CN203050878U - Return stroke acting type combustion motor - Google Patents

Abstract

The utility model relates to the field of internal combustion engines, and discloses a reciprocating stroke work type internal combustion engine, which is characterized in that it comprises a cylinder and a crankcase; the cylinder comprises an upper cylinder head, a lower cylinder head, a cylinder body, a piston located in The straight connecting rod connected to the piston; the crankcase includes an upper case cover and a lower case cover, and a crankshaft and a crank connecting rod are arranged in the crankcase; the straight connecting rod slides out of the lower cylinder head and slides into the The crankcase is movably connected to the crank connecting rod; the piston separates the cylinder from the upper combustion chamber and the lower combustion chamber, and the upper combustion chamber and the lower combustion chamber are respectively provided with independent intake pipes and exhaust pipes. The upper cylinder head and the lower cylinder head are respectively provided with spark plugs corresponding to the upper combustion chamber and the lower combustion chamber.

Description

A kind of reciprocating stroke work type internal combustion engine

technical field

The utility model relates to the field of internal combustion engines, in particular to a reciprocating stroke work type internal combustion engine.

Background technique

There are many types of internal combustion engines in common use today, and reciprocating piston internal combustion engines are often configured as two-stroke or four-stroke. Such internal combustion engines may include one or more independently reciprocating pistons within cylinders arranged in a variety of different configurations, including "V", inline, or boxer internal combustion engines. These pistons, usually coupled to the crankshaft, draw the fuel/air mixture into the cylinders on the downstroke and compress the fuel/air mixture on the upstroke. The fuel/air mixture is ignited by a spark plug or other device near the top of the piston's stroke, and the resulting combustion and expansion drives the piston down, thereby converting the chemical energy of the fuel into mechanical energy of the crankshaft.

It is well known that conventional reciprocating piston internal combustion engines have many limitations, such as that a large amount of chemical energy of the fuel is wasted in the form of heat and friction. As a result, only about 25% of the fuel energy in a typical car or motorcycle internal combustion engine is really converted into kinetic energy for crankshaft work.

Contents of the invention

The problem to be solved by the utility model is: to provide a reciprocating stroke working type internal combustion engine without increasing the number of cylinders or piston diameter of the piston internal combustion engine, which can double the power of the internal combustion engine and make the torque output of the internal combustion engine more balanced.

In order to solve this technical problem, the utility model adopts the following technical solutions to realize.

A kind of back-and-forth stroke working type internal combustion engine is characterized in that, comprises cylinder and crankcase; Described cylinder comprises upper cylinder cover, lower cylinder cover, cylinder block, the piston that is positioned at the center of cylinder block, the straight connecting rod that fixedly connects piston; The crankcase includes an upper case cover and a lower case cover, and a crankshaft and a crank connecting rod are arranged in the crankcase; the straight connecting rod slides out of the lower cylinder head and slides into the crankcase to flexibly connect the crank Rod; the piston separates the upper combustion chamber and the lower combustion chamber from the cylinder, and the upper combustion chamber and the lower combustion chamber are respectively provided with independent intake pipes and exhaust pipes, and the upper cylinder head and the lower cylinder head are respectively provided with Spark plugs corresponding to the upper and lower combustion chambers.

The characteristics and further improvement of the above-mentioned technical scheme are:

The lower cylinder head of the cylinder and the upper case cover of the crankcase are an integral structure.

The middle part of the piston is provided with an annular oil groove, and the middle part of the cylinder block corresponding to the cylinder is provided with a lubricating oil hole.

In the reciprocating stroke work type internal combustion engine of the present utility model, the piston separates the cylinder from the upper combustion chamber and the lower combustion chamber, and the upper combustion chamber and the lower combustion chamber are respectively provided with mutually independent intake pipes and exhaust pipes, and the upper cylinder head, the lower combustion chamber The cylinder head is respectively provided with spark plugs corresponding to the upper combustion chamber and the lower combustion chamber. In this way, the upper combustion chamber and the lower combustion chamber have alternate work functions respectively, so that the work done by one cylinder is equivalent to the work done by two cylinders of two-stroke internal combustion engines at the same time, and the piston can do work no matter whether it is an upward or downward stroke. The above structure can double the power of the internal combustion engine and make the torque output of the internal combustion engine more balanced and stable.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Fig. 1 is a kind of back-and-forth stroke working type internal combustion engine explosion schematic diagram of the utility model;

Fig. 2 is an explosion schematic diagram of another viewing angle of Fig. 1;

In the figure: 1, spark plug; 2, upper cylinder head; 3, cylinder block; 4, lubricating oil hole; 5, intake pipe; 6, annular oil groove; 7, piston; 8, straight connecting rod; 9, crank connecting rod; 10. Lower cylinder head; 11. Upper case cover; 12. Crankshaft; 13. Lower case cover; 14. Exhaust pipe; 15. Gas ring; 16. Oil ring.

