CN202707223U - Two-stroke diesel engine - Google Patents
Two-stroke diesel engine Download PDFInfo
- Publication number
- CN202707223U CN202707223U CN2012203789769U CN201220378976U CN202707223U CN 202707223 U CN202707223 U CN 202707223U CN 2012203789769 U CN2012203789769 U CN 2012203789769U CN 201220378976 U CN201220378976 U CN 201220378976U CN 202707223 U CN202707223 U CN 202707223U
- Authority
- CN
- China
- Prior art keywords
- piston
- valve
- air
- suction
- diesel engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model relates to a two-stroke diesel engine, comprising a cylinder sleeve, an exhaust pipe and a piston. The two-stroke diesel engine is characterized in that the exterior of the cylinder sleeve is provided with an air inlet pipe in which fresh air with certain pressure exists; the air inlet pipe is communicated with air inlets in the cylinder sleeve through an air inlet passage; an air inlet valve capable of opening or closing an air inlet valve port is arranged at the air inlet valve port in the air inlet passage; before a piston moves downwardly till that piston rings approach the upper edges of the air inlets, an exhaust valve is opened for the exhaust of waste gas; when the piston continuously moves downwardly till that the air inlets are communicated with the inner cavity of a cylinder sleeve at the upper part of the piston, the exhaust valve is opened for allowing the fresh air to further press for the exhaust of waste gas; and before the piston moves upwardly till the piston rings approach the upper edges of the air inlets, the exhaust valve is closed and then the air inlet valve is closed. The air inlets prevent the fresh air with the certain pressure from entering a machine cavity through the air inlet valve arranged at the air inlet passage; therefore, even when the piston leaves far away from the air inlets during the moving process, no fresh air leaks into the lower machine cavity through the air inlets; in addition, the piston is not required to be lengthened additionally, but still can move to a position far away from the air inlets; and in such a way, the stroke of the piston is lengthened greatly.
Description
Technical field
The utility model relates to a kind of diesel engine, relates in particular to a kind of two stroke diesel engine.
Background technique
Diesel engine has four-stroke and two stroke diesel engine according to spm, and the two stroke diesel engine in usefulness mainly contains two kinds of structures at present: a kind of is loop scavenging, and another kind is uniflow scavenging.
Loop-scavenged characteristics are apneustic device, and are simple in structure.Be a kind of diesel engine structure the Chinese invention patent " the exhaust valve type two stroke diesel engine of supercharging cross flow scavenging " of ZL02140885.8 (publication number is CN1415846A) has disclosed such as a patent No..But because loop-scavenged structure is that porting has porting in cylinder sleeve cylinder barrel side, a side has been advanced, a side exhaust.This structure can produce part waste gas in the above piston cavity of porting and sweep untotally, and fresh air is not enough, causes the fuel oil consumption to increase.And having entered now the energy-conservation epoch, the diesel engine of this structure has been eliminated by market.
Uniflow scavenged structure is to have inlet hole at cylinder sleeve cylinder barrel downside, and relief opening then is arranged on the cylinder head at cylinder sleeve top.Waste gas is swept very totally during this structure scavenging.Air inlet directly enters cylinder sleeve downside inlet hole by the certain pressure fresh air that has of inlet box.When piston up-down, when piston top is lower than the inlet hole of cylinder sleeve, there is the air of pressure just the waste gas in the cylinder sleeve all to be gone out outside the cylinder sleeve through relief opening.Reach the purpose of ventilation.Because the air of inlet box has certain pressure during ventilation, this air that pressure arranged can only enter the cylinder sleeve chamber such as piston top, and in the body chamber below the piston that can not bleed, otherwise prevent exploding can occur, in addition because the slippage scope of piston is subjected to the restriction of porting, moves past on the piston and can not make suction port be positioned at the piston below in the journey, otherwise can leak gas, therefore piston can only up and down slippage in less scope, and the stroke of piston is short, the inefficiency of diesel engine.
