Two-slider crank mechanism

[AndreyR29]

To create faster and more economical internal combustion engines, I propose to use my invention - Riyanov double-slider crank mechanism (Two-slider crank mechanism). I received 4 patents in Russia (№ 2634851), China (№ 3349271), Japan (№ 6373516) and the UK (№ 3530879) for my invention, which can be used to create more environmentally friendly and faster engines, generators or in other projects.

SUBSTANCE: crank double-slider mechanism includes a crank, two connecting rods and two sliders. The second connecting rod is connected to the first slider at one end, and to the second slider at the other end. The second connecting rod length is equal to the sum of the double crank length and the distance between the connection point of the second connecting rod with the first slider in the initial phase of its movement measured in the direction of the first slider travel and the longitudinal axis of the second slider.

EFFECT: ensured full turn of the crank in one stroke of the extreme slider in the chain in one direction.

The unconditional effect of the two-slider crank mechanism is overcoming the limitation in the number of revolutions per minute in the internal combustion engine for the same working stroke of the slider, which can be used in internal combustion engines requiring high speed (for example, drones (land, air, water), subcompact cars, motorcycles), as well as in electric generators based on internal combustion engines, wave electric generators.

The key predicted effects are a gain in speed, a reduction in fuel consumption, the use of fuel with a lower octane number as a result of an increase in the working stroke of the slider, simplicity of design (gears are not used to double the speed).

[AndreyR29]

Animation of the mechanism.

[swansont]

3 hours ago, AndreyR29 said:

I received 4 patents in Russia (№ 2634851), China (№ 3349271), Japan (№ 6373516) and the UK (№ 3530879) for my invention

!

Moderator Note

Congratulations.

This is a discussion forum. What is the proposed topic of discussion here?

 

[studiot]

Yes congratulations you have designed a folded scotch yoke.

[OldTony]

I'm having difficulty visualising a practical application as the two connecting rods seem to need to pass through the walls of their respective cylinders. Also although the horizontal piston moves faster than the vertical piston you still only get one revolution of the crank per stroke. I presume you are relying on momentum to carry the horizontal piston through its mid point. However perhaps, however rarely,  due to a fault such as an engine misfire it could bounce back and reverse at the mid point which I can imagine would be catastrophic for an internal combustion engine. 

Edited October 26 by OldTony

[AndreyR29]

The subject of discussion is the possibility of practical application of the proposed mechanism in internal combustion engines.

In existing internal combustion engines, the crankshaft makes half a revolution per stroke of the slider in one direction. In the proposed mechanism, it makes a full revolution per stroke of the outermost slider in the chain in one direction.

[AndreyR29]

I propose to use internal combustion engines based on the proposed mechanism primarily in unmanned aerial vehicles.

[studiot]

Look up scotch yoke actuators.

[AndreyR29]

2 hours ago, studiot said:

Найдите приводы scotch yoke.

In the scotch yoke mechanism, the crank makes half a revolution in one stroke of the slider. In the proposed mechanism, it makes a full revolution in one stroke of the outermost slider in the chain.

[sethoflagos]

3 minutes ago, AndreyR29 said:

In the scotch yoke mechanism, the crank makes half a revolution in one stroke of the slider. In the proposed mechanism, it makes a full revolution in one stroke of the outermost slider in the chain.

All the Scotch Yoke actuators I've worked with have been quarter-turn per.piston stroke, though in principle this could be varied.

More to the point, the slider moved parallel to the piston on (effectively) a variable throw crank.

The OP design principle appears quite different.

[AndreyR29]

I am looking for people who are fluent in this subject and are willing to use my patents to create fuel-efficient and fast engines to meet people's needs and update their product line.

[exchemist]

44 minutes ago, AndreyR29 said:

I am looking for people who are fluent in this subject and are willing to use my patents to create fuel-efficient and fast engines to meet people's needs and update their product line.

It seems to me the first issue you would have to address would be how to deal with the point made by @OldTony that, if it were a trunk piston engine,  there would need to be a slot cut in the side of any cylinder, to accommodate the motion of "connecting rod 2" in your diagram. Clearly that can't work, so a trunk piston design is ruled out. I presume you could deal with that by a crosshead type of design in which, say, a pair of opposed cylinders is joined by a horizontally moving piston rod, connected by "slider 2" acting as a crosshead. But that will take up quite a lot of space. Have you given any thought to this issue?  

