CN101619691B - Preheating fuel pipe of diesel engine - Google Patents
Preheating fuel pipe of diesel engine Download PDFInfo
- Publication number
- CN101619691B CN101619691B CN 200910091214 CN200910091214A CN101619691B CN 101619691 B CN101619691 B CN 101619691B CN 200910091214 CN200910091214 CN 200910091214 CN 200910091214 A CN200910091214 A CN 200910091214A CN 101619691 B CN101619691 B CN 101619691B
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- fuel pipe
- preheating
- preheating fuel
- diesel engine
- alarm
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Abstract
The invention relates to a preheating device of an internal-combustion engine, in particular to a preheating fuel pipe of a diesel engine. The preheating fuel pipe of the diesel engine comprises a fuel pipe body (1), a heating actuating element, a control element, a sensing element, a work alarm element and a sealing element (11), wherein the sensing element, the work alarm element and the heating actuating element are respectively connected with the control element; and the control element controls the heating actuating element and the work alarm element according to a signal of the sensing element. Compared with the prior preheating device of the diesel engine, the preheating fuel pipe of the diesel engine adopts the design of direct fuel heating inside the pipe, thereby having high heating energy utility ratio and greatly reducing the preheating time needed by cold start; secondly, the heating actuating element has simple structure, high reliability, good popularity and low cost, and the preheating fuel pipe of the diesel engine uses a single chip machine to automatically control temperature, therefore, a manual error operation condition is prevented, and the energy saving is realized by precisely controlling heating time.
Description
Technical field
The present invention relates to a kind of internal combustion engine preheating device, particularly a kind of preheating fuel pipe of diesel engine.
Background technique
The low temperature flow of diesel oil is poor, and condensation point is high.Under cryogenic conditions, diesel engine cold start-up difficulty.May contain moisture in diesel oil simultaneously, may produce ice stifled under low temperature environment, oil supply system can't be the cold start-up fuel feeding.In order to guarantee that diesel engine can come into operation safely under cold environment, auxiliary low-temp. starting device is widely used.Common mode for improving the diesel engine low-temperature startup performance has three kinds, is respectively preheating machine oil, pre-hot cylinder and improves flowability of diesel oil, and wherein front two kinds of methods only just can work under diesel oil can keep the prerequisite of mobility.It is to use low freezing point diesel fuel that a kind of approach that improves diesel low-temperature liquidity is arranged at present, yet because the low freezing point diesel fuel price is higher, the diesel engine user cost also can increase.Even if the use low freezing point diesel fuel, diesel oil viscosity is still larger under low temperature environment, sparger can occur and spray that penetrating length is little, spraying is thick, the shortcoming of atomization and vaporization.
The another kind of approach that improves flowability of diesel oil is direct Heating Diesel Fuel.Be disclosed in CN93236032.7 " diesel engine low-temperature startup device " as the patent No., it discloses a kind of preheating device for diesel engine, install the PTC assembly of certain resistance additional in the transport pipe of original starter of diesel engine, utilize its positive-coefficient thermistor characteristic heated fuel oil.But this kind startup auxiliary device also has shortcoming: at first, due to the restriction of ptc material minimum dimension, coordinate comparatively difficulty with the fuel pipe of diesel engine regular size, cause that the mobility of diesel oil in pipe descends; Secondly, due to the more crisp frangibility of ptc material, heating region sporadicly disperses, and its functional reliability is not high.
Summary of the invention
For the problems referred to above, the cold start-up difficulty that causes because of working environment cold in order to overcome existing diesel engine, the invention provides a kind of novel diesel pre-heating device, it utilizes the direct Heating Diesel Fuel of heating executive component in fuel pipe, realizes easily at short notice starting smoothly.
Purpose of the present invention realizes by following technological scheme: a kind of preheating fuel pipe of diesel engine is provided, and it comprises fuel pipe body, heating executive component, control unit, sensor, work alarm element, seal element.
Preferably described heating executive component comprises at least one electric heating wire, and its manufacturing is simple, with low cost, flow resistance is little, and is higher for the versatility of each model diesel engine fuel oil pipeline; A kind of replacement scheme is to select a slice ribbon heater at least, and its advantage is that heat transfer area is large, and rate of heating is very fast; Another kind of alternative is to select at least one electrical bar, and its advantage is that heating value is large, and rate of heating is also very fast.In most preferred embodiment of the present invention, described heating executive component comprises three electric heating wire.Curved when every electric heating wire is connected with wiring terminal have a certain radian, makes electric heating wire be in the center of fuel pipe inside, so both had been conducive to homogeneous heating, can avoid again the danger of electric heating wire bonding short circuit.Electric heating wire preferably adopts the nichrome material, its have advantages of corrosion-resistant, heat-resisting, plasticity is good, can guarantee for a long time the reliability of electric heating wire work.
Preferably described control unit is with at least one single-chip microcomputer.In most preferred embodiment of the present invention, described control unit is with aviation rank single chip computer AT 89C2051, and its volume is small and exquisite, antijamming capability is strong, low-temperature working is stable, is suitable for the bad working environments at the motor of cold district's operation.