In order to prevent that above-mentioned situation from occuring, diesel engines at present can adopt following two kinds of structures to realize, a kind of is that this structure is exactly that the connection straight-bar that connects piston is done certain-length with cross-type two-stroke diesel diesel engine structure.Piston is not directly to be connected (because connecting rod is connected with bent axle, when moving, connecting rod will swing, and cannot seal) with connecting rod, but is connected with the slide block of up and down vertical motion, slide block in slideway about straight line motion.Connect like this straight-bar just along with slide block is made up and down straight line motion, just straight-bar external diameter cover upper sealing ring can connected, the overcoat of seal ring sealing is fixed on cylinder sleeve downside upper cylinder body bottom surface, isolatedly is communicated with machine chamber, bottom, the pressure air of inlet box has not gone with regard to not draining in the downside machine chamber.This structural cost is very high, and the user can only high-end user, and most of user still can not afford.
The second structure is that piston is elongated, when the supreme initial point of piston stroking upward, the piston lower end is lengthened to the cylinder sleeve suction port with upper/lower positions, that is to say, when piston stroking upward during to the top, the piston bottom seals the cylinder sleeve suction port, can not allow pressure air bleed in the machine chamber, and for sealing pressure air, must be with two roads with upper piston ring.Such harm is: the first, if the design long stroke diesel engine the time, piston is very long.The second, because itself there is piston ring the piston upper end, and in the lower end piston ring is arranged, resistance just increases during piston up-down, and oil consumption is just very high, and wearing and tearing increase.The actual use do not have Economy.
All there is certain defect in aforementioned several two stroke diesel engine, also can be further improved.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of reasonable in design for above-mentioned prior art present situation, need not change the two stroke diesel engine that piston length also can make piston stroke lengthen, and this diesel engine also has the advantage fuel-efficient, that cost is low.
The utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of two stroke diesel engine, comprise frame, cylinder sleeve, outlet pipe, be provided with the piston that can move up and down in the cylinder sleeve, piston links to each other with bent axle by connecting rod, bent axle is positioned at the machine chamber of frame lower, the periphery on piston top is provided with piston ring, have suction port on the bottom perisporium of cylinder sleeve, the cylinder cap at cylinder sleeve top is provided with relief opening, described outlet pipe is communicated with the cylinder sleeve inner chamber by relief opening, and described relief opening is provided with the outlet valve that can open and close relief opening; It is characterized in that: the outside of described cylinder sleeve is provided with the suction tude of the fresh air that has certain pressure in it, this suction tude is communicated with suction port on the cylinder sleeve by gas-entered passageway, and the intake valve port place with the suction tude conducting on the described gas-entered passageway is provided with the suction valve that can open and close intake valve port; Piston be displaced downwardly to piston ring near on the described suction port along before, described outlet valve is opened waste air; When piston continued to be displaced downwardly to suction port and communicates with the cylinder sleeve inner chamber on piston top, described INO was by the further punching press combustion gas of fresh air; Piston move to piston ring near on the described suction port along before, described outlet valve is closed first, then suction valve cuts out, and enters the pressurized air process.
Enter in the cylinder sleeve inner chamber on piston top for there is more fresh air in guarantor unit in the time, above-mentioned suction port has a plurality of, arranges that along the circle spacing described gas-entered passageway is in the form of a ring to coat described a plurality of suction port.Fresh air is got over multipotency and is guaranteed that the oil inflame in the piston cavity is more abundant.
Above-mentioned suction valve is by the intake cam mechanism controls, described intake cam mechanism comprises the intake cam by the camshaft driven rotary, intake cam is positioned at camshaft case, described suction valve holds by the first spring and keeps cutting out intake valve port trend, and the periphery of described intake cam then directly or indirectly contacts with the end face of the bar section of suction valve.This suction valve drives by mechanical structure and opens, and it has the simple advantage of control mode.
Certainly suction valve also can have solenoid valve to control, and the electrical signal of solenoid valve then has the angle of crankshaft rotating to provide, and then carries out whether open intake valve port by solenoid valve, when bent axle turns over this angle, and the solenoid valve outage, intake valve port is closed.
Suction valve also can be controlled by hydraulic structure, hydraulic structure comprises oil hydraulic cylinder, plunger in the oil hydraulic cylinder is connected with the top of the bar section of suction valve, be positioned at the external oil pump of cylinder body of the oil hydraulic cylinder of plunger top, the cylinder body that is positioned at the oil hydraulic cylinder of plunger below is provided with pressurized air, suction valve keeps cutting out intake valve port trend under compressed-air actuated effect, in hydraulic oil is pressed into the cylinder space of plunger upper part, with active force during greater than the bottom compressed air pressure, plunger drive suction valve moves down opens intake valve port, when hydraulic oil discharges, suction valve cuts out intake valve port under compressed-air actuated effect, the signal that hydraulic oil is pressed into is provided by the angle of swing of the cam of camshaft or bent axle.
