CN101457713A - Subcritical steam auxiliary power gasoline engine - Google Patents
Subcritical steam auxiliary power gasoline engine Download PDFInfo
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- CN101457713A CN101457713A CNA2008101476857A CN200810147685A CN101457713A CN 101457713 A CN101457713 A CN 101457713A CN A2008101476857 A CNA2008101476857 A CN A2008101476857A CN 200810147685 A CN200810147685 A CN 200810147685A CN 101457713 A CN101457713 A CN 101457713A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention relates to a subcritical vapor auxiliary work done gasoline engine which comprises a water injector in a cylinder of the gasoline engine, wherein, the water injector comprises a water tank, an electric control unit, and water pumps, a water guideway, a water injection nozzle and a temperature sensor which are controlled by the electric control unit. The water injector is characterized in that the water pumps comprise a low pressure water pump and a high pressure water pump pressurizing water to be above 200bar, the low pressure water pump is arranged in the water tank and is communicated with the high pressure water pump, the high pressure water pump is communicated with the water guideway by a high pressure water pipe, the water injection nozzle is communicated with the water guideway, and a water injection opening extends into a combustion chamber of the gasoline engine. The gasoline engine also comprises a gasoline engine exhaust pipe used for heating water to above 250 DEG C and not more than 374.2 DEG C, and a high pressure water pipe penetrates through the exhaust pipe and then is communicated with the water guideway. The gasoline engine utilizes the waste heat of engine tail gas to do work circularly, thereby saving oil; the temperature of water injected into the cylinder is in a subcritical state, and the water is instantaneously vaporized in the cylinder under the pressure condition, thereby increasing the explosion pressure of the cylinder; and the torque output and the power are improved under the premise that the oil injection amount is not increased.
Description
Technical field
The invention belongs to a kind of the have combustion engine that adds the device of entry or steam in combustion gas, fuel or the fuel-air mixture, particularly a kind of subcritical steam auxiliary power gasoline engine.
Background technique
Petrol engine when work generally is that air, gasoline mixture are sucked cylinder, or in suction stroke, gasoline sprayed in the cylinder mix, compression stroke is used the spark ignitor mixed gas, mixture combustion before finishing, the temperature of gas in the jar raises, and pressure increases, and promotes the piston motion acting.Because the acting medium of petrol engine only comprises gasoline and air burning product, no longer increases other inflating medium, the cylinder temperature height generates harmful matters such as nitrogen nitrogen compound easily; The cooling system burden is big; The pinking possibility increases, and is unfavorable for realizing bigger compression ratio; The exhaust temperature height is to high temperature resistant higher with requirement of strength near the air outlet flue material of firing chamber; A large amount of heat energy distribute by exhaust and cooling system, and not only unconverted be power, on the contrary can consumption of power (must bigger fan and the water pump of use consumed power); Make the thermal efficiency less than 1/3rd of petrol engine in the prior art, in cylinder, the chemical energy that the reflection of gasoline and oxygen chemistry discharges, 1/3rd take away by cylinder wall, piston, cylinder head and petrol engine radiation system with the heat energy form, and 1/3rd are taken away by tail gas in the mode of heat energy; The thermal efficiency is lower, and energy waste is more.
Summary of the invention
Purpose of the present invention is intended to overcome above-mentioned deficiency of the prior art, and a kind of subcritical steam auxiliary power gasoline engine is provided, thereby improves the petrol engine thermal efficiency, improves torque per liter and power per liter, and fuel-economizing also reduces discharging.
The present invention adopts in a cover and the prior art water jet device like the petrol engine in-cylinder direct injection system class, promptly gather engine speed by ECU (Electrical Control Unit) (ECU or ECM), parameters such as fuel injection quantity (utilizing the ready-made data of electric injection system ECU (Electrical Control Unit)) and water temperature, select the suitable time, suitable injection rate, the rational ejector amount, to spray into cylinder by the subcritical steam that the outlet pipe heating obtains, instantaneous vaporization under the in-cylinder pressure condition, improve cylinder-firing pressure, under the prerequisite that does not increase fuel injection quantity, improve output torque and power, reach fuel-economizing and reduce the purpose of discharging.
