CN104847444A - High-stability engine oil constant temperature automatic control system - Google Patents
High-stability engine oil constant temperature automatic control system Download PDFInfo
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- CN104847444A CN104847444A CN201510173651.5A CN201510173651A CN104847444A CN 104847444 A CN104847444 A CN 104847444A CN 201510173651 A CN201510173651 A CN 201510173651A CN 104847444 A CN104847444 A CN 104847444A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
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Abstract
The invention discloses a high-stability engine oil constant temperature automatic control system. The high-stability engine oil constant temperature automatic control system comprises an engine oil tank (1), a first temperature sensor (2), a first normally closed solenoid 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 solenoid valve (10), a circulating pipe (14), a second normally closed solenoid valve (12), a closed-loop control system (13) and a temperature signal processing system (15). The high-stability engine oil constant temperature automatic control system is provided with the temperature signal processing system, so that the fidelity of temperature signals transmitted to the closed-loop control system is higher by use of the temperature signal processing system, and temperature control precision is improved.
Description
Technical field
The present invention relates to Engine Block Test field, specifically refer to a kind of high stability engine motor oil constant-temperature automatic control system.
Background technique
People improve constantly the reliability of automobile, the requirement of the aspect such as Security and green, and motor is as the heart component of automobile, its technical merit directly has influence on the performance index such as its power character, 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 work, therefore engine performance measuring is more and more subject to people's attention.
Motor is when testing, and each moving element all needs oil lubricating, and therefore all motors are equipped with lubrication system.By oil pump, high-pressure oil is transported to each kinematic pair through oil duct and carries out pressure lubrication, also some kinematic pair is by machine oil splash 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 high stability engine motor oil constant-temperature automatic control system is provided.
Object of the present invention is by following technical proposals reality: a kind of high stability engine motor oil constant-temperature automatic control system, comprises engine oil tank, the first temperature transducer, first normally closed solenoid valve, oil scavenge pump, cooler, filter, control system, oil outlet tube, oil inlet pipe, normally open solenoid valve, second temperature transducer, the second normally closed solenoid valve, closed loop control system; First filler opening of this cooler is connected with engine oil tank by oil outlet tube, its first oil outlet is then connected with engine oil tank by oil inlet pipe, first normally closed solenoid valve is then arranged on oil outlet tube, and oil scavenge pump to be arranged on oil outlet tube and between the first normally closed solenoid valve and cooler, filter is arranged on oil inlet pipe, first temperature transducer is then arranged on bottom engine oil tank, and described first temperature transducer, the first normally closed solenoid valve, oil scavenge pump are all connected with control system; And the second temperature transducer is arranged on oil inlet pipe and close cooler side, normally open solenoid valve to be arranged on oil inlet pipe and between filter and the second temperature transducer, one end of Circulation pipe is connected with the second oil outlet of cooler, the other end is then connected with the second filler opening of cooler, and the second normally closed solenoid valve is then arranged on Circulation pipe.Closed loop control system is connected with normally open solenoid valve, the second normally closed solenoid valve simultaneously.The present invention is also provided with processes temperature signal system, and its input end is connected with the second temperature transducer, and output terminal is connected with closed loop control system.
Further, described processes temperature signal system is by triode VT7, triode VT8, unidirectional thyristor D14, AND NOT gate P1, AND NOT gate P2, P pole is connected with the P pole of unidirectional thyristor D14, the diode D12 that N pole is connected with the base stage of triode VT7 after electric capacity C13, one end is connected with the emitter of triode VT7, the resistance R20 that the other end is connected with the P pole of diode D12, the electric capacity C15 be in parallel with resistance R20, N pole is connected with the P pole of unidirectional thyristor D14, the diode D13 that P pole is connected with the emitter of triode VT8, be serially connected in the electric capacity C16 between the control pole of unidirectional thyristor D14 and P pole, negative pole is connected with the base stage of triode VT8, the electric capacity C14 that positive pole is connected with the collector electrode of triode VT8 after resistance R19, be serially connected in the resistance R21 between the normal phase input end of AND NOT gate P1 and output terminal, and one end is connected with the output terminal of AND NOT gate P1, the resistance R22 that the other end is connected with the control pole of unidirectional thyristor D14 forms, the collector electrode of described triode VT7 is connected with the tie point of electric capacity C14 with resistance R19, the collector electrode of triode VT8 is connected with the normal phase input end of AND NOT gate P1, reverse inter-input-ing ending grounding, its output terminal of AND NOT gate P1 are also connected with the N pole of unidirectional thyristor D14, and the inverting input of AND NOT gate P2 is connected with the output terminal of AND NOT gate P1, positive input end grounding.
