CN102979618A - Self-starting two-stroke engine - Google Patents
Self-starting two-stroke engine Download PDFInfo
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- CN102979618A CN102979618A CN2012104592593A CN201210459259A CN102979618A CN 102979618 A CN102979618 A CN 102979618A CN 2012104592593 A CN2012104592593 A CN 2012104592593A CN 201210459259 A CN201210459259 A CN 201210459259A CN 102979618 A CN102979618 A CN 102979618A
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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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Abstract
The invention discloses a self-starting two-stroke engine which comprises an opposed-piston two-stroke engine, wherein an air supply valve is arranged on a cylinder wall, and the cylinder wall is arranged between a scavenging air inlet and a scavenging air outlet which are arranged on the opposed-piston two-stroke engine. The air supply valve is controlled by a control mechanism and is opened during the gas compression process when the engine is started. The self-starting two-stroke engine is capable of starting normally without a mechanical air booster, simplifying the structure of the engine, reducing size of the engine and manufacturing cost, and effectively saving starting energy consumption of the engine and has wide application prospects.
Description
Technical field
The present invention relates to heat energy and power field, especially a kind of two stroke engine.
Background technique
Traditional two stroke engine all need arrange the startup that mechanical supercharger could be realized motor, and this just makes system complex inevitably, rate of fault is high, cost is high.Therefore, need a kind of simple in structure, two stroke engine of not adopting mechanical supercharger just can start of invention.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of self-starting two stroke engine, in the situation that need not the mechanical air pressurized machine, can finish the self-starting of motor, concrete technological scheme is as follows:
A kind of self-starting two stroke engine, comprise the opposed pistons two stroke engine, establish steam supply valve at the scavenging suction port of described opposed pistons two stroke engine and the cylinder wall between the scavenging relief opening, open in the gas compression processes of the controlled mechanism controls of described steam supply valve when this engine start.
The seat of the described steam supply valve mouthful upper air supply duct that connects, described air supply duct is communicated with the distribution road of described opposed pistons two stroke engine, and the gas outlet direction of described air supply duct is pointed to as overall take the gas flow direction in the described distribution road.
The gas access of the intake duct of described opposed pistons two stroke engine is communicated with the gas outlet of impeller gas compressor, the gas outlet of the air outlet flue of described opposed pistons two stroke engine is communicated with the gas access of power turbine, and described power turbine is to described impeller gas compressor outputting power.
Cylinder wall between described scavenging suction port and described scavenging relief opening is established fuel inlet and spark plug.
A kind of self-starting two stroke engine comprises the uniflow scavenging two stroke engine, establishes steam supply valve in the cylinder head of described uniflow scavenging two stroke engine, opens in the gas compression processes of the controlled mechanism controls of described steam supply valve when this engine start.
The seat of the described steam supply valve mouthful upper air supply duct that connects, described air supply duct is communicated with the distribution road of described uniflow scavenging two stroke engine, and the gas outlet direction of described air supply duct is pointed to as overall take the gas flow direction in the described distribution road.
In the structure that comprises described uniflow scavenging two stroke engine, perhaps comprising that described uniflow scavenging two stroke engine arranges in the structure of described air supply duct simultaneously, selectable, the gas access of the intake duct of described uniflow scavenging two stroke engine is communicated with the gas outlet of impeller gas compressor, the gas outlet of the air outlet flue of described uniflow scavenging two stroke engine is communicated with the gas access of power turbine, and described power turbine is to described impeller gas compressor outputting power.
In the structure that comprises described uniflow scavenging two stroke engine, perhaps comprising that described uniflow scavenging two stroke engine arranges in the structure of described air supply duct simultaneously, selectable, establish fuel inlet and spark plug in described cylinder head.
In described distribution road Jet injector is set, described air supply duct is communicated with the motive fluid jetburner of described Jet injector, and the fluid output direction of described Jet injector is pointed to as overall take the gas flow direction in the described distribution road.
Described distribution road is made as air outlet flue, establishes fuel inlet and spark plug at the described air outlet flue in the gas outlet downstream of described air supply duct.
At described air supply duct control valve is set; In the structure of described control valve was set, selectable, the described air supply duct between described control valve and described steam supply valve was established gas reservoir.
