CN201250738Y - Oil pump controlling circuit - Google Patents
Oil pump controlling circuit Download PDFInfo
- Publication number
- CN201250738Y CN201250738Y CNU2008200996506U CN200820099650U CN201250738Y CN 201250738 Y CN201250738 Y CN 201250738Y CN U2008200996506 U CNU2008200996506 U CN U2008200996506U CN 200820099650 U CN200820099650 U CN 200820099650U CN 201250738 Y CN201250738 Y CN 201250738Y
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- Prior art keywords
- circuit
- comparator
- oil pump
- switching tube
- signal
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Abstract
The utility model discloses an oil pump controlling circuit, comprising a signal-collecting circuit, a signal-forming circuit, and a protection circuit, which is characterized in that the signal-forming circuit is composed of a gate driven circuit and an MOS magnified circuit, wherein start-up direction is obtained by the signal-collecting circuit and is transmitted to the gate driven circuit, the start-up direction is formed by the gate driven circuit and then is transmitted to the MOS magnified circuit which magnifies the start-up direction, and start-up signal is generated. The MOS magnified circuit is provided with an on-off pipe, the start-up direction is transmitted by a drain of the on-off pipe to the protection circuit. The oil pump controlling circuit has the advantages that the cost is reduced, the heat is low, electric arc is effectively prevented, surge electrical current is reduced and protection measures are strengthened, the oil pump controlling circuit provides an effective protection of safe operation of the oil pump. And the oil pump controlling circuit can be equipped outside the ECU, heat-radiating burden of ECU is reduced, and the working efficiency of ECU is increased.
Description
Technical field
The utility model belongs to technical field of motorcycles, specifically, is a kind of oil pump control circuit of motorcycle.
Background technique
The oil driving mode of pump control circuit of motorcycle with electronic fuel injection system mainly contains two kinds at present:
A kind of by signal acquisition circuit; signal transformation circuit and protective circuit are formed; wherein signal acquisition circuit obtains the pump start instruction of ECU output and flows to signal transformation circuit; signal transformation circuit instructs shaping to pump start; and send to protective circuit; protective circuit generally adopts relay to realize that signal amplifies, and the direct output signal of relay drives oil pump work.Its shortcoming is: the inrush current of relay is bigger, causes the injury to the oil pump circuit easily, and the relay life-span is short, and the cost height influences the reliability of whole oil pump control circuit.
Second kind of oil pump control circuit is that signal acquisition circuit and signal transformation circuit are integrated in the ECU, pump start instruction behind the ECU output Shaping, replace relay as dc switch by semiconductor, output signal drives oil pump work, than first kind of mode, has improved the reliability of whole oil pump control circuit, but its shortcoming is: adopt integrated chip can take the ECU computational space in ECU, increase the heat radiation burden of ECU, reduce the working efficiency of ECU, and cost is higher.
The model utility content
The purpose of this utility model provides the high oil pump control circuit of a kind of reliability, and it is low to have a cost, and the characteristics of high safety can be saved the ECU computational space, improves the working efficiency of ECU.
For achieving the above object, the utility model is explained a kind of oil pump control circuit, comprise signal acquisition circuit, signal transformation circuit and protective circuit, its key is: described signal transformation circuit is made up of gate drive circuit and metal-oxide-semiconductor amplification circuit, wherein said signal acquisition circuit obtains the pump start instruction and flows to described gate drive circuit, this gate drive circuit instructs shaping to pump start, and send to described metal-oxide-semiconductor amplification circuit, this metal-oxide-semiconductor amplification circuit amplifies described pump start instruction back and generates drive signal, and export this drive signal and give described protective circuit, this protective circuit output oil pump drive signal;
Described metal-oxide-semiconductor amplification circuit is provided with switching tube, and the grid of this switching tube connects the output terminal of described gate drive circuit, and source electrode is connected in series ground connection behind first resistance, and the described pump start of drain electrode output instructs to described protective circuit; Described metal-oxide-semiconductor amplification circuit is connected with temperature protection circuit, over-current protection circuit and no-load protection circuit;
Use cheap metal-oxide-semiconductor to do the oil pump driver module, can reduce cost, and can be installed in outside the ECU, save the ECU computational space, reduce ECU heat radiation burden, improve the working efficiency of ECU.
