CN104807647A - Dual closed-loop-based engine oil constant-temperature control system - Google Patents
Dual closed-loop-based engine oil constant-temperature control system Download PDFInfo
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- CN104807647A CN104807647A CN201510173664.2A CN201510173664A CN104807647A CN 104807647 A CN104807647 A CN 104807647A CN 201510173664 A CN201510173664 A CN 201510173664A CN 104807647 A CN104807647 A CN 104807647A
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Abstract
The invention discloses a dual closed-loop-based engine oil constant-temperature control system. The dual closed-loop-based engine oil constant-temperature control system comprises an engine oil tank (1), a first temperature sensor (2), a first normally-closed electromagnetic valve (3), an oil suction pump (4), a cooler (5), a filter (6), a control system (7), an oil outlet pipe (8), an oil inlet pipe (9), a second temperature sensor (11), a normally-open electromagnetic valve (10), a circulating pipe (14), a second normally-closed electromagnetic valve (12) and a closed-loop control system (13). By means of a dual closed-loop control mode, the dual closed-loop-based engine oil constant-temperature control system can well control the temperature of engine oil within a required range.
Description
Technical field
The present invention relates to Engine Block Test field, specifically refer to the engine motor oil thermostatic control system based on double-closed-loop control.
Background technology
People improve constantly the reliability of automobile, the requirement of the aspect such as security and green, and engine is as the heart component of automobile, its technical merit directly has influence on the performance index such as its dynamic property, economy and discharge, and the frequency of engine breakdown is also the highest.And engine performance test is the Main Means judging condition of the engine quality, be also the important content of automotive check and maintenance job, therefore engine performance measuring is more and more subject to people's attention.
Engine is when testing, and each moving component all needs oil lubricating, and therefore all engines are equipped with lubricating system.By lubricating oil pump, high-pressure oil is transported to each kinematic pair through oil duct and carries out forced lubrication, also some kinematic pair is by machine oil spray lubrication working surface.The stickiness temperature influence of machine oil is larger, oil temperature its stickiness higher is lower, even can lose efficacy, so the general oil temperature upper limit will control at 80 ~ 95 degree, engine motor oil temperature control system can be provided with in engine testing system, to control the temperature of engine motor oil for this reason.But the temperature control effect of traditional engine motor oil temperature control system bad, cannot well oil temperature be controlled within the temperature range required.
Summary of the invention
The object of the invention is to solve the bad defect of current the used temperature control effect sending out machine oil temperature control system, a kind of engine motor oil thermostatic control system based on double-closed-loop control is provided.
Object of the present invention is by following technical proposals reality: based on the engine motor oil thermostatic control system of double-closed-loop control, comprise engine oil tank, the first temperature sensor, first normally closed solenoid valve, oil suction pump, refrigeratory, filtrator, control system, flowline and oil inlet pipe; First oil-in of this refrigeratory is connected with engine oil tank by flowline, its first oil-out is then connected with engine oil tank by oil inlet pipe, first normally closed solenoid valve is then arranged on flowline, and oil suction pump to be arranged on flowline and between the first normally closed solenoid valve and refrigeratory, filtrator is arranged on oil inlet pipe, first temperature sensor is then arranged on bottom engine oil tank, and described first temperature sensor, the first normally closed solenoid valve, oil suction pump are all connected with control system.Wherein, the present invention also includes and is arranged on oil inlet pipe and the second temperature sensor of close refrigeratory side, to be arranged on oil inlet pipe and normally open solenoid valve between filtrator and the second temperature sensor, the circulation pipe that one end is connected with the second oil-out of refrigeratory, the other end is then connected with the second oil-in of refrigeratory, be arranged on the second normally closed solenoid valve on circulation pipe, and the closed-loop control system be simultaneously connected with normally open solenoid valve, the second temperature sensor, the second normally closed solenoid valve.
