CN102828834B - Engine power control method, engine power controller and control system - Google Patents
Engine power control method, engine power controller and control system Download PDFInfo
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- CN102828834B CN102828834B CN201210292214.1A CN201210292214A CN102828834B CN 102828834 B CN102828834 B CN 102828834B CN 201210292214 A CN201210292214 A CN 201210292214A CN 102828834 B CN102828834 B CN 102828834B
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Abstract
The invention discloses an engine power control method, an engine power controller and a control system. The engine power control method includes determining the target rotational speed of an engine according to signals of a knob of an accelerator and transmitting the target rotational speed to an electronic control unit ECU of the engine; acquiring current fuel jetting quantity to determine the maximum fuel jetting quantity corresponding to the target rotational speed; and regulating a corresponding current value of a proportional electromagnetic valve on the basis of the maximum fuel jetting quantity corresponding to the target rotational speed and the current fuel jetting quantity so as to control displacement of a main pump. The problem that stopping pressure is difficult to determine in a pressure stopping control mode is solved by a limit power control mode on the basis of the fuel jetting quantity, and problems of delay and excessive power caused in a stall control mode are also solved.
Description
Technical field
The present invention relates to engineering machinery field, particularly a kind of engine power control method, engine power controller and control system.
Background technique
At present, power control aspect many employings positive flow of electronic fuel injection engine controls and power limitation control.Specifically, time operating mode is low load, positive flow mode is adopted to control; Time operating mode is high capacity, invariable power mode is adopted to control.With reference to the flow chart of steps that Fig. 1, Fig. 1 are power control in correlation technique.
Meanwhile, control at positive flow or in power limitation control process, also need to increase the control for the limit absorbed power of pump.In general, the control for the limit absorbed power of pump comprises two kinds of control modes, that is, stall control mode and pressure cut-off control mode.
With reference to the flow chart of steps that Fig. 2, Fig. 2 are pressure cut-off control mode.When making to carry out power limit control in this way, there is following deficiency: pressure cut-off mode is by when main pressure signal is greater than setting value, it is even flame-out that reduction discharge of main pump prevents motor from falling speed, but each motor is different with the ability to bear of each pump, this is just present in the difficult problem how choosing main pump cutoff pressure value.
With reference to the flow chart of steps that Fig. 3, Fig. 3 are stall control mode.When making to carry out power limit control in this way, there is following deficiency: engine speed change is after fuel injection amount changes.Having certain delay the time, may there is of short duration overpower in hydraulic system.
Summary of the invention
In view of this, the present invention proposes a kind of engine power control method, engine power controller and control system, is difficult to determine and engine speed delay and superpower problem under stall control mode to solve cutoff pressure in pressure cut-off control mode.
First aspect, the invention discloses a kind of engine power control method, for engineering machinery, comprises the steps: step 1, according to grip signal determination engine target rotating speed, and described rotating speed of target is sent to engine electronic control unit ECU; Step 2, collection current fuel emitted dose, determine the maximum fuel emitted dose under rotating speed of target; Step 3, based on the maximum fuel emitted dose under described rotating speed of target and described current fuel emitted dose, align flow control or power limitation control and confirm that the proportional electromagnetic valve electric current exported adjusts, to control main pump delivery.
Further, in above-mentioned engine power control method, described step 3 is further, when described current fuel emitted dose is greater than described maximum fuel emitted dose, using the input that described current fuel emitted dose regulates as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery.
Further, in above-mentioned engine power control method, in step 3 be further, when described current fuel emitted dose is less than described maximum fuel emitted dose, the present current value that described proportional electromagnetic valve is corresponding is determined, to control main pump delivery according to described current fuel emitted dose.
Further, in above-mentioned engine power control method, described maximum fuel emitted dose is determined according to following parameter: theoretical maximum injection quantity and the emitted dose allowing stall of current gear.