Metal-oxide-semiconductor conducting internal resistance has only tens milliohms, and it is little to generate heat, and can prevent effectively that electric arc from producing.Utilize peripheral devices, also can maximum reduce the generation of inrush current, and increase various safety measure, for the oil pump safe operation provides effective guarantee.
Described temperature protection circuit is provided with thermistor, this thermistor is encapsulated on the pipe shaft of described switching tube, one end ground connection of thermistor, connect positive supply behind the other end string divider resistance, the common port of thermistor and divider resistance is connected the reverse input end of hot comparator, the positive input of this hot comparator is connected on the movable tap of first adjustable resistance, a fixed taps of this first adjustable resistance connects positive supply, another fixed taps crosstalk resistance back ground connection, the negative pole of the output termination high temperature diode of described hot comparator, the positive pole of this high diode temperature connects the grid of described switching tube;
Thermistor is the thermistor of positive temperature coefficient, by adjusting the dividing point of first adjustable resistance, and can thermotropism comparator output temperature reference value.When the operating temperature of switching tube excessive, the high temperature signal of hot comparator output terminal output low level, and drag down the grid potential of switching tube, switching tube quits work, and realizes the protection to switching tube.
Described over-current protection circuit is provided with the overcurrent comparator, the positive input of this overcurrent comparator is connected on the movable tap of second adjustable resistance, one fixed end ground connection of this second adjustable resistance, connect positive supply after another fixed end crosstalk resistance, the reverse input end of described overcurrent comparator is connected on the source electrode of described switching tube, the output terminal of described overcurrent comparator is taken over the negative pole of stream diode, and the positive pole of this overcurrent diode connects the grid of described switching tube;
Adjust the dividing point of second adjustable resistance, can be to overcurrent comparator output current reference value.When the operating current of oil pump and switching tube excessive; first resistance improves the current potential of overcurrent comparator reverse input end, the over-current signal of overcurrent comparator output terminal output low level, and drag down the grid potential of switching tube; switching tube quits work, and realizes the protection to oil pump and switching tube.
Described no-load protection circuit is provided with unloaded comparator, the positive input of this zero load comparator is connected on the source electrode of described switching tube, the reverse input end of this zero load comparator is connected on the movable tap of the 3rd adjustable resistance, one fixed end ground connection of the 3rd adjustable resistance connects positive supply after another fixed end crosstalk resistance; The negative pole of the unloaded diode of the output termination of described unloaded comparator, the positive pole of this zero load diode connects the grid of described switching tube.
Adjust the dividing point of the 3rd adjustable resistance, can be to unloaded comparator output current reference value.When the oil pump zero load, the operating current of oil pump and switching tube is too small, the current potential of the low unloaded comparator positive input of first resistance drop; the airborne signals of unloaded comparator output terminal output low level; and dragging down the grid potential of switching tube, switching tube quits work, and realizes the protection to oil pump.
Described gate drive circuit is made up of first not gate and second not gate, and wherein the input end of first not gate receives described pump start instruction, and output terminal connects the input end of described second not gate, and the output terminal of second not gate connects described metal-oxide-semiconductor amplification circuit.
Not circuit is adjusted the waveform of command signal, has strengthened the antijamming capability of circuit, has improved the reliability of signal.
Described signal acquisition circuit is made up of first electric capacity and voltage-stabiliser tube, the negative terminal of first electric capacity and the negativing ending grounding of voltage-stabiliser tube, the anode of first electric capacity and the anode of voltage-stabiliser tube receive described pump start instruction, and export this pump start and instruct to described signal transformation circuit.
Described protective circuit is made up of the output voltage-stabiliser tube and second electric capacity, the negativing ending grounding of the negative terminal of second electric capacity and output voltage-stabiliser tube, and the anode of the anode of second electric capacity and output voltage-stabiliser tube receives described pump start instruction, and output oil pump drive signal.
The antijamming capability of first electric capacity, voltage-stabiliser tube and output voltage-stabiliser tube, the second electric capacity intensifier circuit.
