CN110685810B - Method for load limiting function of diesel engine - Google Patents
Method for load limiting function of diesel engine Download PDFInfo
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- CN110685810B CN110685810B CN201910890577.7A CN201910890577A CN110685810B CN 110685810 B CN110685810 B CN 110685810B CN 201910890577 A CN201910890577 A CN 201910890577A CN 110685810 B CN110685810 B CN 110685810B
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- displacement
- dipstick
- load
- rotating speed
- diesel engine
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
- F02D41/0205—Circuit arrangements for generating control signals using an auxiliary engine speed control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
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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
- F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
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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
- F02D2200/101—Engine speed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a method for limiting the load function of a diesel engine, which comprises the following steps: s1: a load-limiting electromagnetic valve is additionally arranged on a pipeline for connecting the diesel engine and the oil cylinder, a dipstick displacement sensor is arranged in the load-limiting electromagnetic valve, a speed sensor and the load-limiting electromagnetic valve which are arranged on an impeller rotating in the diesel engine are controlled by a controller and are connected with a detector with a display screen outside and a monitor for detecting data, and the rotating speed point of the impeller of each diesel engine corresponds to an upper limit of the displacement of the dipstick; each rotating speed point corresponds to an upper limit of displacement of the oil dipstick, the shortage of a pure algorithm is overcome by a control method combining planning scheduling and algorithm scheduling, the load limiting electromagnetic valve can work after the upper limit corresponding to the rotating speed point is reached, when the actual displacement of the oil dipstick is larger than the upper limit of the displacement of the oil dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicating lamp and the buzzer work, and the load limiting electromagnetic valve cannot be electrified all the time.
Description
Technical Field
The invention relates to the technical field of diesel engine load functions, in particular to a method for limiting the load function of a diesel engine.
Background
When the diesel engine is started or the load is overlarge, the speed regulator can drive the rocker arm to act according to mechanical characteristics in order to meet the requirement of the rotating speed of the diesel engine, and before the actual rotating speed is lower than the set rotating speed, the oil dipstick is controlled to increase the displacement of the oil dipstick all the time, so that the oil supply amount is increased all the time, and poor emission can be caused.
The load limiting electromagnetic valve is configured, when the diesel engine is lower than a set rotating speed, the load limiting electromagnetic valve is electrified to work, so that the displacement of the oil dipstick is not higher than the upper limit, when the diesel engine is lower than the set rotating speed for a long time, the load limiting electromagnetic valve works all the time, the service life of the electromagnetic valve can be influenced, and meanwhile, the load limiting indicating lamp and the buzzer can work to influence the work of operators.
Disclosure of Invention
In order to solve the problems, each rotating speed point corresponds to an upper limit of displacement of the dipstick, the load limiting electromagnetic valve can work after the upper limit corresponding to the rotating speed point is reached, when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicating lamp and the buzzer work, the load limiting electromagnetic valve cannot be electrified all the time, and the service life of the electromagnetic valve is prolonged; when the rotating speed is between the operating rotating speed and the set rotating speed, the overload alarming function is realized,
to this end, according to one aspect of the present invention, there is provided a method for a load limiting function of a diesel engine, comprising the steps of:
s1: a load-limiting electromagnetic valve is additionally arranged on a pipeline for connecting the diesel engine and the oil cylinder, a dipstick displacement sensor is arranged in the load-limiting electromagnetic valve, a speed sensor and the load-limiting electromagnetic valve which are arranged on an impeller rotating in the diesel engine are controlled by a controller and are connected with a detector with a display screen outside and a monitor for detecting data, and the rotating speed point of the impeller of each diesel engine corresponds to an upper limit of the displacement of the dipstick;
s2: during bench test, the recording array displays parameters of rotating speed-displacement of the oil dipstick on a display screen after analog-to-digital conversion in a detector according to analog signals measured by a speed measuring sensor and an oil dipstick displacement sensor, records the parameters of the rotating speed and the displacement of the oil dipstick in real time, sets the parameters of the upper limit of the rotating speed-displacement of the oil dipstick according to the parameters, and selects four groups of data to input into a monitor;
s3: the monitor calculates the linear relation of the rotation speed and the displacement upper limit of the dipstick according to the four groups of data input in the step S2, and determines the displacement upper limit of the dipstick corresponding to each input rotation speed data when the rotation speed is lower than the set rotation speed;
s4: when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicator light and the buzzer work;
s5: the triggering conditions of the planning conditions and the algorithm conditions include, but are not limited to, time, rotation speed, current, temperature and other related variables, and also include combination conditions, and the planning conditions are prioritized over the algorithm conditions as long as a triggering process meeting the planning conditions occurs.
In some embodiments, for the "rotation speed-dipstick displacement" parameter in step S2: the rotating speed and the actual parameters under the maximum load at the current rotating speed.