Compressed-air actuated effect in this hydraulic structure is equivalent to the effect of spring, and compressed-air actuated pressure keeps substantially constant.
Being pressed into of hydraulic oil can be pumped into high pressure oil in the valve oil cylinder by the actuated by cams oil pump, valve subdued (backing down), and the opening time is provided by cam.
Being pressed into of hydraulic oil can also be that the oil pump of machine band oil pump or driven by motor pumps into high pressure oil in the fuel reserve tank, connects valve oil cylinder, opens solenoid valve by solenoid valve, valve is subdued, shut electromagnetic valve, valve returns, and the open and close time provides signal by the crankshaft rotating angle.
Be rotatably connected to the first guiding rocking arm that can swing up and down on the madial wall of above-mentioned camshaft case, the upper surface of the first guiding rocking arm is rotatably connected to can be around the first guide roller of self axis rotation, described the first guide roller directly contacts with the periphery of intake cam, and the lower surface of the first guiding rocking arm then directly contacts with the end face of the bar section of suction valve.
If directly intake cam is contacted with the bar section of suction valve, intake cam can produce a cross component force to the bar section of suction valve in rotation process, intake cam collides the sealing that can affect between suction valve and the intake valve port to the side direction of suction valve for a long time, and this structure intake cam contacts with the bar section of suction valve by the first guiding rocking arm and the first guide roller, the lateral force of intake cam then acts on and the first guiding rocking arm like this, can not produce lateral force to suction valve.
Above-mentioned outlet valve opens and closes relief opening by the exhaust cam mechanism controls, described exhaust cam mechanism comprises the exhaust cam by the camshaft driven rotary, and rocking arm and push rod, described exhaust cam is positioned at camshaft case, described outlet valve is held by the second spring and keeps closing relief opening trend, described push rod is located on the camshaft case and with described exhaust cam and directly or indirectly contacts, push rod can move up and down under the effect of exhaust cam, the middle part of described rocking arm is rotatably connected on the support that is positioned on the cylinder cap; the first end of rocking arm contacts with the end face of the bar section of outlet valve, and the second end of rocking arm then contacts with the end face of push rod.This is mechanical exhaust structure, and it has the simple advantage of control mode.Certainly outlet valve also can adopt hydraulic pressure or electromagnetic valve structure.Can be with reference to the control structure of suction valve.
Be rotatably connected to the second guiding rocking arm that can swing up and down on the madial wall of above-mentioned camshaft case, the lower surface of the second guiding rocking arm is rotatably connected to can be around the second guide roller of self axis rotation, and the upper surface of the second guiding rocking arm then directly contacts with the bottom surface of described push rod.
If directly exhaust cam is contacted with push rod, exhaust cam can produce a cross component force to push rod in rotation process, exhaust cam collides the skew that contacts that can affect between pin and the rocking arm to the side direction of push rod for a long time, thereby affect the unlatching of outlet valve, and this structure exhaust cam contacts with push rod by the second guiding rocking arm and the second guide roller, the lateral force of exhaust cam then acts on and the second guiding rocking arm like this, can not produce lateral force to push rod.
Under the state that moves at piston away from suction port, although suction valve cuts out, but the gas of remaining certain pressure can be by suction port discharged in the frame downside machine chamber in the gas-entered passageway, although the amount of each gas seldom, but can in the machine chamber, put aside a large amount of pressed gas in the course of time, thereby affect the diesel engine normal operation, so we are provided with the gas outlet that the inner residual pressure gas in machine chamber can be discharged at the machine chamber of above-mentioned frame lower sidewall.Gas outlet can be discharged gas remaining in the machine chamber, remains and only has an atmospheric pressure in the machine chamber.
Run out of with gas outlet for the oil gas in the anti-stop machine chamber, above-mentioned gas outlet outside also is coated with cooling unit.This cooling unit can with the oil gas cooling for reflux that overflows with gas in the machine chamber, reach the purpose of fuel-economizing.
