JPH01145951U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional front view of an internal combustion engine equipped with a variable compression ratio mechanism according to a first embodiment of the present invention.
FIG. 2 is a schematic longitudinal sectional front view of the internal combustion engine in a state where the compression ratio is changed. FIG. 3 is a schematic perspective view of the internal combustion engine. FIG. 4 is a schematic enlarged longitudinal sectional view of the guide connecting protrusion of the cylinder portion and the guide connecting groove of the crank portion of the internal combustion engine. Figure 5 shows
It is a schematic enlarged longitudinal cross-sectional view of another example of the same guide connection part. FIG. 6 is a schematic enlarged longitudinal sectional view of the moving and fixing mechanism of the internal combustion engine. FIG. 7 is a schematic enlarged longitudinal sectional view of the moving and fixing mechanism in a state where the compression ratio is changed. FIG. 8 is a schematic enlarged plan view of another example of the moving and fixing mechanism of the internal combustion engine. FIG. 9 is a schematic enlarged longitudinal sectional view of the moving and fixing mechanism. FIG. 10 is a schematic enlarged plan view of the movable and fixed mechanism in a state where the compression ratio is changed. FIG. 11 is a schematic enlarged longitudinal sectional view of the movable and fixed mechanism in a state where the compression ratio is changed. FIG. 12 is a schematic front view of an internal combustion engine equipped with a variable compression ratio mechanism according to a second embodiment. 1st
FIG. 3 is a schematic front view of the internal combustion engine in a state where the compression ratio is changed. FIG. 14 is a schematic vertical sectional front view of an internal combustion engine equipped with a variable compression ratio mechanism according to a third embodiment. FIG. 15 is a schematic longitudinal sectional front view of the internal combustion engine in a state where the compression ratio is changed. 1: cylinder block, 2: cylinder, 3: piston, 4: crankshaft, 5: connecting rod, 6: cylinder section, 7: crank section, 8: dividing plane, 13:
moving and fixing mechanism, 21: cylinder section, 22: crank section, 23: intermediate section, 24: dividing plane, 25: dividing plane, 31: cylinder section, 32: crank section,
33: Divided cylindrical surface.

Claims (1)

[Claims for Utility Model Registration] 1. A piston is slidably fitted into a cylinder formed in a cylinder block, a combustion chamber is formed between the cylinder and the piston, and a crankshaft bearing in the cylinder block is inserted into the cylinder through a connecting rod. In an internal combustion engine connected to a piston, the cylinder part including the cylinder of the cylinder block and the crank part including the crankshaft are separated and connected so as to be relatively movable, and the cylinder part and crank part of the cylinder block are moved relatively to a moving position. A compression ratio characterized in that a fixing mechanism is provided, and the distance between the cylinder and the crankshaft is changed by relative movement between the cylinder part of the cylinder block and the crankshaft, thereby changing the compression ratio of the combustion chamber. variable mechanism. 2 Divide the cylinder block into two parts, the cylinder part and the crank part, along a plane that is inclined to the axis of the cylinder and parallel to the axis of the crankshaft. 2. The variable compression ratio mechanism according to claim 1, wherein the variable compression ratio mechanism is configured to be movable in a direction perpendicular to the axis of the crankshaft. 3 The cylinder block is divided into two parts, a cylinder part and a crank part, by a cylindrical surface having an axis perpendicular to the axis of the cylinder and parallel to the axis of the crankshaft, and the cylinder part is divided from the crank part. 2. The variable compression ratio mechanism according to claim 1, wherein the variable compression ratio mechanism is configured to be rotatable around the axis of the cylindrical surface. 4. The variable compression ratio mechanism according to claim 1, wherein the cylinder block is divided into three or more parts and connected to each other so as to be relatively movable.