the engine within a large torque point interval; if the current rotating speed value of the engine is greater than or equal to the preset lowest rotating speed value and the torque demand value is less than or equal to the reserve torque value, controlling the operating speed of the engineering machinery vehicle to be maintained at the current operating speed so as to maintain or return the rotating speed value of the engine to the large torque point interval;
the large torque point interval is determined through a rotating speed-fuel consumption correlation relation, when the rotating speed value of the engine is in the large torque point interval, the engine is in a low-fuel consumption area, the large torque point interval comprises a first rotating speed boundary value and a second rotating speed boundary value, and the first rotating speed boundary value is smaller than the second rotating speed boundary value.
13. A work machine vehicle, comprising: the system comprises an engine, a vehicle control unit and an engine controller, wherein the engine and the vehicle control unit are electrically connected with the engine controller;
the engine controller comprises a memory and a processor, wherein the memory stores a computer program which, when executed by the processor, implements the method of any of claims 1-5 or 6-10.
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| CN113294258B (en) * | 2021-05-13 | 2023-02-17 | 上海新动力汽车科技股份有限公司 | Engine constant rotating speed control method based on dynamic load |
| CN113586265B (en) * | 2021-07-27 | 2022-08-23 | 潍柴动力股份有限公司 | Engine speed regulation rate adjusting method and device and storage medium |
| CN114347989B (en) * | 2021-12-13 | 2024-04-16 | 潍柴动力股份有限公司 | Vehicle speed control method and device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01280641A (en) * | 1988-05-06 | 1989-11-10 | Iseki & Co Ltd | Load control method for agricultural working vehicle |
| CN101310113A (en) * | 2005-12-09 | 2008-11-19 | 株式会社小松制作所 | Engine-load control device for working vehicle |
| JP2009197805A (en) * | 2009-04-28 | 2009-09-03 | Komatsu Ltd | Load control device for engine of working vehicle |
| CN102677714A (en) * | 2012-06-11 | 2012-09-19 | 上海三一重机有限公司 | Rotational speed control device and method for excavator and excavator with rotational speed control device |
| CN102858678A (en) * | 2010-09-13 | 2013-01-02 | 株式会社小松制作所 | Forklift engine control device |
| CN102884296A (en) * | 2010-05-07 | 2013-01-16 | 株式会社小松制作所 | Working vehicle and method for controlling working vehicle |
| CN105155610A (en) * | 2015-08-27 | 2015-12-16 | 中国航空工业集团公司西安飞行自动控制研究所 | Power protection control method for hydraulic excavator |
| CN107044147A (en) * | 2016-02-05 | 2017-08-15 | 贵州詹阳动力重工有限公司 | A kind of BBG wheeled hydraulic excavator drive-control system and control method |
| JP2019210925A (en) * | 2018-06-08 | 2019-12-12 | 株式会社やまびこ | Engine drive-type bush cutter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2553098C (en) * | 2005-07-29 | 2013-03-26 | Honda Motor Co., Ltd. | Self-propelled work machine |
| BE1022961B1 (en) * | 2015-07-16 | 2016-10-24 | Cnh Industrial Belgium Nv | Method and device for controlling the motor speed of a work machine |
-
2020
- 2020-09-29 CN CN202011051811.6A patent/CN112160840B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01280641A (en) * | 1988-05-06 | 1989-11-10 | Iseki & Co Ltd | Load control method for agricultural working vehicle |
| CN101310113A (en) * | 2005-12-09 | 2008-11-19 | 株式会社小松制作所 | Engine-load control device for working vehicle |
| JP2009197805A (en) * | 2009-04-28 | 2009-09-03 | Komatsu Ltd | Load control device for engine of working vehicle |
| CN102884296A (en) * | 2010-05-07 | 2013-01-16 | 株式会社小松制作所 | Working vehicle and method for controlling working vehicle |
| CN102858678A (en) * | 2010-09-13 | 2013-01-02 | 株式会社小松制作所 | Forklift engine control device |
| CN102677714A (en) * | 2012-06-11 | 2012-09-19 | 上海三一重机有限公司 | Rotational speed control device and method for excavator and excavator with rotational speed control device |
| CN105155610A (en) * | 2015-08-27 | 2015-12-16 | 中国航空工业集团公司西安飞行自动控制研究所 | Power protection control method for hydraulic excavator |
| CN107044147A (en) * | 2016-02-05 | 2017-08-15 | 贵州詹阳动力重工有限公司 | A kind of BBG wheeled hydraulic excavator drive-control system and control method |
| JP2019210925A (en) * | 2018-06-08 | 2019-12-12 | 株式会社やまびこ | Engine drive-type bush cutter |
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