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 electrode 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 electrode of triode VT6.
Described control system is by transformer T, be arranged on the inductance coil L1 on the former limit of transformer T, be arranged on inductance coil L2 and the inductance coil L3 of transformer secondary, the front end signal processing circuit be connected with inductance coil L1, the intermediate treatment circuit be connected with inductance coil L2, the sensor-triggered control circuit be connected with intermediate treatment circuit, the signal trimming circuit be connected with inductance coil L3, and form with the oil scavenge pump trigger control circuit that signal trimming circuit is connected with sensor-triggered control circuit simultaneously.
Described front end signal processing circuit comprises fus R1, diode bridge rectifier U, electric capacity C1, diode D2, and reference diode D1; One input end of diode bridge rectifier U is connected with a signal output part of the first temperature transducer after fus R1, its another input end is then connected with another signal output part of the first temperature transducer, 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 reference 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 inductance coil 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 inductance coil 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 inductance coil 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 electrode 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 electrode 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 scavenge 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 electrode of triode VT3, the base stage of triode VT2 is connected with the BD pin of flip chip U2, collector electrode 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 inductance coil 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 inductance coil L3, the resistance R9 be in parallel with electric capacity C4, the resistance R10 that one end is connected with the collector electrode of triode VT4, the other end is connected with the Same Name of Ends of inductance coil 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 inductance coil L3 forms; The emitter of institute triode VT4 is all connected with oil scavenge pump trigger control circuit with the Same Name of Ends of inductance coil L3.
Described oil scavenge 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 inductance coil L3 after electric capacity C8, N pole is connected with the P pole of diode D8, the reference diode D7 that P pole is connected with the emitter of triode VT4, the electric capacity C5 be in parallel with reference diode D7, one end is connected with the P pole of reference diode D7, the electric capacity C6 that the other end is connected with the first anode of bidirectional thyristor D9, one end is connected with the P pole of reference 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 plate simultaneously, the control pole of described bidirectional thyristor D9 is connected with the collector electrode of triode VT5, and the emitter of triode VT5 is connected with the P pole of reference diode D7 and the P pole of diode D5 simultaneously.
Described flip chip U2 is ACT364 integrated chip, and control chip U3 is NE555 intergrated circuit.
The present invention compared with prior art has the following advantages and beneficial effect:
1, the present invention is provided with processes temperature signal system, makes the temperature signal fidelity flowing to closed loop control system higher by the effect of this processes temperature signal system, thus improves accuracy of temperature control.
2, processes temperature signal system architecture of the present invention is simple, and the electronic component used is with low cost.
