CN102777248B - Two-stroke diesel engine - Google Patents
Two-stroke diesel engine Download PDFInfo
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- CN102777248B CN102777248B CN201210271635.6A CN201210271635A CN102777248B CN 102777248 B CN102777248 B CN 102777248B CN 201210271635 A CN201210271635 A CN 201210271635A CN 102777248 B CN102777248 B CN 102777248B
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Abstract
The invention relates to a two-stroke diesel engine. The two-stroke diesel engine comprises a cylinder sleeve, an exhaust pipe and a piston and is characterized in that a gas inlet pipe is arranged outside the cylinder sleeve, fresh air with certain pressure exists in the gas inlet pipe, the gas inlet pipe is communicated with a gas inlet on the cylinder sleeve through a gas inlet channel, and a gas inlet valve opening on the gas inlet channel is provided with a gas inlet valve which can open and close the gas inlet valve opening; an exhaust valve is opened and waste gas is exhausted before the piston moves down to a position at which a piston ring is close to the upper edge of the gas inlet; the gas inlet valve is opened, pressing of the fresh air is conducted and the waste gas is discharged further, when the piston continues to move down to the gas inlet and the piston is communicated with the inner cavity of the cylinder sleeve on the upper portion of the piston; and before the piston moves up and the piston ring is close to the upper edge of the gas inlet, the exhaust valve is closed firstly and the gas inlet valve is closed later. The gas inlet valve which is arranged at a position of the gas inlet channel is provided with the gas inlet opening. Even though the piston is far away from the gas inlet during the moving process, no fresh air leaks into a machine cavity on the lower portion through the gas inlet, the piston is not required to be lengthened and can moves a position which is far away from the gas inlet, and the stroke of the piston is increased greatly.
Description
Technical field
The present invention relates to a kind of diesel engine, relate 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, mainly contains two kinds of structures at present: one is loop scavenging, and another kind is uniflow scavenging at the two stroke diesel engine of use.
Loop-scavenged feature is apneustic device, simple in structure.A kind of diesel engine structure as disclosed in the patent No. Chinese invention patent " the exhaust valve type two stroke diesel engine of supercharging cross flow scavenging " that is ZL02140885.8 (publication number is CN1415846A).But because loop-scavenged structure is that porting has porting in cylinder sleeve cylinder barrel side, a side has been entered, a side exhaust.This structure can produce part waste gas in the above piston cavity of porting and sweep untotally, and fresh air deficiency, causes 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 is arranged on the cylinder head at cylinder sleeve top.When this structure scavenging, waste gas is swept very totally.Air inlet directly enters cylinder sleeve downside inlet hole by the certain pressure fresh air that has of inlet box.In the time of 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 cylinder sleeve all to be gone out outside cylinder sleeve through relief opening.Reach the object of ventilation.During due to ventilation, the air of inlet box has certain pressure, this air that has pressure can only enter the cylinder sleeve chamber as piston top, and in body chamber below the piston that can not bleed, otherwise can there is prevent exploding, be subject in addition the restriction of porting due to the slippage scope of piston, on piston, move past in journey and can not make suction port be positioned at piston below, otherwise can leak gas, therefore can only be in the less scope upper and lower slippage of piston, the stroke of piston is short, the inefficiency of diesel engine.
In order to prevent that above-mentioned situation from occurring, diesel engines at present can adopt following two kinds of structures to realize, and one is that this structure is exactly that the connection straight-bar that connects piston is done to certain length by cross-type two-stroke diesel diesel engine structure.Piston be not directly with is connected straight-bar and connects (because connecting rod is connected with bent axle, in the time moving, connecting rod will swing, and cannot seal), but be connected slide block straight line motion up and down in slideway with the slide block of upper and lower vertical motion.Connect like this straight-bar just along with slide block is made upper and lower straight line motion, just straight-bar external diameter cover upper sealing ring can connected, the sealing of the overcoat of seal ring is fixed on to cylinder sleeve downside upper cylinder body bottom surface, completely cuts off and be communicated with machine chamber, bottom, the pressure air of inlet box just can not drain in downside machine chamber and go.This structural cost is very high, and user can only high-end user, and most of user still can not afford.
