WO2018093279A1

WO2018093279A1 - The piston of the ecological clean, two-stroke internal combustion engine

Info

Publication number: WO2018093279A1
Application number: PCT/PL2017/000103
Authority: WO
Inventors: Jacek MAJEWSKI
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-18
Filing date: 2017-10-17
Publication date: 2018-05-24
Anticipated expiration: 2019-05-18
Also published as: PL235520B1; PL419505A1; DE112017005831T5

Abstract

The subject of the invention is a piston of the ecological clean, two-stroke internal combustion engine in the field of mechanics. It can be used in two-stroke, new generation engine especially in the cars, motorcycles, vehicles, aircrafts, water crafts, or stationary devices like generators. The mounted on a connecting rod pin, a piston of the internal combustion engine of different diameters, with piston rings at both ends, characterized by the fact, that entire lateral surface of the piston consists of at least two, oil lubricated zones (1, 3), and there is an oil-free, non lubricated zone (2) between them, where in the lubricated part of larger diameter of piston (3), comprises a set of piston rings, contains at least one seal rig (4), and at least one compression ring (5), but lubricated part of smaller diameter of piston (1), are located at least two, opposite sets of seal rings (6), and compression rings (7), between these sets is evenly distributed oil channel (8), multi- or one-piece lubricant (9) ensuring efficient and even distribution of oil.

Description

The piston of the ecological clean, two-stroke internal combustion engine.

The subject of the invention is a piston of the ecological clean, two-stroke internal combustion engine in the field of mechanics. It can be used in two-stroke, new generation engine especially in the cars, motorcycles, vehicles, aircrafts, water crafts, or stationary devices like generators.

They are different solutions of two-stroke engine pistons. All of them require use an oil-fuel mixture, but we know also the attempts of create an engines with the pressure lubricated pistons, on the pattern of four-stroke engines. One of them is a piston design, according to the patent application P.407765 "The piston with the rings of two-stroke internal combustion engine". This solution is too new, to find practical application. The piston according to this invention differs from this one described above, not only in the construction, but in the fact that it can be applied to the ordinary engine with the traditionally crankshaft, even in two cylinder engine. This piston has an oil- free zone, that is used as a wall of an initial compression chamber. It does not expose oil to contact with air, or air-fuel mixture. The idea of the double diameter piston has been known for years. Engine with such pistons were developed using a larger piston diameter as an initial compression part of piston, but smaller piston diameter as a main part of piston. It was a very beneficial solution, which in relation to traditional one where the crankcase was also the initial compression chamber, because significantly improved loading of the cylinder. However it still had a major defect, it still needed to add the oil to the fuel. The solution of this invention can fix this problem. Using it, will allow to use previous solutions of the internal combustion engines to create ecological clean, two stroke, new generation internal combustion engine. Two-stroke engine will no more need to add oil to the fuel. It will also no use a special crankshaft. In addition to the benefits of the double power, and double torque, the invention opens up other possibilities. This is the simple solution, uses well-know, and proven components. What is the most important, this is ecological clean, rivaled, or even superior to existing four-stroke engines.

