CN110735726B - Energy-saving control method for engine of engineering machinery - Google Patents
Energy-saving control method for engine of engineering machinery Download PDFInfo
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- CN110735726B CN110735726B CN201911070831.5A CN201911070831A CN110735726B CN 110735726 B CN110735726 B CN 110735726B CN 201911070831 A CN201911070831 A CN 201911070831A CN 110735726 B CN110735726 B CN 110735726B
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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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Abstract
The invention discloses an energy-saving control method for an engine of an engineering machine, which comprises the steps of firstly, synchronously acquiring load data and engine data at a high speed through recorded broadcasting of a controller, carrying out correlation analysis on the relation between the load data and the engine data, analyzing the control strategy and the control effect of the engine, and carrying out recorded broadcasting analysis and evaluation; secondly, determining a target point of the optimal oil consumption area through calculation according to the universal characteristic curve of the engine; finally, the engine speed and/or the current of the hydraulic pump are regulated to the optimal oil consumption area through a control means. Compared with the prior art, the energy-saving control method can visually adjust the engine control strategy while synchronously acquiring the load data and the engine data on line until the optimal universal characteristic curve path is selected to enter the optimal oil consumption area, and has the advantages of high intelligent degree, information visualization, energy conservation and emission reduction.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to an energy-saving control method for an engine of the engineering machinery.
Background
At present, the energy utilization rate of the engineering machinery is low, so that energy conservation is always a key research topic of the engineering machinery. One of the main reasons for the low energy utilization of the engineering machinery is: due to the change of the load condition, the hydraulic pump and the engine cannot keep good matching, so that the engine cannot operate at the optimal working point or the optimal working area.
Chinese patent ZL201210086662.6 discloses an engine energy-saving control method, an energy-saving controller, a system and engineering machinery, which judges the working state of an engine according to the pressure change of a main pump hydraulic valve, controls the engine to automatically stop according to the real-time rotating speed of the engine collected by an engine controller ECM when the engine is in a non-working state, is beneficial to controlling the engine according to the actual working condition, avoids the engine from always running at a high speed, reduces the loss of the engine, reduces the oil consumption, saves energy and protects the environment; chinese patent ZL201410399004.1 discloses an energy-saving control system, method and device of a vehicle engine and an engineering vehicle, wherein the current load operation gear of a multi-state switch is adaptively adjusted according to the load operation working condition, so that the engine operates in different states to reduce the oil consumption, and the adjustment control precision is improved, thereby effectively improving the load rate of the operation of the engine by adjusting the load operation gear of the multi-state switch, and further reducing the oil consumption of the engine in the transportation operation of the engineering vehicle. The energy-saving control method really achieves the effect of reducing the oil consumption of the engine to a certain extent, but cannot monitor the working state of the engine and the real-time position of the universal characteristic curve in real time on line, and although the oil consumption and the energy saving are achieved finally, the energy-saving control method selects a path of the universal characteristic curve which passes through in view of the fact that the universal characteristic curve is not public and unadjustable, and is not optimal and the energy-saving effect is not optimal.
Disclosure of Invention
In view of the above, the invention provides an energy-saving control method for an engine of an engineering machine, which has the capability of acquiring data recording at a high speed, visually adjusts the engine control strategy while synchronously acquiring load data and engine data on line until an optimal universal characteristic curve path is selected to enter an optimal oil consumption area, and has the advantages of high intelligent degree, information visualization, energy conservation and emission reduction.
On one hand, the invention provides an energy-saving control method for an engine of engineering machinery, which comprises the following steps:
s100, synchronously acquiring load data and engine data at a high speed through recorded broadcasting by a controller, performing correlation analysis on the relationship between the load data and the engine data, analyzing the control strategy and the control effect of the engine, and performing recorded broadcasting analysis and evaluation;
step S200, determining a target point of an optimal oil consumption area through calculation according to the universal characteristic curve of the engine;
and step S300, adjusting the rotating speed of the engine and/or the current of the hydraulic pump to an optimal oil consumption area through a control means.
Further, the load data and the engine data include an engine speed, a load torque, a regulated current of a hydraulic pump, and an outlet pressure; the dimensionality of the relational correlation analysis between the load data and the engine data comprises target definition, behavior analysis, load prediction, dynamic rapid adjustment and online adjustment, wherein:
the target is definitely expressed by confirming the target position of the optimal fuel consumption area according to the universal characteristic curve of the engine;
the behavior analysis shows that the working state of the engine and the real-time position of the universal characteristic curve are known in real time;
the load prediction is realized by predicting the size change direction of the future load;
the dynamic rapid adjustment and the online adjustment are realized by performing control strategy adjustment online according to the real-time position and the target position, and selecting a traversing path curve of the universal characteristic curve until reaching a target point.