The second structure is that piston is elongated, in the time of the supreme initial point of piston stroking upward, piston lower end is lengthened to cylinder sleeve suction port with upper/lower positions, that is to say, when piston stroking upward is during to top, piston bottom seals cylinder sleeve suction port, can not allow pressure air bleed in machine chamber, and for sealing pressure air, necessary Yong Er road is with upper piston ring.Such harm is: the first, if design long stroke diesel engine time, piston is very long.The second, because itself there is piston ring piston upper end, and there is piston ring in lower end, when piston up-down, resistance just increases, and oil consumption is just very high, and wearing and tearing increase.Actual use do not have Economy.
All there is certain defect in aforementioned several two stroke diesel engine, also can be further improved.
Summary of the invention
Technical problem to be solved by this invention 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 that this diesel engine also has advantages of is fuel-efficient, cost is low.
The present invention solves the problems of the technologies described above adopted technological scheme: a kind of two stroke diesel engine, comprise frame, cylinder sleeve, outlet pipe, in cylinder sleeve, be provided with the piston that can move up and down, piston is connected 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, on the bottom perisporium of cylinder sleeve, have suction port, the cylinder cap at cylinder sleeve top is provided with relief opening, described outlet pipe is communicated with 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 in it with the fresh air of certain pressure, this suction tude is communicated with the suction port on cylinder sleeve by gas-entered passageway, on described gas-entered passageway, is provided with the suction valve that can open and close intake valve port with the intake valve port place of suction tude conducting; Piston be displaced downwardly to piston ring near described suction port on along before, described outlet valve is opened waste air; In the time that piston continues to be displaced downwardly to suction port and communicates with the cylinder sleeve inner chamber on piston top, described INO is by the further punching press combustion gas of fresh air; On piston, move to piston ring near before edge on described suction port, described outlet valve is first closed, and then suction valve cuts out, and enters pressurized air process.
For there being more fresh air to enter in the cylinder sleeve inner chamber on piston top in guarantor unit's time, above-mentioned suction port has multiple, arranges along the circle spacing, and described gas-entered passageway is in the form of a ring to be coated described multiple suction port.Fresh air is got over multipotency and is ensured that the oil inflame in piston cavity is more abundant.
Above-mentioned suction valve is by intake cam mechanism controls, described intake cam mechanism comprises the intake cam by 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 directly or indirectly contacts with the end face of the bar portion of suction valve.This suction valve is driven and is opened by mechanical structure, 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 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 solenoid valve power-off, intake valve port is closed.
Suction valve also can be by hydraulic structure control, hydraulic structure comprises oil hydraulic cylinder, plunger in oil hydraulic cylinder is connected with the top of the bar portion 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, while being greater than bottom compressed air pressure with active force, plunger drives suction valve to move down and 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, by actuated by cams oil pump, pump into high pressure oil in valve oil cylinder, valve subdued to (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 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 crankshaft rotating angle.
On the madial wall of above-mentioned camshaft case, be rotatably connected to the first guiding rocking arm that can swing up and down, the upper surface of the first guiding rocking arm is rotatably connected to first guide roller that can rotate around self axis, described the first guide roller directly contacts with the periphery of intake cam, and the lower surface of the first guiding rocking arm directly contacts with the end face of the bar portion of suction valve.
If directly intake cam is contacted with the bar portion of suction valve, intake cam can produce a cross component force to the bar portion of suction valve in rotation process, intake cam collides the sealing that can affect between suction valve and intake valve port to the side direction of suction valve for a long time, and this structure intake cam contacts with the bar portion of suction valve by the first guiding rocking arm and the first guide roller, the lateral force of intake cam 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 exhaust cam mechanism controls, described exhaust cam mechanism comprises the exhaust cam by 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 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 being positioned on cylinder cap, the first end of rocking arm contacts with the end face of the bar portion of outlet valve, the second end of rocking arm 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.