Content of the present invention is: a kind of subcritical steam auxiliary power gasoline engine comprises: a petrol engine inner-vat sprinkler; This petrol engine inner-vat sprinkler comprises water tank, ECU (Electrical Control Unit), be electrically connected with ECU (Electrical Control Unit) and by water pump, water rail (being similar to the oily rail of high pressure co-rail diesel machine), water spout (be installed on the cylinder cap, be similar to the oil nozzle of high pressure co-rail diesel machine) and the temperature transducer of ECU (Electrical Control Unit) (ECU or ECM) control; It is characterized in that:
Described water pump is low-pressure pump (7) and water is forced into high-pressure water pump (6) more than the 200bar;
Described low-pressure pump (7) places in the water tank (8), the water intake of low-pressure pump (7) is connected with water tank (8), water outlet is connected by the water intake of water pipe with high-pressure water pump (6), and the water outlet of high-pressure water pump (6) is communicated with the water intake of water rail (1) by high-pressure water pipe (4);
Described water spout (2) is connected by the water outlet of water pipe with water rail (1), and it is indoor that the water orifice of water spout (2) stretches into petrol engine combustion;
Also comprise: one heats water to more than 250 ℃ but is no more than the outlet pipe (18) (realizing the heat exchange with petrol engine tail gas) of 374.2 ℃ petrol engine, and described high-pressure water pipe (4) is communicated with the water intake of water rail (1) after passing this outlet pipe (18) again.
In the content of the present invention: be preferably the exhaust purifier (5) (can be ternary catalyzing unit) that also is communicated with petrol engine on the described outlet pipe (18), the same prior art of structure.
In the content of the present invention: in the described high-pressure water pipe (4), one section high-pressure water pipe (4) of passing outlet pipe (5) is preferably shape in the shape of a spiral.Be beneficial to the absorption of heat.
In the content of the present invention: described temperature transducer (3) is installed on the terminal high-pressure water pipe (4) of outlet pipe (18), for ECU (Electrical Control Unit) provides the signal input, so that record water temperature exactly.
In the content of the present invention: described petrol engine is a four-stroke gasoline engine.
In the content of the present invention: the structure of described outlet pipe (18), exhaust purifier (5) (ternary catalyzing unit), combustion chamber of petrol engine etc. etc. can same prior art.
Compared with prior art, the present invention has following characteristics and beneficial effect:
(1) boiling point of water raises the corresponding reduction of the latent heat of vaporization with the pressure increase; Depress at standard atmosphere, the boiling point of water is 100 ℃, and vaporization heat is 2258.4 kilojoule per kilogram; But under the pressure of 220.7bar, the boiling point of water is 374 ℃, and vaporization heat is zero; Temperature is higher than 374 ℃, many high pressures no matter, and water all can not exist with liquid form again.Water under high pressure temperature reaches 374 ℃, is gaseous state and liquid threshold state; Near this temperature, be subcritical state;
The delivery temperature of petrol engine is 700-900 ℃, except that the normal working temperature of the exhaust purifier (ternary catalyzing unit) that keeps petrol engine, no longer has any value; In most of the cases, the energy contained of high temperature is wasted.Utilize the temperature of tail gas, heat energy no longer additionally is provided, water can be warming up to subcritical state;
At working stroke, maximum pressure is 30-50bar in the cylinder of petrol engine, the boiling point of corresponding water is 240 ℃-270 ℃, the water of subcritical state is sprayed into cylinder, and water temperature forms subcritical high pressure steam far above the instantaneous expansion vaporization of the boiling point of water under the cylinder pressure, improve cylinder pressure, increase the piston effective pressure, steam thermal energy is converted into mechanical energy, can improve the petrol engine thermal efficiency;
(2) adopt the present invention, make full use of the petrol engine existing structure, utilize the engine tail gas waste-heat circular work, reach the purpose of fuel-economizing; Apparatus of the present invention can use ripe prior art, transform on the basis of existing petrol engine in-cylinder direct injection system or diesel engine high-pressure co-rail system, and are simple and easy to do; Utilize ECU (Electrical Control Unit) (ECU or ECM) to carry out water spraying time and injection flow rate management, can use an independent ECU (or ECM), also can be shared with the ECU (or ECM) of management air inlet and fuel feeding, do not spray water in cold starting and the warming-up process, and can and regulate injection flow rate and water spraying time according to the operating mode flexible calibration, go after profits and advoid disadvantages; Possess by demarcate to realize adjust water spraying time, repeatedly water spray reaches the potentiality that discharging is best, oil consumption economizes most;