3, temperature transducer 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 overall structure schematic diagram of the present invention;
Fig. 2 is processes temperature signal circuit system structural representation of the present invention;
Fig. 3 is closed loop control system electrical block diagram of the present invention;
Fig. 4 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 transducer 2, first normally closed solenoid valve 3, oil scavenge pump 4, cooler 5, filter 6, control system 7, oil outlet tube 8, oil inlet pipe 9, second temperature transducer 11, normally open solenoid valve 10, Circulation pipe 14, second normally closed solenoid valve 12, closed loop control system 13.First filler opening of this cooler 5 is connected with engine oil tank 1 by oil outlet tube 8, so that the high temperature oil in engine oil tank 1 can be input in cooler 5 by oil outlet tube 8.First oil outlet of cooler 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 cooler 5.First normally closed solenoid valve 3 is arranged on oil outlet tube 8, and oil scavenge pump 4 to be arranged on oil outlet tube 8 and between the first normally closed solenoid valve 3 and cooler 5.Filter 6 is arranged on oil inlet pipe 9, and the first temperature transducer 2 is arranged on bottom engine oil tank 1, and described first temperature transducer 2, first normally closed solenoid valve 3, oil scavenge pump 4 are all connected with control system 7.Second temperature transducer 11 is then arranged on the oil inlet pipe 9 and side of close cooler 5, normally open solenoid valve 10 to be arranged on oil inlet pipe 9 and between filter 6 and the second temperature transducer 11, one end of Circulation pipe 14 is connected with the second oil outlet of cooler 5, the other end is then connected with the second filler opening of cooler 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 normally closed solenoid valve 12 simultaneously.In order to realize object of the present invention, the present invention is also provided with processes temperature signal system 15, and its input end is connected with the second temperature transducer 11, and output terminal is connected with closed loop control system 13.This processes temperature signal system 15 can process the temperature signal that the second temperature transducer 11 collects, and makes the temperature signal fidelity being input to closed loop control system 13 higher.
First temperature transducer 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 transducer 2 sends a signal to control system 7, controls the first normally closed solenoid valve 3 to open and oil scavenge pump 4 starts by control system 7.At this moment, the high temperature oil in engine oil tank 1 is then transported to cooler 5 by oil outlet tube 8 and carries out really cold.In the process the second temperature transducer 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 be also above 80 DEG C, at this moment the second temperature transducer 11 can send a signal to processes temperature signal system 15, this temperature signal sends closed loop control system 13 again to after processes temperature signal system 15 processes, control normally open solenoid valve 10 by closed loop control system 13 to close, second normally closed solenoid valve 12 is opened, machine oil then can again flow into cooler 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 transducer 11 also adopts Bo electricity Science and Technology Ltd. of Shenzhen to produce realizes.
In the present invention, processes temperature signal system 15 is emphasis places, as shown in Figure 2, it is by triode VT7, triode VT8, unidirectional thyristor D14, AND NOT gate P1, AND NOT gate P2, P pole is connected with the P pole of unidirectional thyristor D14, the diode D12 that N pole is connected with the base stage of triode VT7 after electric capacity C13, one end is connected with the emitter of triode VT7, the resistance R20 that the other end is connected with the P pole of diode D12, the electric capacity C15 be in parallel with resistance R20, N pole is connected with the P pole of unidirectional thyristor D14, the diode D13 that P pole is connected with the emitter of triode VT8, be serially connected in the electric capacity C16 between the control pole of unidirectional thyristor D14 and P pole, negative pole is connected with the base stage of triode VT8, the electric capacity C14 that positive pole is connected with the collector electrode of triode VT8 after resistance R19, be serially connected in the resistance R21 between the normal phase input end of AND NOT gate P1 and output terminal, and one end is connected with the output terminal of AND NOT gate P1, the resistance R22 that the other end is connected with the control pole of unidirectional thyristor D14 forms.The collector electrode of described triode VT7 is connected with the tie point of electric capacity C14 with resistance R19, the collector electrode of triode VT8 is connected with the normal phase input end of AND NOT gate P1, reverse inter-input-ing ending grounding, its output terminal of AND NOT gate P1 are also connected with the N pole of unidirectional thyristor D14, and the inverting input of AND NOT gate P2 is connected with the output terminal of AND NOT gate P1, positive input end grounding.The N pole of unidirectional thyristor D14 is connected with outside 5V voltage.And the N pole of diode D12 is as signal input part, it is connected with the signal output part of the second temperature transducer 11, and the output terminal then signal output terminal of AND NOT gate P2, it is connected with the signal input part of closed loop control system 13.
As shown in Figure 3, 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 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 electrode 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 electrode 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 transducer 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 intergrated circuit.
As shown in Figure 4, this control system 7 is by transformer T, be arranged on the inductance coil L1 on the former limit of transformer T, be arranged on inductance coil L2 and the inductance coil L3 of transformer secondary, the front end signal processing circuit 71 be connected with inductance coil L1, the intermediate treatment circuit 72 be connected with inductance coil L2, the sensor-triggered control circuit 73 be connected with intermediate treatment circuit 72, the signal trimming circuit 74 be connected with inductance coil L3, and form with the oil scavenge pump trigger control circuit 75 that signal trimming circuit 74 is connected with sensor-triggered control circuit 73 simultaneously.