On the madial wall of above-mentioned camshaft case, be rotatably connected to the second guiding rocking arm that can swing up and down, the lower surface of the second guiding rocking arm is rotatably connected to second guide roller that can rotate around self axis, and the upper surface of the second guiding rocking arm 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 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 acts on and the second guiding rocking arm like this, can not produce lateral force to push rod.
Under the state moving on piston away from suction port, although suction valve cuts out, but in gas-entered passageway, the gas of remaining certain pressure can be by suction port discharged in frame downside machine chamber, although the amount of each gas is little, but can in machine chamber, put aside in the course of time a large amount of pressed gas, normally work thereby affect diesel engine, therefore we are provided with the gas outlet that inner machine chamber residual pressure gas can be discharged on the sidewall of the machine chamber of above-mentioned frame lower.Gas outlet can be discharged gas remaining in machine chamber, remains and in machine chamber, only has an atmospheric pressure.
Run out of with gas outlet for the oil gas in anti-stop machine chamber, above-mentioned gas outlet outside is also coated with cooling unit.This cooling unit can, by the oil gas cooling for reflux overflowing with gas in machine chamber, reach the object of fuel-economizing.
Also comprise air inlet turbocharger and exhaust-gas turbocharger, transmission shaft in described air inlet turbocharger and exhaust-gas turbocharger is same, wherein, air inlet turbocharger passes through air cooling device successively, connecting tube is communicated with one end of described suction tude, exhaust-gas turbocharger is communicated with outlet pipe so that the waste gas of discharging through outlet pipe drives the transmission shaft rotation in exhaust-gas turbocharger, the rotation of this transmission shaft drives air inlet turbocharger work simultaneously, described suction tude is provided to 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 in the time starting.Be a kind of mode that pressurized air is provided above, certainly pressurized air also can adopt two kinds of waste gas supercharging and scavenging pumps, and scavenging pump can be divided into machine band and electronic two kinds.
The power of this air inlet turbocharger drives exhaust-gas turbocharger work to provide by waste gas, provides power without extra power to air inlet turbocharger, 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, between described camshaft sprocket and crankshaft sprocket, links together by Transmitted chains.Diesel engine is exactly diesel oil chemical energy to be converted to the mechanical energy of crankshaft rotating, and the power of controlling the camshaft rotation of suction valve and exhaust valve opening in this structure directly has bent axle to provide, and provides without extra power, has more Economy.Camshaft also can be connected with transmission of crankshaft with gear transmission structure.
Compared with prior art, the invention has the advantages that: the suction port of cylinder sleeve sidewall is not to cover by piston, but provide by the suction valve that is arranged on gas-entered passageway place, even like this in piston moving process away from suction port, suction port does not have fresh air yet and drains in machine chamber, bottom, just because of suction port does not need piston seal yet, therefore piston is without extra lengthening, also be movable to the position away from suction port, greatly lengthen the stroke of piston, in piston cavity, can enter abundant fresh air, guarantee that diesel oil can fully be burnt, promote the working efficiency of diesel engine, also have piston also without the bottom at piston, piston ring prevents pressure air to play to be set in addition again and enter machine chamber, the resistance when minimizing of piston ring can reduce piston up-down in piston, also just reduce oil consumption, and the minimizing of piston ring 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 that user selects from now on, is also diesel engine development direction.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention;
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 front schematic view of the embodiment of the present invention;
Fig. 5 is the side view of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in Fig. 1～5, it is a preferred embodiment of the present invention.
