CN101503986B - Automatic alarm device of fuel oil filter - Google Patents
Automatic alarm device of fuel oil filter Download PDFInfo
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- CN101503986B CN101503986B CN2009100968257A CN200910096825A CN101503986B CN 101503986 B CN101503986 B CN 101503986B CN 2009100968257 A CN2009100968257 A CN 2009100968257A CN 200910096825 A CN200910096825 A CN 200910096825A CN 101503986 B CN101503986 B CN 101503986B
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- filter
- fuel
- piston
- alarm device
- shell
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Abstract
The invention relates to an alarm device, and aims to provide an automatic alarm device for a fuel filter of an internal combustion engine. The alarm device is provided with a sensor and comprises an unfiltered fuel cavity shell provided with an unfiltered fuel inlet and a filtered fuel cavity shell provided with a filtered fuel inlet, wherein the two shells are butted to form a cavity, a piston is arranged in the cavity, and two springs are arranged on two sides of the piston and between inner walls at two ends of the cavity respectively; the unfiltered fuel cavity shell and the filtered fuel cavity shell are provided with an adjusting conductive screw penetrating through the shell respectively, the piston is penetrated by a conductive rod, and two ends of the conductive rod correspond to the ends of the two adjusting conductive screws respectively; and the conductive rod is connected with a conducting wire for connecting with one electrode of a power supply, and the two adjusting conductive screws are connected with the conducting wire respectively for connecting with the other electrode of the power supply. The alarm device not only has the function of blockage alarm, but also has the function of breakdown alarm. The alarm device has the advantages of simple structure, small volume, flexible arrangement, low manufacturing cost and easy popularization.
Description
Technical field
The present invention relates to a kind of warning device, particularly relate to the autoalarm of a kind of internal-combustion engine with fuel filter.
Background technique
Air-strainer, oil filter and fuel filter three are collectively referred to as " three filters ", and the filtration that " three filters " undertakes engine aspirating system, lubrication system and combustion system medium respectively guarantees the motor proper functioning, prolong engine operational life, increase work efficiency.
Fuel filter is the important component part of oil supply system.In processing, transportation process, fuel oil can be sneaked into impurity such as bisque, water unavoidably, and these impurity are very big to the harm of oil supply system, and concerning diesel engine, impurity can seriously aggravate the wearing and tearing of three big precision pairs in the diesel oil injection system, and the pump oil pressure is descended especially.If impurity enters cylinder, can cause wearing and tearing increase in the engine cylinder, burn deterioration, power performance descends, consequences such as discharging aggravation.
Filter cleaner will periodically be changed or clean.If not, along with the increase of operating time, the impurity that accumulates gradually on the filter cleaner filter layer can result in blockage, and causes symptoms such as engine oil deficiency, after-burning.For fear of the appearance of this situation, be furnished with obstruction alarm device in the existing fuel filter more, after turnover oil pressure pressure reduction increases to a certain limit value, think that this moment, filter cleaner stopped up, trigger warning circuit reminding user to replace filter cleaner.
Yet it is to stop up the even more serious failure mode of failure consequence than filter cleaner that the breakdown or bonding place, border of filter cleaner filter layer is damaged.This moment, fuel oil can directly enter injection system without filtering, and so not only can cause some above-mentioned counter productives, even can cause dangerous situations such as motor is often flame-out, startup difficulty.
If obstruction is ignored, perhaps stop up alarm and break down, after stopping up to a certain degree, pass in and out finally that oil pressure pressure reduction is excessive to cause puncturing filtering layer.Along with the enhancing of engine power density requirements, the use of some new technologies can cause and might not stop up the puncture situation that just taken place by fuel filter.Use such as high-pressure common rail fuel injection technology, can cause recirculating oil quantity significantly to increase than traditional oil-fired system, cause through the pressure fluctuation of filter cleaner violent, and along with being total to the rail growth of service time, the nozzle wear amount can increase gradually, and the same like this recirculating oil quantity that can cause changes, and pressure fluctuation is violent, under some operating mode, oil pressure may reach a very big value in a flash and filter layer is punctured at certain.Along with the oil feed pump growth of service time, pump itself may produce some impurity simultaneously, and the existence of these metal impurities makes the possibility that punctures further become big.In addition, bonding place, filter layer border may be because bonding not firm or be immersed in for a long time in the oil to soften and damage yet.