(3) adopt the present invention, it is indoor that water spout is installed in petrol engine combustion, the high pressure water that will reach subcritical state in certain stage of combustion stroke through heating sprays into cylinder, the high pressure water temperature that sprays in the cylinder is in subcritical state, under the in-cylinder pressure condition, water temperature improves cylinder-firing pressure far above the instantaneous vaporization of the boiling point of water, under the prerequisite that does not increase fuel injection quantity, improve output torque and power; By control injection flow rate and water spraying time, can reduce and avoid negative influence to flame mechanism; Water spray rear cylinder temperature reduces, and can suppress oxynitrides and generate; The acting of recovery exhaust heat-energy reduces the heat radiation of expansion stroke cylinder wall, piston, cylinder head etc. simultaneously, allows heat energy be converted into mechanical energy to greatest extent, improves the petrol engine thermal efficiency;
(4) simple in structure, produce easy to install, practical.
Description of drawings
Fig. 1 is an embodiment of the invention theory structure schematic representation;
Fig. 2-the 4th, water spout mounting point and working state structure schematic representation in the embodiment of the invention.
Among the figure: the exhaust purifier (can be ternary catalyzing unit) of 1-water rail (with gasoline engine oil rail function and structural similarity), 2-water spout, 3-temperature transducer, 4-high-pressure water pipe, 5-petrol engine, 6-high-pressure water pump, 7-low-pressure pump, 8-water tank, 9-ECU (Electrical Control Unit) (being ECU or ECM), 10-suction tude, 11-spark plug, 12-phase detector, 13-firing chamber, 14-cylinder, 15-piston, 16-cylinder head, 17-bent axle, 18-outlet pipe.
Embodiment
The invention will be further described by embodiment below in conjunction with accompanying drawing.
Embodiment 1: referring to each accompanying drawing.
A kind of subcritical steam auxiliary power gasoline engine (four-stroke gasoline engine) comprises a petrol engine inner-vat sprinkler; This petrol engine inner-vat sprinkler comprises: water tank 8, ECU (Electrical Control Unit) 9 (is formed and functional similarity with the ECU (Electrical Control Unit) structure of petrol engine in-cylinder direct injection system in the prior art, or title ECU or ECM, carry out the management of water spraying time and injection flow rate, can use an independent ECU or ECM, also can be shared) with the ECU or the ECM of management air inlet and fuel feeding, be electrically connected with ECU (Electrical Control Unit) 9 and by the water pump of ECU (Electrical Control Unit) 9 controls, water rail 1 (being similar to the oily rail 26S Proteasome Structure and Function of prior art mesohigh common rail diesel engine), water spout 2 (is installed on the cylinder head 16, be similar to the oil nozzle 26S Proteasome Structure and Function of prior art mesohigh common rail diesel engine) and 3, one of temperature transducers heat water to more than 250 ℃ but be no more than the outlet pipe 18 of 374.2 ℃ petrol engine;
Described water pump is that low-pressure pump 7 and Jiang Shui are forced into the above high-pressure water pump 6 of 200bar;
Described low-pressure pump 7 places in the water tank 8, the water intake of low-pressure pump 7 is connected with water tank 8, water outlet is connected by the water intake of water pipe with high-pressure water pump 6, and the water outlet of high-pressure water pump 6 passes outlet pipe 18 (realizing the heat exchange with tail gas) back by high-pressure water pipe 4, high-pressure water pipe 4 and is communicated with the water intake of water rail 1;
Described water spout 2 is connected by the water outlet of water pipe with water rail 1, and the water orifice of water spout 2 stretches in the combustion chamber of petrol engine 13;
Be communicated with the exhaust purifier 5 (can be ternary catalyzing unit) of petrol engine on the described outlet pipe 18;
In the described high-pressure water pipe 4, one section high-pressure water pipe 4 of passing outlet pipe 5 is shape in the shape of a spiral;
Described temperature transducer 3 is installed on the high-pressure water pipe 4 of outlet pipe 18 ends (being that tail gas heating is terminal, for ECU or ECM provide the signal input).