Further, described closed-loop control system is by control chip U3, field effect transistor Q, triode VT6, one end is connected with the drain electrode of field effect transistor Q, the other end is then in turn through resistance R15, the resistance R14 be connected with the emitter of triode VT6 after electric capacity C9 and resistance R18, N pole is connected with the source electrode of field effect transistor Q, the diode D10 that P pole is then connected with the tie point of electric capacity C9 with resistance R18, positive pole is connected with the CONT pin of control chip U3, the electric capacity C10 that negative pole is connected with the P pole of diode D10, one end is connected with the OUT pin of control chip U3, the resistance R16 that the other end is connected with the grid of field effect transistor Q, N pole is connected with the source electrode of field effect transistor Q, the diode D11 that P pole is connected with the base stage of triode VT6 after resistance R17, positive pole is connected with the P pole of diode D11, negative pole is as the electric capacity C12 of system one output terminal, and negative pole is connected with the N pole of diode D11, the electric capacity C11 that positive pole is connected with the collector of triode VT6 forms, the VCC pin of described control chip U3 is all connected with the drain electrode of field effect transistor Q with RESET pin, its THRE pin is all connected with the tie point of resistance R15 with resistance R14 with TRI pin, GND pin ground connection, DIS pin are connected with the collector of triode VT6.
Described control system is by transformer T, be arranged on the telefault L1 on the former limit of transformer T, be arranged on telefault L2 and the telefault L3 of transformer secondary, the front end signal treatment circuit be connected with telefault L1, the intermediate treatment circuit be connected with telefault L2, the sensor-triggered control circuit be connected with intermediate treatment circuit, the signal trimming circuit be connected with telefault L3, and form with the oil suction pump trigger control circuit that signal trimming circuit is connected with sensor-triggered control circuit simultaneously.
Described front end signal treatment circuit comprises fuse R1, diode bridge rectifier U, electric capacity C1, diode D2, and voltage stabilizing diode D1; One input end of diode bridge rectifier U is connected with a signal output part of the first temperature sensor after fuse R1, its another input end is then connected with another signal output part of the first temperature sensor, the positive pole of electric capacity C1 is connected with cathode output end with the cathode output end of diode bridge rectifier U respectively with negative pole, and the N pole of voltage stabilizing diode D1 is connected with the positive pole of electric capacity C1, its P pole is then connected with the negative pole of electric capacity C1 after diode D2; The Same Name of Ends of described telefault L1 is connected with the positive pole of electric capacity C1, its non-same polarity is connected with the negative pole of electric capacity C1.
Described intermediate treatment circuit is by triode VT1, unidirectional thyristor D4, N pole is connected with the N pole of unidirectional thyristor D4, the diode D3 that P pole is then connected with the non-same polarity of telefault L2, the resistance R2 be in parallel with diode D3, positive pole is connected with the N pole of diode D3, the electric capacity C2 that negative pole is then connected with the P pole of unidirectional thyristor D4, one end is connected with the N pole of unidirectional thyristor D4, the inductance L 4 that the other end is connected with the emitter of triode VT1, one end is connected with the control pole of unidirectional thyristor D4, the resistance R3 that the other end is connected with the base stage of triode VT1, and one end is connected with the base stage of triode VT1, the resistance R4 that the other end is connected with signal trimming circuit forms, the P pole of described unidirectional thyristor D4 is connected with the Same Name of Ends of telefault L2, and the emitter and collector of triode VT1 is all connected with sensor-triggered control circuit, base stage is connected with the P pole of unidirectional thyristor D4.
Described sensor-triggered control circuit is by flip chip U2, triode VT2, triode VT3, one end is connected with the collector of triode VT1, the resistance R5 that the other end is connected with the VDD pin of flip chip U2, positive pole is connected with the collector of triode VT1, the electric capacity C3 that negative pole is then connected with the FB pin of flip chip U2 after relay K, N pole is connected with the base stage of triode VT3 after resistance R7, the diode D5 that P pole is connected with tie point and the oil suction pump trigger control circuit of relay K with electric capacity C3 simultaneously, one end is connected with the CS pin of flip chip U2, the resistance R8 that the other end is connected with the P pole of diode D5, and the resistance R6 be serially connected between the base stage of triode VT2 and emitter forms, the BD pin of described flip chip U2 is connected with the emitter of triode VT1, GND pin ground connection, FB pin are connected with the collector of triode VT3, the base stage of triode VT2 is connected with the BD pin of flip chip U2, collector is connected with the SW pin of flip chip U2, emitter is connected with the emitter of triode VT3, the emitter of triode VT3 also after the normally opened contact K-1 of relay K as signal one output terminal.