Remarkable result of the present utility model is: provide a kind of stability high oil pump control circuit, use cheap metal-oxide-semiconductor to do the oil pump driver module, reduced cost, metal-oxide-semiconductor conducting internal resistance has only tens milliohms, and it is little to generate heat, and can prevent effectively that electric arc from producing.Utilize peripheral circuit, reduced the generation of inrush current, and increase various safety measure, for the oil pump safe operation provides effective guarantee.And can be installed in outside the ECU, reduce ECU heat radiation burden, improve the working efficiency of ECU., overcurrent too high when the switching tube temperature or when unloaded can also send corresponding trouble signal, and the control switch pipe quits work, and plays the protection to switching tube and oil pump.
Description of drawings
Fig. 1 is the utility model working principle block diagram;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As Fig. 1, shown in 2: a kind of oil pump control circuit, by signal acquisition circuit 1, signal transformation circuit, protective circuit 2, temperature protection circuit, over-current protection circuit and no-load protection circuit are formed, wherein said signal transformation circuit is made up of gate drive circuit 3 and metal-oxide-semiconductor amplification circuit 4, wherein said signal acquisition circuit 1 obtains the pump start instruction and flows to described gate drive circuit 3,3 pairs of pump start instructions of this gate drive circuit shaping, and send to described metal-oxide-semiconductor amplification circuit 4, this metal-oxide-semiconductor amplification circuit 4 amplifies described pump start instruction back and generates drive signal, and export this drive signal and give described protective circuit 2, these protective circuit 2 output oil pump drive signals;
Described metal-oxide-semiconductor amplification circuit 4 is provided with switching tube Q, and the grid of this switching tube Q connects the output terminal of described gate drive circuit 3, and source electrode is connected in series first resistance R, 1 back ground connection, and the described pump start of drain electrode output instructs to described protective circuit 2; Described metal-oxide-semiconductor amplification circuit 4 connects described temperature protection circuit, over-current protection circuit and no-load protection circuit;
Use cheap metal-oxide-semiconductor to do the oil pump driver module, can reduce cost, and can be installed in outside the ECU, save the ECU computational space, reduce ECU heat radiation burden, improve the working efficiency of ECU.
Metal-oxide-semiconductor conducting internal resistance has only tens milliohms, and it is little to generate heat, and can prevent effectively that electric arc from producing.Utilize peripheral devices, also can maximum reduce the generation of inrush current, and increase various safety measure, for the oil pump safe operation provides effective guarantee.
Described temperature protection circuit is provided with thermistor R2, this thermistor R2 is encapsulated on the pipe shaft of described switching tube Q, the end ground connection of thermistor R2, connect positive supply behind the other end string divider resistance R3, the common port of thermistor R2 and divider resistance R3 is connected the reverse input end of hot comparator U3, the positive input of this hot comparator U3 is connected on the movable tap of the first adjustable resistance R6, the fixed taps of this first adjustable resistance R6 connects positive supply, another fixed taps crosstalk resistance back ground connection, the negative pole of the output termination high temperature diode D6 of described hot comparator U3, the positive pole of this high diode temperature D6 connects the grid of described switching tube Q;
Thermistor R2 is the thermistor of positive temperature coefficient, by adjusting the dividing point of the first adjustable resistance R6, and can thermotropism comparator U3 output temperature reference value.When the operating temperature of switching tube Q excessive, the high temperature signal of hot comparator U3 output terminal output low level, and drag down the grid potential of switching tube Q, switching tube Q quits work, and realizes the protection to switching tube Q.
Described over-current protection circuit is provided with overcurrent comparator U4, the positive input of this overcurrent comparator U4 is connected on the movable tap of the second adjustable resistance R4, the fixed end ground connection of this second adjustable resistance R4, connect positive supply after another fixed end crosstalk resistance, the reverse input end of described overcurrent comparator U4 is connected on the source electrode of described switching tube Q, the output terminal of described overcurrent comparator U4 is taken over the negative pole of stream diode D7, and the positive pole of this overcurrent diode D7 connects the grid of described switching tube Q;
Adjust the dividing point of the second adjustable resistance R4, can be to overcurrent comparator U4 output current reference value.When the operating current of oil pump and switching tube Q excessive; first resistance R 1 improves the current potential of overcurrent comparator U4 reverse input end, the over-current signal of overcurrent comparator U4 output terminal output low level, and drag down the grid potential of switching tube Q; switching tube Q quits work, and realizes the protection to oil pump and switching tube Q.
