CN105240070B - A kind of engine variable discharge capacity advance/retard mechanism and its function mode - Google Patents
A kind of engine variable discharge capacity advance/retard mechanism and its function mode Download PDFInfo
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- CN105240070B CN105240070B CN201510669749.XA CN201510669749A CN105240070B CN 105240070 B CN105240070 B CN 105240070B CN 201510669749 A CN201510669749 A CN 201510669749A CN 105240070 B CN105240070 B CN 105240070B
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The present invention relates to a kind of in-engine variable displacement advance/retard mechanism and its function modes, including bent axle, the inlet valve being equipped in cylinder and cylinder, exhaust valve, spark plug, atomizer, the bent axle is that hydraulic variable timing integrates bent axle, the bent axle, which is connected by several U-tubes with hydraulic connecting rod, forms a closed pipeline, the hydraulic connecting rod is divided into one-way hydraulic connecting rod and bidirectional hydraulic connecting rod, it is formed by connecting by bidirectional hydraulic connecting rod between the U-tube and U-tube of the middle section of bent axle, it is formed by connecting by one-way hydraulic connecting rod between the U-tube and U-tube of the both ends part of bent axle；Bearing is installed in each U-tube, the connecting rod being connect with the piston in cylinder by the bearing is connected；The side of the bent axle is connected with flywheel, and the other side is connected by sealing ring with fixed fluid reservoir and hydraulic pump.Beneficial effects of the present invention are：Utilize variable crankshaft timing system so that engine operating efficiency is more preferably efficient.
Description
Technical field
The invention belongs to technical field of engines more particularly to a kind of engine variable discharge capacity advance/retard mechanism and its running sides
Formula.
Background technology
Existing piston-mode motor, stroke are all changeless (i.e. discharge capacity are fixed), above and below connecting rod is in cylinder
When movement, its suction stroke and working stroke is equal, because engine is in working stroke latter stage, some pressure is simultaneously
It is not utilized, but prerelease falls the energy dissipation of this part；It is very serious to result in engine power loss so that combustion
Oily economy is very low.The exhaust stroke of available engine, since engine stroke is fixed, piston can not reach cylinder and most push up
Portion, therefore acting finishes every time, the exhaust gas being discharged it is total some stay in cylinder, cannot exclude clean, reduce in this way
The oxygen proportion of sucked gas, the effective ratio of oxygen when cylinder compresses have been lost；In intake stroke, since the prior art is each
The suction stroke of air-breathing acting is fixed, that is, no matter you need to not need will suck so more gas into cylinder
Body, therefore also reduce effective acting of engine；In terms of compression, also due to compression ratio is fixed, oil gas mixing ratio
It is fixed, the torque of engine can only be improved by increasing engine speed.And the present invention is by being connected with engine
Hydraulic pump drives hydraulic variable timing to integrate bent axle, to change the stroke of cylinder, to realize the variable of engine displacement.In this way
The torque of engine is not only improved from rotating speed, more can increase engine displacement while increasing engine speed, from
And the output torque of bigger is obtained, more powerful power is provided, and the increase of discharge capacity comes in fact just with cylinder excess pressure
The raising of existing torque, therefore it is greatly improved the efficiency utilization rate of engine.Fuel oil mechanical efficiency is improved, exhaust emissions is reduced.
Invention content
It is an object of the invention to overcome the shortcomings of the prior art, and provide a kind of in-engine variable displacement just
When device and its function mode so that fuel economy is greatly improved.