During use, water tank 8 is installed on the automobile chassis or engine nacelle interior (arranging according to car load design needs), low-pressure pump 7 is placed in the water tank 8, high-pressure water pump 6 is installed on the water tank 8, water rail 1 is installed on the cylinder head 16, water spout 2 is installed on the cylinder head 16, afterbody and water rail 1 link, and the water orifice of water spout 2 stretches in the firing chamber 13.
During work, by low-pressure pump 7 is that high-pressure water pump 6 supplies water, press high pressure water to high-pressure water pipe 4 from high-pressure water pump 6 outputs, high-pressure water pipe 4 is by outlet pipe 18 and the common heat exchanger that constitutes of the exhaust purifier 5 (can be ternary catalyzing unit) of petrol engine, and high pressure water and motor exhaust carry out heat exchange; Be connected with water rail 1 through the high-pressure water pipe 4 after the heat exchange, the high pressure water that will reach subcritical state through heating provides feedwater rail 1; Water rail 1 is connected with water spout 2, for water spout 2 provides subcritical high pressure water; Water spout 2 is installed on the cylinder head 16, and nozzle stretches into firing chamber 13; The electrical signal that water spout 2 is given according to ECU (Electrical Control Unit) (ECU or ECM) is opened water spray;
Temperature transducer 3 is converted into electrical signal transfer with measuring water temperature and gives ECU (Electrical Control Unit) (ECU or ECM), ECU (Electrical Control Unit) (ECU or ECM) is according to electrical signal (being water temperature) start-up system (present embodiment inner-vat sprinkler), according to the posterior infromation of the demarcation of internal reservoir, calculate water spraying time and injection flow rate; When water temperature was lower than setting value, system did not start, and system does not work; When water temperature is higher than setting value, set crank angle at combustion condition, system's starting, water spout 2 water sprays, injection flow rate (endurance) increases with the rising of water temperature; ECU (Electrical Control Unit) (ECU or ECM) is by crankshaft position sensor or other phase detector perception and calculate the residing stroke of each cylinder, piston position, moving direction and engine speed; At burning (acting) stroke, behind the engine ignition (referring to Fig. 2), when crank angle reached several angle, water nozzle was according to the instruction water spray (referring to Fig. 3) of ECU (Electrical Control Unit) (ECU or ECM), and injection flow rate is definite in proportion according to fuel injection quantity, and according to the delivery temperature adjustment; The at high temperature instantaneous vaporization of water increases cylinder and presses auxiliary acting, reduces temperature cylinder (referring to Fig. 4) simultaneously; Because the high pressure water temperature that sprays in the cylinder is in subcritical state, under the in-cylinder pressure condition, water temperature improves cylinder-firing pressure far above the instantaneous vaporization of the boiling point of water, under the prerequisite that does not increase fuel injection quantity, improves output torque and power.
The invention is not restricted to the foregoing description, content of the present invention is described all can implement and have described good result.
Claims (6)
1, a kind of subcritical steam auxiliary power gasoline engine comprises: a petrol engine inner-vat sprinkler; This petrol engine inner-vat sprinkler comprises water tank, and ECU (Electrical Control Unit) is electrically connected with ECU (Electrical Control Unit) and by water pump, water rail, water spout and the temperature transducer of ECU (Electrical Control Unit) control; It is characterized in that:
Described water pump is low-pressure pump (7) and water is forced into high-pressure water pump (6) more than the 200bar;
Described low-pressure pump (7) places in the water tank (8), the water intake of low-pressure pump (7) is connected with water tank (8), water outlet is connected by the water intake of water pipe with high-pressure water pump (6), and the water outlet of high-pressure water pump (6) is communicated with the water intake of water rail (1) by high-pressure water pipe (4);
Described water spout (2) is connected by the water outlet of water pipe with water rail (1), and it is indoor that the water orifice of water spout (2) stretches into petrol engine combustion;
Also comprise: one heats water to more than 250 ℃ but is no more than the outlet pipe (18) of 374.2 ℃ petrol engine, and described high-pressure water pipe (4) is communicated with the water intake of water rail (1) after passing this outlet pipe (18) again.