But present fuel filter has only designed the warning device under stopping state, and has ignored the consequence that filter layer punctures situation and brings.Purpose of the present invention is exactly under above-mentioned technical background, designs a kind of fuel filter warning device that has warning of stopping up and function of breakdown alarm simultaneously.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of fuel filter warning device that has warning of stopping up and function of breakdown alarm simultaneously.
To achieve the object of the present invention, the invention provides a kind of automatic alarm device of fuel oil filter, comprise preceding fuel inlet of filter and filter back fuel inlet, also has a sensor, this sensor comprises fuel chamber shell and filter after-burning cavity shell before the filter that fuel inlet and filter back fuel inlet before the filter are set respectively, the butt joint of two shells forms cavity, establishes a piston in the cavity, and a spring respectively is set between the inwall at piston both sides and cavity two ends; On fuel chamber shell and the filter after-burning cavity shell adjustment contact screw that runs through shell is set respectively also before the filter, runs through on the piston that a contact rod being set, the two ends of contact rod are corresponding mutually with two terminations of adjusting contact screw respectively; Contact rod is connected a utmost point that is used to be connected to power supply with lead, adjust contact screw for two and be connected another utmost point that is used to be connected to power supply respectively with lead.
As a kind of improvement, described piston with filter before fuel chamber shell or filter on the contacted piston of the inwall outer ring of after-burning cavity shell and be arranged with seal groove, built-in seal ring.
As a kind of improvement, the fuel chamber shell is connected by bolt fastener with filter after-burning cavity shell before the described filter.
As a kind of improvement, fuel chamber shell and filter after-burning cavity shell joint are provided with seal ring before the described filter.
As a kind of improvement, encircle on the inwall of fuel chamber shell or filter after-burning cavity shell before the described filter and establish the piston limit structure.
As a kind of improvement, between described contact rod and the piston, adjust before contact screw and the filter between the fuel chamber shell, adjust contact screw and filter between the after-burning cavity shell and insulate.
As a kind of improvement, one of them connecting end of fuel chamber shell or filter after-burning cavity shell extends towards inside before the described filter, as the limit structure of piston.
As a kind of improvement, the contact rod on the described piston is connected to by lead and runs through another contact rod of being located on fuel chamber shell before the filter or the filter after-burning cavity shell, and latter's ring is established the insulated enclosure cover, and is connected with lead and is used to be connected to power supply.
As a kind of improvement, described autoalarm also comprises power supply, switch and the alarm that constitutes the loop with sensor.
As a kind of improvement, described autoalarm also comprises power supply, time delay module and the alarm that constitutes the loop with sensor.
Beneficial effect of the present invention is:
1, this automatic alarm device of fuel oil filter complete function.Warning device different from the past only provides and stops up the warning simple function, and this device had both had the obstruction warning function, also had function of breakdown alarm, had guaranteed that the driver can correctly understand the working condition of fuel filter.
2, this automatic alarm device of fuel oil filter acoustooptic alarm simultaneously after reaching alarm threshold value and triggering guarantees that the driver can in time understand the working condition of fuel filter.
3, this automatic alarm device of fuel oil filter adaptability is good.Because different fuel filters is to have different obstructions and breakdown threshold, this device can mate different fuel filters by regulating the adjustment contact screw, and Applicable scope is more extensive.
