CN102269081B - Air intake tube water spray system of engine - Google Patents
Air intake tube water spray system of engine Download PDFInfo
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- CN102269081B CN102269081B CN 201110234776 CN201110234776A CN102269081B CN 102269081 B CN102269081 B CN 102269081B CN 201110234776 CN201110234776 CN 201110234776 CN 201110234776 A CN201110234776 A CN 201110234776A CN 102269081 B CN102269081 B CN 102269081B
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Abstract
The invention discloses an air intake tube water spray system of an engine. Each intake manifold leading to a combustion chamber is internally provided with a convex evaporation belt; an air intake duct general pipe is sequentially provided with a grate-type liquid drop evaporator, an air intake temperature sensor, an electromagnetic high-pressure water atomizing nozzle and an air intake flow rate sensor; the electromagnetic high-pressure water atomizing nozzle is sequentially connected with a high-pressure water pump and a water storage pump in series; an inlet end of the air intake duct general pipe is provided with a gas compressor; and a main control chip in an air intake pipe water spray electric control subsystem is respectively connected to the components above through a light beam, as well as is connected to a manual/ automatic water spray water exchange switch, a cooling water temperature sensor, a power sensor, a fuel oil consumption sensor, an exhaust temperature sensor, a rotation speed sensor and the like. The intake air is ensured to have favorable water atomization under the condition of no improvement of air intake temperature as far as possible to achieve the optimal temperature control effect; and the system provided by the invention can be controlled full-automatically and exchanged manually, the system is easy to modify on the existing engine, and the control accuracy is high, and the air intake pipe water spray strategy can be regulated appropriately as the working conditions of the engine.
Description
Technical field
The invention belongs to Structure of Internal-Combustion Engine, be specifically related to a kind of water spray system of engine charge pipeline.
Background technique
In recent years, the standard that automobile exhaust pollution thing discharge amount is limited improves constantly, and various countries have competitively carried out the research that reduces oxynitrides and carbon smoke exhaust control technique aspect.Comprising to water mixing in the firing chamber to reduce the research of combustion temperature method, for example water emulsification fuel is sprayed water suction tude water spray etc. the firing chamber in.Experiment shows that to part high engine load operating mode the suitable moisture that mixes can effectively absorb the heat in the cylinder in the firing chamber, reduces combustion temperature, and water vapour can dilute the oxygen of local overrich simultaneously.High temperature and hyperoxia concentration are to generate NOx essential condition, can contain the generation of bad condition by suitable water mixing; The richness of local burnup is poly-, high temperature and anoxic then are the conditions that forms soot, by the heat absorption of water vapour high specific heat capacity, reduces the purpose that combustion temperature can reach the control Soot Formation equally.This shows, in the firing chamber, mix part moisture, can all play certain control action to NOx and soot simultaneously, realize the low-temperature burning of low pollutant emission.And in the firing chamber, add in the different schemes of water quality is arranged respectively.
The technology of water emulsification fuel is by behind the fuel mixing, emulsifying with water and motor, sends into cylinder by the oil supply system of motor and participates in burning.Its advantage is: less to the structural modification of motor own, watering quantity can be regulated by the water emulsification ratio, and technical difficulty is less.But its shortcoming is: 1. the problem of phase separation of water emulsification fuel can't solve always, and emulsion fuel the problems such as muddiness, breakdown of emulsion occur easily along with the passing of resting period.2. the emulsifier cost is higher, and extensive its usage economy is poor.3. water emulsification fuel has certain corrosivity to engine fuel supply system and oil supply system, and can cause the insufficient lubrication of high pressure oil pump or oil-fuel injector needle-valve when using height ratio water emulsification fuel.4. mixing of water will take the originally passage of fuel, affects the specific power of motor.
Direct water spray technology in the cylinder, by similar oil spout nozzle to in-cylinder direct injection.Advantage is: the moment of supplying water, water output can in time be adjusted with engine operating condition, and water supply effect is good, can the efficient of moisture in cylinder be performed to maximum by the real-time adjustment of the strategy that supplies water.But its shortcoming is: 1. pair engine structure change difficulty is larger, and is very high to the requirement of sprinkler, and still needing increases the similar cover system of engine electric-controlled unit, complex structure, high cost.
