CN2630506Y - High compression ratio ignition type flexible fuel engine - Google Patents
High compression ratio ignition type flexible fuel engine Download PDFInfo
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- CN2630506Y CN2630506Y CN 03242640 CN03242640U CN2630506Y CN 2630506 Y CN2630506 Y CN 2630506Y CN 03242640 CN03242640 CN 03242640 CN 03242640 U CN03242640 U CN 03242640U CN 2630506 Y CN2630506 Y CN 2630506Y
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- compression ratio
- high compression
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Abstract
The utility model relates to an igniting-type flexible fuel engine with a high compression ratio, which comprises a burning chamber that can realize high compression ratio, an igniting system that employs breakdown igniting principle, an electron control unit (ECU), an oxygen sensor and an oil sprayer. The engine is able to increase the compression ratio maximally, to improve the dynamic performance and the economical efficiency. Moreover, the engine is able to use freely any one among the five fuels of petrol, carbinol, ethanol, random mixture of carbinol and petrol or random mixture of ethanol and petrol.
Description
Technical field
The utility model relates to a kind of high compression ratio Spark ignition type flexible fuel engine, is specifically related at least one intake valve of every cylinder and an exhaust valve, the high compression ratio Spark ignition type flexible fuel engine of Dual Over Head Camshaft.
Background technique
Automobile is the consumption of petroleum resources rich and influential family, and along with increasing sharply and petroleum resources day by day exhausted of automobile pollution, the energy-conservation and substitute fuel problem that solves automobile is the problems of the common concern in countries in the world.
The motor of automobile use at present is mainly diesel engine that uses diesel fuel and the petrol engine that uses Fuel Petroleum.Because fuel characteristic is different, the ignition mode of employing is also different with petrol engine for diesel engine, and diesel engine using is compression-ignited, and petrol engine adopts Spark ignition type.The compression ratio of motor is meant the ratio of the combustion chamber volume the when cylinder total volume when piston is positioned at lower dead center is positioned at top dead center with piston, is an important structure parameter of motor, and the diesel engine compression ratio is generally about 20, and petrol engine is about 10.Common compression ratio height, the thermal efficiency of motor are just high, and the main cause that engine fuel economy is better than petrol engine is exactly the compression ratio height.Solve the power saving of petrol engine, many methods are arranged, and improve compression ratio is the main improvement direction that people seek assiduously always, but because the characteristic of Fuel Petroleum, when compression ratio brings up to one regularly, produce knocking combustion, thereby cause that engine combustion is out of control, local superheating, parts accelerated wear test even damage.Traditional petrol engine (carburetor type) is selected compression ratio according to the operating mode (as the Maximum Torque operating mode) of the easiest generation pinking, generally is up to about 9.And the modern gasoline machine is owing to taked automatical control system, provide certain condition for improving compression ratio, motor can when pinking takes place, be gathered detonation signal by detonation sensor with the higher compression ratios normal combustion under most of operating mode, feed back to electronic control unit (ECU), instruct to spark coil by ECU, postpone ignition advance angle, in order to eliminate pinking, general compression ratio is up to about 11, and the raising of compression ratio is limited.In order further to improve compression ratio, and pinking does not take place in the while, the suggestion that many improvement motors realize that compression ratio improves is proposed at present, for example: described in the Chinese patent that German TK Design Co., Ltd. declares (publication number CN1176678A), have to make several different methods such as the lifting of bent axle phase countercylinder, cylinder variable-length, piston length is variable, variable volume is established in the firing chamber concubine and crank radius be variable.All these methods can both realize improving the purpose of compression ratio, improve power, reduce oil consumption thereby reach, but make engine structure become complicated, and reliability decrease, manufacture cost rises, and does not therefore have a kind ofly really to apply.
