CN111425312A - Engine protection device - Google Patents
Engine protection device Download PDFInfo
- Publication number
- CN111425312A CN111425312A CN201910917000.0A CN201910917000A CN111425312A CN 111425312 A CN111425312 A CN 111425312A CN 201910917000 A CN201910917000 A CN 201910917000A CN 111425312 A CN111425312 A CN 111425312A
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- Prior art keywords
- engine
- fuel
- speed
- protection device
- detector
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
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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
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
- F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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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
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
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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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine protection device which comprises a first detector for detecting the rotating speed of an engine in real time, a second detector for detecting the oil pressure of fuel in real time, a fuel cut-off electromagnetic valve and a controller, wherein the controller is connected with the first detector, the second detector and the fuel cut-off electromagnetic valve and controls the fuel cut-off electromagnetic valve to cut off the supply of fuel to shut off the engine when the rotating speed of the engine is higher than a first preset rotating speed and the oil pressure of the fuel is lower than a preset pressure and when the rotating speed of the engine is higher than a second preset rotating speed, and the second preset rotating speed is higher than the first preset rotating speed. The engine protection device can control the engine to flameout in time when the fuel oil pressure of the engine is insufficient and the rotating speed of the engine is out of control, and guarantees the safety of vehicles and people.
Description
Technical Field
The invention relates to the technical field of safety detection, in particular to an engine protection device.
Background
The engine is the core device of mine transportation equipment vehicles and various engineering equipment. After the engine is started, the engine starts to run at idle or high speed.
However, if the oil pressure of the engine fuel is insufficient, poor lubrication of the engine is caused, and the continuous operation of the engine can cause serious faults such as cylinder sticking, tile sticking and the like, so that serious economic loss of the engine is caused. In addition, during the operation of the engine, the engine runaway fault may occur, that is, the rotation speed of the engine is suddenly increased due to the loss of control, the engine is out of control due to the exceeding of the maximum allowable rotation speed, and the engine is subjected to serious loss due to the long-term overspeed operation with great noise, and the personal safety is damaged.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides an engine protection device which can control the engine to be flamed out in time when the fuel oil pressure of the engine is insufficient and the rotating speed of the engine is out of control, so that the safety of vehicles and people is guaranteed.
An engine protection apparatus according to an embodiment of the present invention includes: the fuel cut-off control system comprises a first detector for detecting the rotating speed of an engine in real time, a second detector for detecting the oil pressure of fuel in real time, a fuel cut-off electromagnetic valve and a controller, wherein the controller is connected with the first detector, the second detector and the fuel cut-off electromagnetic valve and controls the fuel cut-off electromagnetic valve to cut off fuel supply to shut off the engine when the rotating speed of the engine is higher than a first preset rotating speed and the oil pressure of the fuel is lower than preset pressure and the rotating speed of the engine is higher than a second preset rotating speed, and the second preset rotating speed is larger than the first preset rotating speed.
According to the engine protection device provided by the embodiment of the invention, when the engine speed is higher than the first preset speed and the fuel oil pressure is lower than the preset pressure and the engine speed is higher than the second preset speed, the controller controls the fuel oil cut-off electromagnetic valve to be powered off, the valve of the fuel oil cut-off electromagnetic valve is closed, the fuel oil is not supplied to the engine any more, namely, the fuel oil supply is cut off, so that the engine is shut down, and the personal safety and the vehicle safety are guaranteed.
In some embodiments, the engine protection device further comprises a relay connected to the controller, and the fuel cut-off solenoid valve is connected to a normally closed contact of the relay.
In some embodiments, the first detector is a speed sensor and the second detector is an oil pressure switch.
In some embodiments, the engine protection device further comprises an alarm connected to the controller, wherein the alarm gives an alarm when the engine speed is higher than a first preset speed and the fuel oil pressure is less than a predetermined pressure and when the engine speed is higher than a maximum preset speed.
In some embodiments, the alarm is a buzzer, vibrator, or flashing light.
In some embodiments, the engine protection device further comprises a display for displaying the engine speed and the fuel pressure in real time.
In some embodiments, the engine is a K38 engine, the first predetermined speed is 300 rpm, and the second predetermined speed is 2450 rpm.
In some embodiments, the engine protection device further comprises an accumulator that powers the engine after the engine is shut down.
In some embodiments, the controller is an 80C51 single chip microcomputer.
Drawings
FIG. 1 is a schematic illustration of an engine protection device according to an embodiment of the present invention.
Fig. 2 is a structural view of an engine protection apparatus according to an embodiment of the present invention.
