CN101255817B

CN101255817B - Environment protection type internal combustion engine

Info

Publication number: CN101255817B
Application number: CN200810045007XA
Authority: CN
Inventors: 陈永红
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-18
Filing date: 2008-03-18
Publication date: 2011-10-26
Anticipated expiration: 2028-03-18
Also published as: CN101255817A

Abstract

The present invention discloses an environmental protection type internal combustion engine which comprises a cylinder and a drive device in cylinder. The drive device in cylinder comprises: two occluded gears by tooth and alveolus mounted in cylinder, the front outer edge of the first gear and the back inner edge of alveolus of the second gear are connected to form two sliding airproof points, the outer edges beside two sides of the first gear, the inner edges beside two sides of alveolus of the second gear and two sliding airproof points form the first firebox, spark head is arranged on cylinder wall on the position of the first firebox, a sliding airproof structure is between tooth tops of two gears and inner wall of cylinder, axes of two gears are fixed in cylinder by bearing of driving gear outside cylinder. The present invention using burning power drives two gears rotating at the same time, improves power utilization. The exhaust gas let mount is small, fuel is burned for many times, the present invention saves source and is benefit for circumstance protection.

Description

A kind of environment protection type internal combustion engine

Technical field

The present invention relates to a kind of internal-combustion engine, relate in particular to a kind of two-way (mutually oppositely) utilize fuel combustion and the gas expansion power that produces, with the environment protection type internal combustion engine of gear as the power plant carrier.

Background technique

All the time, internal-combustion engine substantially all is a reciprocating-piston engine, the Wankel RC configuration that minority is also arranged in addition, the working principle of these traditional combustion engine all is lighting after inflammable gas and the combustion-supporting gas compression, produce a large amount of heats after the burn of high-pressure gas, under the effect of thermal expansion, this heat makes the pressure of the high pressure mixed gas in the firing chamber increase several times suddenly, this pressure promotes piston and moves down, and piston promotes connecting rod and moves down, and connecting rod promotes crankshaft rotating, in the impetus of the effect of inertia (as single-cylinder engine) of crankshaft-flywheel or other air cylinder connecting rod (as twin cylinder engine, four cylinder engine etc.) under, piston moves up, and the gas that compression and combustion is indoor is after piston moves into place, spark plug is lighted a fire once more, repeat above process, so repeatedly, drive the crankshaft-flywheel rotation.

The defective of above-mentioned traditional combustion engine is: in the process of the expansion acting power (being called for short work by combustion power) that utilizes fuel combustion to produce, all be the unidirectional work by combustion power that utilizes, the pressure that acts on cylinder inner wall then has been wasted, so the work by combustion power utilization is abundant inadequately; In addition, because the discharging of each waste gas after burning all compare fully, so imperfect combustion combustion gas does not burn away and just is discharged from the waste gas, formed waste of fuel, reduced efficient, the while discharge amount of exhaust gas is bigger, is unfavorable for environmental protection.

Summary of the invention

Purpose of the present invention provides a kind of environment protection type internal combustion engine with regard to being in order to address the above problem, this internal-combustion engine adopts, and two-way (mutually oppositely) utilizes the expansion power of fuel combustion to come the mode of driven gear flywheel rotation, and work by combustion power is utilized more fully.

The present invention is achieved through the following technical solutions above-mentioned purpose:

The present invention includes the power plant in cylinder and the cylinder, cylinder is provided with the fuel air mouth, air inlet, exhaust vent and spark plug, power plant in the described cylinder are: the power plant in the described cylinder are: two gears by tooth and the mutual interlock of teeth groove are installed in cylinder, when the mutual interlock of teeth groove of the tooth of first gear and second gear, in a pair of tooth and teeth groove of mutual interlock fullest, the outward edge of the tooth both sides of first gear contacts with the inward flange of the teeth groove both sides of second gear and forms two slidable sealing points respectively, the outward edge of the tooth both sides of first gear, the inward flange of the teeth groove both sides of second gear and two common first firing chambers that form of slidable sealing point are provided with spark plug on the cylinder end piece of position, first firing chamber; Be the slidable sealing structure between the tooth top of described two gears and the inwall of described cylinder, promptly under the prerequisite that the tooth of gear can slide easily, be positioned as close to the formation sealing state between the tooth top of gear and the inwall of cylinder; The axle of the driving gear that the axle of described two gears and cylinder are outer connects as one, and by its position in cylinder of bearing fixing of cylinder driving gear outward; Sense of rotation with the close described cylinder wall of described gear is a direction, on described cylinder wall, be provided with exhaust vent earlier, after be provided with fuel air mouth and air inlet, with two corresponding respectively cylinder walls of gear on be respectively arranged with separately independently exhaust vent.In actual applications, the same with existing dependency structure, in order to reach better slipper seal effect, on the inward flange of the outward edge of first gear and second gear, be separately installed with Stamping Steel Ribbon, on the inwall of cylinder, seal ring is installed.

