CN103670747A - Method for controlling rotation speed of diesel engine - Google Patents
Method for controlling rotation speed of diesel engine Download PDFInfo
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- CN103670747A CN103670747A CN201310697664.3A CN201310697664A CN103670747A CN 103670747 A CN103670747 A CN 103670747A CN 201310697664 A CN201310697664 A CN 201310697664A CN 103670747 A CN103670747 A CN 103670747A
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Abstract
The invention provides a method for controlling the rotation speed of a diesel engine. After the diesel engine is started, when the rotation speed of the diesel engine reaches the ignition rotation speed of 100 rounds per minute, a start DBR fuel oil limit value is output as a result of a current loop, and an actuator is controlled through PWM waves so that the rotation speed of the diesel engine can be controlled. When the rotation speed of the diesel engine reaches 700 rounds per minute, a rotation speed loop and the current loop together start to control the rotation speed. When the rotation speed of the diesel engine reaches 1500+/-10 rounds per minute, the diesel engine enters a power station work condition, and at the moment, a potentiometer is used for finely regulating the target rotation speed so as to set the final target rotation speed, and therefore the diesel engine can stably operate under the power station work condition. When the diesel engine needs to be shut down, after a controller captures fuel cut signals, the actuator quickly returns to the zero position under the spring force of the actuator, and the shutdown state can be executed. A position loop is not needed, the structure of the actuator becomes simple and reliable, cost is lower, and the controller is smaller in size and good in practicability.
Description
Technical field
What the present invention relates to is a kind of controlling method for diesel engine, specifically diesel speed control method.
Background technique
Diesel engines at present speed regulator develops into electronic speed regulator by traditional mechanical speed governor, but most of electronic speed regulator all adopts the two closed loop control methods based on rotating speed and position, and this controlling method is extensive use on power station and boat diesel engine.Although which has good control effect, but exist following not enough: owing to having introduced position ring, the point of addition sensor in final controlling element of having to, make that actuator structure is more complicated, cost is also higher, and the reliability of position transducer will directly determine that can electronic speed regulator normally work, once position transducer damages, speed regulator will lose efficacy, diesel engine speed, by out of hand, even causes serious accident; Position transducer needs extra power supply, makes speed regulator need to reserve more tenminal block, and volume is larger; Electronic speed regulator based on the two closed loops of rotating speed and position often needs pid parameter dynamically to adjust, and one group of pid parameter is difficult to meet the demand of full operating mode, makes Software for Design more complicated, and staking-out work amount is large, to user, brings inconvenience.
Summary of the invention
The object of the present invention is to provide and not only saved position transducer, make actuator structure more simple and reliable, and have a kind of diesel speed control method of good control effect.
The object of the present invention is achieved like this:
A kind of diesel speed control method of the present invention, is characterized in that:
Diesel engine, after starting, when its rotating speed reaches while catching fire 100 revs/min of rotating speeds, determines that diesel engine enters state of starting operating, the result output starting DBR fuel limit value as electric current loop, thus in the mode of PWM ripple, control the rotating speed of final controlling element control diesel engine;
When diesel engine speed is increased to 700 revs/min, der Geschwindigkeitkreis and electric current circulation start jointly to control rotating speed: first by rate of acceleration, produce rotating speed of target, wherein parameter rate of acceleration is for controlling time and the target setting rotating speed that reaches 1500 revs/min of rated speeds under the operating mode of power station, by actual speed and rotating speed of target comparison, produce rotating speed deviation, current target value using its result as electric current loop after der Geschwindigkeitkreis PID calculates, again by the final controlling element actual current value and this current target current value comparison that gather, generation current deviation, again after electric current loop PID calculates, produce final controlling element and control Output rusults, when diesel engine speed reaches 1500 ± 10 revs/min, diesel engine enters power station operating mode, now by potentiometer, finely tunes rotating speed of target and sets final goal rotating speed, thereby make diesel engine stable operation under the operating mode of power station,
When diesel engine need to be shut down, controller captures after oil-break signal, stops rotating speed and current double closed-loop the output of final controlling element is controlled, and final controlling element is got back to rapidly zero-bit under the effect of self spring force, can enter outage state.