Also comprise air inlet turbocharger and exhaust-gas turbocharger, transmission shaft in described air inlet turbocharger and the exhaust-gas turbocharger is same, wherein, air inlet turbocharger passes through air cooling device successively, connecting tube is communicated with an end of described suction tude, exhaust-gas turbocharger is communicated with outlet pipe so that the transmission shaft that drives in the exhaust-gas turbocharger through the waste gas that outlet pipe is discharged rotates, the rotation of this transmission shaft drives air inlet turbocharger work simultaneously, described suction tude is provided the fresh air of certain pressure, the other end of described suction tude is provided with blower, suction tude is provided the fresh air of initial certain pressure when starting.More than be a kind of mode that pressurized air is provided, certainly pressurized air also can adopt two kinds of waste gas supercharging and scavenging pumps, scavenging pump can be divided into machine band and electronic two kinds.
The power of this air inlet turbocharger drives exhaust-gas turbocharger work by waste gas and provides, and need not extra power and comes to provide power to the air inlet turbine pressurized machine, makes this diesel engine more fuel-efficient, energy-conservation.
The outer end of above-mentioned bent axle is provided with camshaft sprocket, and the outer end of described camshaft is provided with crankshaft sprocket, links together by Transmitted chains between described camshaft sprocket and the crankshaft sprocket.Diesel engine is exactly the mechanical energy that the diesel oil chemical energy is converted to crankshaft rotating, and the power of the camshaft rotation of control suction valve and exhaust valve opening directly has bent axle to provide in this structure, and need not extra power provides, and has more Economy.Camshaft also available gear transmission structure is connected with transmission of crankshaft.
Compared with prior art, the utility model has the advantage of: the suction port of cylinder sleeve sidewall is not to cover by piston, but provide by the suction valve that is arranged on the gas-entered passageway place, even like this in the piston moving process away from suction port, suction port does not have fresh air yet and drains in the machine chamber, bottom, just because of suction port does not need piston seal yet, therefore piston need not extra lengthening, also be movable to the position away from suction port, greatly lengthened the stroke of piston, can enter abundant fresh air in the piston cavity, guarantee that diesel oil can fully be burnt, promote the working efficiency of diesel engine, also have piston also to need not in the bottom of piston piston ring to be set in addition again and enter the machine chamber to play the air that prevents pressure, the resistance the when minimizing of piston ring can reduce piston up-down in the piston also just reduces oil consumption, and the minimizing of piston ring can also reduce the replacing user cost of piston ring, has more Economy.Therefore, our two stroke diesel engine of invention is both fuel-efficient, and cost is low again, is the direction of user selection from now on, also is the diesel engine development direction.
Description of drawings
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is the A place enlarged view of Fig. 1;
Fig. 3 is the B place enlarged view of Fig. 1;
Fig. 4 is the utility model embodiment's front schematic view;
Fig. 5 is the utility model embodiment's side view.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
Shown in Fig. 1～5, be a preferred embodiment of the present utility model.
A kind of two stroke diesel engine comprises frame 33, cylinder sleeve 1, cylinder cap 12, outlet pipe 2, bent axle 4, oil gun 28, fuel valve 29, high pressure oil pump 30 etc.Wherein, be provided with the piston 3 that can move up and down in the cylinder sleeve, piston 3 links to each other with bent axle 4 by connecting rod 31, bent axle 4 is positioned at the machine chamber 34 of frame lower, the periphery on piston 3 tops is provided with piston ring 32, and piston ring 32 has four roads in the present embodiment, and certainly piston ring 32 also can multiple tracks, upper track piston ring and descend spacing between the road piston ring greater than the height of following suction port 11 most simultaneously, the lubricated of piston ring 32 has oil gun 28 to provide.The cylinder cap 12 at cylinder sleeve top is provided with relief opening 13, and make the fuel valve 29 of fuel-oil atmozation, 29 of fuel valves pass through high pressure oil pump 30 fuel feeding, if the cam structure that the startup of high pressure oil pump 30 also is arranged on the camshaft is controlled, the oil nozzle of fuel valve 29 moves past at piston 3 that the inner chamber to cylinder sleeve carries out oil spout under the state of upper dead center, have suction port 11 on the bottom perisporium of cylinder sleeve 1, outlet pipe 2 is communicated with cylinder sleeve 1 inner chamber by relief opening 13, and relief opening 13 is provided with the outlet valve 5 that can open and close relief opening.Also being provided with the frame access cover 36 of conveniently installing and overhauling that can open on the frame 33, also being provided with the convenient cylinder sleeve access cover 37 of installing and overhauling piston that can open on the cylinder sleeve 1, more than is the conventional structure of two stroke diesel engine.
