CN209409818U - A kind of device of automatic detection vehicle fuel feed system leakage - Google Patents
A kind of device of automatic detection vehicle fuel feed system leakage Download PDFInfo
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- CN209409818U CN209409818U CN201920084387.1U CN201920084387U CN209409818U CN 209409818 U CN209409818 U CN 209409818U CN 201920084387 U CN201920084387 U CN 201920084387U CN 209409818 U CN209409818 U CN 209409818U
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Abstract
The utility model discloses a kind of devices of automatic detection vehicle fuel feed system leakage, belong to automobile technical field.The device includes combustible gas sensor, voltage comparator, solid-state relay, loudspeaker；The connection of the input terminal of combustible gas sensor and voltage comparator；The common end of first variable resistance and second resistance connects voltage comparator, and second resistance connects voltage comparator；3rd resistor and the second adjustable resistance parallel connection constitute temperature-compensation circuit；First output end of voltage comparator is connect with the first solid-state relay；The second output terminal of voltage comparator is connect with the second solid-state relay, and the second solid-state relay connects second source, and the second solid-state relay is connect with the coil of the fuel pump relay on automobile；Solves the working condition using Engine ECU control fuel pump, in fact it could happen that ECU controls the problem of failure；Reach the control speed for promoting fuel pump, improves the effect of control reliability.
Description
Technical field
The utility model embodiment is related to automobile technical field, in particular to a kind of automatic detection vehicle fuel feed system
The device of leakage.
Background technique
With the development of economy, China's car ownership rises steadily.In the use process of automobile, with service life
Continuous growth, the fuel oil supply system pipeline of automobile also can aging, the fuel pipe of aging, which will appear cracking, pin hole occur etc., asks
Topic, leading to automobile, there is a situation where fuel leakages under steam.
Fuel oil has the characteristics that effumability and flammable, the fuel oil of leakage meeting and sky in narrow closed enging cabin
Gas is mixed into combustion mixture, when the oil gas of volatilization mixes with air a certain concentration, such as 1.3%V/V (volumetric concentration)-
6.0%V/V can lead to self-burning of vehicle because of factors such as high temperature, electrostatic.
Utility model content
In order to solve problems in the prior art, the utility model embodiment provides a kind of automatic detection vehicle fuel supply
The device of system leak.The technical solution is as follows:
In a first aspect, providing a kind of device of automatic detection vehicle fuel feed system leakage, including fuel gas passes
Sensor, voltage comparator, solid-state relay, loudspeaker；
The connection of the input terminal of combustible gas sensor and voltage comparator, combustible gas sensor connect the first power supply；
First resistor, the first variable resistance and second resistance threshold value circuit in series, the first electricity of first resistor connection
The common end of source, the first variable resistance and second resistance connects voltage comparator, and second resistance connects voltage comparator；
3rd resistor and the second adjustable resistance parallel connection composition temperature-compensation circuit, the one of second resistance and temperature-compensation circuit
End connection, the other end ground connection of temperature-compensation circuit；
First output end of voltage comparator is connect with the first solid-state relay, and the first solid-state relay is connect by loudspeaker
First power supply；
The second output terminal of voltage comparator is connect with the second solid-state relay, the second electricity of the second solid-state relay connection
Source, the second solid-state relay are connect with the coil of the fuel pump relay on automobile, the contact of fuel pump relay and fuel pump
Connection；
Combustible gas sensor is also connected with the third variable resistance of ground connection.
Optionally, further include light emitting diode, the both ends of loudspeaker are connected in parallel on after light emitting diode the 4th resistance of series connection.
Optionally, the model TGS2610 of combustible gas sensor, the model LM393 of voltage comparator.
Optionally, the first power supply is+5V power supply.
Optionally, second source is+12V power supply.
Optionally, the first solid-state relay is grounded, combustible gas sensor ground connection.