Described steam supply valve is made as unidirectional external-open valve.
Principle of the present invention is: by on the cylinder wall of described opposed pistons two stroke engine or the steam supply valve of controlled mechanism controls is set in the cylinder head of described uniflow scavenging two stroke engine, so that in the gas compression processes when engine start, described control mechanism is controlled described steam supply valve and is opened, a part of gas in the cylinder is derived from described steam supply valve, one gas that can utilize this part to derive drives more gas and enters in the cylinder, realizes the purpose of scavenging; The gas that two gases that can utilize this part to derive drive in the air outlet flue is discharged more quickly, and mineralization pressure falls in air outlet flue, sucks more live gass, realizes the purpose of scavenging; The 3rd, because deriving the pressure that can make in the expansion stroke cylinder in latter stage, obviously reduces this portion gas, inhale fresh air is realized the purpose of scavenging; And then realization does not have the startup of the prerequisite following two punch journey motor of mechanical supercharger.
Among the present invention, the opposed pistons two stroke engine that described opposed pistons two stroke engine is traditional sense, include piston and the air distribution port (including suction port and relief opening) of cylinder liner, two opposed types, opposed pistons is located in the cylinder liner, and air distribution port is located at respectively on the cylinder jacket wall; The passage that is communicated with air distribution port is distribution road (comprising intake duct and air outlet flue).
Among the present invention, the uniflow scavenging two stroke engine that described uniflow scavenging two stroke engine is traditional sense, include cylinder liner, cylinder head, piston and air distribution port (including suction port and relief opening), cylinder liner is fixedly connected with cylinder head, piston is located in the cylinder liner, and suction port and relief opening are located at respectively on cylinder jacket wall or the cylinder head; The passage that is communicated with air distribution port is distribution road (comprising intake duct and air outlet flue).
Among the present invention, in described intake duct or described air outlet flue, described Jet injector is set, and with in the gas outlet of described air supply duct and the structure that the motive fluid jetburner of described Jet injector is communicated with, can in the distribution road at described Jet injector place, form jet action, thereby accelerate the airspeed in this distribution road, strengthen the scavenging effect.
Among the present invention, so-called " power turbine " refers to utilize the gas flow impeller power machine structure of external outputting power that expands.
Among the present invention, so-called " impeller gas compressor " refers to the device that all utilize impeller that gas is compressed, and such as centrifugal compressor, axial flow compressor etc., it can be single-stage, multistage, also can be that a plurality of single-stages or a plurality of multistage-combination form.
Among the present invention, so-called " Jet injector " refers to by the non-motive fluid of motive fluid injection, the device that two fluid interactions are discharged from an outlet, and so-called Jet injector can be gas jet pump (being jet pump), also can be liquid-jet pump; So-called Jet injector can be traditional Jet injector, also can be non-traditional Jet injector.
Among the present invention, so-called " traditional Jet injector " refers to be made of the pipe that two suits arrange, provide the high voltage power fluid to inner tube, inner tube high voltage power fluid sprays within the outer tube, makes other fluids between the inner and outer pipes (fluid that enters from outer tube) produce the device that moves along the injection direction of inner tube high voltage power fluid under the acting in conjunction of inner tube high voltage power Fluid injection and outer tube; The outer tube of so-called Jet injector can have the reducing and expansion district, and outer tube can be made as Venturi tube, and the inner tube nozzle can be made as Laval nozzle, and so-called reducing and expansion district refers to the zone that section area changes in the outer tube; Described Jet injector has three interfaces at least or claims passage, i.e. motive fluid jetburner, low-pressure fluid entrance and fluid output.
Among the present invention, so-called " non-traditional Jet injector " refers to be made of two or more mutual sheathing settings or the pipe that mutually is set up in parallel, wherein at least one pipe is communicated with the kinetic current body source, and dynamafluidal the flowing in the kinetic current body source can cause that the fluid in other pipes produces the device of directional flow; The pipe of so-called Jet injector can have the reducing and expansion district, can be made as Venturi tube, and the nozzle of pipe can be made as Laval nozzle, and so-called reducing and expansion district is the zone that section area changes in the vial; Described Jet injector has three interfaces at least or claims passage, i.e. motive fluid jetburner, low-pressure fluid entrance and fluid output; Described Jet injector can comprise a plurality of motive fluid jetburners, in the structure that comprises a plurality of motive fluid jetburners, described motive fluid jetburner can be arranged in the pipeline center district of described low-pressure fluid entrance, also can be arranged near the tube wall of described low-pressure fluid entrance, described motive fluid jetburner also can be the annular spray mouth around described low-pressure fluid inlet pipe wall.