Engine power control method of the present invention is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
Second aspect, the invention discloses a kind of engine power controller, comprises rotating speed of target transmitting module, parameter acquisition module and displacement control module.Wherein, rotating speed of target transmitting module is configured to according to grip signal determination engine target rotating speed, and described rotating speed of target is sent to engine electronic control unit ECU; Parameter acquisition block configuration, for gathering current fuel emitted dose, determines the maximum fuel emitted dose under rotating speed of target; Displacement control block configuration is based on the maximum fuel emitted dose under described rotating speed of target and described current fuel emitted dose, and the proportional electromagnetic valve electric current aligning flow control or power limitation control confirmation output carries out adjusting to control main pump delivery.
Further, in described engine power controller, described displacement control module is further configured to, when described current fuel emitted dose is greater than described maximum fuel emitted dose, using the input that described current fuel emitted dose regulates as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery.
Further, in described engine power controller, described displacement control module is further configured to, when described current fuel emitted dose is less than described maximum fuel emitted dose, the present current value that described proportional electromagnetic valve is corresponding is determined, to control main pump delivery according to described current fuel emitted dose.
Further, in described engine power controller, described maximum fuel emitted dose is determined according to following parameter: theoretical maximum injection quantity and the emitted dose allowing stall of current gear.
Engine power controller of the present invention is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
The third aspect, the invention also discloses a kind of engine power control system, for engineering machinery, comprises main control unit and engine electronic control unit ECU.Wherein, main control unit is configured to gather grip signal, according to described grip signal determination rotating speed of target, and, described rotating speed of target is sent; Engine electronic control unit ECU, is connected with described main control unit, is configured to receive described rotating speed of target, and according to described rotating speed of target determination maximum fuel emitted dose, and, gather real-time rotate speed and the current fuel emitted dose of motor; Further, described real-time rotate speed, current fuel emitted dose and described maximum fuel emitted dose are sent; Described main control unit is further configured to, and based on described maximum fuel emitted dose and described current fuel emitted dose, the proportional electromagnetic valve electric current aligning flow control or power limitation control confirmation output carries out adjusting to control main pump delivery.
Further, in above-mentioned engine power control system, described main control unit is further configured to: when described current fuel emitted dose is greater than described maximum fuel emitted dose, using the input that described current fuel emitted dose regulates as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery; When described current fuel emitted dose is less than described maximum fuel emitted dose, determine according to described current fuel emitted dose the present current value that described proportional electromagnetic valve is corresponding, to control main pump delivery.
Engine power control system of the present invention is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of steps that in correlation technique, power controls;
Fig. 2 is in correlation technique, the flow chart of steps of pressure cut-off control mode,
Fig. 3 is in correlation technique, the flow chart of steps of stall control mode;
Fig. 4 is the flow chart of steps of engine power control method of the present invention;
Fig. 5 is the flow chart of steps of engine power control method embodiment of the present invention;
Fig. 6 is the flow chart of steps of another embodiment of engine power control method of the present invention;
Fig. 7 is the structured flowchart of engine power controller embodiment of the present invention;
Fig. 8 is the structured flowchart of engine power control system of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
With reference to the flow chart of steps that Fig. 4, Fig. 4 are engine power control method of the present invention, as can be seen from the figure, engine power control method of the present invention comprises following three steps:
Step S1, according to grip signal determination engine target rotating speed, and rotating speed of target is sent to engine electronic control unit ECU;
Step S2, collection current fuel emitted dose and the real-time rotate speed of motor under ECU controls; Meanwhile, the maximum fuel emitted dose under rotating speed of target is determined;
Maximum fuel emitted dose under step S3, based target rotating speed and current fuel emitted dose, the present current value that resize ratio solenoid valve is corresponding, to control main pump delivery.
The present invention is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
With reference to Fig. 5.Fig. 5 is the flow chart of steps of engine power control method embodiment of the present invention, comprises the steps:
Step S1, according to grip signal determination engine target rotating speed, and rotating speed of target is sent to engine electronic control unit ECU;
Step S2, collection current fuel emitted dose, determine the maximum fuel emitted dose under rotating speed of target;
Step S3A, when current fuel emitted dose is greater than maximum fuel emitted dose, the input regulated using current fuel emitted dose as PID, the output value regulated by PID is as present current value corresponding to proportional electromagnetic valve, difference is made with maximum fuel emitted dose, passing ratio link reduces system deviation, integral element eliminates systematic steady state error, differentiation element eliminates system dynamin error, the absorbed power of pump is reduced by superpower fuel injection quantity, determine the output value that PID regulates, obtain corresponding current value, to control main pump delivery.