The purpose of the present invention is by following technical solution to complete.This positive fashionable dress of in-engine variable displacement
It sets, including inlet valve, exhaust valve, spark plug, the atomizer being equipped in bent axle, cylinder and cylinder, the bent axle are variable
Hydraulic pressure timing integrates bent axle, which is connected shape by several single u-shaped pipes, hydraulic connecting rod and a hollow shaft, central entity axis
At a closed pipeline, and hydraulic oil is marked in entire bent axle；The hydraulic connecting rod is divided into one-way hydraulic connecting rod and bidirectional hydraulic
Connecting rod is formed by connecting by bidirectional hydraulic connecting rod between the U-tube and U-tube of the middle section of the bent axle, is installed in each U-tube
There is bearing, the connecting rod being connect with the piston in cylinder by the bearing is connected；One end of bent axle is connected by central entity axis
It is connected to flywheel, is connected by one-way hydraulic connecting rod between the central entity axis and bent axle, the other end of bent axle is connected by one-way hydraulic
Bar and hollow axis connection are sealed between the hollow shaft and fixed pipe fitting hollow shaft by sealing ring, solid in the fixation pipe fitting hollow shaft
Surely there are fluid reservoir and hydraulic pump, which is connected with engine timing belt.
Preferably, the U-tube is inserted into hydraulic connecting rod, and the first sealing ring of hydraulic connecting rod is close to the outer of U-tube
Wall forms closed structure movable up and down, and the second sealing ring in U-tube is formed with the Oil Guide pipe outer wall in hydraulic connecting rod
Closed structure movable up and down, with regard to this formation double-buckle internally and externally formula closed structure；U-tube, which is equipped with, simultaneously ensures that bent axle is rotating
The first limit base of Shi Wending and leakproofness, hydraulic connecting rod are equipped with the second limit for ensureing that bent axle is stablized in rotation with leakproofness
Position seat.
Preferably, the U-tube both ends are respectively equipped with the first oil guiding hole, the intermediate interlayer of bidirectional hydraulic connecting rod is equipped with
Second oil guiding hole makes bidirectional hydraulic connecting rod be divided into upper an actor's rendering of an operatic tune and lower an actor's rendering of an operatic tune by the intermediate interlayer.
A kind of function mode using such as above-mentioned in-engine variable displacement advance/retard mechanism includes the following steps：
1), when engine start, hydraulic pump is driven to start to work, hydraulic pump makes hydraulic pump with the raising of engine speed
Pressure increase therewith, the hydraulic oil of fluid reservoir can flow in used in each cylinder connecting rod with the pressure of hydraulic pump and connect at this time
U-tube in；So that entire bent axle forms telescopic variable entirety, and when engine speed is more than 700 revs/min, hydraulic pressure
Pressure caused by pump can break the initial balance pressure for limiting bent axle so that the distance of each hydraulic connecting rod starts to extend, piston
The stroke of reciprocating motion increases；
2), steps are as follows for engine operation：When the first cylinder does work, exhaust valve and IC Intake Valve Closes, atomizer oil spout,
Plug ignition, gasoline combustion generate heat, and volume expansion starts to do work to which piston moves downward for promotion；When rotating speed increases
When, prexxure of the hydraulic pump increases, and hydraulic connecting rod distance elongation, stroke also increases piston during moving downward, until pressure
When dynamic balance, i.e. hydraulic pressure are equal to pressure needed for elongation hydraulic connecting rod with cylinder pressure summation, piston reaches lower dead center, completes
Working stroke；
At the same time, the exhaust valve of the second cylinder is opened, IC Intake Valve Closes；Under bent axle drive, piston starts to transport upwards
Dynamic, hydraulic connecting rod starts to shrink within the scope of pressure balance, Distance Shortened；Until piston arrival cylinder head, by exhaust gas inside cylinder
Discharge is clean, completes instroke；
At the same time the inlet valve of third cylinder is opened, exhaust valve closing；Piston moves downward, and it is empty to start sucking in cylinder
Gas, when the hydraulic pressure increases, the distance of hydraulic connecting rod extend, and piston stroke increases, hydraulic connecting rod elongated distance and hydraulic pressure pressure
It tries hard to keep when depositing balance as the lower dead center of piston motion, increases into the air in cylinder so that the discharge capacity of engine increases, and completes