Described signal trimming circuit is by triode VT4, the diode D6 that P pole is connected with the non-same polarity of telefault L3, N pole is connected with the base stage of triode VT4, the electric capacity C4 that positive pole is connected with the N pole of diode D6, negative pole is connected with the Same Name of Ends of telefault L3, the resistance R9 be in parallel with electric capacity C4, the resistance R10 that one end is connected with the collector of triode VT4, the other end is connected with the Same Name of Ends of telefault L3, and the resistance R11 that one end is connected with resistance R4, the other end is connected with the Same Name of Ends of telefault L3 forms; The emitter of institute triode VT4 is all connected with oil suction pump trigger control circuit with the Same Name of Ends of telefault L3.
Described oil suction pump trigger control circuit is by triode VT5, bidirectional thyristor D9, N pole is connected with the base stage of triode VT5 after resistance R13, the diode D8 that P pole is then connected with the Same Name of Ends of telefault L3 after electric capacity C8, N pole is connected with the P pole of diode D8, the voltage stabilizing diode D7 that P pole is connected with the emitter of triode VT4, the electric capacity C5 be in parallel with voltage stabilizing diode D7, positive pole is connected with the P pole of voltage stabilizing diode D7, the electric capacity C6 that negative pole is connected with the first anode of bidirectional thyristor D9, one end is connected with the P pole of voltage stabilizing diode D7, the resistance R12 that the other end is connected with the base of triode VT5, and positive pole is connected with the emitter of triode VT5, negative pole forms with the electric capacity C7 that the first anode of bidirectional thyristor D9 is connected with second anode simultaneously, the control pole of described bidirectional thyristor D9 is connected with the collector of triode VT5, and the emitter of triode VT5 is connected with the P pole of voltage stabilizing diode D7 and the P pole of diode D5 simultaneously.
Described flip chip U2 is ACT364 integrated chip, and control chip U3 is then NE555 integrated circuit.
The first described temperature sensor and the second temperature sensor are BD-WZP-PT100 type oil temperature sensor.
The present invention compared with prior art has the following advantages and beneficial effect:
1, the present invention adopts the mode of double-closed-loop control to control oil temperature, can be good at oil temperature to control in the scope needed.
2, Control system architecture of the present invention is simple, and the electronic component used is with low cost.
3, temperature sensor reaction velocity of the present invention is fast, precision is high, ensure that the control accuracy of automatic temperature control system.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is closed-loop control system electrical block diagram of the present invention;
Fig. 3 is control system electrical block diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present invention includes engine oil tank 1, the first temperature sensor 2, first normally closed solenoid valve 3, oil suction pump 4, refrigeratory 5, filtrator 6, control system 7, flowline 8, oil inlet pipe 9, second temperature sensor 11, normally open solenoid valve 10, circulation pipe 14, second normally closed solenoid valve 12, closed-loop control system 13.In order to realize the control to oil temperature, the first oil-in of this refrigeratory 5 is connected with engine oil tank 1 by flowline 8, so that the high temperature oil in engine oil tank 1 can be input in refrigeratory 5 by flowline 8.First oil-out of refrigeratory 5 is then connected with engine oil tank 1 by oil inlet pipe 9, can be transmitted back in engine oil tank 1 by oil inlet pipe 9 by the cooled machine oil of refrigeratory 5.First normally closed solenoid valve 3 is arranged on flowline 8, and oil suction pump 4 to be arranged on flowline 8 and between the first normally closed solenoid valve 3 and refrigeratory 5.Filtrator 6 is arranged on oil inlet pipe 9, and the first temperature sensor 2 is arranged on bottom engine oil tank 1, and described first temperature sensor 2, first normally closed solenoid valve 3, oil suction pump 4 are all connected with control system 7.Second temperature sensor 11 is then arranged on the oil inlet pipe 9 and side of close refrigeratory 5, normally open solenoid valve 10 to be arranged on oil inlet pipe 9 and between filtrator 6 and the second temperature sensor 11, one end of circulation pipe 14 is connected with the second oil-out of refrigeratory 5, the other end is then connected with the second oil-in of refrigeratory 5, second normally closed solenoid valve 12 is arranged on circulation pipe 14, and closed-loop control system 13 is connected with normally open solenoid valve 10, second temperature sensor 11, second normally closed solenoid valve 12 simultaneously.