The outside of cylinder sleeve 1 is provided with the suction tude 6 of the fresh air that has certain pressure in it, this suction tude 6 is communicated with suction port 11 on the cylinder sleeve by gas-entered passageway 7, suction port 11 in the present embodiment has a plurality of, arranges that along the circle spacing gas-entered passageway 7 is in the form of a ring to coat a plurality of suction ports 11.
As shown in Figure 1, 2, on the gas-entered passageway 7 be provided with the suction valve 8 that can open and close intake valve port 71 with intake valve port 71 places suction tude 6 conductings; Suction valve 8 opens and closes intake valve port by the intake cam mechanism controls in the present embodiment, intake cam mechanism comprises the intake cam 10 by camshaft 9 driven rotary, intake cam 10 is positioned at camshaft case 14, suction valve 8 holds by the first spring 81 and keeps cutting out intake valve port 71 trend, the periphery of intake cam 10 then with the end face mediate contact of the bar section of suction valve 8.Be rotatably connected to the first guiding rocking arm 15 that can swing up and down on the madial wall of camshaft case 14, the upper surface of the first guiding rocking arm 15 is rotatably connected to can be around the first guide roller 16 of self axis rotation, the first guide roller 16 directly contacts with the periphery of intake cam 10, and the lower surface of the first guiding rocking arm 15 then directly contacts with the end face of the bar section of suction valve 8.
Under the state that moves at piston 3 away from suction port 11, although suction valve 8 cuts out, but the gas of the certain pressure of gas-entered passageway 7 interior remnants can be by suction port 11 discharged in the frame 33 downside machine chambeies 34, although the amount of each gas seldom, but can in the machine chamber, put aside a large amount of pressed gas in the course of time, thereby affect the diesel engine normal operation, therefore be provided with the gas outlet 35 that machine chamber 34 inner residual pressure gases can be discharged at the machine chamber of frame 33 bottoms 34 sidewalls.Gas outlet 35 can be discharged the gas of machine chamber 34 interior remnants, remains and only has an atmospheric pressure in the machine chamber.Gas outlet 35 outsides also are coated with cooling unit 351.This cooling unit 351 can with the oil gas cooling for reflux that overflows with gas in the machine chamber, reach the purpose of fuel-economizing.
Such as Fig. 1, shown in 3, outlet valve 5 opens and closes relief opening by the exhaust cam mechanism controls, exhaust cam mechanism comprises the exhaust cam 17 by camshaft 9 driven rotary, and rocking arm 18 and push rod 19, exhaust cam 17 is positioned at camshaft case 14, outlet valve 5 is held by the second spring 51 and keeps closing relief opening 13 trend, push rod 19 be located on the camshaft case 14 and with exhaust cam 17 mediate contacts, push rod 19 can move up and down under the effect of exhaust cam 17; middle part of rocking arm 18 is rotatably connected on the support 20 that is positioned on the cylinder cap 12; first end of rocking arm 18 contacts with the end face of the bar section of outlet valve 5, and the second end of rocking arm 18 then contacts with the end face of push rod 19.Be rotatably connected to the second guiding rocking arm 21 that can swing up and down on the madial wall of camshaft case 14, the lower surface of the second guiding rocking arm 21 is rotatably connected to the upper surface that can lead rocking arms 21 around the second guide roller 22, the second that self axis rotates and then directly contacts with the bottom surface of push rod 19.
As shown in Figure 5, the outer end of bent axle 4 is provided with crankshaft sprocket 41, and the outer end of camshaft 9 is provided with camshaft sprocket 91, links together by Transmitted chains 27 between crankshaft sprocket 41 and the camshaft sprocket 91.
Piston 3 be displaced downwardly to piston ring 32 near on the suction ports 11 along before, outlet valve 5 is opened waste air; When piston 3 continued to be displaced downwardly to suction port 11 and communicates with the cylinder sleeve inner chamber on piston 3 tops, suction valve 8 was opened and is allowed the further punching press combustion gas of fresh air; Piston 3 move to piston ring 32 near on the suction ports 11 along before, outlet valve 5 is closed first, then suction valve 8 cuts out, and enters the pressurized air process.