The present invention can also comprise:
When 1, diesel engine enters state of starting operating, by rotating speed, inquire about starting DBR fuel limit value.
2, when diesel engine speed is increased to after 700 revs/min, through electric current loop PID, calculate, produce final controlling element and control Output rusults, this result can not be greater than maximum fuel DBR limits value under this rotating speed, by der Geschwindigkeitkreis and electric current loop two-stage series connection, control final controlling element injection pump rack is moved to the direction that reduces rotating speed deviation, thereby the actual speed of diesel engine is changed immediately following the variation of rotating speed of target all the time.
3, diesel engine enters after the operating mode of power station; in der Geschwindigkeitkreis and the two closed loop control processes of electric current loop; by rotating speed deviation, current deviation are amplified, process and prevent the saturated restriction of integration and overspeed protection, and the computing cycle of PID and Output rusults control cycle are all in 5 milliseconds.
Advantage of the present invention is: owing to introducing electric current loop, therefore no longer need position ring, it is simple and reliable that this not only makes that the structure of final controlling element becomes, cost is lower, and controller is also less by volume, practicability is good, simultaneously because rotating speed and electric current have good coupling, after adjusting, suitable pid parameter can adapt to the full operating mode of diesel engine, thereby make Software for Design simpler, saved the dynamic adjustment link of pid parameter, therefore, the method can improve the reliability of whole speed control system, thereby makes the more reliable and more stable work of diesel engine.
Accompanying drawing explanation
Fig. 1 is the diesel speed control theory diagram based on rotating speed and current double closed-loop;
Fig. 2 is flow chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
In conjunction with Fig. 1～2, diesel engine may operate at Ship Power Station pattern, and when diesel engine work is during in power station pattern, diesel engine is mainly divided into three kinds of operating modes, state of starting operating, power station operating mode and shut down operating mode.Diesel engine is after starting, when its rotating speed reaches while catching fire 100 revs/min of rotating speeds, determine that diesel engine enters state of starting operating, now mainly by rotating speed, inquire about starting DBR fuel limit value, and the result output as electric current loop starting DBR fuel limit value, thereby control in the mode of PWM ripple the rotating speed that final controlling element is controlled diesel engine, when diesel engine speed is increased to 700 revs/min, der Geschwindigkeitkreis and electric current circulation start jointly to control rotating speed, first there is rate of acceleration to produce rotating speed of target, wherein parameter rate of acceleration is mainly used in controlling time and the target setting rotating speed reach 1500 revs/min of rated speeds under the operating mode of power station, by actual speed and rotating speed of target comparison, produce rotating speed deviation, current target value using its result as electric current loop after der Geschwindigkeitkreis PID calculates, pass through again actual current value and this current target current value comparison of the final controlling element of collection, generation current deviation, again after electric current loop PID calculates, produce final controlling element and control Output rusults, but this result can not be greater than maximum fuel DBR limits value under this rotating speed, by der Geschwindigkeitkreis and electric current loop two-stage series connection, controlling final controlling element makes injection pump rack move to the direction that reduces rotating speed deviation, thereby the actual speed of diesel engine is changed all the time immediately following the variation of rotating speed of target, when diesel engine speed reaches (1500 ± 10) rev/min, diesel engine enters power station operating mode, now can finely tune rotating speed of target by potentiometer and carry out to set more accurately 1500 revs/min of final goal rotating speeds, thereby make diesel engine stable operation under the operating mode of power station, for preventing that sudden load change from causing diesel engine speed fluctuation excessive, in two closed loop control processes, can process and prevent the saturated restriction of integration and overspeed protection by rotating speed deviation, current deviation being carried out to appropriate amplification, and the computing cycle of PID and Output rusults control cycle all should be controlled in 5 milliseconds, improve the precision of diesel speed control and sensitivity, guarantee that diesel engine stable operation is under the operating mode of power station, when diesel engine need to be shut down, controller captures after oil-break signal, stops rotating speed and current double closed-loop the output of final controlling element is controlled, and final controlling element is got back to rapidly zero-bit under the effect of self spring force, can enter outage state.