As the preferred technical solution of the present invention, the shape of the inward flange of the outward edge of the tooth both sides of described first gear and the teeth groove both sides of second gear meets the following conditions: in a pair of tooth and teeth groove of described mutual interlock fullest, line with the central point of two gears is a baseline, central point with first gear is the center of circle, the tooth of first gear is in ± 20 ° of scopes the time, and described two slidable sealing points all are in the slidable sealing state; When the tooth of first gear during just at-30 °, first slidable sealing point just forms the slidable sealing state.Described air inlet is two, is arranged at corresponding with the connection part of described two gears respectively and is positioned on the top and terminal cylinder wall of gear sense of rotation.

In running of the present invention, at first driving two gears of the present invention by starting electrical machinery begins to rotate, enter following running afterwards: the valve and the plug ignition of each suction port are controlled automatically by central control unit, the valve open of fuel air mouth at first, in cylinder, spray into a certain amount of fuel, this fuel is by the top place of the cingulum of gear to the connection part of described two gears, when first slidable sealing point just forms, the valve open of the air inlet at this place, in cylinder, spray into a certain amount of pressurized air, after this pressurized air and the fuel mix that sprays into earlier the gas pressure at the connection part place of two gears is increased.After this in the extremely short time, second slidable sealing point forms, and first firing chamber forms, and most of mixed gas at this place is pressed into first firing chamber.Because not on the center line of two gears, so just the volume of first firing chamber that forms is bigger, rotation along with gear, when first firing chamber rotates on the center line that just is positioned at two gears, the volume of first firing chamber reaches and minimizes, at this moment the air pressure of the mixed gas in first firing chamber is the highest, under the effect of central control unit, the spark plug sparking, light the mixed gas in first firing chamber, the high temperature that mixed gas burning produces makes the several times that raise suddenly of the air pressure in first firing chamber.Because gear is among the continuous rotation, so when after the mixed gas in first firing chamber is lighted and passed through of short duration time-delay, producing blast, the center line of two gears has been left in first firing chamber, produce the blast back in the mixed gas burning and form first gas expansion chamber, the pressure that first gas expansion chamber produces is transferred on the tooth of two side gears, oppositely promote the gear rotation on both sides simultaneously, in this process, because work by combustion power is by two-way utilization, so work by combustion power is fully utilized, improved the utilization ratio of work by combustion power.After gear continues to rotate to an angle, first slidable sealing point and second slidable sealing point disconnect in succession, the depressurization state, and then, be positioned at the valve open of air inlet of tail end of the connection part of two gears, in cylinder, spray into a certain amount of pressurized air, at this moment, high temperature and flame in first gas expansion chamber still exist, improve at pressurized air under the situation of more oxygen (combustion-supporting), make and fail the further fully burning of fuel of perfect combustion in the burning for the first time, form second gas expansion chamber of High Temperature High Pressure, the pressure that second gas expansion chamber produces is transferred on the tooth of two side gears equally, oppositely promotes the gear rotation on both sides simultaneously.When gear rotates to the corresponding position of exhaust vent, a part of waste gas in this teeth groove is discharged into outside the cylinder, remaining waste gas (wherein still comprising the not clean-burning fuel of a part) is arrived and the corresponding position of fuel air mouth by the cingulum of gear, then begins identical next time cyclic process.In above-mentioned running, can produce very big heat in the cylinder, high temperature may cause damage to a certain degree to the parts in the cylinder, thereby influence friction factor and sealing effect etc., so cylinder of the present invention also can be as conventional engines, at its outer wall radiating fin is set, adopts mode air-cooled or water-cooled to lower the temperature.In addition, satisfy at needs under the situation of big driving power, a plurality of transmission shafts of the present invention can be coupled together, form multi-cylinder (as twin-tub, four cylinders etc.) motor, promote mutually between each motor, to reach the more powerful purpose of output.

