CS239361B1 - A device for changing the compression ratio of a piston combustion engine - Google Patents

Abstract

The internal combustion engine crankshaft carrier is designed to change the compression space while the engine is running. The crankshaft carrier (1) is a cylindrical body that is rotatably mounted in the engine block (2) and the usual crankshaft (3j) is mounted in it so that their axes of rotation are offset from each other. By turning the carrier (lj), the position of the crankshaft (3) changes, which results in changes in the compression space.

Description

The invention relates to the volume changes of the compression chamber of an internal combustion engine. <

The known methods of changing the volume of the compression chamber are achieved either by changing the length of the connecting rod, either by inserting or breaking the hydraulic cylinder, by changing the position of the piston bottom against the piston pin, or by placing the connecting rod on the is filming on the fly. The disadvantages of these methods are usually the necessity of a complicated hydraulic circuit, an increase in the weight and complexity of the movable parts, in particular the sliding parts of the engine, as well as the achievement of the same running of all cylinders.

These disadvantages are overcome by the invention, which is based on the fact that the crankshaft is mounted in a crankshaft carrier (another carrier). The carrier is a cylindrical body whose main dimensions are such that a crankshaft can be received therein. In the carrier housing there are holes for connecting rods and crankshaft outlets. The carrier is mounted rotatable about its longitudinal axis in the engine block. The crankshaft is mounted in the carrier so that the carrier axis and the crankshaft axis are parallel and spaced apart. By rotating the gripper, the distance between the crankshaft axis and the cylinder heads is changed and the compression space is obtained.

The use of the invention will make it possible to better manage the design of the compression space without increasing the weight and complexity of the moving parts of the engine, since these remain unchanged. The same compression space will be provided in all cylinders at the same time, as this results from the overall arrangement.

An example of an embodiment of an automotive engine with a vacuum power control according to the invention is shown in the attached drawing. Figure 1 shows a longitudinal section of the engine, Figure 2 shows a cross section of the engine with the crankshaft position in the upper limit position and Figure 3 shows a cross section of the engine with the crankshaft position in the lower limit position. Images are drawn by a rectangular projection.

The carrier 1 is stored in. The crankshaft 3 with the connecting rod 8 is mounted in the drive shaft on the right side (Fig. 1j of the camshaft drive 4 and serves to compensate for the movement of the crankshaft 3 relative to the engine block 2. A flywheel is mounted on the left side of the crankshaft 3. and a conventional clutch and gear assembly, the housing 5 of which is rotatably coupled to the carrier 1. The engine block 2 and the housing of the transmission and gear assembly 5 are independently resiliently mounted in the automobile so as to allow horizontal displacement relative to horizontal movement of the crankshaft 3 in the block. motor 2.

The carrier 1 is at the bottom - provided with a door spring 6, which tries to turn the carrier 1 to the left and thus the boy's shaft 3 shifts! to the upper extreme position. This condition corresponds to the engine running with the suction turned off, when the amount of mixture blended is small. By sucking in a large amount of the mixture with the suction open, medium forces acting on the pistons will increase and the carrier 1 will be rotated to the right by applying these forces to the crankshaft 3. Turning the carrier 1 to the right 'compresses the return spring 6. The oscillation of the carrier 1 is dampened by the rotating blade 7.

The invention can be used in the manner described in the first part, wherein the return spring 6 maintains an approximately constant compression ratio which tends to change its value due to the variable suction amount of the mixture. Furthermore, the invention can be used for engines where a change in the compression ratio is required because of a fuel change. In this case, the carrier 1 will be rotated e.g. actuator. However, this solution does not preclude the simultaneous control of the compression ratio under vacuum power control. Engines for various types of fuel can be designed to adjust the compression ratio both in the still and on the fly. .

The power transmission from the engine to the driven machine can be converted either as shown in the drawing that the crankshaft axis of the engine and the driven machine axis are constantly identical, or the power transmission can be provided by a cardan shaft or by another coupling allowing the axes to move input and output shafts.

In the case of using the PTO shaft as a drive to the gearbox, the PTO shaft can be inserted into the hollow input shaft of the gearbox, thus avoiding any increase in the length of the assembly or a substantial increase in weight.

Powered machine can be in addition to the gearbox, a generator, electric generator, aircraft propeller, or other.

Claims (1)

239361 OBJECTIVE The device changes the compression ratio of the piston combustion engine intended primarily for the vacuum control of the output, but also for the gasoline fuel engines, characterized in that the crankshaft (3) is housed in the carrier. ) of the crank INVENTION of the shaft (30, which is cylindrical in shape and rotated in the engine block (2j, wherein the axis of rotation of the crankshaft (3) and the axis of rotation of the carrier (1j are parallel and not identical.