Reference numerals:
the fuel cut-off control system comprises a first detector 1, a second detector 2, a fuel cut-off electromagnetic valve 3, a controller 4, a relay 5, an alarm 6 and a display 7.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
As shown in fig. 1 and 2, the engine protection apparatus according to the embodiment of the present invention includes a first detector 1, a second detector 2, a fuel cut solenoid valve 3, and a controller 4.
The first detector 1 detects the engine speed in real time. In other words, the real-time rotational speed of the engine can be obtained by the first detector 1.
The second detector 2 detects the fuel oil pressure in real time. In other words, the real-time oil pressure of the fuel of the engine can be obtained by the second detector 2.
When the fuel cut-off electromagnetic valve 3 is electrified, the valve is opened to normally feed fuel to the engine, namely, fuel supply is realized, so that the engine normally works. When the fuel cut-off electromagnetic valve 3 is powered off, the valve is closed, and the normal fuel supply to the engine cannot be realized, namely, the fuel supply is cut off, so that the engine is flamed out.
The controller 4 is connected to the first detector 1, the second detector 2, and the fuel cut solenoid valve 3. In other words, the first detector 1 is connected to the controller 4, and the first detector 1 can transmit the detected real-time engine speed to the controller 4. The second detector 2 is connected to the controller 4, and the second detector 2 can transmit the detected real-time oil pressure of the fuel to the controller 4. The fuel cut-off solenoid valve 3 is connected to the controller 4 so that the controller 4 controls energization and de-energization of the fuel cut-off solenoid valve 3, that is, opening and closing of the valve of the fuel cut-off solenoid valve 3.
The controller 4 can process and analyze the real-time rotating speed and the real-time oil pressure. When the engine speed is higher than the first preset speed and the fuel pressure is lower than the predetermined pressure, and when the engine speed is higher than a second preset speed, which is higher than the first preset speed, the controller 4 controls the fuel cut-off solenoid valve 3 to cut off the fuel supply to shut off the engine. Optionally, the controller 4 is an 80C51 single chip microcomputer.
In other words, two rotational speed values and one fuel pressure value are preset according to specific operating parameters of the engine. One of the two rotation speed values is a first preset rotation speed, and the other is a second preset rotation speed. Normally, the first preset rotation speed is greater than or equal to the starting rotation speed of the engine, namely the minimum rotation speed which can be normally operated after the engine is started; the second preset speed is greater than the rated speed of the engine, when the rotating speed of the engine reaches the second preset speed, the engine usually has a 'runaway' fault, the rotating speed of the engine is higher and higher, the engine is out of control, and the engine is easily damaged seriously. Alternatively, the engine is a K38 engine, the first predetermined speed is 300 rpm and the second predetermined speed is 2450 rpm.
One fuel oil pressure value is preset pressure, when the fuel oil pressure is larger than or equal to the preset pressure, the engine can normally work, severe mechanical abrasion caused by poor lubrication is avoided, and the problems of bush ablation, bush locking and the like of the engine are avoided.
In order to avoid the damage to the engine caused by insufficient fuel oil pressure, the controller 4 controls the fuel cut-off solenoid valve 3 to be powered off and the valve of the fuel cut-off solenoid valve 3 to be closed to cut off the fuel supply when the real-time rotating speed of the engine is higher than the first preset speed and the real-time fuel oil pressure of the fuel is lower than the preset pressure, namely after the engine is started if the real-time fuel oil pressure of the fuel is relatively low, so that the engine is shut down.
In order to avoid the engine from losing control of the rotation speed to cause damage to the engine, the controller 4 controls the fuel cut-off solenoid valve 3 to be de-energized and the valve of the fuel cut-off solenoid valve 3 to be closed to cut off the fuel supply when the engine rotation speed is higher than a second preset speed, thereby shutting off the engine.
According to the engine protection device of the embodiment of the invention, when the engine speed is higher than the first preset speed and the fuel pressure is lower than the preset pressure and when the engine speed is higher than the second preset speed, the controller 4 controls the fuel cut-off electromagnetic valve 3 to be powered off, the valve of the fuel cut-off electromagnetic valve 3 is closed, and the fuel is not supplied to the engine any more, namely the fuel supply is cut off, so that the engine is shut down. Therefore, the engine cannot be seriously abraded due to poor lubrication after being started, the problems of bush ablation, bush locking and the like of the engine are avoided, and the engine is prevented from being damaged by timely controlling the rotating speed of the engine when the rotating speed of the engine is not controlled. In other words, the engine protection device provided by the embodiment of the invention can enable the engine to be flamed out in time under the two conditions, so that the safety of people and vehicles is guaranteed.