4, this automatic alarm device of fuel oil filter reliable performance.The external circuit that warning device provides has time delay module, need reach a specified time rear indicator light and alarm just can be connected continue triggering, guarantee that warning device descends trigger circuit the alarm signal of mistake also can not occur at some cas fortuit (as fuel pressure fluctuation, Vehicular vibration etc.).
5, this automatic alarm device of fuel oil filter is simple in structure, and volume is little, and flexible arrangement, and low cost of manufacture are easy to promote.
Description of drawings
Fig. 1 is the structural representation of sensor among the present invention;
Fig. 2 is the working condition schematic representation of sensor among the present invention;
Fig. 3 is an external circuit schematic representation of the present invention.
Reference character is among the figure: filter back fuel inlet 1, filter after-burning cavity shell 2, bolt fastener 3, seal ring 4, fuel chamber shell 5 before the filter, fuel inlet 6 before the filter, pad 7, spring 8, adjust contact screw 9, contact rod 10, insulated enclosure cover 11, lead 12, piston 13, seal ring 14, insulated enclosure cover 15, contact rod 16, spring 17, pad 18, spring 19, adjust contact screw 20, storage battery 21, switch 22, time delay module 23, tutorial light 24, alarm 25, spring 26.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
Automatic alarm device of fuel oil filter in the present embodiment comprises a sensor; Described sensor comprises preceding fuel chamber shell 5 of filter and filter after-burning cavity shell 2, and fuel chamber shell 5 is respectively arranged with the preceding fuel inlet 6 of filter and filters back fuel inlet 1 with filter after-burning cavity shell 2 before filtering; Preceding fuel chamber shell 5 and filter after-burning cavity shell 2 are by bolt fastener 4 butt joint formation cavitys, and joint is provided with seal ring 4; Establish piston 13 in the cavity, spring 17 and spring 26 are set respectively between the inwall at piston 13 both sides and cavity two ends; She Zhi not run through the adjustment contact screw 9 of shell and adjust contact screw 20 on fuel chamber shell 5 and the filter after-burning cavity shell 2 before the filter, run through on the piston 13 that contact rod 16 being set, the two ends of contact rod 16 are corresponding mutually with the termination of adjusting contact screw 9, adjustment contact screw 20 respectively; By the 15 realization insulation of insulated enclosure cover, contact rod 10 rings are established insulated enclosure cover 11 and on the preceding fuel chamber shell of filter, are connected with a utmost point of contact rod 16 and power supply respectively by lead between contact rod 16 and the piston 13; Adjust between the preceding fuel chamber shell 5 of contact screw 9 and filter, adjust between contact screw 20 and the filter after-burning cavity shell 2 and insulate, adjust contact screw 9, adjust contact screw 20 is connected to power supply respectively with lead another utmost point;
Described piston 13 with the contacted piston of inwall 13 outer rings of filter after-burning cavity shell 2 on be arranged with seal groove, built-in seal ring 14.The connecting end of fuel chamber shell 5 extends towards inside before the filter, as the limit structure of piston 13.
The external circuit of present embodiment utilization comprises: as the parts such as storage battery 21, switch 22, time delay module 23, tutorial light 24 and alarm 25 of power supply, each parts is connected according to this by lead and is formed the loop.
As shown in Figure 2, in the present embodiment, the initial position of piston 13 is that this is that spring 17 and spring 26 are to be in the nature that is not subjected to external force near the b place of fuel chamber shell 5 end faces before the filter.Fuel oil is by filtering the cavity that preceding fuel inlet 6 enters into piston 13 the right before the filter, and filter back fuel oil is by filtering the cavity that back fuel inlet 1 enters into piston 13 left sides, and piston 13 is subjected to the active force of the right and left oil pressure like this.Because there is resistance in filter core, so fuel oil oil pressure ratio filter back fuel oil oil pressure is big before the filter, the resistance that piston 13 will overcome spring 17 and spring 26 is moved to the left.If piston 13 left and right sides oil pressure pressure reduction are Δ P, piston 13 areas are S, and the global stiffness after the rigidity series connection of spring 17 and spring 26 is k, the distance that piston 13 moves relative to the home position left is Δ x, when piston 13 is still in certain position, there is Δ PS=k Δ x, i.e. Δ x=Δ PS/k so.