First temperature sensor 2 can detect the oil temperature in engine oil tank 1, and its BD-WZP-PT100 type oil temperature sensor adopting Bo electricity Science and Technology Ltd. of Shenzhen to produce realizes.After oil temperature reaches 80 DEG C, the first temperature sensor 2 sends a signal to control system 7, controls the first normally closed solenoid valve 3 to open and oil suction pump 4 starts by control system 7.At this moment, the high temperature oil in engine oil tank 1 is then transported to refrigeratory 5 by flowline 8 and carries out really cold.In the process the second temperature sensor 11 can detect cold really after oil temperature, as cold really after oil temperature reach the requirement of needs, be then transmitted back in engine oil tank by oil inlet pipe 9 after filter 6 filters and continue to use.If cold really after oil temperature or too high, at this moment the second temperature sensor 11 can send a signal to closed-loop control system 13, control normally open solenoid valve by closed-loop control system 13 to close, second normally closed solenoid valve 12 is opened, machine oil then can again flow into refrigeratory 5 from circulation pipe 14 and cool, until oil temperature is just transmitted back to engine oil tank 1 after reaching requirement.The BD-WZP-PT100 type oil temperature sensor that this second temperature sensor 11 also adopts Bo electricity Science and Technology Ltd. of Shenzhen to produce realizes.
Closed-loop control system 13 is emphasis place of the present invention, as shown in Figure 2, it is by control chip U3, field effect transistor Q, triode VT6, one end is connected with the drain electrode of field effect transistor Q, the other end is then in turn through resistance R15, the resistance R14 be connected with the emitter of triode VT6 after electric capacity C9 and resistance R18, N pole is connected with the source electrode of field effect transistor Q, the diode D10 that P pole is then connected with the tie point of electric capacity C9 with resistance R18, positive pole is connected with the CONT pin of control chip U3, the electric capacity C10 that negative pole is connected with the P pole of diode D10, one end is connected with the OUT pin of control chip U3, the resistance R16 that the other end is connected with the grid of field effect transistor Q, N pole is connected with the source electrode of field effect transistor Q, the diode D11 that P pole is connected with the base stage of triode VT6 after resistance R17, positive pole is connected with the P pole of diode D11, negative pole is as the electric capacity C12 of system one output terminal, and negative pole is connected with the N pole of diode D11, the electric capacity C11 that positive pole is connected with the collector of triode VT6 forms, the VCC pin of described control chip U3 is all connected with the drain electrode of field effect transistor Q with RESET pin, its THRE pin is all connected with the tie point of resistance R15 with resistance R14 with TRI pin, GND pin ground connection, DIS pin are connected with the collector of triode VT6.Wherein, VCC pin signal input end together with the P pole of diode D10 of control chip U3, this input end is then connected with the signal output part of the second temperature sensor 11.And one end of electric capacity C12 signal output terminal together with the N pole of diode D1, this signal output part is then connected with the signal input part of normally open solenoid valve 10 with the second normally closed solenoid valve 12, to control it.In order to better implement the present invention, this control chip U3 is preferably NE555 integrated circuit.