Here maximum spout oil mass, for motor is in the theoretical maximum spout oil mass of this gear, according to concrete model and the predetermined parameter of performance of motor.
The present embodiment is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
Further preferably, maximum spout oil mass can also be determined according to following parameter: theoretical maximum spout oil mass P and the fuel injection quantity Q allowing stall of current gear.In fact, the fuel injection quantity Q of at the uniform velocity stall is determined by the maximum spout oil mass P of current gear.Maximum spout oil mass can be P-Q.
Determine maximum spout oil mass in this way, its advantage is, be difficult to except the problem determined except solving cutoff pressure in pressure cut-off control mode, under fully can also avoiding stall control mode, engine speed postpones and superpower problem.
The power that this method may be used for excavator electronic fuel injection engine controls, and certainly, the power that also may be used for other types engineering machinery electronic fuel injection engine controls.
With reference to Fig. 6.Fig. 6 is the flow chart of steps of another embodiment of engine power control method of the present invention.
Step S1, according to grip signal determination engine target rotating speed, and rotating speed of target is sent to engine electronic control unit ECU;
Step S2, collection current fuel emitted dose, determine the maximum fuel emitted dose under rotating speed of target;
Step S3B, when current fuel emitted dose is less than maximum fuel emitted dose, according to current fuel emitted dose, align that flow control or power limitation control confirm to export
Proportional electromagnetic valve electric current adjusts, to control main pump delivery.
As above an embodiment, maximum spout oil mass is here the theoretical maximum spout oil mass of motor this gear again, according to concrete model and the predetermined parameter of performance of motor.
The present embodiment is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
Further preferably, maximum spout oil mass can also be determined according to following parameter: theoretical maximum spout oil mass P and the fuel injection quantity Q allowing stall of current gear.In fact, the fuel injection quantity Q of at the uniform velocity stall is determined by the maximum spout oil mass P of current gear.Maximum spout oil mass can be P-Q.
Determine maximum spout oil mass in this way, its advantage is, be difficult to except the problem determined except solving cutoff pressure in pressure cut-off control mode, under fully can also avoiding stall control mode, engine speed postpones and superpower problem.
The power that this method may be used for excavator electronic fuel injection engine controls, and certainly, the power that also may be used for other types engineering machinery electronic fuel injection engine controls.
To illustrate below, whole power control process will be described.
Current throttle knob is at five grades, and rotating speed of target is 1500 turns, and now theoretical maximum fuel injection amount is 75mg, allows stall to be 200 turns, allows the fuel injection quantity under stall to be decided to be 80mg.The actual fuel injection amount accepted when master controller is when being greater than 80mg, and the electric current under power limitation control is 600mA, and power limit control module will by regulating the electric current under power limitation control, thus the system of elimination the mesh power that surpasses.
With reference to Fig. 7.Fig. 7 is the structural representation of engine power controller of the present invention, comprising: rotating speed of target transmitting module 70, parameter acquisition module 71 and displacement control module 72.
Wherein, rotating speed of target transmitting module 70 is configured to, and according to grip signal determination engine target rotating speed, and rotating speed of target is sent to engine electronic control unit ECU; Parameter acquisition module 71 is configured to, and gathers current fuel emitted dose and the real-time rotate speed of motor under ECU controls, determines the maximum fuel emitted dose under rotating speed of target; Displacement control module 72 is configured to, the maximum fuel emitted dose under based target rotating speed and current fuel emitted dose, the present current value that resize ratio solenoid valve is corresponding, to control main pump delivery.
The present invention is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
Preferably, in one embodiment, displacement control module is further configured to, when current fuel emitted dose is greater than maximum fuel emitted dose, the input regulated using current fuel emitted dose as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery
Certainly, in another embodiment, displacement control module is further configured to, and when current fuel emitted dose is less than maximum fuel emitted dose, the present current value corresponding according to current fuel emitted dose determination proportional electromagnetic valve, to control main pump delivery.