Suction stroke；
At the same time the inlet valve of the 4th cylinder and exhaust valve closing, piston upwards, until inner cylinder pressure and liquid
When pressure pressure preserves balance, piston reaches top dead centre, and air is compressed, and completes compression travel；180 ° of bent axle completion at this time is done
Merits and demerits journey；4th cylinder commencement of fuel injection, igniting later, carry out working stroke, and stroke, the second cylinder is exhausted in the first cylinder
Suction stroke is carried out, third cylinder carries out compression travel, finally completes 360 ° of acting rotations；Third cylinder starts to spray followed by
Oil, igniting carry out working stroke, and stroke is exhausted in the 4th cylinder, and the first cylinder carries out suction stroke, and the second cylinder carries out
Compression travel；The second last cylinder commencement of fuel injection, igniting, carry out working stroke, and stroke, the 4th vapour is exhausted in third cylinder
Cylinder carries out suction stroke, and the first cylinder carries out compression travel；Complete the power cycle of entire four cylinder engine, i.e., 720 ° are done work,
Total of four cylinder is done work；
3), when engine stop, the pressure of hydraulic pump returns to the initial balance pressure of bent axle, i.e. U-tube and hydraulic connecting rod
Stroke center condition is preserved, i.e., when piston is at the highest notch, hydraulic connecting rod elongated distance is that hydraulic connecting rod extends longest distance
Half, with engine speed be 700 revs/min when be consistent.
Preferably, the initial balance pressure of bent axle is 0.1-0.3Mpa, cylinder working stroke is set at this time as minimum value,
That is discharge capacity is minimum, and maximum balance pressure is 0.7-1.4Mpa, i.e., sets cylinder working stroke at this time as maximum value, i.e., discharge capacity is most
Greatly.
Preferably, the multiple that the cylinder setting quantity is 4.
Preferably, being the minimum injection rate of the engine when setting engine start, in the case of idle running；Work as engine
When rotating speed improves, prexxure of the hydraulic pump increases therewith, and U-tube extends under hydraulic action to both sides with hydraulic connecting rod so that bent axle
Distance increases, and the stroke of piston increases, and discharge capacity increases；In expansion stroke, pressure is bigger, and hydraulic connecting rod elongation, working stroke increases
Greatly, effectively acting enhancing；In exhaust stroke, since atmospheric pressure is less than prexxure of the hydraulic pump, can be elongated to cylinder foot always will
Gas exhaust gas inside cylinder is completely exhausted out；In intake stroke, pressure is bigger, and hydraulic connecting rod elongation, the gas sucked in cylinder increases；It is pressing
Contracting stroke, pressure is bigger, and the mixed gas compression degree in cylinder is higher, and compression ratio increases.
Preferably, the scalable distance of the hydraulic connecting rod on the bent axle is 20-60 millimeters, the elongation of hydraulic connecting rod
Spacing of the distance between two first limit base back sides in the same hydraulic connecting rod；Hydraulic connecting rod extends longest distance
The spacing between two first limit base back sides when second limit base of hydraulic connecting rod is in contact with the first limit base of U-tube.
Beneficial effects of the present invention are：Using variable crankshaft timing system, it can effectively change the stroke of piston motion, obtain
To the power to match so that engine operating efficiency is more preferably efficient.
Description of the drawings
Fig. 1 is the principle of the present invention structural schematic diagram.
Fig. 2 is the crankshaft structure schematic diagram of the present invention.
Fig. 3 is the u-tube structure schematic diagram of the present invention.
Fig. 4 is the cross-sectional view of the bidirectional hydraulic connecting rod of the present invention.
Label in attached drawing is respectively：1, bent axle；2, cylinder；3, inlet valve；4, exhaust valve；5, spark plug；6, atomizer；
7, piston；8, connecting rod；9, flywheel；10, fluid reservoir；11, U-tube；12, hydraulic connecting rod；13, bearing；14, sealing ring；15, hollow
Axis；16, central entity axis；17, fixed pipe fitting hollow shaft；20, hydraulic pump；21, the first cylinder；22, the second cylinder；23, third
Cylinder；24, the 4th cylinder；111, the second sealing ring；112, the first limit base；113, the first oil guiding hole；121, one-way hydraulic connects
Bar；122, bidirectional hydraulic connecting rod；123, the first sealing ring；124, oil guide pipe；125, the second limit base；126, intermediate interlayer；
127, the second oil guiding hole；128, upper an actor's rendering of an operatic tune；129, lower an actor's rendering of an operatic tune.