Technical solution provided by the embodiment of the utility model has the benefit that
By setting combustible gas sensor, voltage comparator, solid-state relay and loudspeaker, combustible gas sensor with
Voltage comparator connection, voltage comparator are connect with two solid-state relays, and one of solid-state relay connects loudspeaker, separately
The coil of fuel oil relay, passes through the fuel concentration of combustible gas sensor detection volatilization on one solid-state relay connection automobile
Whether reach alarm value, after fuel concentration reaches alarm value, by the output of voltage comparator difference pin, controls loudspeaker
It sounds the alarm, controls logical between contact and power supply of the on off operating mode of the coil of fuel oil relay to control fuel oil relay
It is disconnected, directly control the working condition of fuel pump；It solves oil gas in the related technology to control more than after alarm value using Engine ECU
The working condition of fuel pump, in fact it could happen that ECU controls the problem of failure；Reach the control speed for promoting fuel pump, improves control
The effect of reliability processed.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of device in detection vehicle fuel feed system leakage automatically shown according to an exemplary embodiment
Structural block diagram；
Fig. 2 is a kind of device of automatic detection vehicle fuel feed system leakage shown according to an exemplary embodiment
Circuit diagram.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Referring to FIG. 1, it illustrates the automatic detection vehicle fuel feed systems that the utility model one embodiment provides
The structural schematic diagram of the device of leakage.The device setting of the automatic detection vehicle fuel feed system leakage is in the car.Such as Fig. 1
Shown, which includes combustible gas sensor 110, detection circuit 120, report
Alert circuit 130, fuel oil pump control circuit 140.
Fuel oil pump control circuit 140 is connect with the fuel pump 150 on automobile, Engine ECU 160.Fuel oil pump control circuit
140 can directly control the on off operating mode between fuel pump 150 and power supply.
Combustible gas sensor 110 is connect with detection circuit 120, and detection circuit 120 is connect with warning circuit 130, detection
Circuit 120 is connect with fuel oil pump control circuit 140；Fuel oil pump control circuit 140 is controlled according to the testing result of detection circuit 120
The testing result of the on-off of fuel pump 150, detection circuit is indicated with high level or low level.
Wherein, combustible gas sensor, detection circuit 120, warning circuit 130 connect the first power supply, fuel pump control electricity
Road 140 connects second source.
The position that fuel leakage easily occurs for automobile content is arranged in combustible gas sensor, for detecting whether fuel oil occurs
Leakage.Under normal circumstances, combustible gas sensor is arranged in enging cabin.
Detection circuit includes voltage comparator, several variable resistances and several resistance.
Warning circuit includes the first solid-state relay and loudspeaker.Optionally, warning circuit further includes light emitting diode.
Fuel oil pump control circuit includes the second solid-state relay, fuel pump relay on the second solid-state relay and automobile
Coil connection, contact one end of fuel pump relay are connect with second source, the contact other end and automobile of fuel pump relay
On fuel pump connection.
In one example, the model TGS2610 of combustible gas sensor, the model LM393 of voltage comparator.
Optionally, the first power supply is+5V power supply, and second source is+12V power supply.
Fig. 2 schematically illustrates the circuit theory schematic diagram of the device of automatic detection vehicle fuel feed system leakage.
Combustible gas sensor U1 is connect with the input terminal of voltage comparator U2, the 2nd pin of combustible gas sensor U1
It is connect with the 3rd pin, the 5th pin of voltage comparator U2.
Combustible gas sensor U1 the first power supply of connection+5V.
First resistor R1, the first variable resistance RP1 and second resistance R2 threshold value circuit in series, threshold value circuit are used
Detected value at set-point A and point B；Detected value at point A and point B can be realized by adjusting the first variable resistance RP1.
Wherein, the first power supply of first resistor R1 connection+5V, first resistor R1 is connect with the first variable resistance RP1, and first can
Power transformation resistance RP1 is connect with second resistance R2, and the common end of the first variable resistance RP1 and second resistance R2 are B point, second resistance R2
The other end be A point.
First variable resistance RP1 is connect with the common end of second resistance R2 with the 6th pin of voltage comparator U2；Second electricity
The other end of resistance R2 is connect with the 2nd pin of voltage comparator U2.
