Quasi-free piston internal combustion engine

Abstract

The invention discloses a quasi-free piston internal combustion engine. In the internal combustion engine, a power lever is fixed on each piston; an isodirectional linkage device is arranged between two adjacent power levers which move in the same direction; gear teeth are respectively arranged on opposite sides of two adjacent power levers which move in opposite directions, and are engaged with the same synchronous gear respectively; a crank link mechanism is used for restricting the piston stroke, and provides timing and power for a gas distribution mechanism of the internal combustion engine and an oil injection system. The internal combustion engine outputs either linear power or pendulum rotating power, realizes energy transfer among cylinders through a simple structure, and overcomes the defect of energy depreciation in traditional internal combustion engine caused by the change of force arm coefficients of the crank link mechanism; and moving members have small inertia force and run stably, and positions of an upper dead point and a lower dead point of the piston can be accurately controlled in use, so the compression ratio is ensured to be fixed and constant.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a quasi-free piston internal combustion engine. Background technique [0002] In the traditional internal combustion engine, the heat energy released by fuel combustion is converted into the reciprocating linear motion of the piston through the combustion chamber composed of the piston-cylinder part, and then the reciprocating linear motion of the piston is converted into the rotary motion of the crankshaft by the crankshaft-connecting rod mechanism. So far, the mechanical The power is output by the crankshaft. [0003] As we all know, the indicated work of an internal combustion engine is directly proportional to the cylinder pressure and the arm coefficient of the crank linkage mechanism. To obtain the maximum indicated work, the highest combustion pressure of the cylinder should appear at the maximum arm coefficient. The characteristics of the crankshaft a...

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Problems solved by technology

[0005] 1. The mover of the linear generator makes a reciprocating linear motion together with the power rod. The mass of the reciprocating part is too large, which generates a large inertial force during operation, resulting in strong vibration of the unit;

[0006] 2. Using the air cushion to restrict the stroke of the piston, the position of the upper and lower dead centers of the piston cannot be precisely controlled, and the compression ratio is not fixed

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