In some embodiments, the engine protection device further comprises a relay 5, and the relay 5 is connected with the controller 4. In other words, the controller 4 controls the relay 5 to be energized and de-energized.
The fuel cut-off solenoid valve 3 is connected to a normally closed contact of the relay 5. In other words, when the coil of the relay 5 is electrically operated, the normally closed contact of the relay 5 is in an off state, and the normally closed contact of the relay 5 is connected with the fuel cut-off electromagnetic valve 3, so that the fuel cut-off electromagnetic valve 3 is powered off, the valve of the fuel cut-off electromagnetic valve 3 is closed, the fuel supply of the engine is cut off, and the engine is rapidly decelerated and stopped, namely, the engine is automatically flameout.
It will be appreciated that when the engine speed is higher than the first preset speed and the fuel pressure is less than the predetermined pressure and the engine speed is higher than the maximum preset speed, the controller 4 controls the relay 5 to be energized, and then controls the valve of the fuel cut-off solenoid valve 3 to be closed to cut off the fuel supply, thereby shutting off the engine.
In some embodiments, the first detector 1 is a speed sensor. In other words, the engine speed is detected in real time by the speed sensor. The second detector 2 is an oil pressure switch. In other words, the fuel pressure is detected in real time by the oil pressure switch.
In some embodiments, the engine protection device further comprises an alarm 6, the alarm 6 is connected with the controller 4, and the alarm 6 gives an alarm when the engine speed is higher than a first preset speed and the fuel oil pressure is lower than a preset pressure and the engine speed is higher than a maximum preset speed. In other words, the controller 4 controls the alarm 6 to give an alarm when the engine speed is higher than the first preset speed and the fuel pressure is less than the predetermined pressure and the engine speed is higher than the maximum preset speed.
Alternatively, the alarm 6 is a buzzer, vibrator or flashing light. It will be appreciated that the invention is not so limited.
Optionally, the alarm 6 is connected with a normally open contact of the relay 5, and the controller 4 is connected with the relay 5. When the rotating speed of the engine is higher than a first preset rotating speed and the oil pressure of fuel oil is less than preset pressure and the rotating speed of the engine is higher than the highest preset rotating speed, the controller 4 controls the relay 5 to be electrified, the normally open contact of the relay 5 is in a connection state, the alarm 6 is connected with the controller 4 through the relay 5, and the alarm 6 gives an alarm.
It can be understood that when the engine speed is higher than the first preset speed and the fuel oil pressure is less than the preset pressure and the engine speed is higher than the highest preset speed, the fuel oil cut-off solenoid valve 3 cuts off the fuel oil supply to shut off the engine, and at the same time, the alarm 6 can give an alarm to prompt the relevant operators to further ensure the personal and vehicle safety.
In some embodiments, the engine protection device further comprises a display 7 for displaying the engine speed and the fuel oil pressure in real time, in other words, the engine protection device further comprises the display 7, the display 7 can display the engine speed and the fuel oil pressure in real time, so that relevant operators can visually and quickly acquire relevant parameters of the engine operation, specifically, the controller 4 is connected with the display 7, the received real-time engine speed and the received real-time fuel oil pressure of the engine can be visually displayed through the display 7, and optionally, the display 7 is an L CD1602 liquid crystal screen.
In some embodiments, the engine protection device further includes an accumulator (not shown) that powers the engine after the engine is shut down. Typically, the accumulator has about 80 second energy storage function. After the engine is shut off fuel supply and is flamed out, the energy accumulator can provide power for the engine in a short time for emergency treatment, and personal and vehicle safety is further guaranteed. Wherein, the energy accumulator can be the energy accumulator of the original vehicle.
An engine protection device according to an embodiment of the present invention will be described with reference to fig. 1 and 2.
As shown in fig. 1 and 2, an engine protection apparatus according to an embodiment of the present invention includes a first detector 1, a second detector 2, a fuel cut solenoid valve 3, a controller 4, a relay 5, an alarm 6, a display 7, and an accumulator.
The first detector 1 is connected with the controller 4, and the first detector 1 can detect the rotating speed of the engine in real time and transmit the rotating speed of the engine in real time to the controller 4. Optionally, the first detector 1 is a speed sensor.
The second detector 2 is connected with the controller 4, and the second detector 2 can detect the fuel oil pressure in real time and transmit the real-time oil pressure of the fuel to the controller 4. Alternatively, the second detector 2 is an oil pressure switch.
The controller 4 can process and analyze the real-time rotating speed and the real-time oil pressure. Optionally, the controller 4 is an 80C51 single chip microcomputer.
