RU108493U1 - FOUR-QUALITY FOUR-CYLINDER STABILIZED INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

The utility model relates to the field of mechanical engineering, in particular to engine building. The technical result is a complete balancing of the piston engine. The essence of the invention lies in the fact that the engine consists of four cylinders with axles located in the same plane at an angle of 90 degrees to each other and forming a square with crankshafts at its vertices, eight pistons, four central and four fork rods mounted in pairs on four crankshafts. Paired central and forked cranks are located on different necks of a cranked shaft, but in one plane of swing. This arrangement avoids longitudinal moments. The connecting rod neck of the forked connecting rod consists of two halves, between which is located the neck of the central connecting rod. The angle between the cranks of the twin rods is 180 degrees. The inertia forces of the reciprocating motion of the masses in the internal combustion engine with oppositely moving pistons are mutually annihilated. The location of the cranks at an angle of 180 degrees makes it possible to mutually destroy the centrifugal forces from the rotating masses and, at the same time, to organize the even alternation of the working strokes in the cylinders with a 90 ° shift in rotation of the crankshafts.

Description

The utility model relates to the field of mechanical engineering, in particular, to engine building.

Known reciprocating multi-shaft internal combustion engines with oppositely moving pistons (see Internal Combustion Engines: Design and Strength Analysis of Piston and Combined Engines. / Under the editorship of A.S. Orlin, I.T. Kruglov. - M.: Mechanical Engineering, 1984 . -384 p., Ill.).

In the known engine, the axes of the cylinders are located in different planes at an angle of 60 degrees to each other, forming an equilateral triangle, at the tops of which crankshafts are installed. The arrangement of the cylinders in different planes leads to the appearance of longitudinal moments from the inertia forces of the reciprocating mass movements.

The closest in technical solution is a three-shaft three-cylinder internal combustion engine (see RU No. 2346169, F02B 75/28, 2009), adopted as a prototype.

In this engine, the axes of all the cylinders are located in the same plane, which eliminates the longitudinal moments from the inertia forces of the reciprocating moving masses of the crank mechanism (KShM). The forces of inertia in an internal combustion engine with oppositely moving pistons are mutually annihilated.

However, in the prototype engine, the centrifugal forces from the rotating masses are not balanced due to the arrangement of the cranks of the forked and central connecting rods at an angle of 60 ° to each other.

The objective of the utility model is to create a four-shaft four-cylinder fully balanced engine.

To solve this problem, a four-shaft four-cylinder internal combustion engine has been developed, in which the cylinder axes are located in the same plane at an angle of 90 degrees to each other, forming a square with crankshafts at its vertices. The engine contains eight pistons, four central and four forked rods mounted in pairs on crankshafts. For all shafts, the forked and central connecting rods are mounted on different connecting rod necks, but in the same swing plane. The connecting rod neck of the forked connecting rod consists of two halves, between which is located the neck of the central connecting rod.

The difference is that the angle between the cranks of the twin connecting rods is 180º.

Figure 1 shows a diagram of the proposed engine, where 1 - crankshafts; 2 - pistons; 3 - connecting rods. The pistons of cylinder A are at top dead center (TDC). When the crankshafts are rotated through an angle of 90 °, the pistons of cylinder B will be in the TDC, when they are rotated through 180 ° - the pistons of cylinder B, and when the shafts are rotated 270 ° - the pistons of cylinder D. Thus, the engine will have a uniform alternation of working strokes.

Figure 2 shows a diagram of the crank mechanism. The central connecting rod 1 is located on the neck 2. The forked connecting rod 3 is located on the connecting rod neck 4, divided into two halves by the cheeks 5 and the neck 2 of the central connecting rod 1.

The angle between the cranks 5 and 6, respectively, of the central and forked connecting rods (Type A) is 180º. This arrangement allows you to mutually destroy the centrifugal forces of the rotating masses of the cranks of the central and fork connecting rods, and the piston ICE becomes completely balanced.

Claims (1)

Four-shaft four-cylinder balanced internal combustion engine, consisting of four cylinders with axles located in the same plane at an angle of 90 ° to each other and forming a square with crankshafts at its vertices, eight pistons, four central and four fork connecting rods mounted in pairs on different connecting rods the necks of four crankshafts, characterized in that the angle between the cranks of the twin connecting rods is 180 °.