3rd resistor R3 and the second adjustable resistance TH constitutes temperature-compensation circuit, adjusts the second adjustable resistance TH to realize temperature
Degree compensation.
One end of second resistance R2 and temperature-compensation circuit connection, that is, the one of 3rd resistor R3 and the second adjustable resistance TH
A common end is connect with second resistance R2.
Temperature-compensation circuit ground connection, i.e. another common end grounding of 3rd resistor R3 and the second adjustable resistance TH.
Combustible gas sensor U1 is also connected with the third variable resistance RX of ground connection.By adjust third variable resistance RX come
Environmental gas concentration is set.
The first output end of voltage comparator U2 is connect with the first solid-state relay SSR1, specifically, voltage comparator U2
The 1st pin connect with the 3rd pin of the first solid-state relay SSR1.
First solid-state relay SSR1 is normally opened, for controlling loudspeaker sp.
First solid-state relay SSR1 meets the first power supply+5V by loudspeaker sp, specifically, the first solid-state relay SSR
The 1st pin connect with loudspeaker sp, loudspeaker sp is connect with the first power supply+5V.
The device of the automatic detection vehicle fuel feed system leakage further includes light emitting diode D1, light emitting diode D1 string
Join the both ends that loudspeaker sp is connected in parallel on after the 4th resistance R4.
2nd pin of the first solid-state relay and the 4th pin ground connection.
The second output terminal of voltage comparator U2 is connect with the second solid-state relay SSR2, specifically, voltage comparator U2
The 7th pin connect with the 3rd pin of the second solid-state relay.
Second solid-state relay SSR2 is normally closed, for controlling the coil K of fuel pump relay J1.
Second solid-state relay SSR2 connection second source, specifically, the 1st pin of the second solid-state relay SSR2 connects second
Power supply+12V.
Second solid-state relay SSR2 is connect with the coil K of the fuel pump relay J1 on automobile；Specifically, the second solid-state
The 2nd contact of relay SSR2 is connect with the coil K of the fuel pump relay J1 on automobile.
Contact one end of fuel pump relay J1 is connect with fuel pump, the contact other end of fuel pump relay J1 and second
Power supply+12V connection.
The coil K of fuel pump relay J1 on automobile is also connect with the Engine ECU on automobile.
The 4th pin of voltage comparator U2 is grounded, and the 8th pin of voltage comparator U2 meets the first power supply+5V.
The 4th pin of second solid-state relay SSR2 is grounded.
Second source and the second solid-state relay SSR2, fuel pump relay J1 contact between be connected with fuse F.
In one example, 2 alarm values are arranged in the device leaked for the automatic detection vehicle fuel feed system.Due to
The output voltage of combustible gas sensor can change with fuel oil volatilization concentration, can be according to the defeated of combustible gas sensor
The fuel concentration of voltage judgement volatilization out.
By adjusting the first variable resistance, the first alarm value of setting is 10%, and the second alarm value is 25%, as shown in Fig. 2,
Point A corresponding 10%, point B corresponding 25%.The device booting moment of the automatic detection vehicle fuel feed system leakage can issue police
Report sound；When combustible gas sensor U1 being allowed to detect gas concentration lower than 10%, the 1st pin of voltage comparator U2 and the 7th draws
Foot exports low level, and light emitting diode D2 is not lighted, and loudspeaker sp does not sound the alarm；When combustible gas sensor U1 is detected
When the fuel concentration of volatilization reaches 10%, the 1st pin of voltage comparator U2 exports high level, and the first solid-state relay SSR1 is dynamic
Making, light emitting diode D2 is lighted, and loudspeaker sp sounds the alarm, at this point, the 7th pin of voltage comparator U2 exports low level,
Second solid-state relay SSR2 is failure to actuate；When combustible gas sensor U1 detects that the fuel concentration of volatilization reaches 25%, electricity
The 1st pin of comparator U2 is pressed to export high level, the first solid-state relay SSR1 movement, light emitting diode D2 is lighted, loudspeaker
Sp sounds the alarm, at this point, the 7th pin of voltage comparator U2 exports high level, the second solid-state relay SSR2 movement, automobile
On fuel pump relay J1 coil K power-off, the contact of fuel pump relay J1 disconnects, the contact with fuel pump relay J1
Connection between the fuel pump M and second source+12V of connection disconnects, fuel oil supply system fuel cut-off.Due to fuel pump relay
The coil K of device J1 connects Engine ECU on automobile, and when the coil K of fuel pump relay J1 power-off, Engine ECU can also be received
Fuel oil to expression volatilization is more than the signal of the second alarm value.