Specific implementation mode
Detailed introduction is done to the present invention below in conjunction with attached drawing：As shown in attached drawing 1,2, the present invention includes bent axle 1, cylinder
2 and cylinder 2 in the inlet valve 3, exhaust valve 4, spark plug 5, the atomizer 6 that are equipped with, it is characterised in that：The bent axle 1 is can
Become hydraulic pressure timing and integrate bent axle, the bent axle 1 is by several single u-shaped pipes 11, hydraulic connecting rod 12 and a hollow shaft 15, central entity axis
16, which are connected, to form a closed pipeline, and is marked with hydraulic oil in entire bent axle 1；The hydraulic connecting rod 12 divides to be connected for one-way hydraulic
Bar 121 and bidirectional hydraulic connecting rod 122 pass through bidirectional hydraulic connecting rod between the U-tube 11 and U-tube 11 of the middle section of the bent axle 1
122 are formed by connecting, and bearing 13 is equipped in each U-tube 11, the company being connect with the piston 7 in cylinder 2 by the bearing 13
Bar 8 is connected；One end of bent axle 1 is connected with flywheel 9 by central entity axis 16, passes through between the central entity axis 16 and bent axle 1
One-way hydraulic connecting rod 121 connects, and the other end of bent axle 1 is connect by one-way hydraulic connecting rod 121 with hollow shaft 15, the hollow shaft 15
It is sealed by sealing ring 14 between fixed pipe fitting hollow shaft 17, fluid reservoir 10 and hydraulic pressure is fixed in the fixation pipe fitting hollow shaft 17
Pump 20, which is connected with engine timing belt.
U-tube 11 as described in attached drawing 2,3,4 is inserted into hydraulic connecting rod 12, and the first sealing ring 123 of hydraulic connecting rod 12 is tight
The outer wall of patch U-tube 11 forms closed structure movable up and down, and the second sealing ring 111 in U-tube 11 and hydraulic connecting rod
124 outer wall of oil guide pipe in 12 forms closed structure movable up and down, with regard to this formation double-buckle internally and externally formula closed structure；U simultaneously
Type pipe 11 is equipped with the first limit base 112 for ensureing that bent axle 1 is stablized in rotation with leakproofness, and hydraulic connecting rod 12, which is equipped with, to be ensured
Bent axle 1 stablizes in rotation and the second limit base 125 of leakproofness.
11 both ends of U-tube are respectively equipped with the first oil guiding hole 113, and the intermediate interlayer 126 of bidirectional hydraulic connecting rod 122 is set
There is the second oil guiding hole 127, so that bidirectional hydraulic connecting rod 122 is divided into upper an actor's rendering of an operatic tune 128 and lower an actor's rendering of an operatic tune 129 by the intermediate interlayer 126.