As shown in Figure 3, this control system 7 is by transformer T, be arranged on the telefault L1 on the former limit of transformer T, be arranged on telefault L2 and the telefault L3 of transformer secondary, the front end signal treatment circuit 71 be connected with telefault L1, the intermediate treatment circuit 72 be connected with telefault L2, the sensor-triggered control circuit 73 be connected with intermediate treatment circuit 72, the signal trimming circuit 74 be connected with telefault L3, and form with the oil suction pump trigger control circuit 75 that signal trimming circuit 74 is connected with sensor-triggered control circuit 73 simultaneously.
And front end signal treatment circuit 71 wherein comprises fuse R1, diode bridge rectifier U, electric capacity C1, diode D2, and voltage stabilizing diode D1.During connection, one input end of diode bridge rectifier U is connected with a signal output part of the first temperature sensor 2 after fuse R1, its another input end is then connected with another signal output part of the first temperature sensor 2, the positive pole of electric capacity C1 is connected with cathode output end with the cathode output end of diode bridge rectifier U respectively with negative pole, and the N pole of voltage stabilizing diode D1 is connected with the positive pole of electric capacity C1, its P pole is then connected with the negative pole of electric capacity C1 after diode D2.The Same Name of Ends of described telefault L1 is connected with the positive pole of electric capacity C1, its non-same polarity is connected with the negative pole of electric capacity C1.The signal that first temperature sensor 2 sends carries out boosting by transformer T again and processes after diode bridge rectifier U rectification, electric capacity C1 filtering and voltage stabilizing diode D1 voltage stabilizing.The signal exported from transformer T is then divided into two-way, and wherein a road is input to intermediate treatment circuit 72, and another road is then input to signal trimming circuit 74.
Wherein a road signal is input to sensor-triggered control circuit 73 again after intermediate treatment circuit 72 processes, this intermediate treatment circuit 72 is by triode VT1, unidirectional thyristor D4, N pole is connected with the N pole of unidirectional thyristor D4, the diode D3 that P pole is then connected with the non-same polarity of telefault L2, the resistance R2 be in parallel with diode D3, positive pole is connected with the N pole of diode D3, the electric capacity C2 that negative pole is then connected with the P pole of unidirectional thyristor D4, one end is connected with the N pole of unidirectional thyristor D4, the inductance L 4 that the other end is connected with the emitter of triode VT1, one end is connected with the control pole of unidirectional thyristor D4, the resistance R3 that the other end is connected with the base stage of triode VT1, and one end is connected with the base stage of triode VT1, the resistance R4 that the other end is connected with signal trimming circuit 74 forms.The P pole of described unidirectional thyristor D4 is connected with the Same Name of Ends of telefault L2, and the emitter and collector of triode VT1 is all connected with sensor-triggered control circuit 73, base stage is connected with the P pole of unidirectional thyristor D4.
Described sensor-triggered control circuit 73 is by flip chip U2, triode VT2, triode VT3, one end is connected with the collector of triode VT1, the resistance R5 that the other end is connected with the VDD pin of flip chip U2, positive pole is connected with the collector of triode VT1, the electric capacity C3 that negative pole is then connected with the FB pin of flip chip U2 after relay K, N pole is connected with the base stage of triode VT3 after resistance R7, the diode D5 that P pole is connected with tie point and the oil suction pump trigger control circuit 75 of relay K with electric capacity C3 simultaneously, one end is connected with the CS pin of flip chip U2, the resistance R8 that the other end is connected with the P pole of diode D5, and the resistance R6 be serially connected between the base stage of triode VT2 and emitter forms, the BD pin of described flip chip U2 is connected with the emitter of triode VT1, GND pin ground connection, FB pin are connected with the collector of triode VT3, the base stage of triode VT2 is connected with the BD pin of flip chip U2, collector is connected with the SW pin of flip chip U2, emitter is connected with the emitter of triode VT3, the emitter of triode VT3 also forms the first output terminal of signal after the normally opened contact K-1 of relay K together with the FB pin of flip chip U2, and this first output terminal is then connected with the signal input part of normally closed solenoid valve 3.When sensor-triggered control circuit 73 has signal to input, the FB pin of flip chip U2 exports high level, and that relay K is obtained is electric, at this moment the normally opened contact K-1 of relay K closed make the first normally closed solenoid valve 3 electric and open.In order to better implement the present invention, this flip chip U2 is preferably ACT364 integrated chip.