When the fuel cut-off electromagnetic valve 3 is electrified, the valve is opened to normally feed fuel to the engine, namely, fuel supply is realized, so that the engine normally works. When the fuel cut-off electromagnetic valve 3 is powered off, the valve is closed, and the normal fuel supply to the engine cannot be realized, namely, the fuel supply is cut off, so that the engine is flamed out.
When the alarm 6 is switched on, an alarm sound can be sent out to prompt the attention of the related operators. Alternatively, the alarm 6 is a buzzer, a vibrator, a flashing light, or the like.
The controller 4 is connected to a relay 5. When the rotating speed of the engine is higher than a first preset rotating speed and the oil pressure of the fuel is lower than a preset pressure, the controller 4 controls the relay 5 to be electrified; and when the engine speed is higher than a second preset speed, the controller 4 controls the relay 5 to be electrified.
Wherein, the normally closed contact of relay 5 links to each other with fuel cut-off solenoid valve 3, and the normally open contact of relay 5 links to each other with alarm 6. The controller 4 controls the relay 5 to be electrified, the fuel cut-off electromagnetic valve 3 is powered off, and the valve of the fuel cut-off electromagnetic valve 3 is closed to cut off the fuel supply, so that the engine is shut down; meanwhile, the alarm 6 is switched on, and the alarm 6 gives an alarm to prompt the attention of the related operator.
The display 7 can display the engine speed and the fuel oil pressure in real time so that relevant operators can visually and quickly acquire relevant parameters of the engine operation, and optionally, the display 7 is an L CD1602 liquid crystal screen.
The energy accumulator can provide power for the engine in a short time after the engine is flamed out for emergency treatment, and personal and vehicle safety is further guaranteed.
Specifically, as shown in fig. 2, in the engine protection device according to the embodiment of the present invention, an 80C51 single chip microcomputer is used as the controller 4, a L CD1602 liquid crystal display is used as the display 7, and the output is performed through a relay.
Wherein the signal input section: a P1.0 port of the singlechip introduces a fuel pressure low signal through a photoelectric coupler; the P3.4 port of the singlechip leads in a rotating speed signal of the engine through an NPN type triode; the base electrode of the triode is connected with two voltage-stabilizing tubes through a resistor and used for input protection of the triode.
The output part of the protector: the port P1.1 of the singlechip is output through a photoelectric coupler to drive an IRF9540N field effect triode to control the action of a relay.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. An engine protection device, comprising: the fuel cut-off control system comprises a first detector for detecting the rotating speed of an engine in real time, a second detector for detecting the oil pressure of fuel in real time, a fuel cut-off electromagnetic valve and a controller, wherein the controller is connected with the first detector, the second detector and the fuel cut-off electromagnetic valve and controls the fuel cut-off electromagnetic valve to cut off fuel supply to shut off the engine when the rotating speed of the engine is higher than a first preset rotating speed and the oil pressure of the fuel is lower than preset pressure and the rotating speed of the engine is higher than a second preset rotating speed, and the second preset rotating speed is larger than the first preset rotating speed.
2. The engine protection device of claim 1, further comprising a relay connected to the controller, and the fuel cut solenoid valve is connected to a normally closed contact of the relay.
3. The engine protection device of claim 1, wherein the first detector is a speed sensor and the second detector is an oil pressure switch.
4. The engine protection device of claim 1, further comprising an alarm coupled to the controller, the alarm providing an alert when the engine speed is greater than a first predetermined speed and the fuel pressure is less than a predetermined pressure and when the engine speed is greater than a maximum predetermined speed.
5. The engine protection device of claim 4, wherein the alarm is a buzzer, vibrator, or flashing light.
6. The engine protection device of claim 1, further comprising a display that displays said engine speed and said fuel oil pressure in real time.
7. The engine protection device of claim 1, wherein the engine is a K38 engine, the first predetermined speed is 300 rpm, and the second predetermined speed is 2450 rpm.
8. The engine protection device of any of claims 1-7, further comprising an accumulator that powers the engine after the engine is shut down.
9. The engine protection device of any one of claims 1-7, wherein the controller is an 80C51 single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917000.0A CN111425312A (en) | 2019-09-26 | 2019-09-26 | Engine protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917000.0A CN111425312A (en) | 2019-09-26 | 2019-09-26 | Engine protection device |
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| CN111425312A true CN111425312A (en) | 2020-07-17 |
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| CN201910917000.0A Pending CN111425312A (en) | 2019-09-26 | 2019-09-26 | Engine protection device |
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Cited By (1)
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| CN112483295A (en) * | 2020-11-25 | 2021-03-12 | 三一重机有限公司 | Starting control method and device and engineering machinery |
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Application publication date: 20200717 |
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| RJ01 | Rejection of invention patent application after publication |