CN2248249Y - Intelligent control instrument for diesel engine - Google Patents
Intelligent control instrument for diesel engine Download PDFInfo
- Publication number
- CN2248249Y CN2248249Y CN 95240950 CN95240950U CN2248249Y CN 2248249 Y CN2248249 Y CN 2248249Y CN 95240950 CN95240950 CN 95240950 CN 95240950 U CN95240950 U CN 95240950U CN 2248249 Y CN2248249 Y CN 2248249Y
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- circuit
- diesel engine
- engine protection
- oil pressure
- gate
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Abstract
The utility model discloses an intelligent control instrument for a diesel engine, which is characterized in that an amplifying and shaping circuit is connected with the input end of a sensor, the amplifying and shaping circuit is connected with a diesel engine protective circuit via one not gate, the amplifying and shaping circuit is connected with a digital display circuit via the other not gate, the digital display circuit is connected with a time base circuit and a latch signal circuit, and a power circuit is connected with all the circuits mentioned above. The utility model has the advantages of compact structure, simple structure, low cost, powerful function, and stable performance.
Description
The utility model relates to the protection and the control of diesel engine, is a kind of electronic protection that is used for diesel engine.
Diesel engine is being extensive use of in all trades and professions, and it can break down because of a variety of causes, uses and working life thereby influence is normal.Therefore, for diesel engine provide reliable protection with regard to become pendulum in face of people, need the urgent problem that solves.Existing diesel engine protective circuit, because function singleness, functional reliability is poor, is difficult to adapt to well the needs of reality.
The purpose of this utility model provides a kind of compact structure, diesel engine simple, that function is strong, stable and reliable for performance is protected smart instrumentation.
Technical solution of the present utility model is: a kind of diesel engine protection smart instrumentation; it has adopted prior art not have the design of adopting: an amplification and rectification circuit that links to each other with the sensor input end is arranged; amplification and rectification circuit joins through not gate and diesel engine protective circuit; amplification and rectification circuit also joins through another not gate and digital display circuit; digital display circuit also is connected to time base circuit and latch signal circuit, and a power circuit and above-mentioned each circuit join.
Diesel engine protective circuit described in the utility model comprises the oil pressure protective circuit, reaches the overspeed protection circuit.Certainly, where necessary, also can add other suitable protective circuits.
Be connected to the frequency/voltage conversion circuit before the oil pressure protective circuit described in the utility model.Certainly, also can connect same conversion circuit before other protective circuits, or adopt same conversion circuit with the oil pressure protective circuit.
Behind the frequency/voltage conversion circuit described in the utility model, also be connected to the diesel engine speed regulation protective circuit.Certainly, also can not connect above-mentioned circuit, or be connected to other protective circuits.
A comparator is arranged in the overspeed protection circuit described in the utility model, and comparator output terminal is connected to triode, and triode and an overspeed protecting relay join.Certainly, also can adopt the overspeed protection circuit of other suitable construction forms.
Oil pressure protective circuit described in the utility model comprises an emitter follower that joins with aforementioned frequency/voltage conversion circuit, and in-phase amplifier and emitter follower join, and a triode links to each other with in-phase amplifier, and triode is connected to the oil pressure protective relay.Certainly, also can adopt the oil pressure protective circuit of other suitable construction forms.
Amplification and rectification circuit described in the utility model is a Schmidt circuit that is made of non-anti-door comparator.Certainly, also can adopt other suitable amplification and rectification circuits.
Time base circuit described in the utility model adopts 4060 intergrated circuit, and 4060 intergrated circuit connect a double D trigger 4013.Certainly, also can under the situation of assurance function, adopt other suitable intergrated circuit or circuit structures.
Latch cicuit described in the utility model adopts 4538 accurate monostable multivibrators.Certainly, also can replace other intergrated circuit with similar functions or circuit structures.