Above-mentioned running has just been done detailed explanation to certain a pair of tooth in the gear and the working procedure of teeth groove, in fact each in the gear is all the same with said process to the working procedure of tooth and teeth groove, so, in a cycle period, what teeth gear has, and what and above-mentioned the same working procedure are just arranged.Illustrate at this, when the number of the tooth of two gears not simultaneously, be the cycle period of entire internal combustion engine with the cycle period of the few gear of the number of tooth.Because the existence of twice gas expansion chamber so in a cycle period, produced the inferior continuous Driving force of 2N (N is the number of the tooth of the few gear of the number of tooth) respectively on each gear, utilizes work by combustion power fully.

As best concrete structure of the present invention, described fuel air mouth is two groups, is separately positioned on two gears to distinguish on the corresponding cylinder walls.The stress balance that helps two gears like this.

The tooth of described first gear is six, and the tooth of described second gear is nine.Through overtesting, this structure can exist in satisfying certain hour under the prerequisite of two slidable sealing points simultaneously, effectively avoids the problem of colliding mutually between the tooth of two gears.Certainly, along with further practical development, the number of the tooth of described two gears also may more reasonably make up for other.

Described cylinder inner wall reduces the spatial volume in the described cylinder in the connection part indent of described two gears as far as possible.Can reduce reducing of gas pressure in the waste of fuel that causes greatly because of the space and the cylinder like this.

Described exhaust vent is a tilt port, and the angle of its inclination meets the following conditions: the direction of exhaust vent from an end of cylinder inner wall to an end of the cylinder outer wall sense of rotation with adjacent gear as far as possible is consistent.This structure is combustion gas more successfully.

Described fuel air mouth is a tilt port, and the angle of its inclination meets the following conditions: the direction of fuel air mouth from an end of cylinder inner wall to an end of the cylinder outer wall sense of rotation with adjacent gear as far as possible is opposite.This structure can more successfully spray into fuel, and the tooth that also helps gear is taken away fuel.

As a further improvement on the present invention, described fuel air mouth comprises gas, oily suction port and atomized water import.Rock gas and gasoline are general main fuels commonly used, also can be other main fuel such as ethanol etc.The benefit that adds atomized water is: when in the high temperature and high pressure environment that is in first gas expansion chamber and second gas expansion chamber, the part water molecule can resolve into hydrogen ion and oxonium ion, and hydrogen ion can produce heat with the oxonium ion burning, is a kind of auxiliary fuel, can save main fuel, reduce cost; Oxonium ion itself is a kind of combustion improver, helps the further fully burning of fuel, has improved the utilization ratio of fuel; Atomized water also cools off the flank of tooth of gear and cleans and lubricated in addition, has cooling, reduces to rub, protect the effect of cylinder.

Beneficial effect of the present invention is:

Because the present invention utilizes work by combustion power oppositely to promote two gear rotations simultaneously, so improved combustion powered utilization ratio effectively, has saved fuel, has reduced cost; Because fuel makes the fuel combustion more abundant through twice or burning more frequently, reduced the particularly discharge amount of harmful gas (as carbon monoxide etc.) of waste gas, help environmental protection.In the today of advocating energy-saving and emission-reduction, lack at home under the situation of independent intellectual property right of internal-combustion engine, the present invention is to the promotion of national environmental protection cause and to the foundation of domestic internal-combustion engine independent intellectual property right with safeguard that all there is the effect of highly significant the aspect.

Description of drawings

Fig. 1 is one of structural representation of the present invention;

Fig. 2 is two of a structural representation of the present invention;

Fig. 3 is three of a structural representation of the present invention;

Fig. 4 is four of a structural representation of the present invention;

Fig. 5 is five of a structural representation of the present invention.