The technology of suction tude water spray arranges water atomizing nozzle in suction tude, supply water in the firing chamber with air inlet.Advantage is: to the structural modification less of motor own, do not take the fuel feeding share, to the engine fuel supply system without extra demand.But shortcoming is: to control bad effect relatively poor if 1. add water atomization and combustion temperature etc.2. if optimize bad then might exert an influence to engine charge.
Can find out in sum, adopt the suction tude water spray to the structural modification less of motor own, because do not mix mutually with fuel, so there are not the problems such as the distinctive defective of emulsifier and emulsion fuel stability.Burning has many experimental researcies to the suction tude water spray both at home and abroad, yet to different model motor and different operating mode thereof, addible moisture content is not identical in the firing chamber, needs to formulate as the case may be the water supply strategy and optimize accordingly.Key is to solve suction tude water spraying structure optimize, the supply water matching problem of strategy, especially improves water mixing atomizing and evaporation, and water vapour is fully mixed with air inlet, avoids water droplet converging of suction tude internal face etc.These problems are if solve, and the effect that adopts the suction tude water spray to reach obviously is better than other dual modes.
Summary of the invention
The object of the present invention is to provide a kind of engine air inlet tube water spray system, realization can be controlled the engine chamber watering quantity, can adopt different water mixing strategies according to different engine operating condition, guarantee low-temperature burning and the low NOx, carbon smoke exhaust of motor when heavy duty is loaded greatly.
Address the above problem, the present invention is achieved by the following technical solutions:
The engine air inlet tube water spray system comprises inner convexed evaporator strip, spacing grid type drop vaporizer, intake air temperature sensor, electromagnetism high pressure water atomization nozzle, intake flow sensor, high-pressure water pump, water storage box, gas compressor, main control chip, hand/adaptive switched switch, cooling-water temperature sensor, power sensor, fuel consume sensor, exhaust gas temperature sensor, speed probe etc.Be provided with protruding formula evaporator strip in each intake manifold of firing chamber, the intake duct house steward is provided with spacing grid type drop vaporizer, intake air temperature sensor, electromagnetism high pressure water atomization nozzle and intake flow sensor successively.The electromagnetism high pressure water atomization nozzle is connected in series high-pressure water pump and water storage box successively.Intake duct house steward entrance point is provided with gas compressor.The main control chip that suction tude is sprayed water in the automatically controlled subtense angle is connected to respectively by wire harness: the relay in electromagnetism high pressure water atomization nozzle, intake air temperature sensor, spacing grid type drop vaporizer, high-pressure water pump, intake flow sensor hand/automatic water jetting diverter switch, cooling-water temperature sensor, power sensor, fuel consume sensor, exhaust gas temperature sensor, speed probe and each the protruding formula evaporator strip.Wherein consist of suction tude spray water automatically controlled subtense angle and injection subsystem by main control chip, high-pressure water pump, electromagnetism high pressure water atomization nozzle, hand/adaptive switched switch and corresponding wire harness control circuit.This system can be according to water supply strategy adjustment high-pressure water pump, and the time high-pressure water pump that does not need to spray water is closed, and saves engine power.This water supply strategy is stored in the Flash storage in the main control chip MCU with form of program code, and the signal that receives according to the I/O mouth carries out feedback control.Injection opportunity and emitted dose by main control chip control electromagnetism high pressure water atomization nozzle make different operating modes can both obtain preferably injection flow rate; The mounting point of water atomizing nozzle is close proximity to the rear end of gas compressor, bumps against through the high pressure after the supercharging, high-speed gas and water smoke, has not only reduced gas temperature, has also guaranteed the atomizing effect of water smoke.