Also comprise air inlet turbocharger 23 and exhaust-gas turbocharger 24, transmission shaft in air inlet turbocharger 23 and the exhaust-gas turbocharger 24 is same, wherein, air inlet turbocharger 23 is successively by air cooling device 231, connecting tube 25 is communicated with an end of suction tude 6, exhaust-gas turbocharger 24 is communicated with outlet pipe 2 so that the transmission shaft that the waste gas of discharging through outlet pipe 2 drives in the exhaust-gas turbocharger 24 rotates, the rotation of this transmission shaft drives air inlet turbocharger 23 work simultaneously, suction tude 6 is provided the fresh air of certain pressure, the other end of suction tude 6 is provided with blower 26, suction tude 6 is provided the fresh air of initial certain pressure when starting.
Working principle and the process of this two stroke diesel engine are as follows:
The first stroke, piston 3 move to top dead center from lower dead center.
When piston is in lower dead center, outlet valve 5 and suction valve 8 are early opened, the pressurized air of certain pressure just enters in the cylinder sleeve 1 in the suction tude 6, and rushes at outlet valve 5 and allow the further punching press combustion gas of fresh air, also makes simultaneously in the cylinder sleeve inner chamber on piston 3 tops to be full of the fresh air that pressure is arranged; Move on the piston 3, piston 3 move piston ring 32 near on the suction ports 11 along before, outlet valve 5 is closed first, then suction valve 8 cuts out, at least to guarantee when suction valve 8 cuts out to descend the road piston ring to be positioned at the below on the lower edge of suction port 11 most, move on piston 3 continues, enter the pressurized air process.
The second stroke, piston 3 move to lower dead center from top dead center.
Piston 3 walks to slightly crosses atdc, high pressure oil pump 30 starts fuel feeding valve 29 is carried out fuel feeding, the oil nozzle of fuel valve 29 carries out oil spout to the inner chamber of cylinder sleeve 1, the high temperature that pressurized air produces, light at once the fuel oil of atomizing, the pressure that burning produces, pushing piston 3 descending actings, piston 3 be displaced downwardly to piston ring 32 near on the suction ports 11 along before, outlet valve 5 is opened waste air, when piston 3 continued to be displaced downwardly to suction port 11 and communicates with the cylinder sleeve inner chamber on piston 3 tops, suction valve 8 was again opened and is allowed the further impact extrusion pressure of fresh air go out waste gas.
Bent axle is whenever goed around, and piston has been walked two strokes and just finished a circulation.
The suction port 11 of cylinder sleeve 1 sidewall is not to cover by piston 3, but stop that by the suction valve 8 that is arranged on gas-entered passageway 7 places the fresh air of certain pressure enters the machine chamber, even like this in piston 3 moving process away from suction port 11, suction port 11 does not have the fresh air with certain pressure yet and drains in the machine chamber, just because of suction port 11 does not need piston 3 sealings, therefore piston 3 need not extra lengthening, also be movable to the position away from suction port, greatly lengthened the stroke of piston 3, can enter abundant fresh air in the piston cavity, guarantee that diesel oil can fully be burnt, promote the working efficiency of diesel engine, also have piston 3 also to need not in the bottom of piston 3 piston ring 32 to be set in addition again and enter the machine chamber to play the air that prevents pressure, resistance when the minimizing of piston ring 32 can reduce piston up-down in the piston, also just reduce oil consumption, and the minimizing of piston ring 32 can also reduce the replacing user cost of piston ring, have more Economy.Therefore, our two stroke diesel engine of invention is both fuel-efficient, and cost is low again, is the direction of user selection from now on, also is the diesel engine development direction.
Claims (10)
1. two stroke diesel engine, comprise frame (33), cylinder sleeve (1), outlet pipe (2), be provided with the piston (3) that can move up and down in the cylinder sleeve, piston (3) links to each other with bent axle (4) by connecting rod (31), described bent axle (4) is positioned at the machine chamber (34) of frame downside, the periphery on piston (3) top is provided with piston ring (32), have suction port (11) on the bottom perisporium of cylinder sleeve (1), the cylinder cap at cylinder sleeve top (12) is provided with relief opening (13), described outlet pipe (2) is communicated with cylinder sleeve (1) inner chamber by relief opening (13), and described relief opening (13) is provided with the outlet valve (5) that can open and close relief opening; It is characterized in that: the outside of described cylinder sleeve (1) is provided with the suction tude (6) of the fresh air that has certain pressure in it, this suction tude (6) is communicated with suction port (11) on the cylinder sleeve by gas-entered passageway (7), and described gas-entered passageway (7) is gone up and the intake valve port (71) of suction tude (6) conducting locates to be provided with the suction valve (8) that can open and close intake valve port (71); Before piston (3) was displaced downwardly to the upper edge of the close described suction port (11) of piston ring (32), described outlet valve (5) was opened waste air; When piston (3) continued to be displaced downwardly to suction port (11) and communicates with the cylinder sleeve inner chamber on piston (3) top, described suction valve (8) was opened and is allowed the further punching press combustion gas of fresh air of pressure; Before piston (3) moved to the upper edge of the close described suction port (11) of piston ring (32), described outlet valve (5) was closed first, and then suction valve (8) cuts out, and enters the pressurized air process.