Detailed ways

With reference to Fig. 1, Fig. 2, illustrate a kind of back-and-forth stroke working type internal combustion engine of the present utility model, main cylinder and crankcase.

Wherein, the cylinder comprises an upper cylinder head 2, a lower cylinder head 10, a cylinder block 3, a piston 7 located at the center of the cylinder body 3, and a straight connecting rod 8 fixedly connected to the piston 7; the piston 7 separates the cylinder from the upper combustion chamber and the lower combustion chamber, Corresponding to the upper combustion chamber and the lower combustion chamber, an intake pipe 5 and an exhaust pipe 14 independent of each other are respectively provided, and the upper cylinder head 2 and the lower cylinder head 10 are respectively provided with spark plugs 1 corresponding to the upper combustion chamber and the lower combustion chamber. The middle part of the piston 7 is provided with an annular oil groove 6, and the middle part of the cylinder body 3 corresponding to the cylinder is provided with a lubricating oil hole 4 for lubrication between the piston 7 and the cylinder body 3. Gas rings 15 and oil rings 16 are respectively provided near the two ends of the piston 7 for sealing.

Wherein, crankcase comprises upper case cover 13, lower case cover 13, is provided with crankshaft 12, crank connecting rod 9 in the crankcase; Connect the crank connecting rod 9, and the crank connecting rod 9 is movably connected to the crankshaft 12. In this embodiment, the lower cylinder cover 10 of the cylinder and the upper case cover 11 of the crankcase are designed as an integral structure, wherein the section of the lower cylinder cover part is preferably larger than the section of the upper case cover part, so that the spark plug can be installed obliquely on the lower cylinder cover. part, and extend into the cylinder. Such an overall structure only needs to be provided with a set of air ring and oil ring for sliding sealing of the piston rod.

When the pistons move back and forth in the cylinder, they do work, inhale and exhaust each other. The actions between the work and the punching stroke are complementary. When one end is doing work, it drives the crankshaft, and at the same time it just compresses the gas at the other end. When the upper combustion chamber works to the maximum stroke, the lower combustion chamber just finishes compressing the fresh combustible gas. At this time, the lower combustion chamber ignites the fresh mixed gas, and the lower end starts to do work, which in turn pushes the piston up to do work. When the piston moves upward, the upper combustion chamber performs exhaust, air intake and ignition at one time. When the piston goes up to the top dead center, the upper combustion chamber just finishes compressing the fresh gas. At this time, the upper combustion chamber ignites the fresh mixed gas, pushes the piston to go down to do work, and the cycle repeats. This also solves the problem of absolute synchronization of the twin-cylinder internal combustion engines.

The reciprocating stroke working type internal combustion engine of the utility model has a compact structure, can double the power of the internal combustion engine without increasing the number of cylinders or the diameter of the piston of the piston internal combustion engine, and makes the torque output of the internal combustion engine more balanced.

Although the embodiments of the present utility model have been described above in conjunction with the accompanying drawings, the present utility model is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative, instructive, and not limiting sexual. Under the enlightenment of this specification, those skilled in the art can also make many forms without departing from the protection scope of the claims of the present invention, and these all belong to the list of the protection of the present invention.

Claims (3)

1. A back-and-forth stroke work type internal combustion engine is characterized in that, comprises cylinder and crankcase; Described cylinder comprises upper cylinder head, lower cylinder head, cylinder block, the piston that is positioned at cylinder body center, the straight connecting rod that is fixedly connected piston; The crankcase includes an upper case cover and a lower case cover, and a crankshaft and a crank connecting rod are arranged in the crankcase; the straight connecting rod slides out of the lower cylinder head and slides into the crankcase to flexibly connect the Crank connecting rod; the piston separates the upper combustion chamber and the lower combustion chamber from the cylinder, and the upper combustion chamber and the lower combustion chamber are respectively provided with independent intake pipes and exhaust pipes. The upper cylinder head and the lower cylinder head The spark plugs corresponding to the upper combustion chamber and the lower combustion chamber are respectively arranged. 2. The reciprocating stroke working type internal combustion engine according to claim 1, wherein the lower cylinder head of the cylinder and the upper case cover of the crankcase are an integral structure. 3. The reciprocating stroke power-working internal combustion engine according to claim 1, wherein an annular oil groove is arranged in the middle of the piston, and a lubricating oil hole is arranged in the middle of the cylinder block corresponding to the cylinder.

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