Described no-load protection circuit is provided with unloaded comparator U5, the positive input of this zero load comparator U5 is connected on the source electrode of described switching tube Q, the reverse input end of this zero load comparator U5 is connected on the movable tap of the 3rd adjustable resistance R5, the fixed end ground connection of the 3rd adjustable resistance R5 connects positive supply after another fixed end crosstalk resistance; The negative pole of the unloaded diode D8 of the output termination of described unloaded comparator U5, the positive pole of this zero load diode D8 connects the grid of described switching tube Q.
Adjust the dividing point of the 3rd adjustable resistance R5, can be to unloaded comparator U5 output current reference value.When the oil pump zero load, the operating current of oil pump and switching tube Q is too small, and first resistance R 1 reduces the current potential of unloaded comparator U5 positive input; the airborne signals of unloaded comparator U5 output terminal output low level; and dragging down the grid potential of switching tube Q, switching tube Q quits work, and realizes the protection to oil pump.
Described gate drive circuit 3 is made up of the first not gate U1 and the second not gate U2, wherein the input end of the first not gate U1 receives described pump start instruction, output terminal connects the input end of the described second not gate U2, and the output terminal of the second not gate U2 connects described metal-oxide-semiconductor amplification circuit 4.
Not circuit is adjusted the waveform of command signal, has strengthened the antijamming capability of circuit, has improved the reliability of signal.When the pump start instruction of ECU output is low level signal, adopt single not gate to drive; When the pump start instruction of ECU output is high level signal, adopt two not gates to drive
Described signal acquisition circuit 1 is made up of first electric capacity and voltage-stabiliser tube, the negative terminal of first electric capacity and the negativing ending grounding of voltage-stabiliser tube, the anode of first electric capacity and the anode of voltage-stabiliser tube receive described pump start instruction, and export this pump start and instruct to described signal transformation circuit.
Described protective circuit 2 is made up of the output voltage-stabiliser tube D5 and second capacitor C 2, the negativing ending grounding of the negative terminal of second electric capacity and output voltage-stabiliser tube D5, and the anode of the anode of second electric capacity and output voltage-stabiliser tube D5 receives described pump start instruction, and output oil pump drive signal.
The antijamming capability of first electric capacity, voltage-stabiliser tube and output voltage-stabiliser tube D5, second capacitor C, 2 intensifier circuits.
Working principle of the present utility model is:
The pump start instruction of ECU output; through signal acquisition circuit 1 filtering; after eliminating interference; send to gate drive circuit 3; after 3 pairs of command signal shapings of gate drive circuit; sending to metal-oxide-semiconductor amplification circuit 4 amplifies; its amplifying signal is through protective circuit 2 filtering; after eliminating interference, the oil pump drive signal oil pump of output low level, oil pump obtains vehicle power work; simultaneously; drain electrode string at switching tube Q has sustained diode 4 to be connected with the oil pump power supply, be connected in series clamped pipe D3 and drive instantaneous voltage with restriction between switching tube Q grid and drain electrode, protects oil pump safety.
, overcurrent too high or when unloaded when switching tube Q temperature, temperature protection circuit, over-current protection circuit and no-load protection circuit send corresponding trouble signal respectively, and control switch pipe Q quits work, and play the protection to switching tube Q and oil pump.