Suppose that resistance is Δ P under the fuel filter normal working
b, along with the increase of operating time, the impurity on the filter core is more and more, and pressure reduction increases, when pressure reduction reaches a certain threshold value Δ P
aThe time can think that filter cleaner has stopped up, obvious Δ P
a＞Δ P
bAfter filter cleaner was breakdown, the part fuel oil just flow through filter cleaner without the filtration of filter core, has lacked the resistance of filter core, this moment pressure reduction will reduce, when pressure reduction less than a certain threshold value Δ P
cThe time just can think that filter cleaner is breakdown, visible Δ P
b＞Δ P
c
As mentioned above, because different fuel filters have different Δ P
aWith Δ P
c, with reference to Δ x=Δ PS/k, can be according to piston 13 corresponding displacement distance Δ x
aWith Δ x
cThe position of determine to adjust contact screw 9, adjusting contact screw 20.
This fuel filter warning device working procedure is as follows: when the fuel filter proper functioning, piston 13 is in the position of b, and contact rod 16 does not contact with adjustment contact screw 9, adjustment contact screw 20; When filter cleaner stops up gradually, pressure reduction increases, make piston 13 be moved to the left to the position of a, contact rod 16 contacts with adjustment contact screw 20, adjusting contact screw 20, contact rod 16, lead 12 is connected with contact rod 10 and has triggered external circuit, after triggering lasting one section preset delay time, tutorial light 24 can be lighted and alarm 25 is reported to the police; In like manner, when filter cleaner breakdown, pressure reduction reduces to make piston 13 position of c that moves right, contact rod 16 contacts with adjustment contact screw 9, adjusting contact screw 9, contact rod 16, lead 12 is connected with contact rod 10 and has triggered external circuit, after triggering lasting one section preset delay time, tutorial light 24 can be lighted and alarm 25 is reported to the police.
After contact screw 9, adjustment contact screw 20 positions all configured, under the idle situation of fuel filter, piston 13 both sides did not have pressure reduction, and at this moment piston 13 is in the position of c and has triggered external circuit.The situation of the false alarm that occurs for fear of this reason, as shown in Figure 3, the present invention has added a switch 22 in circuit, this switch is that the startup with motor is that filter cleaner is started working and opened, can adopt and come trigger switch 22, not work and the situation of false alarm with regard to fuel filter not occurring like this by methods such as automobile key switch come.In addition, situation owing to accidental trigger circuit under the reasons such as pressure surge, 13 vibrations of the road conditions of jolting lower piston can appear in fuel filter, for fear of false alarm in this case, as shown in Figure 3, the present invention has added a time delay module 23 in circuit, set a default delay time, so just guaranteed that this warning device only just alarm signal can occur under obstruction and the lasting like this situation about triggering of puncture.
At last, it is also to be noted that what more than enumerate only is a kind of specific embodiment framework with the fuel filter warning device.Obviously, the invention is not restricted to above embodiment, for example the left and right sides shell of sensor is being actually interchangeable aspect the function realization, therefore there is no need to limit which on a left side which on the right side; The end face reality of shell is not must be discrepant, and inner chamber specification of the same size also can be arranged, and piston is all removable at random position; Can on the inwall of shell, encircle separately and establish the piston limit structure, perhaps not establish.Therefore, all distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (10)
1. automatic alarm device of fuel oil filter, comprise preceding fuel inlet of filter and filter back fuel inlet, it is characterized in that, also has a sensor, this sensor comprises fuel chamber shell and filter after-burning cavity shell before the filter that fuel inlet and filter back fuel inlet before the filter are set respectively, the butt joint of two shells forms cavity, establishes a piston in the cavity, and a spring respectively is set between the inwall at piston both sides and cavity two ends; On fuel chamber shell and the filter after-burning cavity shell adjustment contact screw that runs through shell is set respectively also before the filter, runs through on the piston that a contact rod being set, the two ends of contact rod are corresponding mutually with two terminations of adjusting contact screw respectively; Contact rod is connected a utmost point that is used to be connected to power supply with lead, adjust contact screw for two and be connected another utmost point that is used to be connected to power supply respectively with lead.
