Double-crankshaft-contained variable-compression-ratio Atkinson-cycle internal-combustion engine mechanism

Abstract

The invention discloses a double-crankshaft-contained variable-compression-ratio Atkinson-cycle internal-combustion engine mechanism, which is an internal-combustion engine technology and is used for improving the usability of an Atkinson-cycle internal-combustion engine and improving the thermal efficiency of the internal-combustion engine to enable the thermal efficiency to be approximate to the highest theoretical efficiency of a Carnot cycle. The mechanism comprises a rocking arm, a second crankshaft, a connecting rod of the second crankshaft, a driving chain, a phase regulator and a derived three-crankshaft Atkinson internal-combustion engine mechanism, wherein the rocking arm is used for connecting a piston connecting rod and a connecting rod of a first crankshaft; the second crankshaft and the connecting rod of the second crankshaft are used for driving the rocking arm to make periodic motion; the driving chain is used for connecting gears on the first crankshaft and the second crankshaft; the gear ratio of the gear for the first crankshaft to the gear for the second crankshaft is 1:2; and the phase regulator is used for regulating the rotary phase relation between the first crankshaft and the second crankshaft. Through the double-crankshaft-contained variable-compression-ratio Atkinson-cycle internal-combustion engine mechanism, the fuel efficiency of a naturally-aspirated internal-combustion engine can be effectively improved, and meanwhile, the double-crankshaft-contained variable-compression-ratio Atkinson-cycle internal-combustion engine mechanism has the actions of additionally regulating the compression ratio and changing the discharging quantity within a small range.

Description

technical field [0001] The invention relates to a variable compression ratio Atkinson cycle internal combustion engine mechanism with double crankshafts, which is an internal combustion engine technology for improving the availability of the Atkinson cycle internal combustion engine and improving the thermal efficiency of the internal combustion engine to make it very close to the theory of the Carnot cycle Maximum efficiency. In an internal combustion engine mechanism with two crankshafts, one crankshaft rotates twice as fast as the other crankshaft. The compression ratio of the internal combustion engine can be adjusted by adjusting the phase relationship of the two crankshafts. The mechanism can effectively improve the fuel efficiency of the naturally aspirated internal combustion engine, and make the pressure in the cylinder closer to the atmospheric pressure when the cylinder exhaust stroke starts. Background technique [0002] The Atkinson cycle is a high-efficiency ...

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Problems solved by technology

But this method must be equipped with a variable compression ratio mechanism for each cylinder, which is very complicated

Another example is that the publication number CN101375043A is used to control the electromechanical device of a variable compression ratio engine. The piston and the brake piston are connected to the sprocket through a rack. The manufacturing cost is too high and the manufacturing process is too complicated.

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