And front end signal processing circuit 71 wherein comprises fus R1, diode bridge rectifier U, electric capacity C1, diode D2, and reference diode D1.During connection, one input end of diode bridge rectifier U is connected with a signal output part of the first temperature transducer 2 after fus R1, its another input end is then connected with another signal output part of the first temperature transducer 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 reference 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 inductance coil 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 transducer 2 sends carries out boosting by transformer T again and processes after diode bridge rectifier U rectification, electric capacity C1 filtering and reference 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 inductance coil 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 inductance coil 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 electrode 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 electrode 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 scavenge 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 electrode of triode VT3, the base stage of triode VT2 is connected with the BD pin of flip chip U2, collector electrode 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 scavenge 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 inductance coil 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 inductance coil L3, the resistance R9 be in parallel with electric capacity C4, the resistance R10 that one end is connected with the collector electrode of triode VT4, the other end is connected with the Same Name of Ends of inductance coil 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 inductance coil L3 forms.The emitter of institute triode VT4 is all connected with oil scavenge pump trigger control circuit 75 with the Same Name of Ends of inductance coil L3.
Described oil scavenge 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 inductance coil L3 after electric capacity C8, N pole is connected with the P pole of diode D8, the reference diode D7 that P pole is connected with the emitter of triode VT4, the electric capacity C5 be in parallel with reference diode D7, one end is connected with the P pole of reference diode D7, the electric capacity C6 that the other end is connected with the first anode of bidirectional thyristor D9, one end is connected with the P pole of reference 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 plate simultaneously.The control pole of described bidirectional thyristor D9 is connected with the collector electrode of triode VT5, and the emitter of triode VT5 is connected with the P pole of reference 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 scavenge pump 4.When oil scavenge pump trigger control circuit 75 electric after then start oil scavenge pump 4.
As mentioned above, just well the present invention can be realized.
Claims (10)
1. a high stability engine motor oil constant-temperature automatic control system, mainly comprises engine oil tank (1), the first temperature transducer (2), first normally closed solenoid valve (3), oil scavenge pump (4), cooler (5), filter (6), control system (7), oil outlet tube (8), oil inlet pipe (9), normally open solenoid valve (10), second temperature transducer (11), the second normally closed solenoid valve (12), closed loop control system (13), first filler opening of this cooler (5) is connected with engine oil tank (1) by oil outlet tube (8), its first oil outlet is then connected with engine oil tank (1) by oil inlet pipe (9), first normally closed solenoid valve (3) is then arranged on oil outlet tube (8), and oil scavenge pump (4) to be arranged on oil outlet tube (8) upper and be positioned between the first normally closed solenoid valve (3) and cooler (5), filter (6) is arranged on oil inlet pipe (9), first temperature transducer (2) is then arranged on engine oil tank (1) bottom, described first temperature transducer (2), first normally closed solenoid valve (3), oil scavenge pump (4) is all connected with control system (7), and the second temperature transducer (11) is arranged on oil inlet pipe (9) and close cooler (5) side, normally open solenoid valve (10) is arranged on oil inlet pipe (9) and goes up and be positioned between filter (6) and the second temperature transducer (11), one end of Circulation pipe (14) is connected with the second oil outlet of cooler (5), the other end is then connected with the second filler opening of cooler (5), second normally closed solenoid valve (12) is then arranged on Circulation pipe (14), with normally open solenoid valve (10) while of closed loop control system (13), second normally closed solenoid valve (12) is connected, it is characterized in that: also include processes temperature signal system (15), the input end of this processes temperature signal system (15) is connected with the output terminal of temperature transducer (11), its output terminal is then connected with the input end of closed loop control system (13),