A kind of function mode of in-engine variable displacement advance/retard mechanism, includes the following steps：
1), when engine start, hydraulic pump 20 is driven to start to work, hydraulic pump 20 makes liquid with the raising of engine speed
The pressure of press pump 20 increases therewith, and the hydraulic oil of fluid reservoir 10 can flow in each cylinder 2 with the pressure of hydraulic pump 20 at this time
In the U-tube 11 that connecting rod 8 used connects；So that entire bent axle 1 forms telescopic variable entirety, when engine speed is more than
At 700 revs/min, pressure caused by hydraulic pump 20 can break the initial balance pressure for limiting bent axle 1 so that each hydraulic connecting rod
12 distance starts to extend, and the stroke that piston 7 moves back and forth increases, and to change the capacity of cylinder 2, finally changes automobile
Torque；
2), steps are as follows for engine operation：When the first cylinder 21 does work, exhaust valve 4 and inlet valve 3 are closed, atomizer 6
Oil spout, spark plug 5 are lighted a fire, and gasoline combustion generates heat, and volume expansion starts to do work to push piston 7 to move downward；When
When rotating speed increases, 20 pressure of hydraulic pump increases, hydraulic connecting rod 12 apart from elongation, piston 7 during moving downward stroke also with
Growth, until pressure balance, i.e., when hydraulic pressure is equal to pressure needed for elongation hydraulic connecting rod 12 with cylinder pressure summation, piston
7 reach lower dead center so that acting pressure is lowered, and be can get the power under environment under low pressure in cylinder, is improved engine efficiency, completes
Working stroke；
At the same time, the exhaust valve 4 of the second cylinder 22 is opened, and inlet valve 3 is closed；Under the drive of bent axle 1, piston 7 starts
It moves upwards, hydraulic connecting rod 12 starts to shrink within the scope of pressure balance, Distance Shortened；Until piston 7 reaches cylinder 2 top,
Exhaust gas inside cylinder discharge is clean, and 12 elongated distance of hydraulic connecting rod at this time is the half that hydraulic connecting rod 12 extends longest distance,
Complete instroke；
At the same time the inlet valve 3 of third cylinder 23 is opened, and exhaust valve 4 is closed；Piston 7 moves downward, and starts in cylinder 2
Suck air, when the hydraulic pressure increases, the distance of hydraulic connecting rod 12 extends, and 7 stroke of piston increases, the elongation of hydraulic connecting rod 12 away from
From the lower dead center moved for piston 7 when preserving balance with hydraulic pressure, increase into the air in cylinder 2 so that engine
Discharge capacity increases, and completes suction stroke；
At the same time the inlet valve 3 of the 4th cylinder 24 and exhaust valve 4 are closed, and piston 7 moves upwards, until 2 internal pressure of cylinder
Power and hydraulic pressure preserve when balancing, and piston 7 reaches top dead centre, and air is compressed, and compression ratio is dynamic in cylinder, with starting
The rotating speed of machine changes and changes, and when the engine rotational speed is increased, prexxure of the hydraulic pump increases, and hydraulic pressure is bigger, the pressure of air
Contracting is than bigger, completion compression travel；Bent axle 1 completes 180 ° of acting process at this time；4th cylinder, 24 commencement of fuel injection, point later
Fire carries out working stroke, and stroke is exhausted in the first cylinder 21, and the second cylinder 22 carries out suction stroke, and third vapour 23 carries out
Compression travel finally completes 360 ° of acting rotations；23 commencement of fuel injection of third cylinder, igniting followed by, progress working stroke, and the
Stroke is exhausted in four cylinders 24, and the first cylinder 21 carries out suction stroke, and the second cylinder 22 carries out compression travel；The second last vapour
22 commencement of fuel injection of cylinder, igniting carry out working stroke, and stroke is exhausted in third cylinder 23, and the 4th cylinder 24 carries out air-breathing row
Journey, the first cylinder 21 carry out compression travel；Complete the power cycle of entire four cylinder engine, i.e., 720 ° actings, total of four vapour
Cylinder is done work；
3), when engine stop, the pressure of hydraulic pump 20 returns to the initial balance pressure of bent axle 1, i.e. U-tube connects with hydraulic pressure
Bar 12 preserve stroke center condition, i.e., when piston 7 is at the highest notch, with engine speed be 700 revs/min when keep one
It causes.
The initial balance pressure of bent axle 1 is 0.1-0.3Mpa, sets cylinder working stroke at this time as minimum value, i.e., discharge capacity is most
It is small；Maximum balance pressure is 0.7-1.4Mpa, i.e., sets cylinder working stroke at this time as maximum value, i.e., discharge capacity is maximum.
The multiple that quantity is 4 is arranged in the cylinder 2, be in order to allow engine hydraulic variable displacement timing system stablize with
Balance, acting is uniform, can just follow the above mode of work-doing.