2. two stroke diesel engine according to claim 1, it is characterized in that: described suction port (11) has a plurality of, arranges that along the circle spacing described gas-entered passageway (7) is in the form of a ring to coat described a plurality of suction port (11).
3. two stroke diesel engine according to claim 1, it is characterized in that: described suction valve (8) is by the intake cam mechanism controls, described intake cam mechanism comprises the intake cam (10) by camshaft (9) driven rotary, intake cam (10) is positioned at camshaft case (14), described suction valve (8) holds by the first spring (81) and keeps cutting out intake valve port (71) trend, and the periphery of described intake cam (10) then directly or indirectly contacts with the end face of the bar section of suction valve (8).
4. two stroke diesel engine according to claim 3, it is characterized in that: be rotatably connected to the first guiding rocking arm (15) that can swing up and down on the madial wall of described camshaft case (14), the upper surface of the first guiding rocking arm (15) is rotatably connected to can be around first guide roller (16) of self axis rotation, described the first guide roller (16) directly contacts with the periphery of intake cam (10), and the lower surface of the first guiding rocking arm (15) then directly contacts with the end face of the bar section of suction valve (8).
5. two stroke diesel engine according to claim 1, it is characterized in that: described suction valve also can have solenoid valve to control, the electrical signal of solenoid valve then has the angle of crankshaft rotating to provide, then carry out whether open intake valve port by solenoid valve, when bent axle turns over this angle, the solenoid valve outage, intake valve port is closed.
6. two stroke diesel engine according to claim 1, it is characterized in that: described suction valve (8) is controlled by hydraulic structure, hydraulic structure comprises oil hydraulic cylinder, plunger in the oil hydraulic cylinder is connected with the top of the bar section of suction valve (8), be positioned at the external oil pump of cylinder body of the oil hydraulic cylinder of plunger top, the cylinder body that is positioned at the oil hydraulic cylinder of plunger below is provided with pressurized air, suction valve (8) keeps cutting out intake valve port (71) trend under compressed-air actuated effect, in hydraulic oil is pressed into the cylinder space of plunger upper part, with active force during greater than the bottom compressed air pressure, plunger drive suction valve (8) moves down opens intake valve port (71), when hydraulic oil discharges, suction valve (8) cuts out intake valve port (71) under compressed-air actuated effect, the signal that hydraulic oil is pressed into is provided by the angle of swing of the cam of camshaft or bent axle.
7. two stroke diesel engine according to claim 1, it is characterized in that: described outlet valve (5) opens and closes relief opening by the exhaust cam mechanism controls, described exhaust cam mechanism comprises the exhaust cam (17) by camshaft (9) driven rotary, and rocking arm (18) and push rod (19), described exhaust cam (17) is positioned at camshaft case (14), described outlet valve (5) is held by the second spring (51) and keeps closing relief opening (13) trend, described push rod (19) be located in camshaft case (14) upper and with described exhaust cam (17) mediate contact, push rod (19) can move up and down under the effect of exhaust cam (17), the middle part of described rocking arm (18) is rotatably connected on the support (20) that is positioned on the cylinder cap (12); the first end of rocking arm (18) contacts with the end face of the bar section of outlet valve (5), and the second end of rocking arm (18) then contacts with the end face of push rod (19); Be rotatably connected to the second guiding rocking arm (21) that can swing up and down on the madial wall of camshaft case (14), the lower surface of the second guiding rocking arm (21) is rotatably connected to can be around second guide roller (22) of self axis rotation, and the upper surface of the second guiding rocking arm (21) then directly contacts with the bottom surface of described push rod (19).