Meanwhile, another road signal is input to oil suction pump trigger control circuit 75 after signal trimming circuit 74 processes.And this signal trimming circuit 74 is by triode VT4, the diode D6 that P pole is connected with the non-same polarity of telefault L3, N pole is connected with the base stage of triode VT4, the electric capacity C4 that positive pole is connected with the N pole of diode D6, negative pole is connected with the Same Name of Ends of telefault L3, the resistance R9 be in parallel with electric capacity C4, the resistance R10 that one end is connected with the collector of triode VT4, the other end is connected with the Same Name of Ends of telefault L3, and the resistance R11 that one end is connected with resistance R4, the other end is connected with the Same Name of Ends of telefault L3 forms.The emitter of institute triode VT4 is all connected with oil suction pump trigger control circuit 75 with the Same Name of Ends of telefault L3.
Described oil suction pump trigger control circuit 75 is by triode VT5, bidirectional thyristor D9, N pole is connected with the base stage of triode VT5 after resistance R13, the diode D8 that P pole is then connected with the Same Name of Ends of telefault L3 after electric capacity C8, N pole is connected with the P pole of diode D8, the voltage stabilizing diode D7 that P pole is connected with the emitter of triode VT4, the electric capacity C5 be in parallel with voltage stabilizing diode D7, positive pole is connected with the P pole of voltage stabilizing diode D7, the electric capacity C6 that negative pole is connected with the first anode of bidirectional thyristor D9, one end is connected with the P pole of voltage stabilizing diode D7, the resistance R12 that the other end is connected with the base of triode VT5, and positive pole is connected with the emitter of triode VT5, negative pole forms with the electric capacity C7 that the first anode of bidirectional thyristor D9 is connected with second anode simultaneously.The control pole of described bidirectional thyristor D9 is connected with the collector of triode VT5, and the emitter of triode VT5 is connected with the P pole of voltage stabilizing diode D7 and the P pole of diode D5 simultaneously.The FB pin of flip chip U2 and the emitter of triode VT5 then form the second output terminal of signal, and this second output terminal is then connected with the signal input part of oil suction pump 4.When oil suction pump trigger control circuit 75 electric after then start oil suction pump 4.
As mentioned above, just well the present invention can be realized.
Claims (10)
1. based on the engine motor oil thermostatic control system of double-closed-loop control, mainly comprise engine oil tank (1), first temperature sensor (2), first normally closed solenoid valve (3), oil suction pump (4), refrigeratory (5), filtrator (6), control system (7), flowline (8) and oil inlet pipe (9), first oil-in of this refrigeratory (5) is connected with engine oil tank (1) by flowline (8), its first oil-out is then connected with engine oil tank (1) by oil inlet pipe (9), first normally closed solenoid valve (3) is then arranged on flowline (8), and oil suction pump (4) to be arranged on flowline (8) upper and be positioned between the first normally closed solenoid valve (3) and refrigeratory (5), filtrator (6) is arranged on oil inlet pipe (9), first temperature sensor (2) is then arranged on engine oil tank (1) bottom, described first temperature sensor (2), first normally closed solenoid valve (3), oil suction pump (4) is all connected with control system (7), it is characterized in that: also include and be arranged on oil inlet pipe (9) and second temperature sensor (11) of close refrigeratory (5) side, be arranged on oil inlet pipe (9) to go up and the normally open solenoid valve (10) be positioned between filtrator (6) and the second temperature sensor (11), one end is connected with the second oil-out of refrigeratory (5), the circulation pipe (14) that the other end is then connected with the second oil-in of refrigeratory (5), be arranged on the second normally closed solenoid valve (12) on circulation pipe (14), and simultaneously with normally open solenoid valve (10), second temperature sensor (11), the closed-loop control system (13) that second normally closed solenoid valve (12) is connected,