Described processes temperature signal system (15) is by triode VT7, triode VT8, unidirectional thyristor D14, AND NOT gate P1, AND NOT gate P2, P pole is connected with the P pole of unidirectional thyristor D14, the diode D12 that N pole is connected with the base stage of triode VT7 after electric capacity C13, one end is connected with the emitter of triode VT7, the resistance R20 that the other end is connected with the P pole of diode D12, the electric capacity C15 be in parallel with resistance R20, N pole is connected with the P pole of unidirectional thyristor D14, the diode D13 that P pole is connected with the emitter of triode VT8, be serially connected in the electric capacity C16 between the control pole of unidirectional thyristor D14 and P pole, negative pole is connected with the base stage of triode VT8, the electric capacity C14 that positive pole is connected with the collector electrode of triode VT8 after resistance R19, be serially connected in the resistance R21 between the normal phase input end of AND NOT gate P1 and output terminal, and one end is connected with the output terminal of AND NOT gate P1, the resistance R22 that the other end is connected with the control pole of unidirectional thyristor D14 forms, the collector electrode of described triode VT7 is connected with the tie point of electric capacity C14 with resistance R19, the collector electrode of triode VT8 is connected with the normal phase input end of AND NOT gate P1, reverse inter-input-ing ending grounding, its output terminal of AND NOT gate P1 are also connected with the N pole of unidirectional thyristor D14, and the inverting input of AND NOT gate P2 is connected with the output terminal of AND NOT gate P1, positive input end grounding.
2. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 1, it is characterized in that: 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 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 electrode 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 electrode of triode VT6.
3. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 2, it is characterized in that: described control system (7) is by transformer T, be arranged on the inductance coil L1 on the former limit of transformer T, be arranged on inductance coil L2 and the inductance coil L3 of transformer secondary, the front end signal processing circuit (71) be connected with inductance coil L1, the intermediate treatment circuit (72) be connected with inductance coil L2, the sensor-triggered control circuit (73) be connected with intermediate treatment circuit (72), the signal trimming circuit (74) be connected with inductance coil L3, and form with the oil scavenge pump trigger control circuit (75) that signal trimming circuit (74) is connected with sensor-triggered control circuit (73) simultaneously.
4. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 3, it is characterized in that: described front end signal processing circuit (71) comprises fus R1, diode bridge rectifier U, electric capacity C1, diode D2, and reference diode D1; One input end of diode bridge rectifier U is connected with a signal output part of the first temperature transducer (2) after fus R1, its another input end is then connected with another signal output part of the first temperature transducer (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 reference 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 inductance coil 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.
5. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 4, 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 inductance coil 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 inductance coil 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.
6. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 5, 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 electrode 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 electrode 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 scavenge 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 electrode of triode VT3, the base stage of triode VT2 is connected with the BD pin of flip chip U2, collector electrode 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.
7. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 6, it is characterized in that: described signal trimming circuit (74) is by triode VT4, P pole is connected with the non-same polarity of inductance coil 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 inductance coil L3, the resistance R9 be in parallel with electric capacity C4, one end is connected with the collector electrode of triode VT4, the resistance R10 that the other end is connected with the Same Name of Ends of inductance coil 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 inductance coil L3 forms, the emitter of institute triode VT4 is all connected with oil scavenge pump trigger control circuit (75) with the Same Name of Ends of inductance coil L3.
8. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 7, it is characterized in that: described oil scavenge 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 inductance coil L3 after electric capacity C8, N pole is connected with the P pole of diode D8, the reference diode D7 that P pole is connected with the emitter of triode VT4, the electric capacity C5 be in parallel with reference diode D7, one end is connected with the P pole of reference diode D7, the electric capacity C6 that the other end is connected with the first anode of bidirectional thyristor D9, one end is connected with the P pole of reference 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 plate simultaneously, the control pole of described bidirectional thyristor D9 is connected with the collector electrode of triode VT5, and the emitter of triode VT5 is connected with the P pole of reference diode D7 and the P pole of diode D5 simultaneously.
9. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 8, is characterized in that: described flip chip U2 is ACT364 integrated chip.
10. a kind of high stability engine motor oil constant-temperature automatic control system according to claim 8, is characterized in that: described control chip U3 is NE555 intergrated circuit.
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