Further, in the step S100, the controller is respectively connected with a pressure sensor, a rotation speed sensor, a hydraulic pump and an engine, the pressure sensor is connected with the hydraulic pump, the rotation speed sensor is connected with the engine, and the pressure sensor is used for acquiring a pressure value of an outlet of the hydraulic pump and sending the pressure value to the controller; the rotating speed sensor is used for acquiring a rotating speed signal of the engine and sending the rotating speed signal to the controller; and the controller records and stores the corresponding matching relation between the pressure value of the hydraulic pump and the rotating speed of the engine.
Further, the energy-saving control method for the engine of the engineering machinery further comprises a proportional flow valve which is respectively connected with the controller and the hydraulic pump and is used for controlling the discharge capacity of the hydraulic pump by adjusting the control current according to the instruction output by the controller so as to realize output power control.
Further, in the step S200, according to the universal characteristic curve of the engine, the target point of the optimal fuel consumption area is determined by calculation as follows: according to the universal characteristic curve of the engine, the rotating speed characteristic and the load torque characteristic of the engine are adjusted between the established path curves of the selected universal characteristic curve through an adjusting means, and the engine runs along a track leading to the optimal oil consumption area under the condition that the requirement of the load working condition is met.
Further, the target point of the optimal oil consumption area is a low oil consumption area which is adaptively maintained by the dynamic balance of the engine and the load.
Further, the step S300 of adjusting the engine speed to the optimal fuel consumption area by the control means specifically includes:
(1) finding a low oil consumption area which is self-adaptively maintained by the engine and the load dynamic balance according to the universal characteristic curve of the engine, and selecting a rotating speed value in the low oil consumption area;
(2) adjusting the engine speed to the speed value selected in the step (1);
(3) adjusting the flow rate of the hydraulic pump such that the outlet pressure of the hydraulic pump is constant relative to when the engine speed is not adjusted.
Further, the energy-saving control method for the engine of the engineering machinery further comprises a step S400 of outputting and displaying the optimal oil consumption value of the engine.
The invention provides an energy-saving control method for an engine of an engineering machine, which comprises the steps of firstly, synchronously acquiring load data and engine data at a high speed through recorded broadcasting of a controller, carrying out correlation analysis on the relation between the load data and the engine data, analyzing the control strategy and the control effect of the engine, and carrying out recorded broadcasting analysis and evaluation; secondly, determining a target point of the optimal oil consumption area through calculation according to the universal characteristic curve of the engine; finally, the engine speed and/or the current of the hydraulic pump are regulated to the optimal oil consumption area through a control means. Compared with the prior art, the energy-saving control method can visually adjust the engine control strategy while synchronously acquiring the load data and the engine data on line until the optimal universal characteristic curve path is selected to enter the optimal oil consumption area, and has the advantages of high intelligent degree, information visualization, energy conservation and emission reduction.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of an energy-saving control method for an engine of an engineering machine according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention relates to an energy-saving control method for an engine of an engineering machine, which mainly aims at the technical problems that the working state of the engine and the real-time position of a universal characteristic curve cannot be monitored in real time on line in the prior art, and the optimal path of the universal characteristic curve passing through the engine to an optimal oil consumption area cannot be regulated and controlled in view of the unadjustable characteristic of the universal characteristic curve of the engine.
Referring to fig. 1, a flowchart of an energy-saving control method for an engine of a construction machine according to an embodiment of the present invention is shown.
The invention provides an energy-saving control method for an engine of engineering machinery, which comprises the following steps:
s100, synchronously acquiring load data and engine data at a high speed through recorded broadcasting by a controller, performing correlation analysis on the relationship between the load data and the engine data, analyzing the control strategy and the control effect of the engine, and performing recorded broadcasting analysis and evaluation;
specifically, the load data and the engine data include an engine speed, a load torque, a regulated current of the hydraulic pump, and an outlet pressure; the dimension of the relationship correlation analysis between the load data and the engine data comprises definite target, behavior analysis, load prediction, dynamic quick adjustment and online adjustment, wherein:
the target is definitely expressed by confirming the target position of the optimal fuel consumption area according to the universal characteristic curve of the engine;
the behavior analysis shows that the working state of the engine and the real-time position of the universal characteristic curve are known in real time;
the load prediction is realized by predicting the size change direction of the future load;
the dynamic rapid adjustment and the online adjustment are realized by performing control strategy adjustment online according to a real-time position and a target position, and selecting a traversing path curve of all characteristic curves until a target point is reached;
step S200, determining a target point of an optimal oil consumption area through calculation according to the universal characteristic curve of the engine; preferably, the target point of the optimal oil consumption area is a low oil consumption area which is maintained by the dynamic balance self-adaption of the engine and the load;
and step S300, adjusting the rotating speed of the engine and/or the current of the hydraulic pump to an optimal oil consumption area through a control means.