Many researchs have been carried out in the alternative motor fuels countries in the world, wherein methyl alcohol and ethanol are one of focus of research as substitute fuel, achievement in research shows: methyl alcohol and ethanol all can be used as the substitute fuel that spark-ignition engine is used, and are the clean fuels more environmentally friendly than gasoline.But the based on fuel characteristic, also there are some unfavorable factors in methyl alcohol, alcohol fuel, as problems such as cold starting difficulty, fuel system are unsound, make and promote and development is restricted.
The purpose of this utility model provides a kind of high compression ratio Spark ignition type flexible fuel engine, this motor can be realized high compression ratio, high ignition energy, improve combustion process, improve combustion efficiency, greatly reduce oil consumption, improve power, and can make this motor choose at random any use that acts as a fuel in five kinds of fuel of any mixing of any mixing of gasoline, methyl alcohol, ethanol, gasoline and methyl alcohol and gasoline and ethanol, overcome and solve the deficiency and the defective of prior art.
The model utility content
In order to achieve the above object, of the present utility model being constructed as follows:
According to an aspect of the present utility model, a kind of high compression ratio Spark ignition type flexible fuel engine is provided, it comprises cylinder 2, firing chamber 12, ignition system, electronic control unit ECU6, lambda sensor 8 and oil sprayer 5, wherein, each cylinder 2 is provided with at least one intake valve 3 and at least one exhaust valve 10, the firing chamber 12 of a bathtub shape of the inside recessed formation in exhaust valve 3 places of cylinder head bottom surface 13, there is a shallow slot 14 to communicate between intake valve 3 and the firing chamber 12, spark plug 11 is arranged near the 12 interior exhaust valves 10 of firing chamber, and the ratio of cylinder total volume and above-mentioned combustion chamber volume is that compression ratio is 12-16.
According on the other hand of the present utility model, a kind of high compression ratio Spark ignition type flexible fuel engine is provided, wherein, described lambda sensor 8 is arranged on the outlet pipe 9 in order to discern the ratio of air fuel, by electronic circuit air fuel ratio is fed back to electronic control unit ECU6, electronic control unit ECU6 handles air fuel ratio subsequently, and sends instruction for oil sprayer 5, to dwindle or to increase the injection time of oil sprayer 5, realize control to air fuel ratio.
According to another aspect of the present utility model, a kind of high compression ratio Spark ignition type flexible fuel engine is provided, wherein, the used fuel of motor is the mixture that the mixture that mixes with the gasoline arbitrary proportion of gasoline, methyl alcohol, ethanol, methyl alcohol or ethanol mix with the gasoline arbitrary proportion.
The utility model has the advantages that need not increase under the prerequisite of cost substantially, make motor realize high compression ratio by optimal design, thereby improvement combustion process, improve combustion efficiency, reduce oil consumption to greatest extent, increase power, reduce discharging, and can use gasoline or methyl alcohol or ethanol or gasoline neatly and methyl alcohol mixes arbitrarily or gasoline and ethanol mix in five kinds of fuel any one arbitrarily.
Description of drawings
Accompanying drawing 1 for simplified schematic greatly represent according to the utility model first embodiment or second example I-I ' sectional structure chart;
Accompanying drawing 2 is first embodiment's cylinder head worm's eye view;
Accompanying drawing 3 is second embodiment's cylinder head worm's eye view;
Accompanying drawing 4 is the FB(flow block) of electric control device ECU control air fuel ratio.
Embodiment
Below with reference to accompanying drawings, the utility model is described in detail.
In the accompanying drawings, 1 is piston, and 2 is cylinder, 3 is intake valve, and 4 is suction tude, and 5 is oil sprayer, 6 is electronic control unit ECU, and 7 is spark coil, and 8 is lambda sensor, 9 is outlet pipe, and 10 is exhaust valve, and 11 is spark plug, 12 is the firing chamber, 13 is the cylinder head bottom surface, and 14 are the guiding shallow slot, and 15 is high voltage wire.