Embodiment

Below in conjunction with accompanying drawing concrete structure of the present invention and running are further described:

As shown in Figure 1, first firing chamber just is positioned on the center line of two gears among the figure, the present invention includes the power plant in cylinder 1 and the cylinder 1, cylinder 1 is provided with gas, oily suction port 8, atomized water import 9,

air inlet

12 and 16, exhaust vent 3 and spark plug 11.As shown in Figure 1, concrete power plant in the cylinder 1 are: two gear 15 and gears 2 by tooth and the mutual interlock of teeth groove are installed in cylinder 1, when the mutual interlock of teeth groove of the tooth of first gear 15 and second gear 2, in a pair of tooth and teeth groove of mutual interlock fullest, the outward edge of the tooth both sides of first gear 15 contacts with the inward flange of the teeth groove both sides of second gear 2 and forms two slidable sealing points 5 respectively, the outward edge of the tooth both sides of first gear 15, the inward flange of the teeth groove both sides of second gear 2 and two slidable sealing point 5 common first firing chambers 6 that form are provided with spark plug 11 on the cylinder end piece of 6 positions, first firing chamber; Be the slidable sealing structure between the inwall of the tooth top of gear 15 and gear 2 and cylinder 1, promptly under the prerequisite that the tooth of gear 15 and gear 2 can slide easily, be positioned as close to the formation sealing state between the tooth top of gear 15 and gear 2 and the inwall of cylinder 1; The axle of the driving gear outside the axle 13 of gear 15 and the axle 10 of gear 2 and the cylinder 1 connects as one, and it is (not visible among the figure by its position in cylinder 1 of bearing fixing of the driving gear outside the cylinder 1, the main purpose of this structure is to avoid the inwall generation pressure of the tooth top of gear 15 and gear 2 to cylinder 1, forms frictional force).As shown in Figure 1, be direction with gear 15 near the sense of rotation of cylinder 1 inwalls, on the wall of cylinder 1, be provided with exhaust vent 3 earlier, after be provided with gas, oily suction port 8, atomized water import 9, air inlet 12; Is direction with gear 2 near the sense of rotation of cylinder 1 inwalls, is provided with exhaust vent 3 on the wall of cylinder 1 earlier, after be provided with gas, oily suction port 8, atomized water import 9, air inlet 12.As shown in Figure 1, in two

air inlets

12 and 16, air inlet 12 is arranged at corresponding with the connection part of two gears 15 and gear 2 and is positioned on the wall of cylinder 1 at top of gear sense of rotation; Air inlet 16 is arranged at corresponding with the connection part of gear 15 and gear 2 and is positioned on the wall of cylinder 1 of end of gear sense of rotation.In actual applications, the same with existing dependency structure, in order to reach better slipper seal effect, on the inward flange of the outward edge of first gear 15 and second gear 2, be separately installed with Stamping Steel Ribbon, on the inwall of cylinder 1, seal ring is installed.

As Fig. 1, Fig. 3 and shown in Figure 4, the shape of the inward flange of the outward edge of the tooth both sides of first gear 15 and the teeth groove both sides of second gear 2 meets the following conditions: in a pair of tooth and teeth groove of mutual interlock fullest, line (dot and dash line among the figure) with the central point of two gears is a baseline, central point (i.e. the center of axle 13) with first gear 15 is the center of circle, the tooth of first gear 15 is in ± 20 ° of scopes the time, and (illustrate: Fig. 3 is-20 ° state, Fig. 4 is+20 ° a state, Fig. 1 is 0 ° a state), two slidable sealing points 5 all are in the slidable sealing state.As shown in Figure 2, when the tooth of first gear 15 during just at-30 °, first slidable sealing point 5 just forms the slidable sealing state.

As shown in Figure 1, the tooth of first gear 15 is six, and the tooth of second gear 2 is nine.Through overtesting, this structure can exist in satisfying certain hour under the prerequisite of two slidable sealing points 5 simultaneously, effectively avoids the problem of colliding mutually between the tooth of gear 15 and gear 2.Certainly, along with further practical development, the number of the tooth of gear 15 and gear 2 also may more reasonably make up for other.

As shown in Figure 1, the inwall of cylinder 1 reduces the spatial volume in the cylinder 1 in the connection part indent of gear 15 and gear 2 as far as possible.Can reduce reducing of gas pressure in the waste of fuel that causes greatly because of the space and the cylinder 1 like this.

As shown in Figure 1, exhaust vent 3 is a tilt port, and the angle of its inclination meets the following conditions: the direction of exhaust vent 3 from an end of cylinder 1 inwall to an end of the cylinder 1 outer wall sense of rotation with adjacent gear 15 or gear 2 as far as possible is consistent.This structure is combustion gas more successfully.Gas, oily suction port 8, atomized water import 9 are tilt port, and the angle of its inclination meets the following conditions: gas, oily suction port 8, atomized water import 9 direction from an end of cylinder 1 inwall to an end of the cylinder 1 outer wall sense of rotation with adjacent gear 15 or gear 2 as far as possible is opposite.This structure can more successfully spray into fuel, and the tooth that also helps gear 15 and gear 2 is taken away fuel.