In conclusion the device of automatic detection vehicle fuel feed system leakage provided by the embodiment of the utility model, if
Combustible gas sensor, voltage comparator, solid-state relay and loudspeaker are set, combustible gas sensor and voltage comparator connect
It connects, voltage comparator is connect with two solid-state relays, and one of solid-state relay connects loudspeaker, another solid-state relay
Device connects the coil of fuel oil relay on automobile, whether reaches alarm by the fuel concentration of combustible gas sensor detection volatilization
Value, by the output of voltage comparator difference pin, controls loudspeaker and sounds the alarm after fuel concentration reaches alarm value,
The on-off between contact and power supply of the on off operating mode of the coil of fuel oil relay to control fuel oil relay is controlled, is directly controlled
The working condition of fuel pump；Solving oil gas in the related technology is more than the work after alarm value using Engine ECU control fuel pump
Make state, in fact it could happen that ECU controls the problem of failure；Reach the control speed for promoting fuel pump, improves control reliability
Effect.
It should be understood that above-mentioned the utility model embodiment serial number is for illustration only, do not represent the advantages or disadvantages of the embodiments.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (6)
1. a kind of device of automatic detection vehicle fuel feed system leakage, feature are being, including combustible gas sensor,
Voltage comparator, solid-state relay, loudspeaker；
The combustible gas sensor is connect with the input terminal of the voltage comparator, the combustible gas sensor connection first
Power supply；
First resistor, the first variable resistance and second resistance threshold value circuit in series, first electricity of first resistor connection
Source, first variable resistance connect the voltage comparator, the second resistance connection with the common end of the second resistance
The voltage comparator；
3rd resistor and the second adjustable resistance parallel connection composition temperature-compensation circuit, the one of the second resistance and temperature-compensation circuit
End connection, the other end ground connection of the temperature-compensation circuit；
First output end of the voltage comparator is connect with the first solid-state relay, and the first solid-state relay passes through the loudspeaking
Device connects the first power supply；
The second output terminal of the voltage comparator is connect with the second solid-state relay, the second solid-state relay connection second
Power supply, second solid-state relay are connect with the coil of the fuel pump relay on automobile, the touching of the fuel pump relay
Point is connect with fuel pump；
The combustible gas sensor is also connected with the third variable resistance of ground connection.
2. the apparatus according to claim 1, which is characterized in that it further include light emitting diode, the light emitting diode series connection
The both ends of the loudspeaker are connected in parallel on after 4th resistance.
3. the apparatus according to claim 1, which is characterized in that the model TGS2610 of the combustible gas sensor, institute
State the model LM393 of voltage comparator.
4. the apparatus according to claim 1, which is characterized in that first power supply is+5V power supply.
5. the apparatus according to claim 1, which is characterized in that the second source is+12V power supply.
6. the apparatus according to claim 1, which is characterized in that the first solid-state relay ground connection, the fuel gas
Sensor ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084387.1U CN209409818U (en) | 2019-01-17 | 2019-01-17 | A kind of device of automatic detection vehicle fuel feed system leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084387.1U CN209409818U (en) | 2019-01-17 | 2019-01-17 | A kind of device of automatic detection vehicle fuel feed system leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209409818U true CN209409818U (en) | 2019-09-20 |
Family
ID=67944197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920084387.1U Active CN209409818U (en) | 2019-01-17 | 2019-01-17 | A kind of device of automatic detection vehicle fuel feed system leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209409818U (en) |
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2019
- 2019-01-17 CN CN201920084387.1U patent/CN209409818U/en active Active
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