2. automatic alarm device of fuel oil filter according to claim 1 is characterized in that, described piston with filter before fuel chamber shell or filter on the contacted piston of the inwall outer ring of after-burning cavity shell and be arranged with seal groove, built-in seal ring in the seal groove.
3. automatic alarm device of fuel oil filter according to claim 1 is characterized in that, the fuel chamber shell is connected by bolt fastener with filter after-burning cavity shell before the described filter.
4. automatic alarm device of fuel oil filter according to claim 1 is characterized in that, fuel chamber shell and filter after-burning cavity shell joint are provided with seal ring before the described filter.
5. automatic alarm device of fuel oil filter according to claim 1 is characterized in that, encircles on the inwall of fuel chamber shell or filter after-burning cavity shell before the described filter and establishes the piston limit structure.
6. automatic alarm device of fuel oil filter according to claim 1 is characterized in that, between described contact rod and the piston, adjust before contact screw and the filter between the fuel chamber shell, adjust contact screw and filter between the after-burning cavity shell and insulate.
7. automatic alarm device of fuel oil filter according to claim 1 is characterized in that, the connecting end of the connection end face of fuel chamber shell or filter after-burning cavity shell extends towards inside before the described filter, as the limit structure of piston.
8. automatic alarm device of fuel oil filter according to claim 1, it is characterized in that, contact rod on the described piston is connected to by lead and runs through another contact rod of being located on preceding fuel chamber shell of filter or the filter after-burning cavity shell, latter ring is established the insulated enclosure cover, and is connected with lead and is used to be connected to power supply.
9. according to described any one automatic alarm device of fuel oil filter of claim 1 to 8, it is characterized in that described autoalarm also comprises power supply, switch and the alarm that constitutes the loop with sensor.
10. according to described any one automatic alarm device of fuel oil filter of claim 1 to 8, it is characterized in that described autoalarm also comprises power supply, time delay module and the alarm that constitutes the loop with sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100968257A CN101503986B (en) | 2009-03-16 | 2009-03-16 | Automatic alarm device of fuel oil filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100968257A CN101503986B (en) | 2009-03-16 | 2009-03-16 | Automatic alarm device of fuel oil filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101503986A CN101503986A (en) | 2009-08-12 |
| CN101503986B true CN101503986B (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100968257A Expired - Fee Related CN101503986B (en) | 2009-03-16 | 2009-03-16 | Automatic alarm device of fuel oil filter |
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| CN (1) | CN101503986B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881035B (en) * | 2010-06-25 | 2012-06-13 | 上海三一重机有限公司 | Alarm control system and method for fuel oil system of excavator |
| CN103774530B (en) * | 2014-01-20 | 2017-09-01 | 南通东南公路工程有限公司 | A kind of distributor is blocked up sensing mechanism |
| CN110685839A (en) * | 2019-09-24 | 2020-01-14 | 西安中星测控有限公司 | Method for detecting blockage of three-filter system for vehicle based on pressure sensor |
| CN113944557A (en) * | 2021-11-22 | 2022-01-18 | 潍柴动力股份有限公司 | Fuel filter control method, device, apparatus, readable medium and program product |
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2009
- 2009-03-16 CN CN2009100968257A patent/CN101503986B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101503986A (en) | 2009-08-12 |
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Granted publication date: 20110914 Termination date: 20120316 |