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, in cylinder sleeve, be provided with the piston 3 that can move up and down, piston 3 is connected 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, piston ring 32You tetra-roads in the present embodiment, and certainly piston ring 32 also can multiple tracks, spacing between simultaneously upper track piston ring He Xia road piston ring is greater than the height of following suction port 11, and 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 is also arranged on camshaft is controlled, the oil nozzle of fuel valve 29 moves past under the state of upper dead center the inner chamber of cylinder sleeve is carried out to oil spout on piston 3, on the bottom perisporium of cylinder sleeve 1, have suction port 11, 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.In frame 33, being also provided with the frame access cover 36 of conveniently installing and overhauling that can open, being also provided with the convenient cylinder sleeve access cover 37 of installing and overhauling piston that can open on cylinder sleeve 1, is more than 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 in it with certain pressure, this suction tude 6 is communicated with the suction port 11 on cylinder sleeve by gas-entered passageway 7, suction port 11 in the present embodiment has multiple, arranges along the circle spacing, and gas-entered passageway 7 is in the form of a ring to be coated multiple suction ports 11.
As shown in Figure 1, 2, on 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; In the present embodiment, suction valve 8 opens and closes intake valve port by intake cam mechanism controls, 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 with the end face mediate contact of the bar portion of suction valve 8.On the madial wall of camshaft case 14, be rotatably connected to the first guiding rocking arm 15 that can swing up and down, the upper surface of the first guiding rocking arm 15 is rotatably connected to first guide roller 16 that can rotate around self axis, 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 directly contacts with the end face of the bar portion of suction valve 8.
Owing to moving on piston 3 under the state 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 frame 33 downside machine chambeies 34, although the amount of each gas is little, but can in machine chamber, put aside in the course of time a large amount of pressed gas, normally work thereby affect diesel engine, therefore on 34 sidewalls of the machine chamber of frame 33 bottoms, be provided with the gas outlet 35 that inner machine chamber 34 residual pressure gas can be discharged.Gas outlet 35 can be discharged the gas of machine chamber 34 interior remnants, remains and in machine chamber, only has an atmospheric pressure.Gas outlet 35 outsides are also coated with cooling unit 351.This cooling unit 351 can, by the oil gas cooling for reflux overflowing with gas in machine chamber, reach the object of fuel-economizing.
As Fig. 1, shown in 3, outlet valve 5 opens and closes relief opening by 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 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, the middle part of rocking arm 18 is rotatably connected on the support 20 being positioned on cylinder cap 12, the first end of rocking arm 18 contacts with the end face of the bar portion of outlet valve 5, the second end of rocking arm 18 contacts with the end face of push rod 19.On the madial wall of camshaft case 14, be rotatably connected to the second guiding rocking arm 21 that can swing up and down, the upper surface that the lower surface of the second guiding rocking arm 21 is rotatably connected to second guide roller 22, the second guiding rocking arms 21 that can rotate around self axis 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, between crankshaft sprocket 41 and camshaft sprocket 91, links together by Transmitted chains 27.
Piston 3 be displaced downwardly to piston ring 32 near suction port 11 on along before, outlet valve 5 is opened waste air; In the time that piston 3 continues to be displaced downwardly to suction port 11 and communicates with the cylinder sleeve inner chamber on piston 3 tops, suction valve 8 is opened and is allowed the further punching press combustion gas of fresh air; On piston 3, move to piston ring 32 near before edge on suction port 11, outlet valve 5 is first closed, and then suction valve 8 cuts out, and enters pressurized air process.
Also comprise air inlet turbocharger 23 and exhaust-gas turbocharger 24, transmission shaft in air inlet turbocharger 23 and exhaust-gas turbocharger 24 is same, wherein, air inlet turbocharger 23 is successively by air cooling device 231, connecting tube 25 is communicated with one end of suction tude 6, exhaust-gas turbocharger 24 is communicated with outlet pipe 2 so that the waste gas of discharging through outlet pipe 2 drives the transmission shaft rotation in exhaust-gas turbocharger 24, the rotation of this transmission shaft drives air inlet turbocharger 23 to work simultaneously, suction tude 6 is provided to 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 in the time starting.