Described closed-loop control system (13) is by control chip U3, field effect transistor Q, triode VT6, one end is connected with the drain electrode of field effect transistor Q, the other end is then in turn through resistance R15, the resistance R14 be connected with the emitter of triode VT6 after electric capacity C9 and resistance R18, N pole is connected with the source electrode of field effect transistor Q, the diode D10 that P pole is then connected with the tie point of electric capacity C9 with resistance R18, positive pole is connected with the CONT pin of control chip U3, the electric capacity C10 that negative pole is connected with the P pole of diode D10, one end is connected with the OUT pin of control chip U3, the resistance R16 that the other end is connected with the grid of field effect transistor Q, N pole is connected with the source electrode of field effect transistor Q, the diode D11 that P pole is connected with the base stage of triode VT6 after resistance R17, positive pole is connected with the P pole of diode D11, negative pole is as the electric capacity C12 of system one output stage, and negative pole is connected with the N pole of diode D11, the electric capacity C11 that positive pole is connected with the collector of triode VT6 forms, the VCC pin of described control chip U3 is all connected with the drain electrode of field effect transistor Q with RESET pin, its THRE pin is all connected with the tie point of resistance R15 with resistance R14 with TRI pin, GND pin ground connection, DIS pin are connected with the collector of triode VT6.
2. the engine motor oil thermostatic control system based on double-closed-loop control according to claim 1, it is characterized in that: described control system (7) is by transformer T, be arranged on the telefault L1 on the former limit of transformer T, be arranged on telefault L2 and the telefault L3 of transformer secondary, the front end signal treatment circuit (71) be connected with telefault L1, the intermediate treatment circuit (72) be connected with telefault L2, the sensor-triggered control circuit (73) be connected with intermediate treatment circuit (72), the signal trimming circuit (74) be connected with telefault L3, and form with the oil suction pump trigger control circuit (75) that signal trimming circuit (74) is connected with sensor-triggered control circuit (73) simultaneously.
3. the engine motor oil thermostatic control system based on double-closed-loop control according to claim 2, it is characterized in that: described front end signal treatment circuit (71) comprises fuse R1, diode bridge rectifier U, electric capacity C1, diode D2, and voltage stabilizing diode D1; The one input pole of diode bridge rectifier U is connected with a signal output part of the first temperature sensor (2) after fuse R1, its another input pole and be then connected with another signal output part of the first temperature sensor (2), the positive pole of electric capacity C1 is connected with cathode output end with the cathode output end of diode bridge rectifier U respectively with negative pole, and the N pole of voltage stabilizing diode D1 is connected with the positive pole of electric capacity C1, its P pole is then connected with the negative pole of electric capacity C1 after diode D2; The Same Name of Ends of described telefault L1 is connected with the positive pole of electric capacity C1, its non-same polarity is connected with the negative pole of electric capacity C1.
4. the engine motor oil thermostatic control system based on double-closed-loop control according to claim 3, it is characterized in that: described intermediate treatment circuit (72) is by triode VT1, unidirectional thyristor D4, N pole is connected with the N pole of unidirectional thyristor D4, the diode D3 that P pole is then connected with the non-same polarity of telefault L2, the resistance R2 be in parallel with diode D3, positive pole is connected with the N pole of diode D3, the electric capacity C2 that negative pole is then connected with the P pole of unidirectional thyristor D4, one end is connected with the N pole of unidirectional thyristor D4, the inductance L 4 that the other end is connected with the emitter of triode VT1, one end is connected with the control pole of unidirectional thyristor D4, the resistance R3 that the other end is connected with the base stage of triode VT1, and one end is connected with the base stage of triode VT1, the resistance R4 that the other end is connected with signal trimming circuit (74) forms, the P pole of described unidirectional thyristor D4 is connected with the Same Name of Ends of telefault L2, and the emitter and collector of triode VT1 is all connected with sensor-triggered control circuit (73), base stage is connected with the P pole of unidirectional thyristor D4.