When diesel engine enters after idling operation, can accelerate according to actual conditions, deceleration-operation, also enter operating conditions, mainly now by speed probe, to gather the tach signal of diesel engine, first will collect actual speed compares and obtains rotating speed deviation with setting rotating speed, current target value using its result as final controlling element electric current after calculating by rotating speed PID adjusting, the actual current value of the final controlling element that basis collects again and given target current value compare and obtain current deviation, through current PI D, regulate and calculate using final result as the setting value of controlling final controlling element again, by der Geschwindigkeitkreis and electric current loop two-stage series connection, controlling final controlling element makes injection pump rack move to the direction that reduces rotating speed deviation, to reduce deviation, eliminate deviation, thereby diesel engine speed is stabilized near setting value, now need equally maximum fuel DBR restriction and the restriction of hypervelocity rotating speed, to prevent diesel engine hypervelocity or driving.
Diesel speed control method of the present invention, when diesel engine is in operating conditions, in two closed loop control processes, need to, by rotating speed deviation and current deviation are carried out appropriate amplification processing and prevented the saturated restriction of integration, improve the control accuracy of diesel engine and sensitivity.If the hypervelocity of certain time detected simultaneously, will be confirmed to be hypervelocity, now will force the tooth bar positioning control of diesel engine in zero-bit, diesel engine enters shutdown operating mode, guarantees diesel engine and personal safety.
Controlling method of the present invention is mainly by speed probe, to gather the tach signal of diesel engine, first will collect actual speed compares and obtains rotating speed deviation with setting rotating speed, current target value using its result as final controlling element electric current after calculating by rotating speed PID adjusting, the actual current value of the final controlling element that basis collects again and given target current value compare and obtain current deviation, through current PI D, regulate and calculate using final result as the setting value of controlling final controlling element again, by der Geschwindigkeitkreis and electric current loop two-stage series connection, controlling final controlling element makes injection pump rack move to the direction that reduces rotating speed deviation, thereby diesel engine speed is stabilized near setting value.
By being series at the precision resistance in final controlling element output circuit, and coordinate corresponding filter amplification circuit that current signal is changed into the voltage signal that single-chip microcomputer can be identified, and introduced Current Negative Three-Point Capacitance, when actual current is not equal to the setting electric current of final controlling element, will generation current deviation, through current PI D, calculate, and using its result of calculation as the setting value of controlling final controlling element output.
By rotating speed, diesel engine condition is judged; can be divided into startup, operation, shut down three operating modes; when start operating performance, rotating speed PID does not participate in calculating; only need to calculate output by starting fuel oil DBR restriction and current PI D; when reaching operating conditions, as shown in claim 1, carry out rotating speed and current double closed-loop and control; and in full operating conditions process, there are maximum fuel DBR restriction and the restriction of hypervelocity rotating speed, prevent diesel engine hypervelocity or driving.
In two closed loop control processes, by rotating speed deviation and current deviation are carried out appropriate amplification processing and prevented the saturated restriction of integration, improve the control accuracy of diesel engine and sensitivity.
Claims (4)
1. a diesel speed control method, is characterized in that:
Diesel engine, after starting, when its rotating speed reaches while catching fire 100 revs/min of rotating speeds, determines that diesel engine enters state of starting operating, the result output starting DBR fuel limit value as electric current loop, thus in the mode of PWM ripple, control the rotating speed of final controlling element control diesel engine;
When diesel engine speed is increased to 700 revs/min, der Geschwindigkeitkreis and electric current circulation start jointly to control rotating speed: first by rate of acceleration, produce rotating speed of target, wherein parameter rate of acceleration is for controlling time and the target setting rotating speed that reaches 1500 revs/min of rated speeds under the operating mode of power station, by actual speed and rotating speed of target comparison, produce rotating speed deviation, current target value using its result as electric current loop after der Geschwindigkeitkreis PID calculates, again by the final controlling element actual current value and this current target current value comparison that gather, generation current deviation, again after electric current loop PID calculates, produce final controlling element and control Output rusults, when diesel engine speed reaches 1500 ± 10 revs/min, diesel engine enters power station operating mode, now by potentiometer, finely tunes rotating speed of target and sets final goal rotating speed, thereby make diesel engine stable operation under the operating mode of power station,
When diesel engine need to be shut down, controller captures after oil-break signal, stops rotating speed and current double closed-loop the output of final controlling element is controlled, and final controlling element is got back to rapidly zero-bit under the effect of self spring force, can enter outage state.