Among the present invention, described Jet injector comprises the Multi-stage jet pump, multiple jets pump and Pulsed Jet Pump etc.
Among the present invention, establish fuel inlet and spark plug at the scavenging suction port of described opposed pistons two stroke engine and the cylinder wall between the scavenging relief opening, or establish fuel inlet and spark plug in the cylinder head of described uniflow scavenging two stroke engine, for the starting time of saving motor and the reliability that strengthens the motor self-starting, by in cylinder, spraying into fire fuel (such as gasoline in the compression process when the engine start, rock gas etc.) also igniting, can form the gas of elevated pressures after the fuel combustion blast, thereby be conducive to the faster more reliably startup of motor; Wherein, for diesel engine, because diesel oil is to adopt the mode of compression ignite to burn, so described fuel inlet and spark plug need add, and described fuel inlet only is used for the conveying of fire fuel; For petrol engine, because gasoline is to adopt the mode of lighting to burn, so described fuel inlet and spark plug also can directly be made as fuel inlet and the spark plug of engine chamber.
Among the present invention, described control valve is used for regulating and control the gas pressure of the gas outlet of described air supply duct.
Among the present invention, described gas reservoir is used for storing the gas of described air supply duct feed, regulates and control the gas pressure of the gas outlet of described air supply duct by described control valve again.
Among the present invention, according to the known technology of engine art, establish necessary parts, unit and system in the place of necessity.
Among the present invention, the angle α that so-called " gas flow direction of the gas outlet direction of described air supply duct in the described distribution road pointed to as overall " refers to the gas outlet direction of described air supply duct and the gas flow direction in the described distribution road more than or equal to 0 °, less than 90 °, the position of described angle α is referring to accompanying drawing 16, wherein the x direction represents the gas flow direction in the described distribution road, and the y direction represents the gas outlet direction of described air supply duct; In like manner, so-called " gas flow direction of the gas outlet direction of described Jet injector in the described distribution road pointed to as overall " angle β of referring to the gas outlet direction of described Jet injector and the gas flow direction in the described distribution road more than or equal to 0 °, less than 90 °.
Beneficial effect of the present invention is as follows:
Self-starting two stroke engine disclosed in this invention is for existing opposed pistons two stroke engine or existing uniflow scavenging two stroke engine, can in the situation of not using the mechanical supercharged device, normally start, simplified the structure of motor and reduced volume, reduced cost of production, effectively saved the startup energy consumption of motor, had broad application prospects.
Description of drawings
Shown in Figure 1 is the structural representation of the embodiment of the invention 1;
Shown in Figure 2 is the structural representation of the embodiment of the invention 2;
Shown in Figure 3 is the structural representation of the embodiment of the invention 3;
Shown in Figure 4 is the structural representation of the embodiment of the invention 4;
Shown in Figure 5 is the structural representation of the embodiment of the invention 5;
Shown in Figure 6 is the structural representation of the embodiment of the invention 6;
Shown in Figure 7 is the structural representation of the embodiment of the invention 7;
Shown in Figure 8 is the structural representation of the embodiment of the invention 8;
Shown in Figure 9 is the structural representation of the embodiment of the invention 9;
Shown in Figure 10 is the structural representation of the embodiment of the invention 10;
Shown in Figure 11 is the structural representation of the embodiment of the invention 11;
Shown in Figure 12 is the structural representation of the embodiment of the invention 12;
Shown in Figure 13 is the structural representation of the embodiment of the invention 13;
Shown in Figure 14 is the structural representation of the embodiment of the invention 14;
Shown in Figure 15 is the structural representation of the embodiment of the invention 15;
Figure 16 is the position view of the angle α of the gas outlet direction of described air supply duct and the gas flow direction in the described distribution road.
