CN208686476U

CN208686476U - A kind of four-stroke gasoline engine exhaust gas displacement apparatus and engine

Info

Publication number: CN208686476U
Application number: CN201821421365.1U
Authority: CN
Inventors: 柳铭峻
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2019-04-02
Anticipated expiration: 2028-08-31

Abstract

The utility model 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

A kind of four-stroke gasoline engine exhaust gas displacement apparatus and engine

Technical field

The utility model relates to technical field of automobile engine more particularly to a kind of four-stroke gasoline engine exhaust gas to replace Device 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.

Utility model content

The utility model in view of the above shortcomings of the prior art, provides a kind of four-stroke gasoline convenient for residual gas is discharged Engine exhaust displacement apparatus.

The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of four-stroke gasoline engine exhaust gas displacement Device, including piston cylinder, the piston cylinder include cylinder body, piston, the cylinder body be equipped with inlet valve, exhaust valve and air inlet pipe and Exhaust pipe 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 utility model are: use pressurizing device, due to the blowing pressure be higher than exhaust when exhaust gas pressure, Residual gas can smoothly be squeezed out.Available bigger flammable mixer holds every time so in same piston cavity Receiving space first is that increasing driving capability avoids last burning waste gas from being mixed into；Second is that internal piston temperature can be reduced in advance, Be conducive to prolonged engine life.Certainly this programme implement when, due in the combustion chamber can residual air, combustible gas gaseous mixture Ratio can make 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 utility model can also do following improvement.

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 pistons including engine cylinder body and in cylinder body Cylinder further includes 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 utility model are: engine can be effectively improved by the abundant discharge of each burning waste gas Combustion chamber effective volume, and then improve whole driving capability.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model four-stroke gasoline engine exhaust gas displacement apparatus；

Fig. 2 is the petrol engine structure schematic diagram of the utility model；

Fig. 3 is a kind of embodiment structure schematic diagram that valve control apparatus is replaced in the utility model.

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 principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical It is novel, it is not intended to limit the scope of the utility model.

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 to cylinder body Four piston cylinders in 01 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.

The working principle of the utility model is as follows: it is acted specific to a piston cylinder, if its acting, exhaust, air inlet, pressure Contracting stroke 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 are 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 wanted It is better than and is mixed with exhaust gas；It is more suitable with the embodiment of the utility model in addition it can be made by the mixing ratio for improving fuel oil and air It answers.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims

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.