Working principle and the process of this two stroke diesel engine are as follows:
The first stroke, piston 3 moves to top dead center from lower dead center.
When piston is during in lower dead center, outlet valve 5 and suction valve 8 are early opened, in suction tude 6, the pressurized air of certain pressure just enters in cylinder sleeve 1, and rushes at outlet valve 5 and allow the further punching press combustion gas of fresh air, also makes to be filled with in the cylinder sleeve inner chamber on piston 3 tops the fresh air of pressure simultaneously; On piston 3, move, move piston ring 32 near before edge on suction port 11 on piston 3, outlet valve 5 is first closed, then suction valve 8 cuts out, when suction valve 8 cuts out, at least to guarantee that Xia road piston ring is positioned at the below on the lower edge of suction port 11, on piston 3 continues, move, enter pressurized air process.
The second stroke, piston 3 moves 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 to 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 atomization, the pressure that burning produces, promote that piston 3 is descending does work, piston 3 be displaced downwardly to piston ring 32 near suction port 11 on along before, outlet valve 5 is opened waste air, in the time that piston 3 continues to be displaced downwardly to suction port 11 and communicates with the cylinder sleeve inner chamber on piston 3 tops, suction valve 8 is again opened and is allowed the further impact extrusion of fresh air press combustion gas.
Bent axle is often goed around, and piston has been walked two strokes and just completed a circulation.
The suction port 11 of cylinder sleeve 1 sidewall is not to cover by piston 3, but stop that by being arranged on the suction valve 8 at gas-entered passageway 7 places the fresh air of certain pressure enters 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 machine chamber, just because of suction port 11 does not need piston 3 to seal, therefore piston 3 is without extra lengthening, also be movable to the position away from suction port, greatly lengthen the stroke of piston 3, in piston cavity, can enter abundant fresh air, guarantee that diesel oil can fully be burnt, promote the working efficiency of diesel engine, also have piston 3 also without the bottom at piston 3, piston ring 32 prevents pressure air to play to be set in addition again and enter machine chamber, the resistance when minimizing of piston ring 32 can reduce piston up-down in 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 that user selects from now on, is also diesel engine development direction.
Claims (6)
1. a two stroke diesel engine, comprise frame (33), cylinder sleeve (1), outlet pipe (2), in cylinder sleeve, be provided with the piston (3) that can move up and down, piston (3) is connected 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), on the bottom perisporium of cylinder sleeve (1), have suction port (11), the cylinder cap (12) at cylinder sleeve top is provided with relief opening (13), described outlet pipe (2) is communicated with cylinder sleeve (1) inner chamber by relief opening (13), 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) in it with the fresh air of certain pressure, this suction tude (6) is communicated with the suction port (11) on cylinder sleeve by gas-entered passageway (7), and described gas-entered passageway (7) intake valve port (71) upper and 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) is displaced downwardly to the upper edge of the close described suction port (11) of piston ring (32), described outlet valve (5) is opened waste air, in the time that piston (3) continues to be displaced downwardly to suction port (11) and communicates with the cylinder sleeve inner chamber on piston (3) top, described suction valve (8) is opened and is allowed the further punching press combustion gas of fresh air of pressure, on piston (3), move to piston ring (32) near before the upper edge of described suction port (11), described outlet valve (5) is first closed, and then suction valve (8) cuts out, and enters pressurized air process,
Described suction port (11) has multiple, arranges along the circle spacing, and described gas-entered passageway (7) is in the form of a ring to be coated described multiple suction port (11);
Described suction valve (8) is by 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) directly or indirectly contacts with the end face of the bar portion of suction valve (8); On the madial wall of described camshaft case (14), be rotatably connected to the first guiding rocking arm (15) that can swing up and down, the upper surface of the first guiding rocking arm (15) is rotatably connected to first guide roller (16) that can rotate around self axis, 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) directly contacts with the end face of the bar portion of suction valve (8);
Described outlet valve (5) opens and closes relief opening by 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) being positioned on cylinder cap (12), the first end of rocking arm (18) contacts with the end face of the bar portion of outlet valve (5), the second end of rocking arm (18) contacts with the end face of push rod (19), on the madial wall of described camshaft case (14), be rotatably connected to the second guiding rocking arm (21) that can swing up and down, the lower surface of the second guiding rocking arm (21) is rotatably connected to second guide roller (22) that can rotate around self axis, and the upper surface of the second guiding rocking arm (21) directly contacts with the bottom surface of described push rod (19).