As shown in Figure 1, oil sprayer 5 is positioned on the steam inlet pipe 4, and lambda sensor 8 is positioned on the outlet pipe 9, oil sprayer 5 links to each other with electronic control unit ECU6 respectively with lambda sensor 8, the air fuel ratio numerical value that ECU is gathered according to lambda sensor 8, thus instruction sent to oil sprayer 5, increase or reduce fuel injection quantity.Spark coil 7 links to each other with spark plug 11 by high voltage wire 15, also carries out electricity with electronic control unit ECU6 simultaneously and links to each other, the instruction of reception ECU6, and move according to the instruction of ECU6, for example height of the length of firing time, firing time and ignition energy etc.
Fig. 2 shows an embodiment of the present utility model.Fig. 2 is the worm's eye view of this embodiment's cylinder head, as can be seen from the figure, the cylinder cap of each cylinder 2 is provided with an intake valve 3 and an exhaust valve 10, exhaust valve 10 places of cylinder head bottom surface 13 are the firing chamber 12 of a recessed bathtub shape inwardly, have guiding shallow slot 14 to communicate between intake valve 3 and the firing chamber 12, spark plug 11 is arranged in the firing chamber 12 near the exhaust valves 10.
Fig. 3 shows another embodiment of the present utility model.Fig. 3 is the worm's eye view of this embodiment's cylinder head, as can be seen from the figure, the cylinder cap of each cylinder 2 is provided with two intake valves 3 and two exhaust valves 10, two exhaust valve 10 places of cylinder head bottom surface 13 are the firing chamber 12 of a recessed bathtub shape inwardly, have guiding shallow slot 14 to communicate between intake valve 3 and the firing chamber 12, spark plug 11 is arranged in the firing chamber 12 places near two exhaust valves 10.
Above-mentioned two embodiments' firing chamber 12, structural design are very compact, and flame travel is very short, because the effect of stream and eddy flow of squeezing is accelerated velocity of combustion, thereby can realize using higher compression ratio, and compression ratio can reach 12-16, and don't pinking takes place.
The utility model also adopts the ignition system of perforation ignition principle, the basic functional principle of this system is that sufficiently high ignition energy is stored in the nearest electric capacity of spark plug, in extremely short breakdown phase energy is discharged fast under high voltage, release time, length can be adjusted according to engine operating condition.This system comprises spark coil 7, high voltage wire 15 and spark plug 11.The ignition system of motor use at present, igniting will be experienced puncture, electric arc and aura three phases, and discharge is mainly in the aura stage.The ignition system that the utility model adopts and the ignition system of present use help improving velocity of propagation of flame than having fast characteristics of ignition energy height, discharge time, postpone ignition advance angle, improve compression ratio.
Fig. 4 shows the FB(flow block) of ECU control air fuel ratio.The position at pecked line place is ECU6 among the figure.As can be seen from the figure, crankshaft position sensor links to each other with the crankshaft position data input port of ECU6, and the tach signal that collects is passed to ECU6; Throttle position sensor also is connected with the load signal input port of ECU6 respectively with air inlet pressure sensor, and the load signal of its collection is passed to ECU6; The lambda sensor 8 that is installed on the outlet pipe 9 is connected with the air fuel ratio input signal port of ECU, and its air fuel ratio signal that collects is passed to ECU6; ECU6 is according to above-mentioned data, determine the basic fuel injection pulsewidth, air fuel ratio signal that lambda sensor 8 is gathered and chemically correct fuel λ=14.6 are relatively simultaneously, the basic fuel injection pulsewidth is revised, the instruction with an increase fuel injection pulsewidth of the oil sprayer 5 that is installed on the suction tude is given in λ＞14.6 o'clock, when λ＜14.6, give oil sprayer 5 one instructions that reduce fuel injection pulsewidth, finish control thus to air fuel ratio.