Among the figure:
1 opposed pistons two stroke engine, 2 scavenging suction ports, 3 intake ducts, 4 air outlet flues, 5 impeller gas compressors, 6 power turbines, 7 steam supply valves, 8 control mechanisms, 9 air supply ducts, 10 Jet injectors, 11 spark plugs, 12 control valves, 13 gas reservoir, 14 fuel nozzles, 15 scavenging relief openings, 16 uniflow scavenging two stroke engines, 17 cylinder head.
Embodiment
Embodiment 1
Self-starting two stroke engine as shown in Figure 1, comprise opposed pistons two stroke engine 1, establish steam supply valve 7 at the scavenging suction port 2 of described opposed pistons two stroke engine 1 and the cylinder wall between the scavenging relief opening 15, open in the gas compression processes when described steam supply valve 7 controlled mechanisms 8 are controlled at this engine start.
In the present embodiment, described steam supply valve 7 is made as unidirectional external-open valve, and as mode of execution that can conversion, described steam supply valve 7 can be made as other forms.
When motor begins to start, two pistons of described opposed pistons two stroke engine 1 all move so that gas in the cylinder is compressed to cylinder axis, steam supply valve 7 described in this process can whole process under the control of described control mechanism 8 or part-time in open, reduce the at the volley resistance of suffered pressurized gas of described piston, therefore avoid using mechanical supercharger to drive described piston and move to cylinder axis; When described piston during to two end motion of cylinder described steam supply valve 7 close, form negative pressure this moment in described cylinder, when described piston movement during to described scavenging suction port 2 and described scavenging relief opening 15 enable possition, fresh air since the effect of negative pressure enter and to carrying out scavenging in the cylinder from described scavenging suction port 2 rapidly in a large number, described piston compresses to the cylinder axis motion and to fresh air in the cylinder again subsequently, enter next circulation, thereby realize the startup of this motor.
Behind this engine start, described steam supply valve 7 cuts out under the control of described control mechanism 8, and then described self-starting two stroke engine works as tradition opposed pistons two stroke engine, until when starting next time, again enable described steam supply valve 7.Generally speaking, 7 of described steam supply valves are enabled in engine start, under the engine work state, keep closing, thereby realized ato unit in the situation of having omitted mechanical supercharger, do not affect the normal operation of motor, simplified motor structure, reduced volume and reduced cost of production, and can effectively save the startup energy consumption of motor.
Self-starting two stroke engine as shown in Figure 2, its difference with embodiment 1 is: the gas access of the intake duct 3 of described opposed pistons two stroke engine 1 is communicated with the gas outlet of impeller gas compressor 5, the gas outlet of the air outlet flue 4 of described opposed pistons two stroke engine 1 is communicated with the gas access of power turbine 6,6 pairs of described impeller gas compressor 5 outputting powers of described power turbine, the seat of the described steam supply valve 7 mouthful upper air supply duct 9 that connects, described air supply duct 9 is communicated with the distribution road of described opposed pistons two stroke engine 1, and the gas outlet direction of described air supply duct 9 is pointed to as overall take the gas flow direction in the described distribution road.
In the present embodiment, described distribution road is made as intake duct 3, the gas outlet direction of described air supply duct 9 is identical with gas flow direction in the described intake duct 3, and namely the angle α of the gas outlet direction of described air supply duct 9 and the gas flow direction in the described intake duct 3 equals 0 °; As mode of execution that can conversion, the angle α of the gas flow direction in the gas outlet direction of described air supply duct 9 and the described intake duct 3 can select more than or equal to 0 °, less than any numerical value of 90 °, such as 45 °, point to as overall take the gas flow direction in the described intake duct 3 with the gas outlet direction that satisfies described air supply duct 9.In order to obtain better injection effect, the angle α of gas flow direction is the smaller the better in the gas outlet direction of described air supply duct 9 and the described intake duct 3, such as below 10 ° or below 5 °.
Because the gas in the described air supply duct 9 is the gas of compressed mistake, therefore its pressure will be higher than the gas pressure in the described intake duct 3, when described air supply duct 9 is communicated with described intake duct 3, and the gas flow direction of the gas outlet direction of described air supply duct 9 in the described intake duct 3 is during for overall sensing, described air supply duct 9 has played the effect of Jet injector in described intake duct 3, namely use the motive fluid of the motive fluid injection relatively low pressure of relatively high pressure, thereby drive more fresh air and enter cylinder from described intake duct 3, so that scavenging process is more thorough.