2, by the described subcritical steam auxiliary power gasoline engine of claim 1, it is characterized in that: the exhaust purifier (5) that also is communicated with petrol engine on the described outlet pipe (18).
3, by claim 1 or 2 described subcritical steam auxiliary power gasoline engines, it is characterized in that: in the described high-pressure water pipe (4), one section high-pressure water pipe (4) of passing outlet pipe (5) is shape in the shape of a spiral.
4, by claim 1 or 2 described subcritical steam auxiliary power gasoline engines, it is characterized in that: described temperature transducer (3) is installed on the terminal high-pressure water pipe (4) of outlet pipe (18).
5, by the described subcritical steam auxiliary power gasoline engine of claim 3, it is characterized in that: described temperature transducer (3) is installed on the terminal high-pressure water pipe (4) of outlet pipe (18).
6, by claim 1 or 2 described subcritical steam auxiliary power gasoline engines, it is characterized in that: described petrol engine is a four-stroke gasoline engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101476857A CN101457713A (en) | 2008-11-26 | 2008-11-26 | Subcritical steam auxiliary power gasoline engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101476857A CN101457713A (en) | 2008-11-26 | 2008-11-26 | Subcritical steam auxiliary power gasoline engine |
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| CN101457713A true CN101457713A (en) | 2009-06-17 |
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| CNA2008101476857A Pending CN101457713A (en) | 2008-11-26 | 2008-11-26 | Subcritical steam auxiliary power gasoline engine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454247A (en) * | 2013-09-16 | 2015-03-25 | 邹岳明 | Oil-water hybrid power engine and working method thereof |
| CN106677926A (en) * | 2016-12-09 | 2017-05-17 | 同济大学 | Internal combustion engine structure with superheated water being sprayed into cylinder |
| CN107178440A (en) * | 2017-07-31 | 2017-09-19 | 江苏建筑职业技术学院 | Oil-water engine and control method that a kind of high-efficiency energy-saving ring ensures safety |
| CN107905918A (en) * | 2017-09-07 | 2018-04-13 | 同济大学 | The gasoline engine structure of the double injections of hot water mixing in a kind of outer cold water tank of cylinder |
| WO2018227796A1 (en) * | 2017-06-16 | 2018-12-20 | 中创新核（北京）科技有限公司 | Internal heating steam-boosted engine |
| CN113389624A (en) * | 2021-06-11 | 2021-09-14 | 重庆大学 | Wankel engine and high-temperature water spraying based tail gas waste heat recovery efficient engine structure |
-
2008
- 2008-11-26 CN CNA2008101476857A patent/CN101457713A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454247A (en) * | 2013-09-16 | 2015-03-25 | 邹岳明 | Oil-water hybrid power engine and working method thereof |
| CN106677926A (en) * | 2016-12-09 | 2017-05-17 | 同济大学 | Internal combustion engine structure with superheated water being sprayed into cylinder |
| CN106677926B (en) * | 2016-12-09 | 2019-03-01 | 同济大学 | A kind of Structure of Internal-Combustion Engine of cylinder injection superheated water |
| WO2018227796A1 (en) * | 2017-06-16 | 2018-12-20 | 中创新核（北京）科技有限公司 | Internal heating steam-boosted engine |
| CN107178440A (en) * | 2017-07-31 | 2017-09-19 | 江苏建筑职业技术学院 | Oil-water engine and control method that a kind of high-efficiency energy-saving ring ensures safety |
| CN107178440B (en) * | 2017-07-31 | 2023-04-18 | 江苏建筑职业技术学院 | Efficient, energy-saving, environment-friendly and safe oil-water engine and control method |
| CN107905918A (en) * | 2017-09-07 | 2018-04-13 | 同济大学 | The gasoline engine structure of the double injections of hot water mixing in a kind of outer cold water tank of cylinder |
| CN113389624A (en) * | 2021-06-11 | 2021-09-14 | 重庆大学 | Wankel engine and high-temperature water spraying based tail gas waste heat recovery efficient engine structure |
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Open date: 20090617 |