CN108869003A - A kind of four-stroke gasoline engine exhaust gas displacement apparatus and engine - Google Patents
A kind of four-stroke gasoline engine exhaust gas displacement apparatus and engine Download PDFInfo
- Publication number
- CN108869003A CN108869003A CN201811012556.7A CN201811012556A CN108869003A CN 108869003 A CN108869003 A CN 108869003A CN 201811012556 A CN201811012556 A CN 201811012556A CN 108869003 A CN108869003 A CN 108869003A
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- CN
- China
- Prior art keywords
- valve
- exhaust
- displacement
- cylinder body
- engine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
- F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The present invention relates to technical field of automobile engine, more particularly to a kind of four-stroke gasoline engine exhaust gas displacement apparatus, it includes piston cylinder, the cylinder body is equipped with inlet valve, exhaust valve and air inlet pipe and exhaust pipe, it further include the displacement valve and pressurizing device on the cylinder body, the pressurizing device includes displacement valve control apparatus, booster pump and pressure vessel, the pressurization pump intake is communicated with the atmosphere, it exports and is connect with the air inlet of the displacement valve, the outlet of the booster pump is equipped with the pressure vessel.The displacement valve control apparatus includes the driving device being synchronised with exhaust valve control cam.The invention also discloses a kind of petrol engines, and four piston cylinders including engine cylinder body and in cylinder body further include engine exhaust displacement apparatus as described above.The beneficial effect is that：By the abundant discharge of each burning waste gas, the combustion chamber effective volume of engine can be effectively improved, and then improves whole driving capability.
Description
Technical field
The present invention relates to technical field of automobile engine more particularly to a kind of four-stroke gasoline engine exhaust gas displacement apparatus
And engine.
Background technique
Four-stroke engine belongs to reciprocating piston internal combustion engine, according to the difference of fuel used type, is divided into gasoline engine, bavin
Oil machine and gaseous propellant engine three classes.Gasoline engine or diesel oil are referred to as using gasoline or diesel oil as the internal-combustion piston engine of fuel
Machine.By taking a piston cylinder of petrol engine as an example, there are four strokes for the course of work；Respectively expansion space stroke, instroke,
Suction stroke, compression travel；Its rotation angle for corresponding to engine crankshaft is respectively 1-180 degree, and 180 degree -360 is spent, 360-
540 degree, 540-720 degree, i.e. crankshaft, which often take two turns, completes an acting process；In four-stroke gasoline engine, pass through air inlet
It is combustion mixture, admission pressure 75-90Kpa that pipe, which enters piston cylinder,；Discharge is burning waste gas, pressure at expulsion 105-
125Kpa。
Modern carburetor type engine compression ratio is generally 6~9 (car some up to 9~11).Have 1 to nine/6ths
/ mono- exhaust gas cannot be discharged.In exhaust stroke, piston motion closes to an end to top dead centre exhaust stroke, and exhaust valve closes
It closes, that top combustion chamber can remain certain exhaust gas, if there is exhaust residual, keep next effective combustion mixture capacity real
Border is reduced, and causes expansion stroke power impaired.If these exhaust gas thoroughly can be discharged, it actually will increase every second compression and do
Work ability increases next air inlet capacity in other words.Combustion-supporting effect is had exhaust gas is replaced as air, than exhaust gas
It is good.
Summary of the invention
The present invention in view of the above shortcomings of the prior art, provide it is a kind of convenient for be discharged residual gas four-stroke gasoline start
Machine exhaust gas displacement apparatus.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of four-stroke gasoline engine exhaust gas displacement dress
It sets, including piston cylinder, the piston cylinder includes cylinder body, piston, the cylinder body equipped with inlet valve, exhaust valve and air inlet pipe and row
Tracheae is additionally provided with displacement valve on the cylinder body, further includes pressurizing device, and the pressurizing device includes displacement gas door control dress
Set, booster pump and pressure vessel, the pressurization pump intake are communicated with the atmosphere, outlet with it is described replace valve air inlet connect,
The outlet of the booster pump is equipped with the pressure vessel.The pressure size of the pressure vessel determines the start and stop of booster pump.