As mode of execution that can conversion, described distribution road can also be made as air outlet flue 4, the angle α of the gas flow direction in the gas outlet direction of described air supply duct 9 and the described air outlet flue 4 can select more than or equal to 0 °, less than any numerical value of 90 °, such as 45 °, point to as overall take the gas flow direction in the described air outlet flue 4 with the gas outlet direction that satisfies described air supply duct 9.In order to obtain better injection effect, the angle α of gas flow direction is the smaller the better in the gas outlet direction of described air supply duct 9 and the described air outlet flue 4, such as below 10 ° or below 5 °; Described air supply duct 9 can not established, and perhaps, described impeller gas compressor 5 and described power turbine 6 can not established, and namely described air supply duct 9 can arrange simultaneously with the structure of described impeller gas compressor 5 and described power turbine 6.
Self-starting two stroke engine as shown in Figure 3, itself and embodiment's 2 difference is: establish Jet injector 10 in described intake duct 3, described air supply duct 9 is communicated with the motive fluid jetburner of described Jet injector 10, and the fluid output direction of described Jet injector 10 is pointed to as overall take the gas flow direction in the described intake duct 3.
In this enforcement, the fluid output direction of described Jet injector 10 is identical with gas flow direction in the described intake duct 3, and namely the angle β of the interior gas flow direction of the fluid output direction of described Jet injector 10 and described intake duct 3 equals 0 °; As mode of execution that can conversion, in the fluid output direction of described Jet injector 10 and the described intake duct 3 the angle β of gas flow direction can select more than or equal to 0 °, less than any numerical value of 90 °, such as 45 °, point to as overall take the gas flow direction in the described intake duct 3 with the fluid output direction that satisfies described Jet injector 10.In order to obtain better injection effect, the angle β of gas flow direction is the smaller the better in the fluid output direction of described Jet injector 10 and the described intake duct 3, such as below 10 ° or below 5 °.
For embodiment 2, the setting of described Jet injector 10 more one goes on foot the jet effect that has strengthened in the described intake duct 3, thereby can further strengthen scavenge effect.
In all described air supply ducts 9 and the mode of execution that described intake duct 3 is communicated with, can described Jet injector 10 be set with reference to present embodiment among the present invention.
Self-starting two stroke engine as shown in Figure 4, itself and embodiment's 3 difference is: at described air supply duct 9 control valve 12 is set.
Described control valve 12 can be used for adjusting the gas pressure of the gas outlet of described air supply duct 9.
All arrange in the mode of execution of described air supply duct 9 among the present invention, can described control valve 12 be set with reference to present embodiment.
Self-starting two stroke engine as shown in Figure 5, itself and embodiment's 4 difference is: the described air supply duct 9 between described control valve 12 and described steam supply valve 7 is established gas reservoir 13.
Described gas reservoir 13 is used for storing the gas of described air supply duct 9 feeds, and adjusts the gas pressure of the gas outlet of described air supply duct 9 by described control valve 12.
Self-starting two stroke engine as shown in Figure 6, itself and embodiment's 5 difference is: the cylinder wall between described scavenging suction port 2 and described scavenging relief opening 15 is established spark plug 11 and as the fuel nozzle 14 of described fuel inlet.
In the present embodiment, even if the setting of described fuel nozzle 14 and described spark plug 11 is also can burn for the pressure and temperature in cylinder in start-up course is lower than in the situation of the desired temperature and pressure of compression ignite, thereby improve the reliability that starts, if present embodiment motor diesel engine, can be in cylinder, spraying into fire fuel (such as gasoline, rock gas etc.) by described fuel nozzle 14 when starting, and light by described spark plug 11, thereby reach the purpose of reliable startup; When the present embodiment motor is petrol engine, also can realize reliable the startup by said method, in addition, because gasoline itself belongs to fire fuel, therefore, also can directly adopt fuel inlet and spark plug on the engine chamber to finish this purpose.
Of the present invention all comprise in the mode of execution of described opposed pistons two stroke engine 1, can described fuel nozzle 14 and described spark plug 11 be set with reference to present embodiment.