Principle of the present invention is according to being: NOx is one of two kinds of main exhaust contaminants of motor.Constantly promoting in the situation of engine thermal efficiency, combustion temperature in the engine cylinder is constantly soaring, and as the three basic condition of maximum its production of thermal NO x of the NOx formation contribution that motor is produced is: high temperature, oxygen enrichment and certain reaction time.In these three conditions, the reaction time is to change with engine speed, the directly control of having no idea, and what can be intervened is exactly high temperature and local oxygen enrichment when burning.By water mixing in the suction tude, moisture enters the high temperature that will absorb behind the firing chamber in the firing chamber, so that the chemical reaction temperature during fuel combustion descends, little water droplet can become water vapour after heat absorption, and with the gas flow in the cylinder with the atomizing fuel oil and air mix, therefore such diluting effect is conducive to be controlled at the phenomenon that oxygen concentration appears in the part, and suitably mixing moisture in the firing chamber has positive effect for the inhibition of NOx.The soot formation condition of motor is: the enrichment of high temperature, local anoxic and fuel.In suction tude, spray water, moisture enters the firing chamber with air, not only can suppress to form the high temperature of soot, water vapour can also produce certain diluting effect to the fuel enrichment of part, and therefore mixing moisture in combustion process can play obvious inhibitory action to the formation of soot.Main control chip connects the operating mode of perception motor operation by each sensor, and according to the spray water regulation and control of strategy of the MAP data that different operating modes from each are mated mutually, the MAP data storing is in the Flash of main control chip accesser.Suction tude is sprayed water automatically controlled subtense angle can be by the manual switching control of manual/auto water spray diverter switch realization intake duct water spray.
Advantage of the present invention and beneficial effect be, proposed on a cover suction tude water supply equipment, to realize that water output, water supply strategy and the fogging degree of Under Different Work Condition of Engine is adjustable, automatic water-supply with switch manually controlled.Different regulating working conditions suction tude water spray parameters have been realized by spray water automatically controlled subsystem controls high-pressure water pump, electromagnetism high pressure water atomization nozzle of suction tude, and can with charge flow rate in the engine air inlet tube and temperature, automatically control the evaporation atomizing strategy of spacing grid type drop vaporizer, inner convexed evaporator strip.In the situation that does not as far as possible improve intake temperature, guarantee the atomizing and the good mixing of air inlet of suction tude water spray, control effect to reach the optimum temperature that enters behind the firing chamber.The present invention can Automatic Control also can manual switchover, be easy to reequip at available engine, control accuracy is high, can adjust suction tude water spray strategy with engine operating condition in good time.
Description of drawings
Shown in accompanying drawing be structure of the present invention and fundamental diagram.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and by embodiment, and following examples are narrative, are not determinate, can not limit protection scope of the present invention with this.
System of the present invention is connected to: be provided with protruding formula evaporator strip 1 in each intake manifold of firing chamber, intake duct house steward 2 is provided with spacing grid type drop vaporizer 3, intake air temperature sensor 4, electromagnetism high pressure water atomization nozzle 5 and intake flow sensor 6 successively; Electromagnetism high pressure water atomization nozzle 5 is connected in series high-pressure water pump 7 and water storage box 8 successively; Intake duct house steward entrance point is provided with gas compressor 9.The main control chip 10 that suction tude is sprayed water in the automatically controlled subtense angle is connected to respectively by wire harness: the relay end in electromagnetism high pressure water atomization nozzle 5, intake air temperature sensor 4, spacing grid type drop vaporizer 3, high-pressure water pump 7, intake flow sensor 6, hand/automatic water jetting diverter switch 11, cooling-water temperature sensor 12, power sensor 13, fuel consume sensor 14, exhaust gas temperature sensor 15, speed probe 16 and each the protruding formula evaporator strip 1.The control signal of main control chip all is connected to the relay end of spacing grid type drop vaporizer, inner convexed evaporator strip, after control signal is passed to relay, heating resistor in relay triggering and vaporizer and the evaporator strip and the connecting valve of automobile storage battery, the heating switching controls of realization vaporizer and evaporator strip.
Gas compressor 2 is connected and fixed by flange-interface and intake duct house steward 2.Hand/automatic water jetting diverter switch 11 is installed on the automobile cab dashboard.By main control chip, intake flow sensor, spacing grid type drop vaporizer, inner convexed evaporator strip, intake air temperature sensor, form atomizing and the evaporating system of suction tude water spray.