Preferably described work alarm element is with light-emitting alarm, and it can be positioned in instrument panel, makes the work alarm signal more directly perceived, is easy to the driver and observes; A kind of replacement scheme is to select buzzer, and its advantage is little to the instrument panel change, and the equipment later stage is installed additional more for convenience.In most preferred embodiment of the present invention, described work alarm element is with light emitting diode, and it has advantages of, and volume is little, energy consumption is low, reliability is high.
Preferably, described sensor comprises semiconductor thermistor formula temperature transducer, and its volume is little, cost is low, reliability is high; A kind of replacement scheme is to select platinum resistance temperature sensor, and it is linear that it has advantages of that specific resistance varies with temperature.In most preferred embodiment of the present invention, described sensor comprises six thermistor temperature sensors, and every section pipe is equipped with two sensors.Can avoid like this single-sensor to lose efficacy and cause diesel oil preheating out of control.
Preferably, seal element material adopts teflon, and it has good ageing resistance, corrosion resistance, sealing, electrical insulating property.In most preferred embodiment of the present invention, described seal element comprises some sealing gaskets and seal ring.
Preheating fuel pipe of diesel engine of the present invention is preferred for truck and the engineering machinery in cold district's operation.Compare with middle-size and small-size civilian vehicle, truck and the engineering machinery of cold district's operation are seldom put into the garage, so more difficult during cold start-up.Truck and engineering machinery are the tools of production, and its performance deficiency will directly affect economic benefit
Compare with the existing diesel Preheating unit due to preheating fuel pipe of diesel engine of the present invention and adopt directly heated fuel oil design in pipe, the heat energy utilization ratio is high, and cold start-up greatly reduces required preheat time; Secondly, the heating activator structure is simple, and reliability is high, and versatility is good, and is cheap; Use single-chip microcomputer that temperature is controlled automatically in addition, avoided the situation of artificial incorrect operation, by realizing energy-conservation to accurate control heating time.
Description of drawings
In order to make the present invention be more convenient for understanding, most preferred embodiment of the present invention is described by reference to the accompanying drawings now.
Fig. 1 is the schematic diagram of arbitrary section fuel pipe of the most preferred embodiment of preheating fuel pipe of diesel engine of the present invention.
Fig. 2 is the partial sectional view at fuel pipe wiring terminal embodiment illustrated in fig. 1 position.
Reference character: 1-fuel pipe body, 2-electric heating wire positive terminal, 3-battery positive voltage, the 4-single-chip microcomputer, the 5-light-emitting alarm, 6-temperature transducer, 7-electric heating wire negative terminal, the 8-oil connection, 9-wiring terminal pilot hole, 10-double nut, 11-seal element, 12-sensor pilot hole, 13 electric heating wire
Embodiment
Accompanying drawing shows the most preferred embodiment of preheating fuel pipe of diesel engine of the present invention.As shown in the figure, have wiring terminal pilot hole 9 on fuel pipe body 1, a side joint terminal 2 is connected with electric heating wire 13 with being connected in pipe, and a side joint terminal 2 and 7 relies on double nut 10 to be locked outside pipe.Wiring terminal 2 and 7 and the gap of its pilot hole 9 rely on seal element 11 sealings, to reach the non-leakage requirement of diesel oil.Battery positive voltage 3 is connected with single-chip microcomputer 4, and the Preheating unit assembly is powered.Car battery is generally 12V or 24V output voltage, and the present invention directly adopts above-mentioned voltage to electric heating wire 13 heating.Three electric heating wire lay respectively at fuel tank between fuel filter, fuel filter between low pressure fuel pump, low pressure fuel pump is to the fuel pipe between high pressure oil pump.Have 12, one temperature transducers of sensor pilot hole 6 and gather the fuel oil temperature data by a sensor pilot hole 12 on the fuel pipe body 1 of the positive terminal 2 of electric heating wire 13 and negative terminal 7 positions, side.Also rely on seal element 11 sealings between fuel pipe body 1 and temperature transducer 6, to reach the non-leakage requirement of diesel oil.The temperature sensor signal output terminal is connected with single-chip microcomputer 4, and single-chip microcomputer 4 is controlled the connecting and disconnecting of the circuit of electric heating wire 13 according to the temperature signal that receives.When Preheating unit broke down, power circuit was cut off automatically, prevented various contingencies.Single-chip microcomputer 4 is connected with light-emitting alarm 5, controls the break-make of light-emitting alarm.When Preheating unit heated, alarm 5 continued luminous; After the Preheating unit stopped heating, alarm 5 lights; If the Preheating unit fault, alarm 5 flashings.In order to increase the device safety in utilization, alarm 5 flashing methods hinder the difference of type and difference for some reason, be divided into oil pipe without oil report to the police, sensor failure reports to the police and oil temperature warning out of control.