It is the minimum injection rate of the engine when setting engine start, in the case of idle running；When engine speed improves
When, 20 pressure of hydraulic pump increases therewith, and U-tube 11 and hydraulic connecting rod 12 extend under hydraulic action to both sides so that bent axle 1 away from
From growth, the stroke of piston 7 increases, and discharge capacity increases；In expansion stroke, pressure is bigger, and hydraulic connecting rod 12 extends, and working stroke increases
Greatly, effectively acting enhancing；It can be elongated to cylinder foot always since atmospheric pressure is less than 20 pressure of hydraulic pump in exhaust stroke
Gas exhaust gas inside cylinder is completely exhausted out；In intake stroke, pressure is bigger, and hydraulic connecting rod 12 extends, and the gas sucked in cylinder increases；
In compression stroke, pressure is bigger, and the mixed gas compression degree in cylinder is higher, and compression ratio increases.
The scalable distance of hydraulic connecting rod 12 on the bent axle 1 is 20-60 millimeters, the elongated distance of hydraulic connecting rod 12
For the spacing between two 112 back sides of the first limit base in the same hydraulic connecting rod 12；Hydraulic connecting rod 12 extend longest away from
Two the first limit bases when being in contact with the first limit base 112 of U-tube 11 from the second limit base 125 for hydraulic connecting rod 12
Spacing between 112 back sides.
The advantages of the present invention over the prior art are that：
1, using variable crankshaft timing system, the stroke of piston motion can effectively be changed, the power to be matched makes
It is more preferably efficient to obtain engine operating efficiency.It can be balanced as hydraulic system pressure and cylinder pressure are formed when 2, doing work, change and live
Stroke of succeeding is filled in, to change engine output torque, hydraulic system pressure increases when the engine speed is high, while bent axle
Distance increases, it is meant that piston stroke increases, and cylinder volume is caused to increase so that the effective mechanical efficiency of cylinder improves, and discharge capacity increases
Greatly；The exhaust gas after gas in-cylinder combustion can completely be arranged light when 3, being vented, since hydraulic system is formed by pressure, when exhaust valve is beaten
It is hydraulic connecting rod stroke negative pressure in bent axle to open, and piston can be shifted onto to cylinder top, cause the exhaust gas in cylinder to be excluded dry
Only, the difference with available engine is more shown.4, upon inhalation, can be changed crankshaft timing system can provide corresponding bent axle away from
From so that due to the pressure of hydraulic system difference under different rotating speeds so that the air sucked is also different so that air and vapour
When the mixed gas of oil generates different oil gas mixing ratios, especially engine and is in high rotating speed, the air sucked will be got over
It is more so that oil gas mixing ratio is more preferably efficient, preferably realizes fuel-economizing purpose.When 5, compressing, it is possible to provide the state of different compression ratios,
Rotating speed more high compression ratio is higher.6, energy consumption can be effectively reduced using this system from can learn above, improve fuel efficiency,
Power needed for automobile under different conditions is provided.It is assumed that existing fixed crankshaft length is 6 centimetres, and make hydraulic variable timing into
The structure of integrated bent axle, i.e. hydraulic connecting rod maximum elongation distance is 4 centimetres, and the elongated distance that piston motion to cylinder top is is
2 centimetres；So maximum variable stroke distances are 6+2=8 centimetres, have extended 2 centimetres at a distance from bent axle with comparing before, i.e., effectively
Acting range increases 33%, because the pressure that available engine cylinder is opened in exhaust valve when being vented will generally be higher than
0.3MPa, therefore the features of the present invention is exactly to be done work using residual compression, reduces the residual pressure of cylinder so that fuel-economy
Property be greatly improved, in the case that do not considering other be lost, using the present invention design, efficiency 25% can be improved.