The essence of the invention is constructively simple, mounted on a connecting rod pin, a piston of the internal combustion engine of different diameters, with piston rings at both ends, characterized by the fact, that entire lateral surface of the piston consists of at least two, oil lubricated zones, and additionally, there is an oil -free, non lubricated zone between them. The lubricated lower part of piston, of larger diameter, working as a initial compression piston, comprises a set of piston rings, contains at least one seal rig, and at least one compression ring, but upper lubricated part of piston, of smaller diameter, working as main part of piston, comprises at least two, opposite sets of seal, and compression rings, in such a way , that oil could not escape beyond their outline. Between these sets is evenly distributed oil, multi- or one-piece lubricant, as the ring, tampon, groove, or holes, ensuring efficient and even distribution of oil. The piston is mounted on the connecting rod pin, so it can be used traditionally crankshaft. Two outer lubrication zones require lubricate, because they have a rings. Upper lubrication zone can be lubricated splash, or under pressure. The oil supplied by channels from the inside of the piston. Upper rings of the main part of piston seals piston relative to the cylinder, and prevents combustion chamber from the oil. Bottom rings of the main part of piston seals piston relative to the cylinder, and prevents non lubricated zone called initial compression chamber, from the oil. Middle part of piston should be not lubricated. The lateral surface of this part does not come into contact with cylinder, because as it has a little smaller diameter. It is also internal wall of the initial compression chamber. Oil, that would get into this zone, would pollute the flowing air, or air-fuel mixture. Larger piston diameter, with a traditional ring set, constituting lower lubrication zone, cooperates with the initial compression part of cylinder, which is the outer wall of initial compression chamber. This rings are mounted like in traditional piston, and lubricated with splash by the oil from crankcase. Such a setting of the rings causes sealing initial compression chamber from crankcase, and prevent the oil from penetrating there. Excess oil from the both lubrication zones is drained through holes to the crankcase.

The piston of the invention opens up new possibilities for easy construction of the entire range ecological clean, new generation, two-stroke combustion engines. Much higher dynamics, double power and torque, are achieved without increasing mechanical stress of particular parts. By eliminating two unnecessary strokes, the engine has less internal resistance, and does not need to overcome some of the inertia force of the piston-crankshaft system. By keeping the same power, the cars will be able to have significantly smaller engines, which will directly reduce production costs. In the hybrid cars , where combustion engine performs only auxiliary functions, this is especially important. Also important is ease to get a supercharging, without additional devices, control systems, intercoolers, and at zero costs. Supercharging appears at the quotient of initial compression piston diameter to the main piston diameter over 1.4. It starts from idle, does not have a time delay, no additional drive required, no special lubrication require, and no special service. It is also devoid of any disadvantages of existing turbochargers.

The subject of the invention is illustrated as examples in drawing, where Fig.1 and Fig. 2 shoves mounted on connecting rod pin, the double diameter piston, with sets of the rings. There are indicated a positions of the particular rings, lubrication zones and oil free zone. Use arrows and description to illustrate the example of oil circulation, and lubrication of the rings. Fig 3 shows the application of the pistons according to the invention to the two cylinder, two-stroke v-engine.

Application of the invention shown in the example of a two cylinder, two-stroke v-engine, where used the double diameter pistons. Initial compression chamber 13 of the first cylinder is connected to the combustion chamber 12 of the second cylinder using inlet channel 1 1. The second cylinder is connected to the first one according to the same method. This alternate solution is necessary, because when the piston is going up, the initial compression chamber is decreasing, while filler of the two- stroke engine cylinder is only possible, when the new load is pressed into cylinder, when the piston is in the lower position. So, the position of the initial compression piston relative to position of the main piston should be shifted by a certain angle. Depending on the configuration, number of cylinders, or purpose of use, for the most of v-engines, or line-engines, this angle should be between 90°, and 180°. The suction valve 15 is typical valve used in two-stroke engines, but inlet channel valve 16 protects the load in the inlet channel 1 1 against an inaccurate retraction. The engine pistons are lubricated in two ways. The upper lubrication zone is lubricated with splash or pressure, and the lower splash. The oil return to the crankcase 14 is the same as in traditional four-stroke engine. There may be many examples of the uses invention. These can be multi- cylinder engines with different configuration, and number of cylinders.

Claims

Claim

The mounted on a connecting rod pin, a piston of the internal combustion engine of different diameters, with piston rings at both ends, characterized by the fact, that entire lateral surface of the piston consists of at least two, oil lubricated zones (1 ,3), and there is an oil-free, non lubricated zone (2) between them, where in the lubricated part of larger diameter of piston (3), comprises a set of piston rings, contains at least one seal rig (4), and at least one compression ring (5), but lubricated part of smaller diameter of piston (1 ), are located at least two, opposite sets of seal rings (6), and compression rings (7), between these sets is evenly distributed oil channel (8) , multi- or one-piece lubricant (9) ensuring efficient and even distribution of oil.