Those skilled in the art are not difficult to find out, preheating fuel pipe of diesel engine of the present invention is not only applicable to truck and engineering machinery, but also can be used as the startup auxiliary device of the diesel engine of middle-size and small-size civilian vehicle.
Abovely describe in detail in conjunction with the preferred embodiments of the present invention, but this is not limitation of the present invention, every any simple modification of above embodiment being done according to the present invention program's technical spirit, equivalent variations and modification all still belong in the present invention program's scope.
Claims (16)
1. preheating fuel pipe of diesel engine, it comprises fuel pipe body (1), heating executive component, control unit, sensor, work alarm element, seal element (11), it is characterized in that:
Described seal element comprises some sealing gaskets and seal ring;
Described sensor, work alarm element, heating executive component are connected with control unit respectively; Described control unit is according to SC sigmal control heating executive component and the work alarm element of sensor;
Described work alarm element comprises the light-emitting alarm (5) of LED-type;
When Preheating unit heated, described alarm (5) continued luminous; After the Preheating unit stopped heating, described alarm (5) lights; If the Preheating unit fault, described alarm (5) flashing;
The alarm signal of described alarm (5) is divided into without oil warning, sensor failure reports to the police and oil temperature warning out of control;
Have wiring terminal pilot hole (9) on fuel pipe body (1), a side joint terminal (2,7) is connected with electric heating wire (13) in pipe, and a side joint terminal (2,7) relies on double nut (10) to be locked outside pipe.
2. preheating fuel pipe as claimed in claim 1, it is characterized in that: described executive component comprises at least one electric heating wire (13).
3. preheating fuel pipe as claimed in claim 1, it is characterized in that: described executive component comprises three electric heating wire (13), lay respectively at fuel tank between fuel filter, fuel filter between low pressure fuel pump, low pressure fuel pump is to the fuel pipe between high pressure oil pump.
4. preheating fuel pipe as claimed in claim 2 or claim 3 is characterized in that: described electric heating wire (13) and its wiring terminal (2,7) are curved when being connected a certain radian, makes electric heating wire (13) be in the center of fuel pipe inside.
5. preheating fuel pipe as claimed in claim 4, it is characterized in that: described electric heating wire (13) is made by nichrome.
6. preheating fuel pipe as claimed in claim 1, it is characterized in that: described executive component comprises a slice ribbon heater at least.
7. preheating fuel pipe as claimed in claim 1, it is characterized in that: described executive component comprises at least one electrical bar.
8. preheating fuel pipe as described in claim 6 or 7, it is characterized in that: described executive component is made by nichrome.
9. preheating fuel pipe as claimed in claim 5, is characterized in that: directly adopt the voltage of car battery that described heating wire (13) is heated.
10. preheating fuel pipe as claimed in claim 8, is characterized in that: directly adopt the voltage of car battery that described executive component is heated.
11. preheating fuel pipe as described in claim 9 or 10 is characterized in that: described control unit is with AT89C2051 type single-chip microcomputer (4).
12. described preheating fuel pipe as claimed in claim 11, it is characterized in that: described seal element is made by tetrafluoroethylene.
13. preheating fuel pipe as claimed in claim 12 is characterized in that: described sensor has semiconductor thermistor formula temperature transducer (6).
14. preheating fuel pipe as claimed in claim 12 is characterized in that: described sensor has platinum resistor formula temperature transducer.
15. preheating fuel pipe as claimed in claim 13 is characterized in that: this preheating fuel pipe is used for truck and the engineering machinery in cold district's operation.
16. preheating fuel pipe as claimed in claim 14 is characterized in that: this preheating fuel pipe is used for truck and the engineering machinery in cold district's operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910091214 CN101619691B (en) | 2009-08-14 | 2009-08-14 | Preheating fuel pipe of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910091214 CN101619691B (en) | 2009-08-14 | 2009-08-14 | Preheating fuel pipe of diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101619691A CN101619691A (en) | 2010-01-06 |
| CN101619691B true CN101619691B (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910091214 Expired - Fee Related CN101619691B (en) | 2009-08-14 | 2009-08-14 | Preheating fuel pipe of diesel engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN101619691B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775268A (en) * | 2012-10-22 | 2014-05-07 | 北汽福田汽车股份有限公司 | Cold started fuel oil heating and air intake preheating system and method for automotive engine |
| CN107846740B (en) * | 2017-11-10 | 2021-02-23 | 中国航发贵州黎阳航空动力有限公司 | Heating device for thermal state sealing test of fuel oil main pipe |
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2009
- 2009-08-14 CN CN 200910091214 patent/CN101619691B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101619691A (en) | 2010-01-06 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 053500 East Zone, Jingxian County Development Zone, Hebei Province Applicant after: Hebei Longfeng Rubber Products Co., Ltd. Address before: 053500, 220 Hua Hua Avenue, Hebei, Jingxian County Applicant before: Jingxian Longfeng Fluorocarbon Tube Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: JINGXIAN LONGFENG FLUOROCARBON TUBE CO., LTD. TO: HEBEI LONGFENG RUBBER PRODUCTS CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20130814 |