Free-piston engine

Abstract

The invention relates to a free-piston engine, which comprises a hydraulic pump body assembly, a first air cylinder, a second air cylinder, a push rod hole, a first pull rod hole, a first crossed connection passage, a first inner piston, a second inner piston, a push rod, an inner plunger, a first outer piston, a second outer piston and a first outer plunger, wherein the first air cylinder and the second air cylinder are arranged on two sides of the hydraulic pump body assembly; the first crossed connection passage is arranged between the first push rod hole and the first pull rod hole; the first inner piston is arranged in the first air cylinder; the second inner piston is arranged in the second air cylinder; two ends of the push rod are respectively fixed on the first inner piston and the second inner piston; the inner plunger is installed between the push rod and the push rod hole, an inner pump chamber and an inner coupling pump chamber are respectively formed on two ends of the push rod hole, and an inner coupling pump chamber is communicated with the first crossed connection passage; the top end of the first outer piston is close to the first inner piston; the top end of the second outer piston faces towards the second inner piston; two ends of the first pull rod are arranged on the first outer piston and the second outer piston; and the first outer plunger is arranged between a first pull rod and the first pull rod hole, the first outer plunger forms a first outer pump chamber and a first outer coupling pump chamber with two ends of the first pull rod hole, and the first outer coupling pump chamber is communicated with the first crossed passage.

Description

technical field [0001] The invention relates to the field of engine manufacturing, in particular to a free-piston engine. Background technique [0002] Generally speaking, internal combustion engines operate by the fixed mechanical motion of pistons. For example, a conventional automotive internal combustion engine includes a crankshaft and multiple connecting rod components, which determine the mechanical movement of each piston in each cylinder. At a given moment, the position of each piston in the working cycle is determined. And simplifies the timing and operation of the engine. [0003] Due to the nature of the engine, the existing internal combustion engine still has great limitations in improving the efficiency, especially the specific power is limited, because the mechanical movement of the piston is fixed, which determines the fixed compression ratio. In addition, all the moving parts that drive the pistons (also camshafts, valves, etc.) create a lot of friction t...

AI Technical Summary

Problems solved by technology

[0009] In view of the above-mentioned problems existing in the existing engine, a free-piston engine is now provided. The free-piston engine can ensure balance, and can solve the problem that the piston components cannot be positioned accurately in the prior art and ensure that the piston components do not shift.

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