CN1088502C - Method and device for controlling runaway of diesel engine - Google Patents
Method and device for controlling runaway of diesel engine Download PDFInfo
- Publication number
- CN1088502C CN1088502C CN98114202A CN98114202A CN1088502C CN 1088502 C CN1088502 C CN 1088502C CN 98114202 A CN98114202 A CN 98114202A CN 98114202 A CN98114202 A CN 98114202A CN 1088502 C CN1088502 C CN 1088502C
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- China
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- diesel engine
- speed
- runaway
- damping device
- forced stoppage
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- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The present invention relates to a method and a device for controlling the runaway of a diesel engine. The device composed of a microprocessor, a speed sensor, a speed regulation state sensor, a control electromagnetic valve of a forced stoppage device and a control switch of a damping device is used for detecting the rotary speed and the speed regulation state of the diesel engine. When the rotary speed acceleration dn/dt of the diesel engine is continuously larger than zero for a set time t0, and a differential value of the actual rotary speed n and the ideal stabilized speed n0 is larger than a set value delta n2, the forced stoppage device and/or the damping device start to work. The present invention timely and effectively avoids the destructive results caused by the runaway phenomenon, and realizes the automatic program control.
Description
The invention belongs to the Diesel Engine Control technical field, relate in particular to a kind of new runaway of diesel engine controlling method and device thereof.
Diesel engine is in when work, can be because faults such as speed regulator fault, injection pump rack are stuck, unexpected unloading cause the unrestricted driving phenomenon that rises of rotating speed, and this driving phenomenon can cause destructive accident.Particularly behind the diesel engine generation driving of internal combustion locomotive,, will cause diesel engine to scrap badly damaged with main generator, exciter, starter-generator, traction motor blower if can not prevent the acceleration of diesel engine speed to rise as early as possible.Both at home and abroad to how preventing that Runaway of Diesel Engine from having done a large amount of research, but its controlling method all is confined to make the work of forced stoppage device when diesel engine speed during above a certain the highest qualification rotating speed.These methods in fact all are that the method with overspeed protection prevents that Runaway of Diesel Engine from bringing destructive consequence.In order not influence the proper functioning of diesel engine, this highest qualification rotating speed is generally all stipulated very highly.So in case driving takes place, the forced stoppage device can only just be started working when diesel engine speed has reached this very high qualification rotating speed, the forced stoppage device respond during this period of time in, diesel engine speed can continue to rise.In this case, overcome its huge rotator inertia, it is shut down rapidly is very difficult.Therefore, the runaway method of prior art can not really prevent damaging property of driving consequence effectively.
Purpose of the present invention will overcome the deficiency of above-mentioned prior art exactly, and a kind of new the runaway of diesel engine controlling method and device thereof that can start forced stoppage device and/or damping device immediately when improper continuous quicken of diesel engine, be fit to control automatically is provided.
The object of the present invention is achieved like this: a kind of runaway of diesel engine controlling method is characterized in that taking the following step:
1) at every turn to behind the diesel engine speed regulation, obtains the current ideal stability rotation speed n of diesel engine
0
2) detect the diesel engine actual speed n, when actual speed n and ideal stability rotation speed n
0
Difference is greater than setting value Δ n
1The time, the acceleration dn/dt of calculating diesel engine speed;
3) reach a set time t when acceleration dn/dt is lasting greater than zero
0, and actual the commentaries on classics
Speed n and ideal stability rotation speed n
0Difference greater than setting value Δ n
2The time, make pressure
Arresting gear and/or damping device are started working.
Realize the runaway of diesel engine control gear of said method; comprise forced stoppage device control electromagnetic valve and damping device electrically switchable grating; it is characterized in that the diesel engine speed sensor and the speed governing state sensor that also are provided with microprocessing unit and are connected with its input end 3,4,5,6 respectively, the output terminal 7,8,9 of microprocessing unit is connected with the damping device control switch with forced stoppage device control electromagnetic valve respectively.
Adopt runaway controlling method of the present invention and device thereof, owing to be continuously diesel engine actual speed and acceleration thereof to be monitored, when detecting diesel engine when improper continuous hastening phenomenon is arranged, just assert driving has taken place, start forced stoppage device and/or damping device immediately, thereby can prevent the destructive consequence that the driving phenomenon causes in time, effectively; Control the microprocessor technology owing to adopt, thereby realized procedure auto-control.
Accompanying drawing 1 is the control gear principle schematic of the embodiment of the invention.
Accompanying drawing 2 is controlling method program flow diagrams of the embodiment of the invention.