The utility model has the advantages that: compact structure, simple, volume is little, be not afraid of vibration, can be fit to be arranged on the diesel engine instrument panel.Cost is low, function is strong, and is stable and reliable for performance.The selected integrated chip of circuit is very common, available everywhere, low price.Can measure rotating speed, and available 4-digit number shows the speed revolution value of diesel engine per minute.The diesel engine water temperature is higher than can be reported to the police and protect after spacing.Have the diesel engine overspeed protection, and the test button of 80% rated speed test overspeed protection function.When diesel engine is in operation, lubricating oil pressure is lower than limit value, and instrument can report to the police and protect.The emergency shut-down control device function is arranged.The organic assembling of appliance circuit; make and the utlity model has certain " intelligence "; promptly when diesel engine does not turn round; diesel engine speed is zero; the lubricating oil pressure of diesel engine is zero; instrument can not reported to the police; can not control outside executive component action yet; only when the operation speed of diesel engine reaches more than 300 rev/mins, be lower than limit value as the lubrication pressure of diesel engine, this moment, instrument was just reported to the police; while instrument output signal; control outside executive component action, force diesel engine to stop, thereby reach the purpose of automatic protection diesel engine.
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of a kind of diesel engine protection smart instrumentation of the present utility model.
Fig. 2 is the circuit structure diagram of a kind of diesel engine protection smart instrumentation of the present utility model.
Fig. 1 has described basic principle of the present utility model.In a casing 12; following circuit is housed: an amplification and rectification circuit 1 that links to each other with the sensor input end is arranged; the output of amplification and rectification circuit 1 through not gate 4069-1 and one by frequency/voltage conversion circuit 6; the oil pressure protective circuit that oil pressure protective circuit 7 and oil pressure protective relay 3J constitute is partly joined; again through not gate 4609-2 and one by overspeed protection circuit 8; the overspeed protection that overspeed protecting relay 4J constitutes is partly joined; and link to each other with a digital display circuit 5 through not gate 4069-3 again; digital display circuit 5 also is connected to time base circuit 9; 10, one power circuits of latch signal circuit 11 join with above-mentioned each circuit.
Fig. 2 has described an embodiment of the present utility model.Sampling gear and a magnetic quantity transducer by 60 even teeth have been formed sampling mechanism (can adopt prior art), to obtain the input end int that signal frequency number that rpm converts to is added in input circlult, obtain a standard square wave through after the shaping, and drive different loads respectively by three not gate 4069-1,4069-2,4069-3, with the minimizing load effect, thereby obtain good test characteristic.This input resistance is 10K Ω.Wherein 339 chips are four not gate comparators, 4069 chips are six not gates, and 339 chips are formed a Schmidt circuit will make square wave be shaped into 4.5 volts of peak-to-peak values by 4069 not gates by the signal shaping square wave of sensor input, each load circuit of back is delivered to again along more steep in front and back.This amplification and rectification circuit also comprises components and parts such as diode D1, D2, resistance R 4, R5, R6, R7.
4060 chips are one ten level Four counter, frequency divider, oscillator, as long as connect suitable Resistor-Capacitor Unit and crystal can obtain desired oscillation frequency.4060 chips in this routine circuit connect into the 32768HZ crystal oscillator, and through the square signal of 14 frequency divisions at 3 pin output 2HZ, it is 1 second second signal that this signal obtains pulsewidth through double D trigger 4,013 twice frequency division again, thus obtained second signal, to send into latch cicuit, and the pulsewidth delay circuit, obtain zero clearing thus, count signal.The latch signal circuit is formed by connecting by two monostable circuits of a slice 4538 (I) chip, in this circuit 4538 is made up of two monostable multivibrators, the two poles of the earth all are connected into triggering mode again, monostable one is that the back is along triggering, monostable two is preceding triggering, monostable one connects input signal, when arrive in the edge, back, a monostable upset, and reset immediately, its output terminal can obtain width and have only 0.2-0.3 μ s (equaling the transmission time sum of two monostable internal trigger) latch signal, and the monostable time is by element R2, the C1 decision, T=R2 * C1 (S), approximately be 0.7S, at this moment between in monostable two be forced to reset, can not overturn, make the demonstration reading of nixie tube keep can not becoming, eyes did not have flickering when the people was watched always.The monostable circuit of 4538 (II) chip is that trigger on the edge, back, and input signal adds via not gate, its transient state time T=R8 * C11 (S).In the foregoing circuit, 4060 chips also are circumscribed with elements such as resistance R 3, capacitor C 2, C3, and 4538 (I) are connected to capacitor C 1, resistance R 2,4538 (II) is connected to elements such as resistance R 8, capacitor C 11.