According to above-mentioned ECU control principle, the utility model is fuel used to can be gasoline or methyl alcohol or ethanol or gasoline and methyl alcohol mixes arbitrarily or gasoline and ethanol mix one of five kinds of fuel arbitrarily.In the utility model, by the lambda sensor 8 identification air of on outlet pipe 9, arranging and the ratio of fuel, when air fuel ratio is dense, promptly in the utility model for when the λ＜14.6, feed back to signal of ECU, send instruction after ECU handles, for the oil sprayer that is arranged on the suction tude, shorten injection time, when air-fuel ratio, promptly in the utility model for when the λ＞14.6, allow oil sprayer increase injection time, thereby realization is to the control of air fuel ratio, break away from methyl alcohol, ethanol etc. substitute in the engine fuel popularization process because the influence that the fuel supply system restriction brings makes motor become flexible fuel engine.There is the problem of cold starting difficulty in motor during simultaneously because of use methyl alcohol or alcohol fuel, high compression ratio feature of the present utility model, compression back fuel gas temperature is improved, help cold starting, the utility model adopts the feature of perforation ignition system, has high ignition energy, help cold starting, the feature of the electronic control system that the utility model adopts can realize the accurate control to firing time and ignition energy, helps cold starting.By above-mentioned three features, can solve the cold starting difficult problem that uses methyl alcohol or alcohol fuel motor to exist.
Here description of the present utility model and application are illustrative, are not to want with scope restriction of the present utility model in the above-described embodiments.Here disclosed embodiment's distortion and change are possible, and the various parts of embodiment's actual replacement and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present utility model or substantive characteristics, and the utility model can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.Under the situation that does not break away from the utility model scope and spirit, can carry out other distortion and change here to disclosed embodiment.
Claims (3)
1, a kind of high compression ratio Spark ignition type flexible fuel engine, it comprises cylinder (2), firing chamber (12), ignition system, electronic control unit ECU (6), lambda sensor (8) and oil sprayer (5), it is characterized in that, each cylinder (2) is provided with at least one intake valve (3) and at least one exhaust valve (10), the exhaust valve (3) of cylinder head bottom surface (13) is located the firing chamber (12) of a bathtub shape of inside recessed formation, there is a shallow slot (14) to communicate between intake valve (3) and firing chamber (12), spark plug (11) is arranged near the interior exhaust valve in firing chamber (12) (10), and the ratio of the combustion chamber volume of cylinder total volume and above-mentioned formation is that compression ratio is 12-16.
2. high compression ratio Spark ignition type flexible fuel engine according to claim 1, it is characterized in that, described lambda sensor (8) is arranged on the outlet pipe (9), link to each other with electronic control unit ECU (6) by electronic circuit, and electronic control unit ECU (6) is electrically connected with oil sprayer (5).
3, high compression ratio Spark ignition type flexible fuel engine according to claim 2, it is characterized in that the used fuel of motor is the mixture that the mixture that mixes with the gasoline arbitrary proportion of gasoline, methyl alcohol, ethanol, methyl alcohol or ethanol mix with the gasoline arbitrary proportion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242640 CN2630506Y (en) | 2003-03-28 | 2003-03-28 | High compression ratio ignition type flexible fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242640 CN2630506Y (en) | 2003-03-28 | 2003-03-28 | High compression ratio ignition type flexible fuel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2630506Y true CN2630506Y (en) | 2004-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03242640 Expired - Fee Related CN2630506Y (en) | 2003-03-28 | 2003-03-28 | High compression ratio ignition type flexible fuel engine |
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| CN (1) | CN2630506Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825032A (en) * | 2009-03-02 | 2010-09-08 | 浙江飞亚电子有限公司 | Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine |
| CN107208558A (en) * | 2015-01-19 | 2017-09-26 | 马自达汽车株式会社 | Flexible fuel engine |
-
2003
- 2003-03-28 CN CN 03242640 patent/CN2630506Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825032A (en) * | 2009-03-02 | 2010-09-08 | 浙江飞亚电子有限公司 | Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine |
| CN107208558A (en) * | 2015-01-19 | 2017-09-26 | 马自达汽车株式会社 | Flexible fuel engine |
| CN107208558B (en) * | 2015-01-19 | 2019-12-13 | 马自达汽车株式会社 | Flexible fuel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040804 |