In running of the present invention, the valve and the plug ignition of each suction port are controlled automatically by central control unit, at first driving gear 15 of the present invention or gear 2 by starting electrical machinery begins to rotate, enter following running afterwards: with reference to Fig. 2, before state shown in Figure 2 (not visible among the figure), at first, gas, oil suction port 8, the valve open of atomized water import 9, in cylinder 1, spray into a certain amount of main fuel and (be generally rock gas or gasoline, also can be ethanol etc.) and auxilliary fuel (being atomized water), this fuel is by the cingulum of gear 15 and gear 2 during to the place, top of the connection part of gear 15 and gear 2.As shown in Figure 2, when first slidable sealing point 5 has just formed, the valve open of the air inlet 12 at this place sprays into a certain amount of pressurized air in cylinder 1, after this pressurized air and the fuel mix that sprays into earlier the gas pressure at the connection part place of gear 15 and gear 2 is increased.

After this in the extremely short time, as shown in Figure 3, second slidable sealing point 5 forms, and first firing chamber 6 forms, and most of mixed gas at this place is pressed into first firing chamber 6.Because not on the center line of gear 15 and gear 2, so just the volume of first firing chamber 6 that forms is bigger.

Rotation along with gear 15 (counterclockwise) and gear 2 (clockwise), as shown in Figure 1, when first firing chamber 6 rotates on the center line that just is positioned at gear 15 and gear 2, the volume of first firing chamber 6 reaches and minimizes, at this moment the air pressure of the mixed gas in first firing chamber 6 is the highest, under the effect of central control unit, and spark plug 11 sparkings, light the mixed gas in first firing chamber 6, the high temperature that the mixed gas burning produces makes the several times that raise suddenly of the air pressure in first firing chamber 6.

Because gear 15 and gear 2 are among the continuous rotation, so when after the mixed gas in first firing chamber 6 is lighted and passed through of short duration time-delay, producing blast, the center line of two gears has been left in first firing chamber 6, as shown in Figure 4, produce the blast back in the mixed gas burning and form first gas expansion chamber 18, the pressure (arrow among the figure is represented pressure) that first gas expansion chamber 18 produces is transferred on the tooth of gear 15 and gear 2, oppositely promotes the gear 15 and gear 2 rotations on both sides simultaneously.In this process, because work by combustion power by two-way utilization, so work by combustion power is fully utilized, has improved the utilization ratio of work by combustion power.

As shown in Figure 5, after gear 15 and gear 2 continue to rotate to an angle, first slidable sealing point 5 and second slidable sealing point 5 disconnect in succession, the depressurization state, and then, be positioned at the valve open of air inlet 16 of tail end of the connection part of gear 15 and gear 2, in cylinder 1, spray into a certain amount of pressurized air, at this moment, high temperature and flame in first gas expansion chamber 18 still exist, improve at pressurized air under the situation of more oxygen (combustion-supporting), make and fail the further fully burning of fuel of perfect combustion in the burning for the first time, form on the tooth that pressure that 19, the second gas expansion chamber 19 of second gas expansion chamber of High Temperature High Pressure produce is transferred to gear 15 and gear 2 equally (arrow among the figure is represented pressure), oppositely promote the gear 15 and gear 2 rotations on both sides simultaneously.When gear 15 and gear 2 rotate to exhaust vent 3 corresponding positions, a part of waste gas in this teeth groove is discharged into outside the cylinder 1, remaining waste gas (wherein still comprising the not clean-burning fuel of a part) is arrived and gas, oily suction port 8 and atomized water import 9 corresponding positions by the cingulum of gear 15 and gear 2, then begins identical next time cyclic process.

In above-mentioned running, can produce very big heat in the cylinder 1, high temperature may cause damage to a certain degree to the parts in the cylinder 1, thereby influence friction factor and sealing effect etc., so cylinder of the present invention also can be as conventional engines, at its outer wall radiating fin is set, adopts mode air-cooled or water-cooled to lower the temperature.

In addition, satisfy at needs under the situation of big driving power, a plurality of transmission shafts of the present invention can be coupled together, form multi-cylinder (as twin-tub, four cylinders etc.) motor, promote mutually between each motor, to reach the more powerful purpose of output.