Embodiment 1
Below by taking four cylinder engine as an example, 76 millimeters of cylinder diameter, minimum stroke is 60 millimeters, and range is 80 millimeters, can
Distance of stretch out and draw back is 40 millimeters, i.e., minimum injection rate is 1.1 liters, and maximum pump discharge is 1.5 liters.Rotating speed is 700 when setting engine start
Rev/min when initial hydraulic pump pressure be 0.1MPa, hydraulic variable timing integrate bent axle hydraulic connecting rod elongated distance be
20 millimeters, working stroke is 60 millimeters, and minimum injection rate is 1.1 liters at this time；When engine speed is up to 8000 revs/min
When maximum pressure be 0.9MPa, hydraulic variable timing integrate bent axle hydraulic connecting rod elongated distance be 40 millimeters, working stroke
It it is 80 millimeters, maximum pump discharge is 1.5 liters at this time.When the engine starts, hydraulic pump is driven to start to work, in the idling state,
Hydraulic variable timing is integrated the hydraulic oil supercharging in bent axle and reaches 0.1MPa, the hydraulic variable corresponding to each cylinder by hydraulic pump
The hydraulic connecting rod elongation that timing integrates bent axle reaches corresponding equilibrium state, i.e. the elongated distance of expansion stroke is 20 millimeters,
Working stroke is 60 millimeters；The elongated distance of exhaust stroke is 20 millimeters of arrival cylinder heads；The elongation of intake stroke is 20 millis
Rice；The elongation of compression stroke is 14 millimeters of (compression ratios 10：1).With the raising of engine speed, the hydraulic pump driven is defeated
Go out pressure also to increase, when engine speed reaches 2000 revs/min, hydraulic variable timing is integrated bent axle by its hydraulic pump
The 0.3MPa that interior hydraulic oil is pressurized to, the hydraulic connecting rod elongation that the hydraulic variable timing corresponding to each cylinder integrates bent axle reach
To corresponding equilibrium state, i.e. the elongated distance of expansion stroke is 25 millimeters, and working stroke is 65 millimeters；Exhaust stroke is stretched
It is over long distances 20 millimeters of arrival cylinder heads；The elongation of intake stroke is 25 millimeters；The elongation of compression stroke is 13 millimeters of (compressions
Than being 9.4：1).When engine speed reaches 8000 revs/min, hydraulic variable timing is integrated the liquid in bent axle by hydraulic pump
The maximum pressure that pressure oil is pressurized to is 0.9MPa, and the hydraulic connecting rod that the hydraulic variable timing corresponding to each cylinder integrates bent axle is stretched
Long to reach corresponding equilibrium state, i.e. the elongated distance of expansion stroke is 40 millimeters, and working stroke is 80 millimeters；Exhaust stroke
Elongated distance be 20 millimeters arrival cylinder heads；The elongation of intake stroke is 40 millimeters；The elongation of compression stroke is 11 millimeters
(compression ratio 8.8：1).When engine is when rotating speed changes, institute's drive hydraulic pump makes trickling in hydraulic variable timing medley
To drive the flexible of hydraulic stem, the elongation of above each hydraulic connecting rod all becomes constantly for the change of hydraulic fluid pressure in axis
Change, is finally reached the purpose for changing discharge capacity.We can also can also be reached by changing hydraulic pump power induced way simultaneously
Above-mentioned same effect.
It is understood that it will be understood by those skilled in the art that being subject to technical scheme of the present invention and inventive concept
The protection domain of appended claims of the invention should all be belonged to replacement or change.
Claims (3)
1. the inlet valve being equipped in a kind of engine variable discharge capacity advance/retard mechanism, including bent axle (1), cylinder (2) and cylinder (2)
(3), exhaust valve (4), spark plug (5) and atomizer (6), it is characterised in that：The bent axle (1) is integrated for hydraulic variable timing
Bent axle, the bent axle (1) is by several single u-shaped pipes (11), hydraulic connecting rod (12) and a hollow shaft (15), central entity axis (16) phase
Connection forms a closed pipeline, and is marked with hydraulic oil in entire bent axle (1)；The hydraulic connecting rod (12) is divided into one-way hydraulic company
Bar (121) and bidirectional hydraulic connecting rod (122), by double between the U-tube (11) and U-tube (11) of the middle section of the bent axle (1)
It is formed by connecting to hydraulic connecting rod (122), bearing (13) is installed on each U-tube (11), pass through the bearing (13) and cylinder (2)
The connecting rod (8) that interior piston (7) is connected is connected；One end of bent axle (1) is connected with flywheel by central entity axis (16)
(9), which is connect between bent axle (1) by one-way hydraulic connecting rod (121), and the other end of bent axle (1) passes through
One-way hydraulic connecting rod (121) is connect with hollow shaft (15), passes through sealing between the hollow shaft (15) and fixed pipe fitting hollow shaft (17)
Enclose (14) sealing, be fixed with fluid reservoir (10) and hydraulic pump (20) in the fixation pipe fitting hollow shaft (17), the hydraulic pump (20) and
Engine timing belt is connected.
2. engine variable discharge capacity advance/retard mechanism according to claim 1, it is characterised in that：The U-tube (11) is inserted
Enter hydraulic connecting rod (12), and the outer wall formation that the first sealing ring (123) of hydraulic connecting rod (12) is close to U-tube (11) can live up and down
Dynamic closed structure, and the second sealing ring (111) in U-tube (11) and oil guide pipe (124) outer wall in hydraulic connecting rod (12)
Closed structure movable up and down is formed, with regard to this formation double-buckle internally and externally formula closed structure；U-tube (11), which is equipped with, simultaneously ensures song
Axis (1) stablizes in rotation and the first limit base (112) of leakproofness, and hydraulic connecting rod (12), which is equipped with, ensures that bent axle (1) is turning
Stablize the second limit base (125) with leakproofness when dynamic.
3. engine variable discharge capacity advance/retard mechanism according to claim 2, it is characterised in that：The U-tube (11) two
End is respectively equipped with the first oil guiding hole (113), and the intermediate interlayer (126) of bidirectional hydraulic connecting rod (122) is equipped with the second oil guiding hole
(127), bidirectional hydraulic connecting rod (122) is made to be divided into upper an actor's rendering of an operatic tune (128) and lower an actor's rendering of an operatic tune (129) by the intermediate interlayer (126).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510669749.XA CN105240070B (en) | 2015-10-13 | 2015-10-13 | A kind of engine variable discharge capacity advance/retard mechanism and its function mode |
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|---|---|---|---|
| CN201510669749.XA CN105240070B (en) | 2015-10-13 | 2015-10-13 | A kind of engine variable discharge capacity advance/retard mechanism and its function mode |
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| CN105240070B true CN105240070B (en) | 2018-07-24 |
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| CN109404130B (en) * | 2018-12-12 | 2021-07-16 | 中国北方发动机研究所(天津) | Stroke-variable hydraulic device |
| CN113694277B (en) * | 2021-08-18 | 2024-05-24 | 国药集团上海血液制品有限公司 | Multistage pressure regulating formula hemofiltration device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205652A1 (en) * | 2000-11-14 | 2002-05-15 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Variable compression ratio mechanism with two hydraulically operated valves in the crank shaft |
| CN101936229A (en) * | 2010-07-23 | 2011-01-05 | 高伟 | Variable volume compression ratio engine |
| CN102877960A (en) * | 2012-10-17 | 2013-01-16 | 赵立军 | Engine with variable compression ratio |
-
2015
- 2015-10-13 CN CN201510669749.XA patent/CN105240070B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205652A1 (en) * | 2000-11-14 | 2002-05-15 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Variable compression ratio mechanism with two hydraulically operated valves in the crank shaft |
| CN101936229A (en) * | 2010-07-23 | 2011-01-05 | 高伟 | Variable volume compression ratio engine |
| CN102877960A (en) * | 2012-10-17 | 2013-01-16 | 赵立军 | Engine with variable compression ratio |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105240070A (en) | 2016-01-13 |
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