2. a kind of diesel speed control method according to claim 1, is characterized in that: when diesel engine enters state of starting operating, by rotating speed, inquire about starting DBR fuel limit value.
3. a kind of diesel speed control method according to claim 1, it is characterized in that: when diesel engine speed is increased to after 700 revs/min, through electric current loop PID, calculate, produce final controlling element and control Output rusults, this result can not be greater than maximum fuel DBR limits value under this rotating speed, by der Geschwindigkeitkreis and electric current loop two-stage series connection, control final controlling element injection pump rack is moved to the direction that reduces rotating speed deviation, thereby the actual speed of diesel engine is changed immediately following the variation of rotating speed of target all the time.
4. a kind of diesel speed control method according to claim 1; it is characterized in that: diesel engine enters after the operating mode of power station; in der Geschwindigkeitkreis and the two closed loop control processes of electric current loop; by rotating speed deviation, current deviation are amplified, process and prevent the saturated restriction of integration and overspeed protection, and the computing cycle of PID and Output rusults control cycle are all in 5 milliseconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697664.3A CN103670747A (en) | 2013-12-18 | 2013-12-18 | Method for controlling rotation speed of diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310697664.3A CN103670747A (en) | 2013-12-18 | 2013-12-18 | Method for controlling rotation speed of diesel engine |
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| CN103670747A true CN103670747A (en) | 2014-03-26 |
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| CN201310697664.3A Pending CN103670747A (en) | 2013-12-18 | 2013-12-18 | Method for controlling rotation speed of diesel engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481717A (en) * | 2014-12-05 | 2015-04-01 | 中国航空工业集团公司第六三一研究所 | Engine speed control method with online setting of PID (proportion integration differentiation) parameters |
| CN105888864A (en) * | 2016-05-25 | 2016-08-24 | 海华电子企业(中国)有限公司 | Automatic electronic speed regulating device and method for high pressure common rail diesel engine |
| CN112761802A (en) * | 2021-02-23 | 2021-05-07 | 上海柴油机股份有限公司 | Speed regulating method for diesel engine |
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| JP2001271658A (en) * | 2000-03-29 | 2001-10-05 | Toho Seisakusho:Kk | Electronic governor for diesel engine |
| CN200941159Y (en) * | 2006-08-11 | 2007-08-29 | 中国重型汽车集团有限公司 | Electronic governing control system |
| CN201696147U (en) * | 2010-06-08 | 2011-01-05 | 郑州金阳电气有限公司 | Electronic speed regulator for diesel generator set |
-
2013
- 2013-12-18 CN CN201310697664.3A patent/CN103670747A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001271658A (en) * | 2000-03-29 | 2001-10-05 | Toho Seisakusho:Kk | Electronic governor for diesel engine |
| CN200941159Y (en) * | 2006-08-11 | 2007-08-29 | 中国重型汽车集团有限公司 | Electronic governing control system |
| CN201696147U (en) * | 2010-06-08 | 2011-01-05 | 郑州金阳电气有限公司 | Electronic speed regulator for diesel generator set |
Non-Patent Citations (1)
| Title |
|---|
| 吴富民: "柴油机数字式电子调速器的设计与开发研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, no. 06, 15 June 2011 (2011-06-15) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481717A (en) * | 2014-12-05 | 2015-04-01 | 中国航空工业集团公司第六三一研究所 | Engine speed control method with online setting of PID (proportion integration differentiation) parameters |
| CN104481717B (en) * | 2014-12-05 | 2017-01-18 | 中国航空工业集团公司第六三一研究所 | Engine speed control method with online setting of PID (proportion integration differentiation) parameters |
| CN105888864A (en) * | 2016-05-25 | 2016-08-24 | 海华电子企业(中国)有限公司 | Automatic electronic speed regulating device and method for high pressure common rail diesel engine |
| CN112761802A (en) * | 2021-02-23 | 2021-05-07 | 上海柴油机股份有限公司 | Speed regulating method for diesel engine |
| CN112761802B (en) * | 2021-02-23 | 2023-02-17 | 上海新动力汽车科技股份有限公司 | Sudden unloading speed regulating method for diesel engine |
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Application publication date: 20140326 |