Specifically, taking the adjustment of the engine speed as an example, the adjustment of the engine speed to the optimal oil consumption area through the control means is specifically represented as follows:
(1) finding a low oil consumption area which is self-adaptively maintained by the engine and the load dynamic balance according to the universal characteristic curve of the engine, and selecting a rotating speed value in the low oil consumption area;
(2) adjusting the engine speed to the speed value selected in the step (1);
(3) adjusting the flow rate of the hydraulic pump such that the outlet pressure of the hydraulic pump is constant relative to when the engine speed is not adjusted.
Through the arrangement, the energy-saving control method for the engine of the engineering machinery provided by the embodiment comprises the steps of firstly, recording and broadcasting through the controller, synchronously acquiring load data and engine data at a high speed, carrying out correlation analysis on the relationship between the load data and the engine data, analyzing the control strategy and the control effect of the engine, and carrying out recording and broadcasting analysis and evaluation; then, determining a target point of the optimal oil consumption area through calculation according to the universal characteristic curve of the engine; and finally, regulating the rotating speed of the engine and/or the current of the hydraulic pump to an optimal oil consumption area by a control means, wherein the method realizes online acquisition and visualization technical effects of synchronous analysis by recording and broadcasting through a controller, defines real-time positions and target positions according to the universal characteristic curve of the engine, can decide which curves to run along, makes control strategy adjustment, and actively adjusts to the most oil-saving strategy (namely, the engine passes through the universal characteristic curve to a low oil consumption area until reaching a target point), or else, passes through a possibly high oil consumption area according to the natural characteristic curve of the engine, and has the advantages of high intelligent degree, information visualization, energy conservation and emission reduction.
Meanwhile, it is worth mentioning that, in view of the prior art, the physical factors characterizing the characteristics such as speed, torque, etc. are not adjustable, the step S200 in the present invention is embodied as follows: according to the universal characteristic curve of the engine, the rotating speed characteristic and the load torque characteristic of the engine are adjusted between the established path curves of the selected universal characteristic curve through an adjusting means, and the engine runs along a track leading to the optimal oil consumption area under the condition that the requirement of the load working condition is met.
In a further technical scheme, the energy-saving control method for the engine of the engineering machinery further comprises a step S400 of outputting and displaying the optimal oil consumption value of the engine.
Preferably, in the invention, in step S100, the controller is respectively connected to the pressure sensor, the rotation speed sensor, the hydraulic pump and the engine, the pressure sensor is connected to the hydraulic pump, the rotation speed sensor is connected to the engine, and the pressure sensor is used for collecting a pressure value at an outlet of the hydraulic pump and sending the pressure value to the controller; the rotating speed sensor is used for acquiring a rotating speed signal of the engine and sending the rotating speed signal to the controller; and the controller records and stores the corresponding matching relation between the pressure value of the hydraulic pump and the rotating speed of the engine. It should be noted that a proportional flow valve is arranged between the controller and the hydraulic pump, and the controller and the hydraulic pump are respectively connected with the proportional flow valve and used for controlling the discharge capacity of the hydraulic pump by adjusting the control current according to the instruction output by the controller, so as to realize the output power control.
In addition, considering that a proportional flow valve is arranged between the controller and the hydraulic pump, the step S300 of controlling the engine to the optimal fuel consumption area by adjusting the current of the hydraulic pump is embodied as follows:
the absorbed power of the hydraulic pump is adjusted by adjusting the current of the hydraulic pump, and then the matching requirement of an engine is met: when the load power is large and the supply is insufficient, the opening degree of a flow valve of the proportional flow valve is reduced by controlling the current of the hydraulic pump to be reduced, so that the absorption power of the hydraulic pump is controlled to be reduced and the speed of the engine is controlled to be slow; when the load power is small and the supply is sufficient, the opening degree of a flow valve of the proportional flow valve is enlarged by controlling the current increase of the hydraulic pump, so that the absorption power increase of the hydraulic pump and the speed regulation of the engine are controlled to be rapid.