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
Referring to Fig. 1, the runaway of diesel engine control gear of present embodiment, microprocessor adopts the 8031CPU single-chip microcomputer, the diesel engine speed sensor is connected with the input end 3,4 of single-chip microcomputer, two output terminals of stepless speed regulation driver are connected with 6 with the input end 5 of single-chip microcomputer respectively, and the supply terminals 1 and 2 of single-chip microcomputer connects the positive-negative power of 110V respectively.Solenoid valve AV, BV, the CV of three control back suction fuel oil type forced stoppage devices are connected with the output terminal 8 of single-chip microcomputer.Electromagnetic contactor ZF1,2 from the load damping device is connected with the output terminal 7 of single-chip microcomputer.Exciter excitation contactor LLC is connected with the output terminal 9 of single-chip microcomputer, and excitation contactor is connected with the output terminal 9 of single-chip microcomputer by contact ZF.The output terminal 10 of single-chip microcomputer meets driving alarm BP.
Referring to Fig. 2, control program is realized initialization by frame 1, enters decision block 2 then, detects diesel engine speed whether less than 400r/min: if just enter decision block 3; If not, then enter decision block 3.1.At decision block 3, detect diesel engine and whether be in the speed governing state: if then enter frame 5; If not, then enter decision block 4.At decision block 4, detect diesel engine speed whether greater than 600r/min: if, just enter frame 11, diesel engine is shut down and/or damping device is started working, enter frame 12 then, EOP end of program; If not, then enter frame 5.At frame 5, ask current ideal stability rotation speed n
0, enter decision block 6 then, detect speed control switch and whether be in the speed governing state: if just return frame 5; If not, then enter decision block 7.At decision block 7, see current rotation speed n and n
0Difference whether greater than Δ n
1(Δ n for example
1Value is 20r/min): if just enter decision block 8; If not, then return frame 7.At decision block 8,, see that whether dn/dt is greater than zero: if just enter decision block 9 to the diesel engine speed differentiate; If not, then return frame 7.Detect at certain hour t at decision block 9
0In (t for example
0Value is 1 second) whether dn/dt continue greater than zero: if just enter decision block 10; If not, then return frame 7.Detect current rotation speed n at decision block 10, see n and n
0Difference whether greater than Δ n
2(Δ n for example
2Value is 100r/min): if, just enter frame 11, diesel engine shutdown and/or damping device are started working, enter frame 12 then, EOP end of program; If not, then return frame 7.Detect diesel engine speeds whether greater than 1200r/min at decision block 3.1: if just enter frame 11; If not, then enter frame 5.
Claims (2)
1, a kind of runaway of diesel engine controlling method is characterized in that taking the following step:
1) at every turn to behind the diesel engine speed regulation, obtains the current ideal stability rotation speed n of diesel engine
0
2) detect the diesel engine actual speed n, when actual speed n and ideal stability rotation speed n
0Difference greater than setting value Δ n
1The time, the acceleration dn/dt of calculating diesel engine speed;
3) reach a set time t when acceleration dn/dt is lasting greater than zero
0, and actual speed n and ideal stability rotation speed n
0Difference greater than setting value Δ n
2The time, forced stoppage device and/or damping device are started working.
2, a kind of runaway of diesel engine control gear of realizing the described method of claim 1; comprise forced stoppage device control electromagnetic valve (AV, BV, CV) and damping device electrically switchable grating (ZF); it is characterized in that the diesel engine speed sensor and the speed governing state sensor that also are provided with microprocessing unit CPU and are connected with its input end 3,4,5,6 respectively, the output terminal 7,8,9 of microprocessing unit is connected with damping device control switch (ZF) with forced stoppage device control electromagnetic valve (AV, BV, CV) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98114202A CN1088502C (en) | 1998-07-29 | 1998-07-29 | Method and device for controlling runaway of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98114202A CN1088502C (en) | 1998-07-29 | 1998-07-29 | Method and device for controlling runaway of diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1210202A CN1210202A (en) | 1999-03-10 |
| CN1088502C true CN1088502C (en) | 2002-07-31 |
Family
ID=5223877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98114202A Expired - Fee Related CN1088502C (en) | 1998-07-29 | 1998-07-29 | Method and device for controlling runaway of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1088502C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588133B (en) * | 2012-03-22 | 2014-07-30 | 潍柴动力股份有限公司 | Control method and control system for runaway of diesel engine |
| WO2015168953A1 (en) * | 2014-05-05 | 2015-11-12 | 裘尧云 | Diesel engine capable of preventing propeller racing |
| CN103967608B (en) * | 2014-05-05 | 2016-08-24 | 奉化市远东深海采矿技术研究所 | Prevent the electromagnetic eddy speed-limiting damping device of engine mounted longitudinally racing accident |
| CN105422298A (en) * | 2015-12-30 | 2016-03-23 | 广西玉柴机器股份有限公司 | Emergency stop control method for engine |
| CN110686901B (en) * | 2019-09-29 | 2021-06-22 | 潍柴动力股份有限公司 | Control method and device for engine pilot injection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4387679A (en) * | 1980-09-05 | 1983-06-14 | General Electric Company | Overspeed protective system for internal combustion engines |
-
1998
- 1998-07-29 CN CN98114202A patent/CN1088502C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4387679A (en) * | 1980-09-05 | 1983-06-14 | General Electric Company | Overspeed protective system for internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1210202A (en) | 1999-03-10 |
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