The beneficial effects of the invention are as follows：It, can be with due to exhaust gas pressure when the blowing pressure is higher than exhaust using pressurizing device
Residual gas is smoothly squeezed out.Available bigger flammable mixer accommodates sky every time so in same piston cavity
Between, first is that increasing driving capability, last burning waste gas is avoided to be mixed into；Second is that internal piston temperature can be reduced in advance, favorably
In prolonged engine life.Certainly this programme implement when, due in the combustion chamber can residual air, combustible gas gaseous mixture ratio
It can be made the appropriate adjustments according to the residual of the purging air, to guarantee optimal gas-air mixing ratio.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the displacement valve control apparatus is electrically connected with automotive engine control unit.
Beneficial effect using above-mentioned further scheme is, convenient for the control action of the electric control gear and engine is whole
Body control is mutually coordinated.
Further, the displacement valve control apparatus includes the driving dress being synchronised with the exhaust cam of the exhaust valve
It sets.
Beneficial effect using above-mentioned further scheme is that structure is simple, reliable.A set of and inlet valve or row can be increased
The similar cam of the driving mechanism of valve, tappet, push rod and lever system driving displacement valve, the only choosing of service time
It selects.
Further, the opening/closing time of the displacement valve is corresponding with the opening/closing time of exhaust valve in exhaust stroke.
Further, the opening/closing time of the displacement valve is less than the opening/closing time of exhaust valve in exhaust stroke.
Beneficial effect using above-mentioned further scheme is to can choose the proper period, sets residual gas
It changes cleaner.
The invention also discloses a kind of petrol engines, four piston cylinders including engine cylinder body and in cylinder body,
It further include engine exhaust displacement apparatus as described above.
Further, four piston cylinders supply compressed gas by a set of booster pump and pressure vessel, after the pressure vessel
It is respectively equipped with four air inlet branch roads for leading to four piston cylinder displacement valves.
The beneficial effects of the invention are as follows：By the abundant discharge of each burning waste gas, the burning of engine can be effectively improved
Room effective volume, and then improve whole driving capability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of four-stroke gasoline engine exhaust gas displacement apparatus of the present invention；
Fig. 2 is petrol engine structure schematic diagram of the invention；
Fig. 3 is a kind of embodiment structure schematic diagram that valve control apparatus is replaced in the present invention.
In Fig. 1 to Fig. 3：1, booster pump；2, check valve；3, pressure vessel；4, valve control apparatus is replaced；4-1, timing
Gear；4-2, tappet；4-3, push rod；4-4, connecting rod；5, valve is replaced；6, inlet valve；7, spark plug；8, exhaust valve；9, piston,
10, cylinder body；11, piston rod；01, motor body.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figure 1；A kind of four-stroke gasoline engine exhaust gas displacement apparatus, including piston cylinder, the piston cylinder include
Cylinder body 10, piston 9, the cylinder body 10 are equipped with inlet valve 6, exhaust valve 8 and air inlet pipe and exhaust pipe, are additionally provided on the cylinder body
Valve 5 is replaced, further includes pressurizing device, the pressurizing device includes displacement valve control apparatus 4, booster pump 1 and pressure vessel
3, be equipped with check valve 2,1 entrance of the booster pump in the booster pump outlet and be communicated with the atmosphere, outlet by the check valve 2 with
The air inlet connection of the displacement valve 5, the outlet of the booster pump 1 are equipped with the pressure vessel 3.
The pressure size of the pressure vessel 3 determines the start and stop of booster pump 1.When it is implemented, can pacify on pressure vessel
Pressure sensor is filled, makes container inner pressure control on pressure at expulsion 125Kpa, consider container capacity and squeezes exhaust gas effect
And lower one-stroke getter action, preferably 125Kpa-150Kpa.
The displacement valve control apparatus is electrically connected with automotive engine control unit.Can by solenoid-driven and with
Exhaust valve actuation time is adapted.
The displacement valve control apparatus 4 includes the driving device being synchronised with the exhaust cam of the exhaust valve.It is existing
Inlet valve, exhaust valve driven by the cam set that is installed on timing gears 4-1 axis, the driving device includes being set to timing gear
Displacement cam 4-5, tappet 4-2, push rod 4-3 and connecting rod 4-4, the connecting rod 4-4 on wheel shaft in the form of lever with displacement valve
Connection.Raised section on displacement cam 4-5 is adapted with the raised section of exhaust cam, also can adjust.As shown in Figure 3.
