Four-stroke reciprocating piston internal combustion engine

Abstract

The invention discloses a four-stroke reciprocating piston internal combustion engine which comprises a piston, a connecting rod and a bent shaft. The piston is connected onto a connecting rod shaft neck of the bent shaft, an eccentric shaft is sleeved on the connecting rod shaft neck, a connecting rod big end of the connecting rod is sleeved on the eccentric shaft, a driving mechanism capable of driving the eccentric shaft to self rotate is further arranged on the eccentric shaft, and the eccentric shaft rotates for one ring when the bent shaft rotates for two rings each time. Compared with the prior art, a piston stroke of the internal combustion engine in suction and exhaust strokes is larger than that in working and compression strokes, exhaust gas can be discharged out of the cylinder to the greatest extend, temperature in the cylinder can be reduced, more fresh low-temperature air can be sucked in a next suction stroke, burning is sufficient, and power of the internal combustion engine is promoted. Compared with the existing Atkinson circulation internal combustion engine, the internal combustion engine overcomes the shortcoming that a multiple-rod mechanism of the internal combustion engine is complex, high in failure rate and poor in low velocity torsion, and the internal combustion engine has power exceeding Otto cycle.

Description

technical field [0001] The invention relates to a four-stroke reciprocating piston internal combustion engine. Background technique [0002] The main structure of present known internal combustion engine is made of cylinder, piston, connecting rod, crankshaft and intake and exhaust valves, spark plug, fuel injector etc. that are positioned at cylinder head. The space between the top dead center of the piston and the cylinder head is the combustion chamber, and the four-stroke cycle of intake, compression, work and exhaust is completed through the rotation of the crankshaft. [0003] The existing problems of the current internal combustion engine are: 1. Otto cycle internal combustion engine, due to the fixed piston stroke, at the end of the exhaust stroke, the high temperature and high pressure exhaust gas equivalent to the volume of the combustion chamber still remains in the cylinder, and the exhaust gas discharge is not complete, which hinders the next suction process. T...

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Problems solved by technology

[0003] The existing problems of the current internal combustion engine are: 1. Otto cycle internal combustion engine, due to the fixed piston stroke, at the end of the exhaust stroke, the high temperature and high pressure exhaust gas equivalent to the volume of the combustion chamber still remains in the cylinder, and the exhaust gas discharge is not complete, which hinders the next suction process. The air intake volume of the air stroke limits the power boost and compression ratio of the internal combustion engine; 2. Due to the complexity of the multi-link mechanism, the Atkinson cycle internal combustion engine has its shortcomings such as high failure rate, unreliable performance, and poor low-speed torque, which limit its application range

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