In a word, compared with the prior art, the method changes the traditional method that the data needs to be acquired on line and then analyzed off line, and then the engine is controlled to move from the high oil consumption area to the optimal oil consumption area by an adjusting strategy, can realize the technical effects of synchronization of data acquisition and calculation analysis and visual presentation, and has the advantages of high intelligent degree, information visualization, energy conservation and emission reduction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. An energy-saving control method for an engine of engineering machinery is characterized by comprising the following steps:
s100, synchronously acquiring load data and engine data at a high speed through recording and broadcasting by a controller, performing correlation analysis on the relationship between the load data and the engine data, analyzing the control strategy and the control effect of the engine, and performing recording, broadcasting, analyzing and evaluating, wherein the load data and the engine data comprise the rotating speed of the engine, the load torque, the regulating current of a hydraulic pump and the outlet pressure; the dimensionality of the relational correlation analysis between the load data and the engine data comprises target definition, behavior analysis, load prediction, dynamic rapid adjustment and online adjustment, wherein:
the target is definitely expressed by confirming the target position of the optimal fuel consumption area according to the universal characteristic curve of the engine;
the behavior analysis shows that the working state of the engine and the real-time position of the universal characteristic curve are known in real time;
the load prediction is realized by predicting the size change direction of the future load;
the dynamic rapid adjustment and the online adjustment are realized by performing control strategy adjustment online according to a real-time position and a target position, and selecting a traversing path curve of all characteristic curves until a target point is reached;
step S200, determining a target point of an optimal oil consumption area through calculation according to the universal characteristic curve of the engine;
and step S300, adjusting the rotating speed of the engine and/or the current of the hydraulic pump to an optimal oil consumption area through a control means.
2. The energy-saving control method for the engine of the engineering machinery according to claim 1, wherein in step S100, the controller is respectively connected with a pressure sensor, a rotation speed sensor, a hydraulic pump and the engine, the pressure sensor is connected with the hydraulic pump, the rotation speed sensor is connected with the engine, and the pressure sensor is used for acquiring a pressure value of an outlet of the hydraulic pump and sending the pressure value to the controller; the rotating speed sensor is used for acquiring a rotating speed signal of the engine and sending the rotating speed signal to the controller; and the controller records and stores the corresponding matching relation between the pressure value of the hydraulic pump and the rotating speed of the engine.
3. The energy-saving control method for the engine of the engineering machinery according to claim 2, further comprising a proportional flow valve respectively connected with the controller and the hydraulic pump, and used for controlling the displacement of the hydraulic pump by adjusting the control current according to the instruction output by the controller, so as to realize output power control.
4. The energy-saving control method for the engine of the engineering machine according to claim 3, wherein the step S200 is to determine the target point of the optimal fuel consumption area by calculation according to the universal characteristic curve of the engine, and specifically comprises the following steps: according to the universal characteristic curve of the engine, the rotating speed characteristic and the load torque characteristic of the engine are adjusted between the established path curves of the selected universal characteristic curve through an adjusting means, and the engine runs along a track leading to the optimal oil consumption area under the condition that the requirement of the load working condition is met.
5. The energy-saving control method for the engine of the engineering machine according to claim 4, wherein the target point of the optimal oil consumption area is a low oil consumption area where the engine and the load are dynamically balanced and adaptively maintained.
6. The energy-saving control method for the engine of the engineering machinery according to claim 5, wherein the step S300 of adjusting the engine speed to the optimal oil consumption area through the control means is characterized in that:
(1) finding a low oil consumption area which is self-adaptively maintained by the engine and the load dynamic balance according to the universal characteristic curve of the engine, and selecting a rotating speed value in the low oil consumption area;
(2) adjusting the engine speed to the speed value selected in the step (1);
(3) adjusting the flow rate of the hydraulic pump such that the outlet pressure of the hydraulic pump is constant relative to when the engine speed is not adjusted.
7. The energy-saving control method for the engine of the construction machine according to any one of claims 1 to 6, further comprising a step S400 of outputting and displaying an optimal fuel consumption value of the engine.
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| JP2010065641A (en) * | 2008-09-12 | 2010-03-25 | Yanmar Co Ltd | Working vehicle |
| CN102877966A (en) * | 2012-10-31 | 2013-01-16 | 三一重机有限公司 | Mechanical engineering control method and engineering machine |
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