Here maximum spout oil mass, for motor is in the theoretical maximum spout oil mass of this gear, according to concrete model and the predetermined parameter of performance of motor.
The present embodiment is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
Further preferably, maximum spout oil mass can also be determined according to following parameter: theoretical maximum spout oil mass P and the fuel injection quantity Q allowing stall of current gear.In fact, the fuel injection quantity Q of at the uniform velocity stall is determined by the maximum spout oil mass P of current gear.Maximum spout oil mass can be P-Q.
Determine maximum spout oil mass in this way, its advantage is, be difficult to except the problem determined except solving cutoff pressure in pressure cut-off control mode, under fully can also avoiding stall control mode, engine speed postpones and superpower problem.
The power that this controller may be used for excavator electronic fuel injection engine controls, and certainly, the power that also may be used for other types engineering machinery electronic fuel injection engine controls.
With reference to Fig. 8.Fig. 8 is the structured flowchart of engine power control system embodiment of the present invention.
The present embodiment comprises: engine electronic control unit (ECU) 81, main control unit 82, proportional electromagnetic valve 83, flow control valve 84 and main pump 85.Further, main control unit 82 is also connected with grip 80.
Wherein, main control unit 82 is configured to, and is configured to gather grip signal, according to grip signal determination rotating speed of target, and, rotating speed of target is sent.
ECU81 is connected with main control unit 82, is configured to be connected with main control unit, is configured to receiving target rotating speed, and according to rotating speed of target determination maximum fuel emitted dose, and, gather real-time rotate speed and the current fuel emitted dose of motor; Further, ECU 81 is further configured to, and based on maximum fuel emitted dose and current fuel emitted dose, the present current value that resize ratio solenoid valve is corresponding, to control main pump delivery.
Illustrated by above-described embodiment, main control unit is further configured to following two kinds of working methods:
(1) when current fuel emitted dose is greater than maximum fuel emitted dose, the input regulated using current fuel emitted dose as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery;
(2) when current fuel emitted dose is less than maximum fuel emitted dose, the present current value corresponding according to current fuel emitted dose determination proportional electromagnetic valve, to control main pump delivery.
Similar to the aforementioned embodiment, maximum spout oil mass here, for motor is in the theoretical maximum spout oil mass of this gear, according to concrete model and the predetermined parameter of performance of motor.
The present embodiment is the power limit control mode of benchmark according to fuel injection amount, solves cutoff pressure in pressure cut-off control mode and is difficult to the problem determined.
Further preferably, maximum spout oil mass can also be determined according to following parameter: theoretical maximum spout oil mass P and the fuel injection quantity Q allowing stall of current gear.In fact, the fuel injection quantity Q of at the uniform velocity stall is determined by the maximum spout oil mass P of current gear.Maximum spout oil mass can be P-Q.
Determine maximum spout oil mass in this way, its advantage is, be difficult to except the problem determined except solving cutoff pressure in pressure cut-off control mode, under fully can also avoiding stall control mode, engine speed postpones and superpower problem.
The power that native system may be used for excavator electronic fuel injection engine controls, and certainly, the power that also may be used for other types engineering machinery electronic fuel injection engine controls.
It should be noted that, in the present invention, engine power control method, engine power controller are similar with the working principle of control system, and relevant part can cross-reference.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an engine power control method, for engineering machinery, is characterized in that, comprises the steps:
Step 1, according to grip signal determination engine target rotating speed, and described rotating speed of target is sent to engine electronic control unit ECU;
Step 2, collection current fuel emitted dose, determine the maximum fuel emitted dose under rotating speed of target;
Step 3, based on the maximum fuel emitted dose under described rotating speed of target and described current fuel emitted dose, align flow control or power limitation control and confirm that the proportional electromagnetic valve electric current exported adjusts, to control main pump delivery.
2. engine power control method according to claim 1, is characterized in that,
Described step 3 is further, when described current fuel emitted dose is greater than described maximum fuel emitted dose, using the input that described current fuel emitted dose regulates as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery.