After inner convexed evaporator strip 1 is fit into described intake manifold, the intake manifold diameter reduction 2mm of inner convexed evaporator strip tail end whereabouts.Namely the end (near the position of engine intake) in intake manifold arranges a little micro section, is about 5mm.Purpose is that the moisture film that prevents from being attached to the intake manifold internal face " is climbed " the motivation suction port of setting out, by this hot micro section water film is stopped and retardation, so that moisture film evaporates moisture again, and suck uniformly motor with air inlet when getting over the micro section of high 2mm, long 5mm.
Periphery and the pipeline enclosure of spacing grid type drop vaporizer 3 and inner convexed evaporator strip 1 are provided with heat insulation temperature-resistant material.Can make them when the energising heating, can not make suction tude overheated too much heat transferred suction tude, because suction tude can be with the heat transferred air, thereby cause intake temperature to raise, the density of air inlet descends, the air inlet charge descends, and reduces the motor charging efficiency and then burning is had a negative impact.
The mounting point of electromagnetism high pressure water atomization nozzle 5 is apart from gas compressor 9 outlet (flange-interface place) 5mm.Air is after overcompression, temperature and flow velocity all can sharply increase, the water smoke that spray in high velocity air and the electromagnetism high pressure water atomization nozzle this moment bumps against, and not only can further increase fragmentation and the atomizing effect of water smoke, and the higher temperature in the gas can heat droplet simultaneously makes its atomizing thoroughly; On the other hand, water smoke can reduce the temperature of air inlet, so also just can increase the density of air inlet, has strengthened the air inlet charge of motor, and engine operation is had promoting effect.
The used main control chip of present embodiment adopts 16 MCU, S12X CPU, the highest bus speed 40MHz.
Suction tude is sprayed water automatically controlled subtense angle according to charge flow rate, and injection flow rate and intake temperature are judged and selection heating and atomizing strategy; Little at charge flow rate, injection flow rate is relatively large, in the situation that intake temperature is on the low side, spacing grid type drop vaporizer, inner convexed evaporator strip is worked simultaneously, and its temperature will suitably be increased.Large in air inflow, injection flow rate is little, in the higher situation of intake temperature, then closes spacing grid type drop vaporizer, just opens the inner convexed evaporator strip, and can according to different situations, regulate switching and the operating temperature thereof of two vaporizers.Its function of spacing grid type drop vaporizer is: with water smoke through after the intake manifold transports, the space droplet of regelation and compile at tube wall, and again evaporate atomizing with the thin liquid level that air inlet moves ahead.The function that is positioned at the inner convexed evaporator strip of intake manifold is: will again evaporate at the liquid level that the intake manifold internal face compiles through the wet air after several wide-angle deflections, so that moisture is more even when entering the firing chamber, atomizing is better, and guarantee not occur larger water droplet, along suction port drippage firing chamber the high speed moving elements such as piston and valve are caused damage.
Claims (6)
1. engine air inlet tube water spray system, comprise the inner convexed evaporator strip, spacing grid type drop vaporizer, intake air temperature sensor, the electromagnetism high pressure water atomization nozzle, intake flow sensor, high-pressure water pump, water storage box, gas compressor, main control chip, the hand control and automation diverter switch, cooling-water temperature sensor, power sensor, the fuel consume sensor, exhaust gas temperature sensor, speed probe, it is characterized in that: in each intake manifold of firing chamber, be provided with inner convexed evaporator strip (1), intake duct house steward (2) is provided with spacing grid type drop vaporizer (3) successively, intake air temperature sensor (4), electromagnetism high pressure water atomization nozzle (5) and intake flow sensor (6), electromagnetism high pressure water atomization nozzle (5) is connected in series high-pressure water pump (7) and water storage box (8) successively, intake duct house steward entrance point is provided with gas compressor (9), and the main control chip (10) that suction tude is sprayed water in the automatically controlled subtense angle is connected to respectively by wire harness: electromagnetism high pressure water atomization nozzle (5), intake air temperature sensor (4), spacing grid type drop vaporizer (3), high-pressure water pump (7), intake flow sensor (6), hand control and automation diverter switch (11), cooling-water temperature sensor (12), power sensor (13), fuel consume sensor (14), exhaust gas temperature sensor (15), relay end in speed probe (16) and each the inner convexed evaporator strip (1).