The digital display circuit is made up of chip 4511,4518.4518 are made of two BCD up counter circuit with Clock enable function.During use, if with rising edge clock trigger signal by CP input and to make the EN end be level"1", if trigger then signal is imported by EN with the clock trailing edge, and to make CP be level "0", as then counter is zero with Cr set level.Chip 4511 is BCD7 section/latch/decoder/drivers, it is the decoder that the BCD code is converted to 7 sections outputs, and it can directly drive seven sections LED of common cathode, the BI input is placed low level, just can make complete section to place blank (lamp does not work), when LE is input as high level, latch the input data.
Comparator 339-2; 4 pin are a fixed voltage; its value is decided by that 5V voltage is through R10, R29 voltage after partial value; 5 pin are rotating speed---the magnitude of voltage that voltage conversion circuit comes; the certain revolution of its representative; because certain magnitude of voltage is being represented certain rotating speed; when the voltage correspondence that we set 4 pin the voltage pole limit value of hypervelocity, when current diesel engine speed overstepped the extreme limit, 5 pin voltages will be greater than 4 pin voltages; the comparator upset; the output high level makes triode G3 conducting, the 4J actuating of relay; the work of drive protective circuit is shut down and acoustooptic alarm.
Press the K3 switch, 4 pin voltages are reduced to corresponding 80% rotating speed protection value, just can play the effect of 80% overspeed protection this moment.
555 chips are connected into monostable circuit, output low level during stable state, when a negative sharp pulse is added on the pin 2,555 monostable circuits will overturn, and enter transient state, the output high level, transient state time t=1.1R15 * C8, by R15 and the decision of C8 value, after transient state finishes, the low level when output is got back to stable state again.
It is special when frequency input signal changes, the waveform duty cycle of 555 output terminals, 3 pin will change, input signal cycle short more (being that frequency is high more), the big more corresponding flip-flop of waveform duty cycle is many more, otherwise it is also anti-, amplify back output by double operational again via its VDC after R16, R17, the C9 filtering, this has just finished frequency---voltage transformation.
The first order 358 double operational 358-1 are connected into emitter follower, play buffer action, and second level 358-2 is connected into in-phase amplifier, and magnification factor K=1+R20/R10 is a power supply owing to adopted 24V, so output voltage range is bigger, can change to about 20V from 0V.
7 pin output voltages of double operational 358 go to drive oil pressure protection action; YBY connects when oil pressure is undesired; charging can make the triode conducting to 7 pin voltages to electric capacity, and the 3J actuating of relay drives protective circuit work; shut down and acoustooptic alarm; though YBY connects during diesel engine starting, because the 7 pin voltages of this moment 358 are too low very slow to the C12 charging, turn-on transistor at once not; the 3J relay can not move, and does not have the mistakenly stop phenomenon during starting and takes place.
For reliable and secure, this circuit has adopted that two regulator block LM7805 chips are in parallel to be used, and its output current of every can reach 1 ampere, and back in parallel safety coefficient is strengthened greatly, and the required electric current of this circuit 5V voltage is only below 100 milliamperes, thereby very reliable.
The quenching resistor R24 of circuit front, should select power for use is the resistance of 5W, wishes that it can fall the voltage of 10V, the chip of back can be worked under safe voltage like this.
Overspeed protecting relay 4J contact in the circuit; oil pressure protective relay 3J contact; water temperature protective relay 5J contact; self check starts the 1J contact; all and insert on 1J, 2J two relay coils; so no matter which kind of protection starts back 1J, the 2J relay all can move simultaneously, start, go to shut down and report to the police total drive JJ relay (outside this machine) then.All relays all have latching circuit, and the relay employing is double-contact, and therefore, the protection action is very reliable.