Maybe it could work in a marine engine, where space is not a critical issue. One advantage of it could be the long throw of the pistons, compared to the crank, which could give a long expansion for each power stroke, giving greater efficiency. Marine crosshead engines can have stroke:bore ratios up to 4  for this very reason. But then, in marine applications the propeller speed is generally low compared to IC engine rpm, so something that doubles the rpm is not what you want. 

On reflection I think I could perhaps more easily see your idea working in reverse as a pump, in which the crank drives the pistons.

What I struggle to see is how this can give a "fast" engine. With IC engines the challenge is usually to bring the speed down, from the high speeds needed for combustion to the speeds needed for motive power. The exception is marine engines burning residual fuel oil, which can work with engine speeds as low as 75-100rpm, at which speed they are directly coupled to the propeller, avoiding the need for a gearbox that can handle outputs that can be in excess of 40MW. But then you don't want to double the speed of the output shaft.   

 

Edited November 1 by exchemist

[AndreyR29]

Thank you for your comment!

To avoid the contact of the connecting rod with the walls of the combustion chamber cylinder, an extension element can be attached to the outside of the piston inside the combustion chamber, which will connect the slider and the connecting rod. That is, in the initial position, the connecting rod is connected to the extension element and is located outside the combustion chamber.

In my opinion, the acceleration of revolutions can be useful for unmanned aerial vehicles with piston internal combustion engines to increase their speed of movement. The engine can also be small in size for low-power drones.

If we do not take into account the speed factor, then in my opinion this design can be used for low-octane fuel, when there is no explosion in the combustion chamber, but a slower combustion. This can also be used in marine engines to save fuel.

Also, this design may be useful for power generators based on the energy of sea waves.

[exchemist]

1 hour ago, AndreyR29 said:

Thank you for your comment!

To avoid the contact of the connecting rod with the walls of the combustion chamber cylinder, an extension element can be attached to the outside of the piston inside the combustion chamber, which will connect the slider and the connecting rod. That is, in the initial position, the connecting rod is connected to the extension element and is located outside the combustion chamber.

In my opinion, the acceleration of revolutions can be useful for unmanned aerial vehicles with piston internal combustion engines to increase their speed of movement. The engine can also be small in size for low-power drones.

If we do not take into account the speed factor, then in my opinion this design can be used for low-octane fuel, when there is no explosion in the combustion chamber, but a slower combustion. This can also be used in marine engines to save fuel.

Also, this design may be useful for power generators based on the energy of sea waves.

Ah, now your last idea could have something to it. There you certainly do want to convert a slow oscillating motion into a faster rotary motion. 

[AndreyR29]

According to the law of conservation of energy, it is impossible to achieve an increase in power and speed, since the total amount of all forms of energy remains constant. In the proposed invention, the main effect is to increase the speed of revolutions, but with a decrease in power due to a reduction in the length of the crank with the same stroke of the slider compared to the classic crank-slider mechanism. 

A possible benefit for researchers and manufacturers of a new product is making a profit from selling a new product that is in demand on the market.

The possible effects - increasing the engine speed, saving fuel or using fuel with a lower combustion rate, which will have a positive effect on the environment.

Possible applications - low-power engines, piston internal combustion engines for aircraft, electric power generators, including those based on the energy of sea waves. The engine can also be small in size for low-power drones.

If we do not take into account the speed factor, then in my opinion this design can be used for low-octane fuel, when there is no explosion in the combustion chamber, but a slower combustion. This can also be used in marine engines to save fuel.

If the task is to create a powerful and fast engine with overcoming the speed limit, then, using the proposed mechanism, this can be achieved by increasing the volume of the combustion chamber.

The problems that may arise during its creation, such as friction, vibration, weight, dimensions or seals, can be overcome using standard engineering solutions.

In addition, in the case of using fuel with lower flammability, in my opinion, it is possible to use parts made of composite materials in the engine, which will reduce the weight of the structure.

I am attaching an animation of the mechanism’s operation with a different arrangement of links, as well as a schematic diagram taking into account the combustion chamber.

Link to my invention

https://patents.google.com/patent/EP3530879B1/en

Edited November 10 by AndreyR29