In some embodiments, a representative "speed-dipstick displacement upper limit" parameter is selected for step S2.
In some embodiments, for the "rotation speed-dipstick displacement upper limit" parameter in step S3: and (4) alarming parameters caused by overlarge displacement of the dipstick at the rotating speed and the current rotating speed.
In some embodiments, the control of the planning condition includes an oil suction process, an oil injection process, a speed measurement process, and a rotation process in step S5.
Compared with the prior art, the invention has the beneficial effects that: according to the method for limiting the load of the diesel engine, each rotating speed point corresponds to an upper limit of displacement of the dipstick, the defect of pure algorithm is overcome by a control method combining planning scheduling and algorithm scheduling, on the basis of the original algorithm, the increase of planning conditions is manually set in advance to overcome the defect of algorithm scheduling, when the upper limit corresponding to the rotating speed point is reached, the load limiting electromagnetic valve can work, when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, a load limiting indicator lamp and a buzzer work, the load limiting electromagnetic valve cannot be electrified all the time, and the service life of the electromagnetic valve is prolonged; when the rotating speed is between the operating rotating speed and the set rotating speed, the overload alarming function is achieved.
Drawings
Fig. 1 is a flowchart of a method for limiting the load of a diesel engine according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 schematically shows a flow chart of a method for limiting the load of a diesel engine according to the present invention, and as shown in fig. 1, the present embodiment comprises the following steps:
s1: the load-limiting electromagnetic valve is additionally arranged on a pipeline connected with the diesel engine and the oil cylinder, a dipstick displacement sensor is arranged in the load-limiting electromagnetic valve, the dipstick displacement data detected by the dipstick displacement sensor can control the on-off state of the load-limiting electromagnetic valve, a speed sensor and the load-limiting electromagnetic valve which are arranged on an impeller rotating in the diesel engine are controlled by a controller and are connected with a detector with an external display screen and a monitor for detecting data, the rotating speed point of the impeller of each diesel engine corresponds to an upper limit of the dipstick displacement, the speed sensor is a specially customized speed sensor, the sensor has two orthogonal measuring signal outputs and can simultaneously measure the speeds in two directions, the moving direction of a measured object can be detected, and the sensor is fixed on a stable bracket, so that the rotating angle and the speed of the measured object can be measured;
s2: when the bench test is carried out, the recording array displays the parameters of rotating speed-oil gauge displacement and the parameters of rotating speed-oil gauge displacement on a display screen after analog-to-digital conversion in the detector according to analog signals measured by the speed measuring sensor and the oil gauge displacement sensor: actual parameters of the rotating speed and the maximum load at the current rotating speed are recorded in real time, parameters of rotating speed-displacement upper limit of the oil dipstick are set according to the parameters, four groups of data are selected to be input into a monitor, and representative parameters of rotating speed-displacement upper limit of the oil dipstick, 3000r/min, 3500r/min, 4000r/min and 4500r/min are selected;
s3: the monitor calculates the linear relation of the rotating speed and the upper limit of displacement of the dipstick according to the data of 3000r/min, 3500r/min, 4000r/min and 4500r/min input in the step S2, and the parameter of the rotating speed and the upper limit of displacement of the dipstick is: the method comprises the steps that a parameter for alarming the large displacement of the dipstick at the rotating speed and the current rotating speed determines the upper limit of the displacement of the dipstick corresponding to each input rotating speed data when the rotating speed is lower than a set rotating speed, and the rotating speed interval in which a load-limiting electromagnetic valve can work is between the operating rotating speed and the set rotating speed;
s4: when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicator light and the buzzer work;
s5: the triggering conditions of the plan condition and the algorithm condition include but are not limited to time, rotating speed, current, temperature and other related variables, and also include a combination condition, as long as a triggering process meeting the plan condition occurs, the plan condition takes precedence over the algorithm condition, and the control of the plan condition comprises an oil suction process, an oil injection process, a speed measurement process and a rotation process.