3. engine power control method according to claim 1 and 2, is characterized in that,
Be when described current fuel emitted dose is less than described maximum fuel emitted dose, determine according to described current fuel emitted dose the present current value that described proportional electromagnetic valve is corresponding, to control main pump delivery further in step 3.
4. engine power control method according to claim 3, is characterized in that,
Described maximum fuel emitted dose is determined according to following parameter: theoretical maximum injection quantity and the emitted dose allowing stall of current gear.
5. an engine power controller, for engineering machinery, is characterized in that, comprising:
Rotating speed of target transmitting module, is configured to according to grip signal determination engine target rotating speed, and described rotating speed of target is sent to engine electronic control unit ECU;
Parameter acquisition module, is configured to gather current fuel emitted dose, determines the maximum fuel emitted dose under rotating speed of target;
Displacement control module, is configured to based on the maximum fuel emitted dose under described rotating speed of target and described current fuel emitted dose, and the proportional electromagnetic valve electric current aligning flow control or power limitation control confirmation output adjusts, to control main pump delivery.
6. engine power controller according to claim 5, is characterized in that,
Described displacement control module is further configured to, when described current fuel emitted dose is greater than described maximum fuel emitted dose, using the input that described current fuel emitted dose regulates as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery.
7. the engine power controller according to claim 5 or 6, is characterized in that,
Described displacement control module is further configured to, and when described current fuel emitted dose is less than described maximum fuel emitted dose, determines according to described current fuel emitted dose the present current value that described proportional electromagnetic valve is corresponding, to control main pump delivery.
8. engine power controller according to claim 7, is characterized in that,
Described maximum fuel emitted dose is determined according to following parameter: theoretical maximum injection quantity and the emitted dose allowing stall of current gear.
9. an engine power control system, for engineering machinery, is characterized in that, comprising:
Main control unit, is configured to gather grip signal, according to described grip signal determination rotating speed of target, and, described rotating speed of target is sent;
Engine electronic control unit ECU, is connected with described main control unit, is configured to receive described rotating speed of target, and according to described rotating speed of target determination maximum fuel emitted dose, and, gather real-time rotate speed and the current fuel emitted dose of motor; Further, described real-time rotate speed, current fuel emitted dose and described maximum fuel emitted dose are sent;
Described main control unit is further configured to, and based on described maximum fuel emitted dose and described current fuel emitted dose, the proportional electromagnetic valve electric current aligning flow control or power limitation control confirmation output carries out adjusting to control main pump delivery.
10. engine power control system according to claim 9, is characterized in that,
Described main control unit is further configured to:
When described current fuel emitted dose is greater than described maximum fuel emitted dose, using the input that described current fuel emitted dose regulates as PID, the output value that PID is regulated as present current value corresponding to proportional electromagnetic valve, to control main pump delivery;
When described current fuel emitted dose is less than described maximum fuel emitted dose, determine according to described current fuel emitted dose the present current value that described proportional electromagnetic valve is corresponding, to control main pump delivery.
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| CN104141549A (en) * | 2013-05-06 | 2014-11-12 | 卡特彼勒（青州）有限公司 | Machine engine speed reduction control method |
| CN105658936B (en) * | 2013-06-14 | 2019-03-12 | 罗伯特·博世有限公司 | Engine power lifting system and method |
| JP6501396B2 (en) * | 2015-04-24 | 2019-04-17 | 株式会社やまびこ | Hand-held engine work machine |
| US10316783B2 (en) * | 2015-05-11 | 2019-06-11 | Ge Global Sourcing Llc | Fuel injector wear correction methodology |
| CN105443252B (en) * | 2015-12-18 | 2018-06-19 | 陕西航天动力高科技股份有限公司 | A kind of stepless free regulating speed diesel oil engine |
| CN109630298B (en) * | 2018-12-12 | 2021-05-07 | 三一汽车制造有限公司 | Control method and control system of power system and engineering machinery |
| CN113565746B (en) * | 2021-07-26 | 2022-08-23 | 中联重科股份有限公司 | Method, processor, device and pumping equipment for pressure switching of pumping equipment |
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