2. 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 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, solenoid valve power-off, intake valve port is closed.
3. two stroke diesel engine according to claim 1, it is characterized in that: described suction valve (8) is by hydraulic structure control, hydraulic structure comprises oil hydraulic cylinder, plunger in oil hydraulic cylinder is connected with the top of the bar portion 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, while being greater than bottom compressed air pressure with active force, plunger drives suction valve (8) to move down and 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.
4. 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 inner to machine chamber (34) residual pressure gas can be discharged.
5. two stroke diesel engine according to claim 4, is characterized in that: described gas outlet (35) outside is also coated with cooling unit (351).
6. according to the two stroke diesel engine described in arbitrary claim in claim 1～5, 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 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 one end of described suction tude (6), described exhaust-gas turbocharger (24) is communicated with outlet pipe (2) so that the waste gas of discharging through outlet pipe (2) drives the transmission shaft rotation in exhaust-gas turbocharger (24), the rotation of this transmission shaft drives air inlet turbocharger (23) work simultaneously, described suction tude (6) is provided to 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 in the time starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210271635.6A CN102777248B (en) | 2012-08-01 | 2012-08-01 | Two-stroke diesel engine |
Applications Claiming Priority (1)
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| CN106968746A (en) * | 2015-10-05 | 2017-07-21 | 现代凯菲克株式会杜 | Control the apparatus and method of electronics continuous variable valve timing |
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| CN106523131B (en) * | 2016-11-10 | 2018-12-18 | 宁波市鄞州煜隆工具有限公司 | A kind of two-stroke internal combustion engine |
| CN113513424A (en) * | 2021-04-28 | 2021-10-19 | 广西玉柴机器股份有限公司 | Two-stroke diesel engine and air intake method thereof |
| 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 |
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| US6101989A (en) * | 1996-09-26 | 2000-08-15 | Clean Cam Technolog Systems | Low emission power plant and method of making same |
| JPH1193710A (en) * | 1997-09-24 | 1999-04-06 | Nissan Motor Co Ltd | Exhaust valve control device of 2-stroke diesel engine with supercharger |
| US5870982A (en) * | 1997-11-12 | 1999-02-16 | Strawz; Frank T. | Intake valve of a supercharged two stroke engine |
| JP3919598B2 (en) * | 2002-05-14 | 2007-05-30 | ダイハツ工業株式会社 | Two-cycle internal combustion engine |
| DE50300453D1 (en) * | 2002-07-09 | 2005-05-25 | Waertsilae Schweiz Ag Winterth | Method for operating a two-stroke reciprocating internal combustion engine |
| US20110056462A1 (en) * | 2009-09-04 | 2011-03-10 | Nagesh Mavinahally | Four cycle engine carburetors |
| CN202707223U (en) * | 2012-08-01 | 2013-01-30 | 陈卫文 | Two-stroke diesel engine |
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| CN106968746A (en) * | 2015-10-05 | 2017-07-21 | 现代凯菲克株式会杜 | Control the apparatus and method of electronics continuous variable valve timing |
| US10190449B2 (en) | 2015-10-05 | 2019-01-29 | Hyundai Kefico Corporation | Apparatus and method of controlling electronic continuously variable valve timing |
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