2. engine air inlet tube water spray system according to claim 1 is characterized in that described gas compressor (9) is connected and fixed by flange-interface and described intake duct house steward (2).
3. engine air inlet tube water spray system according to claim 1, it is characterized in that described inner convexed evaporator strip (1) is fit into described intake manifold after, the intake manifold diameter reduction 2mm of inner convexed evaporator strip tail end whereabouts.
4. according to claim 1 or 3 described engine air inlet tube water spray systems, it is characterized in that periphery and the pipeline enclosure of described spacing grid type drop vaporizer (3) and inner convexed evaporator strip (1) is provided with heat insulation temperature-resistant material.
5. engine air inlet tube water spray system according to claim 1 is characterized in that the mounting point of described electromagnetism high pressure water atomization nozzle (5) is apart from described gas compressor (9) outlet(discharge) flange 5-10mm.
6. engine air inlet tube water spray system according to claim 1 is characterized in that described hand control and automation diverter switch (11) is installed on the automobile cab dashboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110234776 CN102269081B (en) | 2011-08-16 | 2011-08-16 | Air intake tube water spray system of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110234776 CN102269081B (en) | 2011-08-16 | 2011-08-16 | Air intake tube water spray system of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102269081A CN102269081A (en) | 2011-12-07 |
| CN102269081B true CN102269081B (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110234776 Expired - Fee Related CN102269081B (en) | 2011-08-16 | 2011-08-16 | Air intake tube water spray system of engine |
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Families Citing this family (14)
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| CN103867345A (en) * | 2014-04-02 | 2014-06-18 | 中国船舶重工集团公司第七一一研究所 | Air inlet humidifying system for ship diesel engine |
| CN103867344A (en) * | 2014-04-02 | 2014-06-18 | 中国船舶重工集团公司第七一一研究所 | Diesel engine inlet air humidifying system with high humidifying efficiency |
| CN103939241A (en) * | 2014-04-02 | 2014-07-23 | 中国船舶重工集团公司第七一一研究所 | Gas inlet humidifying system for diesel engine |
| CN104728841B (en) * | 2015-03-25 | 2017-02-22 | 上海为默机械科技有限公司 | Combustor and commercial vehicle engine postprocessing assembly test method applying same |
| DE102016205145A1 (en) * | 2016-03-29 | 2017-10-05 | Robert Bosch Gmbh | Water injection device of an internal combustion engine of a vehicle |
| CN107288743A (en) * | 2017-08-04 | 2017-10-24 | 哈尔滨工业大学 | A kind of water jet internal combustion engine exhaust system |
| CN107989717A (en) * | 2017-09-07 | 2018-05-04 | 同济大学 | A kind of diesel engine sprayed water outside cylinder |
| CN107905919A (en) * | 2017-09-07 | 2018-04-13 | 同济大学 | A kind of natural gas engine sprayed water outside cylinder |
| CN108087157A (en) * | 2018-01-09 | 2018-05-29 | 天津大学 | A kind of compression-ignition engine low-temperature burning system with air intake duct spraying function |
| CN108049965A (en) * | 2018-01-09 | 2018-05-18 | 天津大学 | A kind of cleaning engine with air intake duct spraying function |
| JP6907973B2 (en) * | 2018-03-12 | 2021-07-21 | トヨタ自動車株式会社 | Internal combustion engine control device |
| CN109707505B (en) * | 2018-12-30 | 2020-11-27 | 北京工业大学 | Zero-nitrogen engine based on water injection control pressure rise rate oxygen closed cycle and control method thereof |
| CN112033690A (en) * | 2020-09-04 | 2020-12-04 | 中国航发贵阳发动机设计研究所 | Switching device for ground water swallowing test of aero-engine |
| CN115324725A (en) * | 2022-08-30 | 2022-11-11 | 长城汽车股份有限公司 | Engine air intake cooling structure and system, engine air intake cooling method and vehicle |
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