Embodiment 7
Self-starting two stroke engine as shown in Figure 7, itself and embodiment's 2 difference is: described distribution road is made as air outlet flue 4.
In like manner, described air supply duct 9 also plays the effect of similar Jet injector in described air outlet flue 4, thereby drives the gas Accelerating Removal in the described air outlet flue 4, has namely accelerated the discharge of waste gas in the cylinder, is conducive to the scavenging exhaust; Because the Accelerating Removal of waste gas, the fresh air in the intake duct 3 of described opposed pistons two stroke engine 1 is also accelerated to enter cylinder, thereby so that scavenging process is more thorough, is easier to the startup of motor.
Self-starting two stroke engine as shown in Figure 8, itself and embodiment's 6 difference is: establish Jet injector 10 in described air outlet flue 4, described air supply duct 9 is communicated with the motive fluid jetburner of described Jet injector 10, and the fluid output direction of described Jet injector 10 is pointed to as overall take the gas flow direction in the described air outlet flue 4.
In like manner, the setting of described Jet injector 10 has also strengthened the jet action in the described air outlet flue 4, has further strengthened the reliability of engine start.
In this enforcement, the fluid output direction of described Jet injector 10 is identical with gas flow direction in the described air outlet flue 4, and namely the angle β of the interior gas flow direction of the fluid output direction of described Jet injector 10 and described air outlet flue 4 equals 0 °; As mode of execution that can conversion, in the fluid output direction of described Jet injector 10 and the described air outlet flue 4 the angle β of gas flow direction can select more than or equal to 0 °, less than any numerical value of 90 °, such as 45 °, point to as overall take the gas flow direction in the described air outlet flue 4 with the fluid output direction that satisfies described Jet injector 10.In order to obtain better injection effect, the angle β of gas flow direction is the smaller the better in the fluid output direction of described Jet injector 10 and the described air outlet flue 4, such as below 10 ° or below 5 °.
In all described air supply ducts 9 and the mode of execution that described air outlet flue 4 is communicated with, can described Jet injector 10 be set with reference to present embodiment among the present invention.
Self-starting two stroke engine as shown in Figure 9, itself and embodiment's 8 difference is:
At described air supply duct 9 control valve 12 is set.
Described control valve 12 can be used for adjusting the gas pressure of the gas outlet of described air supply duct 9.
Self-starting two stroke engine as shown in figure 10, itself and embodiment's 9 difference is: establish gas reservoir 13 between the air supply duct 9 between described control valve 12 and the described steam supply valve 7.
Described gas reservoir 13 is used for storing the gas of described air supply duct 9 feeds, and adjusts the gas pressure of the gas outlet of described air supply duct 9 by described control valve 12.
Self-starting two stroke engine as shown in figure 11, itself and embodiment's 10 difference is:
Cylinder wall between described scavenging suction port 2 and described scavenging relief opening 15 is established spark plug 11 and is sprayed into the fuel nozzle 14 of fire fuel as fuel inlet.
Self-starting two stroke engine as shown in figure 12, itself and embodiment's 10 difference is:
Described air outlet flue 4 in the gas outlet downstream of described air supply duct 9 is established fuel inlet and spark plug 11.
During implementation, described fuel inlet is made as be used to the fuel nozzle 14 that sprays into fire fuel.
Described fuel nozzle 14 in the present embodiment and the purpose of described spark plug 11 are so that the gas of fire fuel in described air outlet flue 4 burns, the gas of high pressure does work to described power turbine 6 to form more, and then drive 5 pairs of air inlets of described impeller gas compressor and compress, to realize the purpose of faster startup.
Self-starting two stroke engine as shown in figure 13, comprise uniflow scavenging two stroke engine 16, cylinder head 17 at described uniflow scavenging two stroke engine 16 is established steam supply valve 7, opens in the gas compression processes when described steam supply valve 7 controlled mechanisms 8 are controlled at this engine start.