Also comprise following elements in the foregoing circuit: integrated chip 4513, not gate 4069-6, Triode G2, diode D3, D4, D5, D6, D7, D8, luminous tube L2, L3, L4, Alarm bell B1, resistance R 1, R9, R11, R13, R40, R3, R14, R18, R19, R21, R22, R23, R25, R26, R27, R28, capacitor C 5, C6, C7, C15, C16, C17, C19, C20 etc.
Claims (9)
1, a kind of diesel engine protection smart instrumentation; it is characterized in that: an amplification and rectification circuit that links to each other with the sensor input end is arranged; amplification and rectification circuit joins through not gate and diesel engine protective circuit; amplification and rectification circuit also joins through another not gate and digital display circuit; digital display circuit also is connected to into basic circuit and latch signal circuit, and a power circuit and above-mentioned each circuit join.
2, diesel engine protection smart instrumentation according to claim 1, it is characterized in that: described diesel engine protective circuit comprises the oil pressure protective circuit, reaches the overspeed protection circuit.
3, diesel engine protection smart instrumentation according to claim 2 is characterized in that: be connected to the frequency/voltage conversion circuit before the described oil pressure protective circuit.
4, diesel engine protection smart instrumentation according to claim 3 is characterized in that: behind the described frequency/voltage conversion circuit, also be connected to the diesel engine speed regulation protective circuit.
5, diesel engine protection smart instrumentation according to claim 2, it is characterized in that: a comparator is arranged in the described overspeed protection circuit, and comparator output terminal is connected to triode, and triode and an overspeed protecting relay join.
6, diesel engine protection smart instrumentation according to claim 3; it is characterized in that: described oil pressure protective circuit comprises an emitter follower that joins with aforementioned frequency/voltage conversion circuit; in-phase amplifier and emitter follower join; a triode links to each other with in-phase amplifier, and triode is connected to the oil pressure protective relay.
7, diesel engine protection smart instrumentation according to claim 1, it is characterized in that: described amplification and rectification circuit is a Schmidt circuit that is made of four not gate comparators.
8, according to claim 1 or 2,3,4,5,6,7 described diesel engine protection smart instrumentations, it is characterized in that: described time base circuit adopts 4060 intergrated circuit, and 4060 intergrated circuit connect a double D trigger 4013.
9, according to claim 1 or 2,3,4,5,6,7 described diesel engine protection smart instrumentations, it is characterized in that: described latch cicuit adopts 4538 accurate monostable multivibrators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240950 CN2248249Y (en) | 1995-11-24 | 1995-11-24 | Intelligent control instrument for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240950 CN2248249Y (en) | 1995-11-24 | 1995-11-24 | Intelligent control instrument for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2248249Y true CN2248249Y (en) | 1997-02-26 |
Family
ID=33882434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95240950 Expired - Fee Related CN2248249Y (en) | 1995-11-24 | 1995-11-24 | Intelligent control instrument for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2248249Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509429B (en) * | 2009-03-09 | 2012-07-04 | 齐齐哈尔轨道交通装备有限责任公司 | Diesel engine control system and control method |
| CN102628875A (en) * | 2012-05-10 | 2012-08-08 | 长沙全程数字机电科技有限公司 | Rotating speed monitoring instrument |
| CN115355099A (en) * | 2022-08-31 | 2022-11-18 | 中船动力研究院有限公司 | Diesel engine overspeed protection device and diesel engine |
-
1995
- 1995-11-24 CN CN 95240950 patent/CN2248249Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509429B (en) * | 2009-03-09 | 2012-07-04 | 齐齐哈尔轨道交通装备有限责任公司 | Diesel engine control system and control method |
| CN102628875A (en) * | 2012-05-10 | 2012-08-08 | 长沙全程数字机电科技有限公司 | Rotating speed monitoring instrument |
| CN115355099A (en) * | 2022-08-31 | 2022-11-18 | 中船动力研究院有限公司 | Diesel engine overspeed protection device and diesel engine |
| CN115355099B (en) * | 2022-08-31 | 2024-04-19 | 中船动力研究院有限公司 | Overspeed protection device of diesel engine and diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |