CN101676538A - Engine with multiple-level gas displacement - Google Patents
Engine with multiple-level gas displacement Download PDFInfo
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- CN101676538A CN101676538A CN200810211306A CN200810211306A CN101676538A CN 101676538 A CN101676538 A CN 101676538A CN 200810211306 A CN200810211306 A CN 200810211306A CN 200810211306 A CN200810211306 A CN 200810211306A CN 101676538 A CN101676538 A CN 101676538A
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Abstract
The invention discloses an engine with multiple-level changeable gas displacement, which comprises an oil supply system, a gas intake system and a gas exhaust system, wherein the oil supply system cansingly control each cylinder; the gas intake system can separately control each cylinder; the gas exhaust system can close the cylinders; the oil supply control of the oil supply system is finished by a car computer; the gas intake system which is separately controlled comprises multiple throttle valves which are respectively connected with each gas intake branch pipe; and the gas exhaust systemwhich can close the cylinders comprises an exhaust valve and an exhaust valve backstop. The invention is characterized in that one cylinder works all the time, other cylinders can be dynamically closed or opened sequentially according to the power demand, and at least one cylinder works. Because the invention has the advantages of fuel saving, simple structure and mature process, the invention issuitable for gasoline engines, diesel engines and gas engines with multiple cylinders, and can be widely applied to each level of automobiles, engineering machinery, agricultural machinery, and the like.
Description
Technical field
The present invention relates to a kind of multicylinder engine, especially a kind of being installed on the automobile, can according in the automobile operation process to the variation of power demand, the motor of multi-level dynamic change air displacement belongs to vehicular engine.
Technical background
At present engine for automobile mainly contains petrol engine and diesel engine, is arranged by certain form by a plurality of cylinders (more than three or three), is divided into three kinds on type in upright arrangement, V-type and flat opposed type according to arrangement mode traditionally.Its advantage is a technical maturity, reliable operation; Shortcoming is that all cylinders are worked simultaneously, and in order to satisfy the demand of engine speed, motor gives enough fuel must for each cylinder altogether, and not enough if fuel is given altogether, engine speed can descend at once.Because the discharge capacity of motor car engine manufactures and designs according to the automobile greatest requirements, the power utilization less than 50% of motor when cruising, especially the power utilization rate only is 25% when the level road cruise, so available engine power utilization rate is low, and the fuel oil serious waste.
In order to overcome above deficiency, patent CN1039384A proposes automobile with double engine, but fails to use in practice owing to inconvenience is installed always.Last century the fifties to be the automotive research of representative and manufacturer with U.S. Chrysler improve the motor of big discharge capacity, both be called as the variable displacement engine technique, briefly in the motor light hours half cylinder is closed exactly, reach the purpose of fuel-economizing.[technology of Chrysler be called many air displacemenies system (Multiple Displacement System, MDS); Except Chrysler, GM and Honda company also adopt similar techniques to change the fuel-economizing performance of large-duty engine, and GM claims this technology to be (Displacement on Demand), and the meaning is that air displacement just is provided when needing; Honda this system call cylinder-variable management (Variable CylinderManagement, VCM)].
At present Suo You De Let Meter closes half cylinder in the light hours, on the V8 engine of Chrysler and GM only with four cylinder work, on the V6 of Honda engine with three cylinders.
Concrete technology has two kinds: when Chrysler and GM company adopt oil-break, promote a root elevator bar with cam and drive rocking arm driving valve closure again, tappet adopts hydraulic way, oil inlet quantity by the solenoid controlled tappet, the hydraulic pressure that flows to tappet when wanting the closed portion cylinder is closed, the tappet retractable, the pressure of cam can not be delivered to valve, and valve remains closed condition;
The engine DOHC of Honda does not have tappet, and it is by control system Shake arm and camshaft that cylinder is closed, and allows camshaft no longer promote gas valve Shake arm and prevents that air-stopping valve opens.
The variable air displacement technology can be saved certain fuel oil, and shifter cylinder cuts out intake valve and exhaust valve exactly, and the positive/negative pressure alternate of air consumes a large amount of power in the cylinder.Now only be applied to the above big discharge capacity V-type engine of six cylinders, and change to four cylinders or six just to three cylinder workings from eight cylinders, vary within wide limits, complex structure, the cost height only adopts and high-grade sedan car or large vehicle.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of motor (air displacement changes progression and equates with the cylinder number) of multi-level dynamic change air displacement is provided.It can close or open one of them cylinder or a plurality of cylinder in order according to power demand, has only a cylinder operation the most after a little while, because simple in structure, technical maturity.Be adapted to gasoline, diesel oil, the gas engine of multi-cylinder, can be widely used in various class automobiles, engineering machinery, farm machinery etc.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of motor of multi-level change discharge capacity, but comprise that the separately controllable oil supply system of each cylinder, each cylinder separate the gas handling system of control and the vent systems of shifter cylinder.
Described oil supply system, all multiple spot EFI petrol engines or diesel oil electronic fuel injection engine, computer program is independently controlled the fuel feeding of each cylinder, and non-electronic injection diesel engine is installed a solenoid valve between high pressure oil pump and nozzle tip.
The described separately gas handling system of control comprises air-strainer, intake duct, and multi-joint solar term cut down, the air inlet bronchus, and air-strainer connection intake duct, intake duct connect multi-joint closure, multi-joint closure connects each air intake branch respectively.All closure word orders, all solar term cut down coaxial.
But the vent systems of described shifter cylinder comprises exhaust valve, exhaust branch pipe, silencing apparatus and exhaust valve non-return device, and the exhaust valve non-return device is fixed on the cylinder head, and with exhaust valve rod and exhaust valve spring housing in central authorities
Described exhaust valve non-return device comprises shell, exhaust valve spring housing, two (or a plurality of) lock pawl, lock pawl axle, electromagnetic coil, armature and two (or a plurality of) return springs.On the cylinder head that the exhaust valve controller is fixed on, exhaust valve passes from the centre, the exhaust valve spring housing with spring housing middle and be locked on the intake valve bar, the inlet-valve spring cover is done with moving up and down of intake valve and is synchronized with the movement, and connects the holding (out) coil power supply when needs are closed this cylinder, makes coil produce magnetic field, armature moves upward under the effect in magnetic field and acts on the lock pawl and inwardly moves, be lower than lock during pawl when intake valve moves downward to spring housing, the lock pawl stops the spring housing return, and valve can't be closed.
When closing a cylinder, oil supply system stops the fuel feeding to this cylinder, and the exhaust valve non-return device stops exhaust valve at certain position simultaneously, valve can't be closed, keep normally open, the original compression stroke of motor is changed into to exhale and is washed into, and expansion stroke is changed into suction stroke.Piston air in the cylinder when to-and-fro motion sucks by the intake valve of often opening or breathes out, and has eliminated compression stroke and expansion stroke to the resistance of air that motor produces, and reduces the vibrations of motor.
Description of drawings
Fig. 1 is the basic principle figure of four cylinder engine of the present invention
Wherein: the 1-air intake branch, 2-Air flow meter (or air pressure gauge), 3-four connects the formula solar term and cuts down, the 5-oil sprayer, the 6-suction tude, 7-two cylinder non-return device, 8-three cylinder non-return devices, the 9-cam, the 10-air-strainer, 11-four cylinder non-return devices, 12-camshaft drive wheel, 13-one cylinder intake valve, 14-one cylinder exhaust valve, 15-two cylinder intake valves, 16-two cylinder exhaust valve, 17-three cylinder intake valves, 18-three cylinder exhaust valves, 19-four cylinder intake valves, 20-four cylinder exhaust valves, the 21-outlet pipe, the 22-cylinder cap, the 23-silencing apparatus
Fig. 2 is the structure principle chart of exhaust valve non-return device of the present invention
Wherein: 4-valve spring, 9-cam, 14-exhaust valve, 25-non-return device shell, 26-lock pawl, 27-holding (out) coil, 28-armature ring, 29-return spring, 30-exhaust valve spring housing, 31-lock pawl axle, 22-cylinder cap.
Fig. 3 is the pattern schematic diagram that the present invention closed or opened cylinder
Fig. 4 is diesel engine exhaust valve of the present invention and piston bit architecture key plan
Wherein: 14-exhaust valve, 22-cylinder cap, 33-air outlet flue, 34-concave station, 35-firing chamber, 36-piston.
Fig. 5 is the structural drawing of another exhaust valve non-return device of the present invention
Wherein: 37-lock pawl, 38-exhaust valve spring housing, the perforation of 39-valve stem, 40-electromagnetic coil, 41-armature 42-return spring, 43-spring shaft, 44-coil brace, 45-base, 46-lock pawl axle, 47-mounting hole.
Fig. 6 is the structural drawing that the present invention is used for the annular air door non-return device of changeable air valve motor
Wherein: 48-horizontal type lock pawl, 49 lock pawl axles, 50-mounting hole, 51-ring type base
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments:
The present invention is directed to electronic oil injection petrol engine, diesel engine, oil supply system, as long as computer provides instruction and can stop the wherein fuel feeding of any one cylinder at any time, belong to prior art, no longer introduce.Whether non-electric controlling diesel engine can providing by each cylinder fuel oil of electromagnetic valve.
Referring to Fig. 1, Fig. 1 is the basic principle figure of the multipole displacement engine of four cylinders, and what mainly embody is the basic structure of inlet and exhaust system.Gas handling system comprises air-strainer (10), suction tude (6), tetrad closure (3) and air inlet bronchus (1), intake valve (13,15,17,19), and wherein air-strainer connection intake duct, intake duct connect multi-joint closure, multi-joint closure connects each air intake branch respectively.Vent systems comprises exhaust valve (14,16,18,20), exhaust branch pipe (22), outlet pipe and silencing apparatus (23) composition, on the exhaust valve of two cylinder, three cylinders and four cylinders, be separately installed with exhaust valve non-return device (7,8,11), wherein the exhaust valve non-return device be installed on the cylinder cap and with exhaust valve rod and exhaust valve spring housing in central authorities.
First cylinder belongs to a cylinder of working all the time in this legend, in the gas handling system of first cylinder Air flow meter (2) has been installed.All oil spouts of four oil sprayers (5) when all cylinders are all worked, intake valve non-return device (7,8,11) is in releasing state, and motor is tantamount to normal engine.When needing power, automobile reduces, can be by 2,3,4 orderly close-down cylinders, when promptly closing a cylinder, the oil sprayer of the 2nd cylinder (5) fuel cut-off, exhaust valve non-return device (7) energising is simultaneously started working, the exhaust valve of 2 cylinders (16) is deflated a non-return device to be stoped and can't close, and is in normally open, and 2 cylinders quit work; Can close 3 cylinders, 4 cylinders with this principle.Be short of power when needing to recover,, disconnect the power supply of valve non-return device during recovery by the order recovery cylinder operation of 4 cylinders, 3 cylinders and 2 cylinders, the valve proper functioning, oil sprayer begins fuel feeding simultaneously.
Referring to Fig. 2, Fig. 2 is the basic principle figure of exhaust valve non-return device, and the intake valve non-return device comprises shell (25), lock pawl (26) and lock pawl axle (31), holding (out) coil (27), armature ring (28), return spring (29) and exhaust valve spring housing (30).Wherein holding (out) coil (27) is fixed in the cylindrical case (25), and coil is powered by control system, forms electromagnetic field during energising; Armature ring (28) is enclosed in the shell (25), can be up and down under the effect of electromagnetic field and spring; Lock pawl axle (31) is fixed on the shell, and lock pawl (26) is enclosed within on the lock pawl axle, and can be around the swing of lock pawl axle under the effect of armature ring (28).When holding (out) coil was powered, coil produced magnetic field, moved on the armature hoop, and it is inside to promote lock pawl head, by the exhaust valve spring housing exhaust valve is stoped in the fixed position, keeps normally open; When holding (out) coil is stopped power supply, magnetic field diminishes, the armature ring moves downward under the effect of return spring, and it is outside to promote lock pawl head in the other direction, and non-return device quits work.
Referring to Fig. 3, Fig. 3 is the pattern schematic diagram that the present invention closed or opened cylinder, and the motor micro computer according to the model that is fixed in the computer, is made the instruction that subtracts cylinder or increase cylinder according to accelerator open degree and engine speed to motor.Solid line represents that motor need subtract cylinder working among the figure, promptly reduces air displacement, and dotted line represents that motor need increase power, i.e. the cylinder of open and close increases air displacement, changes 3 cylinder operation into as 4 cylinder operation of 4 → 3 expressions.
On the self-shifting automobile, the automatic speed changing of automobile also is the variation that increases and decreases gear according to the valve opening of motor and two parameters of engine speed, so the present invention implements with the principle that motor has precedence over gearbox.
Fig. 4 be the present invention is directed to diesel engine when top dead center between exhaust valve (14) and the piston (36) apart from features of smaller, the corresponding exhaust valve in piston upper end has a concave station (34), piston motion does not collide with exhaust valve when having guaranteed that exhaust valve often leaves.
Fig. 5 is the structural drawing of another exhaust valve non-return device of the present invention, comprises lock pawl (37), exhaust valve spring housing (38), valve stem perforation (39), electromagnetic coil (40), armature (41), return spring (42), spring shaft (43), coil brace (44), base (45), lock pawl axle (46).Wherein armature of the same side and lock pawl are fastened on the lock pawl axle, when solenoid current by the time two ends generate an electromagnetic field, armature drives motion in the lock pawl case, when cutting off electric current, return spring promotes armature and drives the lock pawl and outwards move lock pawl return.
Fig. 6 is the annular non-return device schematic diagram that the present invention is directed to the changeable air valve engine design, comprises base (51), horizontal type lock pawl (48), lock pawl axle (49) composition, and characteristics are that base (51) is annular, is convenient to install.
It should be noted that at last: above with the in-line four cylinder motor as embodiment, and with exhaust valve as breathing valve, only in order to explanation the present invention and unrestricted technological scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or replacement to the present invention with being equal to; And all do not break away from the technological scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1, a kind of motor of multi-level change air displacement (air displacement changes progression and equates with the cylinder number).Comprise that but the separately controllable oil supply system of each cylinder, each cylinder separate the gas handling system of control and the vent systems of shifter cylinder.It is characterized in that one of them cylinder works all the time, all the other each cylinders be according to can closing or open one of them cylinder or a plurality of cylinder dynamically, in order according to power demand, and minimum have only a cylinder operation.
2, the gas handling system of multipole air displacement motor according to claim 1, comprise air-strainer (10), suction tude (6), multi-joint closure (3) and air inlet bronchus (1), intake valve (13,15,17,19), wherein air-strainer connection intake duct, intake duct connect multi-joint closure, multi-joint closure connects each air intake branch respectively.It is characterized in that each cylinder by a closure independently, all closure word orders, and coaxial.
3,, comprise by exhaust valve (14,16,18,20), exhaust branch pipe (22), outlet pipe and silencing apparatus (23), exhaust valve non-return device according to claim 1, described multipole air displacement engine's exhaust system and vent systems.The exhaust valve that it is characterized in that all the other each cylinders except that a cylinder of working all the time is equipped with an exhaust valve non-return device, and the exhaust valve non-return device is fixed on the cylinder cap, and with exhaust valve and exhaust valve spring housing in central authorities.
4, exhaust valve non-return device according to claim 3 comprises shell (25), lock pawl (26) and lock pawl axle (31), holding (out) coil (27), armature ring (28), return spring (29) and exhaust valve spring housing (30).It is characterized in that: inlet-valve spring cover (30) is locked between the upper end and spring of exhaust valve rod, motion campaign with valve, holding (out) coil (27) is fixed in the cylindrical case (25), armature ring (28) is enclosed in the shell (25) and can slides up and down, lock pawl axle (31) is fixed on the shell, lock pawl (26) is enclosed within on the lock pawl axle, can swing around lock pawl axle under the effect of armature ring (28).
5, according to claim 1, described multipole air displacement motor, when it is characterized in that being applied to diesel engine, the concave station (34) that the engine piston upper end is corresponding with exhaust valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810211306A CN101676538A (en) | 2008-09-18 | 2008-09-18 | Engine with multiple-level gas displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810211306A CN101676538A (en) | 2008-09-18 | 2008-09-18 | Engine with multiple-level gas displacement |
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| CN101676538A true CN101676538A (en) | 2010-03-24 |
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| CN200810211306A Pending CN101676538A (en) | 2008-09-18 | 2008-09-18 | Engine with multiple-level gas displacement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603729A (en) * | 2013-12-08 | 2014-02-26 | 吉林大学 | Variable-displacement engine |
| CN105697157A (en) * | 2016-04-06 | 2016-06-22 | 饶章奎 | Single cylinder opening oil cut-off mechanism of internal combustion engine |
| CN106351280A (en) * | 2016-10-26 | 2017-01-25 | 太原理工大学 | Energy-saving method for hybrid power engineering machine based on feed-forward compensation |
| CN106812613A (en) * | 2015-11-27 | 2017-06-09 | 长城汽车股份有限公司 | The control method of dual fuel engine, system and vehicle |
| WO2020073144A1 (en) * | 2018-10-09 | 2020-04-16 | 彭永 | Device and method for controlling output power of cylinder in batches in internal combustion engine, and energy conservation method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5928038A (en) * | 1982-08-06 | 1984-02-14 | Yamaha Motor Co Ltd | Fuel injection type multicylinder engine |
| CN2045783U (en) * | 1988-05-16 | 1989-10-11 | 郭景坤 | Cylinder-changing device for engine |
| CN1152071A (en) * | 1995-12-08 | 1997-06-18 | 株式会社久保田 | Direct injection type combustion chamber of diesel engine |
| CN2733012Y (en) * | 2004-10-18 | 2005-10-12 | 谢玉庆 | Piston without knocking against air valve |
| CN1959088A (en) * | 2006-03-15 | 2007-05-09 | 秦强 | Multicylinder engine system with variable discharge capacity |
| CN101109301A (en) * | 2006-07-18 | 2008-01-23 | 何学新 | Multi-displacement multi-compression ratio engine and control method thereof |
| CN101128650A (en) * | 2005-02-23 | 2008-02-20 | 丰田自动车株式会社 | Valve gear of internal combustion engine |
| CN101255823A (en) * | 2007-02-27 | 2008-09-03 | 福特环球技术公司 | Internal combustion engine with gas exchange valve deactivation |
-
2008
- 2008-09-18 CN CN200810211306A patent/CN101676538A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5928038A (en) * | 1982-08-06 | 1984-02-14 | Yamaha Motor Co Ltd | Fuel injection type multicylinder engine |
| CN2045783U (en) * | 1988-05-16 | 1989-10-11 | 郭景坤 | Cylinder-changing device for engine |
| CN1152071A (en) * | 1995-12-08 | 1997-06-18 | 株式会社久保田 | Direct injection type combustion chamber of diesel engine |
| CN2733012Y (en) * | 2004-10-18 | 2005-10-12 | 谢玉庆 | Piston without knocking against air valve |
| CN101128650A (en) * | 2005-02-23 | 2008-02-20 | 丰田自动车株式会社 | Valve gear of internal combustion engine |
| CN1959088A (en) * | 2006-03-15 | 2007-05-09 | 秦强 | Multicylinder engine system with variable discharge capacity |
| CN101109301A (en) * | 2006-07-18 | 2008-01-23 | 何学新 | Multi-displacement multi-compression ratio engine and control method thereof |
| CN101255823A (en) * | 2007-02-27 | 2008-09-03 | 福特环球技术公司 | Internal combustion engine with gas exchange valve deactivation |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603729A (en) * | 2013-12-08 | 2014-02-26 | 吉林大学 | Variable-displacement engine |
| CN106812613A (en) * | 2015-11-27 | 2017-06-09 | 长城汽车股份有限公司 | The control method of dual fuel engine, system and vehicle |
| CN105697157A (en) * | 2016-04-06 | 2016-06-22 | 饶章奎 | Single cylinder opening oil cut-off mechanism of internal combustion engine |
| CN106351280A (en) * | 2016-10-26 | 2017-01-25 | 太原理工大学 | Energy-saving method for hybrid power engineering machine based on feed-forward compensation |
| WO2020073144A1 (en) * | 2018-10-09 | 2020-04-16 | 彭永 | Device and method for controlling output power of cylinder in batches in internal combustion engine, and energy conservation method |
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Application publication date: 20100324 |