8. two stroke diesel engine according to claim 1 is characterized in that: machine chamber (34) sidewall of described frame (33) bottom is provided with the gas outlet (35) that machine chamber (34) inner residual pressure gas can be discharged.
9. two stroke diesel engine according to claim 8, it is characterized in that: described gas outlet (35) outside also is coated with cooling unit (351).
10. the described two stroke diesel engine of arbitrary claim according to claim 1～9, it is characterized in that: also comprise air inlet turbocharger (23) and exhaust-gas turbocharger (24), transmission shaft in described air inlet turbocharger (23) and the exhaust-gas turbocharger (24) is same, wherein, described air inlet turbocharger (23) is successively by air cooling device (231), connecting tube (25) is communicated with an end of described suction tude (6), described exhaust-gas turbocharger (24) then is communicated with outlet pipe (2) so that the transmission shaft that drives in the exhaust-gas turbocharger (24) through the waste gas that outlet pipe (2) is discharged rotates, the rotation of this transmission shaft drives air inlet turbocharger (23) work simultaneously, described suction tude (6) is provided the fresh air of certain pressure, the other end of described suction tude (6) is provided with blower (26), suction tude (6) is provided the fresh air of initial certain pressure when starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203789769U CN202707223U (en) | 2012-08-01 | 2012-08-01 | Two-stroke diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203789769U CN202707223U (en) | 2012-08-01 | 2012-08-01 | Two-stroke diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707223U true CN202707223U (en) | 2013-01-30 |
Family
ID=47587532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203789769U Expired - Fee Related CN202707223U (en) | 2012-08-01 | 2012-08-01 | Two-stroke diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707223U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777248A (en) * | 2012-08-01 | 2012-11-14 | 陈卫文 | Two-stroke diesel engine |
| CN113513402A (en) * | 2021-04-28 | 2021-10-19 | 广西玉柴机器股份有限公司 | Novel two-stroke multi-cylinder diesel engine scavenging device |
-
2012
- 2012-08-01 CN CN2012203789769U patent/CN202707223U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777248A (en) * | 2012-08-01 | 2012-11-14 | 陈卫文 | Two-stroke diesel engine |
| CN113513402A (en) * | 2021-04-28 | 2021-10-19 | 广西玉柴机器股份有限公司 | Novel two-stroke multi-cylinder diesel engine scavenging device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107676176B (en) | A kind of slide valve air gate type opposed pistons gasoline engine | |
| CN104675507A (en) | Two-stroke engine with air leading type scavenging system | |
| CN102817659B (en) | Crankshaft cam distribution device | |
| CN104791076A (en) | Variable volume combustion chamber internal combustion engine with auxiliary piston | |
| CN207111192U (en) | A kind of cartridge type air inlet and outlet device and engine cylinder head system | |
| CN102575570B (en) | Two-stroke engine | |
| CN102777248B (en) | Two-stroke diesel engine | |
| CN105909382A (en) | Volume-variable combustion chamber internal combustion engine using auxiliary crankshaft to drive auxiliary piston | |
| CN102877932A (en) | Turbo supercharged engine | |
| CN202707223U (en) | Two-stroke diesel engine | |
| CN105888834A (en) | Internal combustion engine with pistons oppositely arranged | |
| US20020073954A1 (en) | Two-stroke engine | |
| CN210033555U (en) | Device capable of simultaneously changing timing and lift of engine valve | |
| CN103470327B (en) | Energy-saving engine and exhaust control method for same | |
| CN202900405U (en) | Turbocharged engine | |
| CN104847541A (en) | Oxygen-enriched combustion engine system | |
| CN204610018U (en) | There is the two stroke engine of scavenging in air pilot mode system | |
| CN204900010U (en) | Take rotation type to supply exhaust system's engine | |
| CN2911205Y (en) | Rotary piston I.C. engine | |
| CN112855341A (en) | Crankshaft-free two-stroke reciprocating engine | |
| CN201687542U (en) | Two-stroke engine rotary shaft valve system | |
| CN2511795Y (en) | Two stroke IC engine with scavenging cylinder | |
| CN213392388U (en) | Novel two-stroke engine | |
| CN202718753U (en) | Engine | |
| CN203702338U (en) | Dead-point-free reciprocating internal combustion engine with connecting rod piston type combination combustor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20170801 |