The opening/closing time of the displacement valve is corresponding with the opening/closing time of exhaust valve in exhaust stroke.
The opening/closing time of the displacement valve is less than the opening/closing time of exhaust valve in exhaust stroke.It can specifically be vented
The back segment short time squeezes into, for example is selected in 1/4 period second from the bottom of exhaust.
As shown in Fig. 2, the invention also discloses a kind of petrol engine, including engine cylinder body 01 and it is set in cylinder body 01
Four piston cylinders, further include engine exhaust displacement apparatus as described above.
Four piston cylinders supply compressed gas by a set of booster pump 1 and pressure vessel 3, distinguish after the pressure vessel 3
If there are four the air inlet branch roads for leading to four piston cylinder displacement valves 5.
Working principle of the present invention is as follows：It is acted specific to a piston cylinder, if its acting, exhaust, air inlet, compression punching
Journey corresponds respectively to crankshaft in 0-180 degree, 180-360 degree, 360-540 degree, 540-720 degree.I.e. exhaust stroke corresponds to 180-
360 degree, displacement valve is opened in the angle, and such as selection squeezes into compressed air in 270-315 degree.Since its air pressure is higher than exhaust gas
Pressure is sent exhaust gas outside cylinder body completely, mix when air mixture enters with remaining air, combustion efficiency is better than
It is mixed with exhaust gas；In addition it can make more to adapt to the solution of the present invention by the mixing ratio for improving fuel oil and air.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of four-stroke gasoline engine exhaust gas displacement apparatus, including piston cylinder, the piston cylinder includes cylinder body, piston, institute
Cylinder body is stated equipped with inlet valve, exhaust valve and air inlet pipe and exhaust pipe, which is characterized in that further include setting on the cylinder body
Ventilation door and pressurizing device, the pressurizing device include displacement valve control apparatus, booster pump and pressure vessel, the booster pump
Entrance is communicated with the atmosphere, and exports and connect with the air inlet of the displacement valve, the outlet of the booster pump holds equipped with the pressure
Device.
2. four-stroke gasoline engine exhaust gas displacement apparatus according to claim 1, which is characterized in that the displacement valve
Control device is electrically connected with automotive engine control unit.
3. four-stroke gasoline engine exhaust gas displacement apparatus according to claim 1, which is characterized in that the displacement valve
Control device includes the driving device being synchronised with the exhaust cam of the exhaust valve.
4. four-stroke gasoline engine exhaust gas displacement apparatus according to claim 1 or 2 or 3, which is characterized in that described to set
The opening/closing time of ventilation door is corresponding with the opening/closing time of exhaust valve in exhaust stroke.
5. four-stroke gasoline engine exhaust gas displacement apparatus according to claim 4, which is characterized in that the displacement valve
Opening/closing time be less than exhaust stroke in exhaust valve opening/closing time.
6. a kind of petrol engine, four piston cylinders including engine cylinder body and in cylinder body, which is characterized in that further include
Engine exhaust displacement apparatus as described in any one in claim 1-5.
7. four-stroke gasoline engine exhaust gas displacement apparatus according to claim 6, which is characterized in that four pistons
Cylinder supplies compressed gas by a set of booster pump and pressure vessel, is respectively equipped with four after the pressure vessel and leads to four piston cylinders and sets
The air inlet branch road of ventilation door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012556.7A CN108869003A (en) | 2018-08-31 | 2018-08-31 | A kind of four-stroke gasoline engine exhaust gas displacement apparatus and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012556.7A CN108869003A (en) | 2018-08-31 | 2018-08-31 | A kind of four-stroke gasoline engine exhaust gas displacement apparatus and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108869003A true CN108869003A (en) | 2018-11-23 |
Family
ID=64322618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811012556.7A Pending CN108869003A (en) | 2018-08-31 | 2018-08-31 | A kind of four-stroke gasoline engine exhaust gas displacement apparatus and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108869003A (en) |
-
2018
- 2018-08-31 CN CN201811012556.7A patent/CN108869003A/en active Pending
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