Each rotating speed point corresponds to an upper limit of displacement of the dipstick, the shortage of a pure algorithm is made up by a control method combining planning scheduling and algorithm scheduling, on the basis of the original algorithm, a planning condition is increased and manually set in advance to make up the defect of algorithm scheduling, when the upper limit corresponding to the rotating speed point is reached, the load-limiting electromagnetic valve can work, when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load-limiting electromagnetic valve works, and meanwhile, the load-limiting indicator light and the buzzer work, the load-limiting electromagnetic valve cannot be electrified all the time, and the service life of the electromagnetic valve is prolonged; when the rotating speed is between the operating rotating speed and the set rotating speed, the overload alarming function is achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. A method for limiting the load function of a diesel engine is characterized by comprising the following steps:
s1: a load-limiting electromagnetic valve is additionally arranged on a pipeline for connecting the diesel engine and the oil cylinder, a dipstick displacement sensor is arranged in the load-limiting electromagnetic valve, a speed sensor and the load-limiting electromagnetic valve which are arranged on an impeller rotating in the diesel engine are controlled by a controller and are connected with a detector with a display screen outside and a monitor for detecting data, and the rotating speed point of the impeller of each diesel engine corresponds to an upper limit of the displacement of the dipstick;
s2: during bench test, the recording array displays parameters of rotating speed-displacement of the oil dipstick on a display screen after analog-to-digital conversion in a detector according to analog signals measured by a speed measuring sensor and an oil dipstick displacement sensor, records the parameters of the rotating speed and the displacement of the oil dipstick in real time, sets the parameters of the upper limit of the rotating speed-displacement of the oil dipstick according to the parameters, and selects four groups of data to input into a monitor;
s3: the monitor calculates the linear relation of the rotation speed and the displacement upper limit of the dipstick according to the four groups of data input in the step S2, and determines the displacement upper limit of the dipstick corresponding to each input rotation speed data when the rotation speed is lower than the set rotation speed;
s4: when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicator light and the buzzer work;
s5: the triggering conditions of the planning conditions and the algorithm conditions include, but are not limited to, time, rotation speed, current, temperature and other related variables, and also include combination conditions, and the planning conditions are prioritized over the algorithm conditions as long as a triggering process meeting the planning conditions occurs.
2. The method for limiting the load of the diesel engine according to claim 1, wherein in step S2, for the "rotation speed-dipstick displacement" parameter: the rotating speed and the actual parameters under the maximum load at the current rotating speed.
3. The method for load limiting function of diesel engine according to claim 1, wherein a representative "rpm-dipstick displacement upper limit" parameter is selected in step S2.
4. The method for load limiting function of diesel engine according to claim 1, wherein for the "rotation speed-dipstick displacement upper limit" parameter in step S3: and (4) alarming parameters caused by overlarge displacement of the dipstick at the rotating speed and the current rotating speed.
5. The method of claim 1, wherein the control of the planning conditions in step S5 includes an oil absorption process, an oil injection process, a speed measurement process, and a rotation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890577.7A CN110685810B (en) | 2019-09-20 | 2019-09-20 | Method for load limiting function of diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890577.7A CN110685810B (en) | 2019-09-20 | 2019-09-20 | Method for load limiting function of diesel engine |
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| Publication Number | Publication Date |
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| CN110685810A CN110685810A (en) | 2020-01-14 |
| CN110685810B true CN110685810B (en) | 2022-03-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55156219A (en) * | 1979-05-25 | 1980-12-05 | Komatsu Ltd | Black smoke preventive device for diesel engine |
| JPS57186031A (en) * | 1981-05-11 | 1982-11-16 | Komatsu Ltd | Black smoke preventive device of diesel engine |
| JPH06330784A (en) * | 1994-02-23 | 1994-11-29 | Komatsu Ltd | Electronic fuel injection control method for diesel engine |
| CN201972785U (en) * | 2010-10-27 | 2011-09-14 | 江苏大学 | Oil limiter with oil quantity correction for single cylinder diesel |
| CN102562322A (en) * | 2012-03-08 | 2012-07-11 | 江苏大学 | Oil limit device with cranking enrichment, dismounting-preventing and adjustment-preventing functions for diesel engine |
| CN103837347A (en) * | 2012-11-22 | 2014-06-04 | 中国舰船研究设计中心 | Method for calibrating load limit curve of ship propulsion diesel engine under real-ship state |
-
2019
- 2019-09-20 CN CN201910890577.7A patent/CN110685810B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55156219A (en) * | 1979-05-25 | 1980-12-05 | Komatsu Ltd | Black smoke preventive device for diesel engine |
| JPS57186031A (en) * | 1981-05-11 | 1982-11-16 | Komatsu Ltd | Black smoke preventive device of diesel engine |
| JPH06330784A (en) * | 1994-02-23 | 1994-11-29 | Komatsu Ltd | Electronic fuel injection control method for diesel engine |
| CN201972785U (en) * | 2010-10-27 | 2011-09-14 | 江苏大学 | Oil limiter with oil quantity correction for single cylinder diesel |
| CN102562322A (en) * | 2012-03-08 | 2012-07-11 | 江苏大学 | Oil limit device with cranking enrichment, dismounting-preventing and adjustment-preventing functions for diesel engine |
| CN103837347A (en) * | 2012-11-22 | 2014-06-04 | 中国舰船研究设计中心 | Method for calibrating load limit curve of ship propulsion diesel engine under real-ship state |
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| CN110685810A (en) | 2020-01-14 |
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