Self-starting two stroke engine as shown in figure 14, its difference with embodiment 13 is: the gas access of the intake duct 3 of described uniflow scavenging two stroke engine 16 is communicated with the gas outlet of impeller gas compressor 5, the gas outlet of the air outlet flue 4 of described uniflow scavenging two stroke engine 16 is communicated with the gas access of power turbine 6,6 pairs of described impeller gas compressor 5 outputting powers of described power turbine; Be connected with air supply duct 9 on the seat mouth of described steam supply valve 7, described air supply duct 9 is communicated with the intake duct 3 of described uniflow scavenging two stroke engine 16, and the gas outlet direction of described air supply duct 9 is pointed to as overall take the gas flow direction in the described intake duct 3.Fuel inlet and spark plug 11 on described cylinder head 17.
During implementation, described fuel inlet is made as be used to the fuel nozzle 14 that sprays into fire fuel.
In the present embodiment, the gas outlet direction of described air supply duct 9 is identical with gas flow direction in the described intake duct 3, and namely the angle α of the gas outlet direction of described air supply duct 9 and the gas flow direction in the described intake duct 3 equals 0 °; As mode of execution that can conversion, the angle α of the gas flow direction in the gas outlet direction of described air supply duct 9 and the described intake duct 3 can select more than or equal to 0 °, less than any numerical value of 90 °, such as 45 °, point to as overall take the gas flow direction in the described intake duct 3 with the gas outlet direction that satisfies described air supply duct 9.In order to obtain better injection effect, the angle α of gas flow direction is the smaller the better in the gas outlet direction of described air supply duct 9 and the described intake duct 3, such as below 10 ° or below 5 °.
As mode of execution that can conversion, described air supply duct 9 can not established, perhaps, described impeller gas compressor 5 and described power turbine 6 can not established, perhaps, described fuel inlet and described spark plug 11 can not established, and namely described air supply duct 9 can arrange simultaneously with the structure of described impeller gas compressor 5 and the structure of described power turbine 6, described fuel inlet and described spark plug 11.
Self-starting two stroke engine as shown in figure 15, itself and embodiment's 14 difference is: at the described intake duct 3 interior Jet injectors 10 that arrange, described air supply duct 9 is communicated with the motive fluid jetburner of described Jet injector 10, the fluid output direction of described Jet injector 10 is pointed to as overall take the gas flow direction in the described intake duct 3, at described air supply duct 9 control valve 12 is set.
During implementation, all right reference example 6 or embodiment 7, the described air supply duct 9 between described control valve 12 and described steam supply valve 7 is established gas reservoir 13.Described gas reservoir 13 is used for storing the gas of described air supply duct 9 feeds, and adjusts the gas pressure of the gas outlet of described air supply duct 9 by described control valve 12.
The fluid output direction of described Jet injector 10 is identical with gas flow direction in the described intake duct 3, and namely the angle β of the interior gas flow direction of the fluid output direction of described Jet injector 10 and described intake duct 3 equals 0 °; As mode of execution that can conversion, in the fluid output direction of described Jet injector 10 and the described intake duct 3 the angle β of gas flow direction can select more than or equal to 0 °, less than any numerical value of 90 °, such as 45 °, point to as overall take the gas flow direction in the described intake duct 3 with the fluid output direction that satisfies described Jet injector 10.In order to obtain better injection effect, the angle β of gas flow direction is the smaller the better in the fluid output direction of described Jet injector 10 and the described intake duct 3, such as below 10 ° or below 5 °.
As mode of execution that can conversion, described control valve 12 can not established, and perhaps, described Jet injector 10 can not established, and namely described control valve 12 needn't arrange simultaneously with described Jet injector 10.
During implementation, selectively, can reference example 7, described air supply duct 9 changed into the air outlet flue 4 of described uniflow scavenging two stroke engine 16 be communicated with, and the gas flow direction of the gas outlet direction of described air supply duct 9 in the described air outlet flue 4 are for overall sensing; Also can be nearer a step ground reference example 8, at described air outlet flue 4 Jet injector 10 is set, and described air supply duct 9 is communicated with the motive fluid jetburner of described Jet injector 10, and the gas flow direction of the fluid output direction of described Jet injector 10 in the described air outlet flue 4 are for overall sensing; Also can be again reference example 12 further, described air outlet flue 4 in the gas outlet downstream of described Jet injector 10 is established fuel inlet and spark plug 11, obtain behind the higher pressure described power turbine 6 to be done work so that exhaust is further burnt, thereby improve the utilization ratio of exhaust.Optionally, can also gas reservoir 13 be set at described air supply duct 9; When the described self-starting two stroke engine of present embodiment is diesel engine, in order to improve the reliability of its startup, can set up an office in the cylinder head 17 of described uniflow scavenging two stroke engine 16 and fire fuel inlet (such as gasoline spraying nozzle, gas spraying loophole etc.) and spark plug 11, oil spout igniting in the compression process when starting is to be easy to the startup of motor.