Claims (4)
1, a kind of oil pump control circuit, comprise signal acquisition circuit (1), signal transformation circuit and protective circuit (2), it is characterized in that: described signal transformation circuit is made up of gate drive circuit (3) and metal-oxide-semiconductor amplification circuit (4), wherein said signal acquisition circuit (1) obtains the pump start instruction and flows to described gate drive circuit (3), this gate drive circuit (3) is to pump start instruction shaping, and send to described metal-oxide-semiconductor amplification circuit (4), this metal-oxide-semiconductor amplification circuit (4) amplifies described pump start instruction back and generates drive signal, and export this drive signal and give described protective circuit (2), this protective circuit (2) output oil pump drive signal;
Described metal-oxide-semiconductor amplification circuit (4) is provided with switching tube (Q), the grid of this switching tube (Q) connects the output terminal of described gate drive circuit (3), source electrode is connected in series first resistance (R1) back ground connection, and the described pump start of drain electrode output instructs to described protective circuit (2); Described metal-oxide-semiconductor amplification circuit (4) is connected with temperature protection circuit, over-current protection circuit and no-load protection circuit;
Described temperature protection circuit is provided with thermistor (R2), this thermistor (R2) is encapsulated on the pipe shaft of described switching tube (Q), one end ground connection of thermistor (R2), connect positive supply behind the other end string divider resistance (R3), the common port of thermistor (R2) and divider resistance (R3) is connected the reverse input end of hot comparator (U3), the positive input of this hot comparator (U3) is connected on the movable tap of first adjustable resistance (R6), a fixed taps of this first adjustable resistance (R6) connects positive supply, another fixed taps crosstalk resistance back ground connection, the negative pole of the output termination high temperature diode (D6) of described hot comparator (U3), the positive pole of this high diode temperature (D6) connects the grid of described switching tube (Q);
Described over-current protection circuit is provided with overcurrent comparator (U4), the positive input of this overcurrent comparator (U4) is connected on the movable tap of second adjustable resistance (R4), one fixed end ground connection of this second adjustable resistance (R4), connect positive supply after another fixed end crosstalk resistance, the reverse input end of described overcurrent comparator (U4) is connected on the source electrode of described switching tube (Q), the output terminal of described overcurrent comparator (U4) is taken over the negative pole of stream diode (D7), and the positive pole of this overcurrent diode (D7) connects the grid of described switching tube (Q);
Described no-load protection circuit is provided with unloaded comparator (U5), the positive input of this zero load comparator (U5) is connected on the source electrode of described switching tube (Q), the reverse input end of this zero load comparator (U5) is connected on the movable tap of the 3rd adjustable resistance (R5), one fixed end ground connection of the 3rd adjustable resistance (R5) connects positive supply after another fixed end crosstalk resistance; The negative pole of the unloaded diode of the output termination of described unloaded comparator (U5) (D8), the positive pole of this zero load diode (D8) connects the grid of described switching tube (Q).
2, oil pump control circuit according to claim 1, it is characterized in that: described gate drive circuit (3) is made up of first not gate (U1) and second not gate (U2), wherein the input end of first not gate (U1) receives described pump start instruction, output terminal connects the input end of described second not gate (U2), and the output terminal of second not gate (U2) connects described metal-oxide-semiconductor amplification circuit (4).
3, oil pump control circuit according to claim 1, it is characterized in that: described signal acquisition circuit (1) is made up of first electric capacity (C1) and voltage-stabiliser tube (D1), the negativing ending grounding of the negative terminal of first electric capacity (C1) and voltage-stabiliser tube (D1), the anode of the anode of first electric capacity (C1) and voltage-stabiliser tube (D1) receives described pump start instruction, and exports this pump start and instruct to described signal transformation circuit.
4, oil pump control circuit according to claim 1; it is characterized in that: described protective circuit (2) is made up of output voltage-stabiliser tube (D5) and second electric capacity (C2); the negativing ending grounding of the negative terminal of second electric capacity (C2) and output voltage-stabiliser tube (D5); the anode of the anode of second electric capacity (C2) and output voltage-stabiliser tube (D5) receives described pump start instruction, and output oil pump drive signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200996506U CN201250738Y (en) | 2008-08-06 | 2008-08-06 | Oil pump controlling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200996506U CN201250738Y (en) | 2008-08-06 | 2008-08-06 | Oil pump controlling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201250738Y true CN201250738Y (en) | 2009-06-03 |
Family
ID=40746412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200996506U Expired - Lifetime CN201250738Y (en) | 2008-08-06 | 2008-08-06 | Oil pump controlling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201250738Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867348A (en) * | 2010-06-11 | 2010-10-20 | 浙江中数科技有限公司 | Radio frequency solid broadband high-power amplifier module |
| CN101338715B (en) * | 2008-08-05 | 2011-01-05 | 力帆实业(集团)股份有限公司 | Oil pump controller |
-
2008
- 2008-08-06 CN CNU2008200996506U patent/CN201250738Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338715B (en) * | 2008-08-05 | 2011-01-05 | 力帆实业(集团)股份有限公司 | Oil pump controller |
| CN101867348A (en) * | 2010-06-11 | 2010-10-20 | 浙江中数科技有限公司 | Radio frequency solid broadband high-power amplifier module |
| CN101867348B (en) * | 2010-06-11 | 2012-11-07 | 浙江中数科技有限公司 | Radio frequency solid broadband high-power amplifier module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090603 |
|
| CX01 | Expiry of patent term |