Above-mentioned running has just been done detailed explanation to certain a pair of tooth in gear 15 and the gear 2 and the working procedure of teeth groove, in fact each in gear 15 and the gear 2 is all the same with said process to the working procedure of tooth and teeth groove, so, in a cycle period, what teeth gear 15 and gear 2 have, what and above-mentioned the same working procedure are just arranged, in the present embodiment, gear 15 is different with the number of the tooth of gear 2, is the cycle period of entire internal combustion engine with the cycle period of the few gear 15 of the number of tooth.Because the existence of twice gas expansion chamber so in a cycle period, produced inferior i.e. 12 the continuous Driving forces of 2N (N is the number of the tooth of gear 15) respectively on gear 15 and gear 2, utilizes work by combustion power fully.

Claims

1. environment protection type internal combustion engine, comprise the power plant in cylinder and the cylinder, cylinder is provided with the fuel air mouth, air inlet, exhaust vent and spark plug, it is characterized in that: the power plant in the described cylinder are: two gears by tooth and the mutual interlock of teeth groove are installed in cylinder, when the mutual interlock of teeth groove of the tooth of first gear and second gear, in a pair of tooth and teeth groove of mutual interlock fullest, the outward edge of the tooth both sides of first gear contacts with the inward flange of the teeth groove both sides of second gear and forms two slidable sealing points respectively, the outward edge of the tooth both sides of first gear, the inward flange of the teeth groove both sides of second gear and two common first firing chambers that form of slidable sealing point are provided with spark plug on the cylinder end piece of position, first firing chamber; Be the slidable sealing structure between the tooth top of described two gears and the inwall of described cylinder, promptly under the prerequisite that the tooth of gear can slide easily, be positioned as close to the formation sealing state between the tooth top of gear and the inwall of cylinder; The axle of the driving gear that the axle of described two gears and cylinder are outer connects as one, and by its position in cylinder of bearing fixing of cylinder driving gear outward; Sense of rotation with the close described cylinder wall of described gear is a direction, on described cylinder wall, be provided with exhaust vent earlier, after be provided with fuel air mouth and air inlet, with two corresponding respectively cylinder walls of gear on be respectively arranged with separately independently exhaust vent;

Wherein, the shape of the inward flange of the outward edge of the tooth both sides of described first gear and the teeth groove both sides of second gear meets the following conditions: in a pair of tooth and teeth groove of described mutual interlock fullest, line with the central point of two gears is a baseline, central point with first gear is the center of circle, the tooth of first gear is in ± 20 ° of scopes the time, and described two slidable sealing points all are in the slidable sealing state; When the tooth of first gear during just at-30 °, first slidable sealing point just forms the slidable sealing state;

And the tooth of first gear is six, and the tooth of described second gear is nine.

2. environment protection type internal combustion engine according to claim 1 is characterized in that: described air inlet is two, is arranged at corresponding with the connection part of described two gears respectively and is positioned on the top and terminal cylinder wall of gear sense of rotation.

3. environment protection type internal combustion engine according to claim 1 is characterized in that: described fuel air mouth is two groups, is separately positioned on two gears to distinguish on the corresponding cylinder walls.

4. according to claim 1 or 3 described environment protection type internal combustion engines, it is characterized in that: described fuel air mouth comprises gas, oily suction port and atomized water import.

5. environment protection type internal combustion engine according to claim 1 is characterized in that: described cylinder inner wall reduces the spatial volume in the described cylinder in the connection part indent of described two gears as far as possible.

6. environment protection type internal combustion engine according to claim 1, it is characterized in that: described exhaust vent is a tilt port, and the angle of its inclination meets the following conditions: the direction of exhaust vent from an end of cylinder inner wall to an end of the cylinder outer wall sense of rotation with adjacent gear as far as possible is consistent.

7. according to claim 1 or 3 described environment protection type internal combustion engines, it is characterized in that: described fuel air mouth is a tilt port, and the angle of its inclination meets the following conditions: the direction of fuel air mouth from an end of cylinder inner wall to an end of the cylinder outer wall sense of rotation with adjacent gear as far as possible is opposite.

8. environment protection type internal combustion engine according to claim 4, it is characterized in that: described fuel air mouth is a tilt port, and the angle of its inclination meets the following conditions: the direction of fuel air mouth from an end of cylinder inner wall to an end of the cylinder outer wall sense of rotation with adjacent gear as far as possible is opposite.