Obviously, the invention is not restricted to above embodiment, according to known technology and the technological scheme disclosed in this invention of related domain, can derive or association goes out many flexible programs, all these flexible programs also should be thought protection scope of the present invention.
Claims (10)
1. self-starting two stroke engine, comprise opposed pistons two stroke engine (1), it is characterized in that: establish steam supply valve (7) at the scavenging suction port (2) of described opposed pistons two stroke engine (1) and the cylinder wall between the scavenging relief opening (15), open in the gas compression processes when the controlled mechanism of described steam supply valve (7) (8) is controlled at this engine start.
2. self-starting two stroke engine as claimed in claim 1, it is characterized in that: the seat of described steam supply valve (7) mouthful upper air supply duct (9) that connects, described air supply duct (9) is communicated with the distribution road of described opposed pistons two stroke engine (1), and the gas outlet direction of described air supply duct (9) is pointed to as overall take the gas flow direction in the described distribution road.
3. self-starting two stroke engine as claimed in claim 1 or 2, it is characterized in that: the gas access of the intake duct (3) of described opposed pistons two stroke engine (1) is communicated with the gas outlet of impeller gas compressor (5), the gas outlet of the air outlet flue (4) of described opposed pistons two stroke engine (1) is communicated with the gas access of power turbine (6), and described power turbine (6) is to described impeller gas compressor (5) outputting power.
4. self-starting two stroke engine as claimed in claim 1 or 2, it is characterized in that: the cylinder wall between described scavenging suction port (2) and described scavenging relief opening (15) is established fuel inlet and spark plug (11).
5. self-starting two stroke engine, comprise uniflow scavenging two stroke engine (16), it is characterized in that: the cylinder head (17) at described uniflow scavenging two stroke engine (16) is established steam supply valve (7), opens in the gas compression processes when the controlled mechanism of described steam supply valve (7) (8) is controlled at this engine start.
6. self-starting two stroke engine as claimed in claim 5, it is characterized in that: the seat of described steam supply valve (7) mouthful upper air supply duct (9) that connects, described air supply duct (9) is communicated with the distribution road of described uniflow scavenging two stroke engine (16), and the gas outlet direction of described air supply duct (9) is pointed to as overall take the gas flow direction in the described distribution road.
7. such as self-starting two stroke engine as described in claim 2 or 6, it is characterized in that: Jet injector (10) is set in described distribution road, described air supply duct (9) is communicated with the motive fluid jetburner of described Jet injector (10), and the fluid output direction of described Jet injector (10) is pointed to as overall take the gas flow direction in the described distribution road.
8. such as self-starting two stroke engine as described in claim 2 or 6, it is characterized in that: described distribution road is made as air outlet flue (4), establishes fuel inlet and spark plug (11) at the described air outlet flue (4) in the gas outlet downstream of described air supply duct (9).
9. such as self-starting two stroke engine as described in claim 2 or 6, it is characterized in that: at described air supply duct (9) control valve (12) is set.
10. such as self-starting two stroke engine as described in each in the claim 1,2,5,6, it is characterized in that: described steam supply valve (7) is made as unidirectional external-open valve.
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| CN2012104592593A CN102979618A (en) | 2011-11-19 | 2012-11-14 | Self-starting two-stroke engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110369981.3 | 2011-11-19 | ||
| CN201110369981 | 2011-11-19 | ||
| CN2012104592593A CN102979618A (en) | 2011-11-19 | 2012-11-14 | Self-starting two-stroke engine |
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| CN102979618A true CN102979618A (en) | 2013-03-20 |
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| CN105723076A (en) * | 2013-11-08 | 2016-06-29 | 阿凯提兹动力公司 | Cold-start strategies for opposed-piston engines |
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