5. the engine motor oil thermostatic control system based on double-closed-loop control according to claim 4, it is characterized in that: described sensor-triggered control circuit (73) is by flip chip U2, triode VT2, triode VT3, one end is connected with the collector of triode VT1, the resistance R5 that the other end is connected with the VDD pin of flip chip U2, positive pole is connected with the collector of triode VT1, the electric capacity C3 that negative pole is then connected with the FB pin of flip chip U2 after relay K, N pole is connected with the base stage of triode VT3 after resistance R7, the diode D5 that P pole is connected with tie point and the oil suction pump trigger control circuit (75) of relay K with electric capacity C3 simultaneously, one end is connected with the CS pin of flip chip U2, the resistance R8 that the other end is connected with the P pole of diode D5, and the resistance R6 be serially connected between the base stage of triode VT2 and emitter forms, the BD pin of described flip chip U2 is connected with the emitter of triode VT1, GND pin ground connection, FB pin are connected with the collector of triode VT3, the base stage of triode VT2 is connected with the BD pin of flip chip U2, collector is connected with the SW pin of flip chip U2, emitter is connected with the emitter of triode VT3, an emitter also signal output stage after the normally opened contact K-1 of relay K of triode VT3.
6. the engine motor oil thermostatic control system based on double-closed-loop control according to claim 5, it is characterized in that: described signal trimming circuit (74) is by triode VT4, P pole is connected with the non-same polarity of telefault L3, the diode D6 that N pole is connected with the base stage of triode VT4, positive pole is connected with the N pole of diode D6, the electric capacity C4 that negative pole is connected with the Same Name of Ends of telefault L3, the resistance R9 be in parallel with electric capacity C4, one end is connected with the collector of triode VT4, the resistance R10 that the other end is connected with the Same Name of Ends of telefault L3, and one end is connected with resistance R4, the resistance R11 that the other end is connected with the Same Name of Ends of telefault L3 forms, the emitter of institute triode VT4 is all connected with oil suction pump trigger control circuit (75) with the Same Name of Ends of telefault L3.
7. the engine motor oil thermostatic control system based on double-closed-loop control according to claim 6, it is characterized in that: described oil suction pump trigger control circuit (75) is by triode VT5, bidirectional thyristor D9, N pole is connected with the base stage of triode VT5 after resistance R13, the diode D8 that P pole is then connected with the Same Name of Ends of telefault L3 after electric capacity C8, N pole is connected with the P pole of diode D8, the voltage stabilizing diode D7 that P pole is connected with the emitter of triode VT4, the electric capacity C5 be in parallel with voltage stabilizing diode D7, positive pole is connected with the P pole of voltage stabilizing diode D7, the electric capacity C6 that negative pole is connected with the first anode of bidirectional thyristor D9, one end is connected with the P pole of voltage stabilizing diode D7, the resistance R12 that the other end is connected with the base of triode VT5, and positive pole is connected with the emitter of triode VT5, negative pole forms with the electric capacity C7 that the first anode of bidirectional thyristor D9 is connected with second anode simultaneously, the control pole of described bidirectional thyristor D9 is connected with the collector of triode VT5, and the emitter of triode VT5 is connected with the P pole of voltage stabilizing diode D7 and the P pole of diode D5 simultaneously.
8. the engine motor oil thermostatic control system based on double-closed-loop control according to any one of claim 5 ~ 7, is characterized in that: described flip chip U2 is ACT364 integrated chip.
9. the engine motor oil thermostatic control system based on double-closed-loop control according to claim 7, is characterized in that: described control chip U3 is NE555 integrated circuit.
10. the engine motor oil thermostatic control system based on double-closed-loop control according to any one of claim 1 ~ 7, is characterized in that: described the first temperature sensor (2) and the second temperature sensor (11) are BD-WZP-PT100 type oil temperature sensor.
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| CN201510173664.2A CN104807647A (en) | 2015-04-13 | 2015-04-13 | Dual closed-loop-based engine oil constant-temperature control system |
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Application publication date: 20150729 |