Ignition protection module, system and method of free-piston type internal-combustion engine

Abstract

A free piston type combustion engine ignition system, a method and a protective module belong to the combustion engine technical field. The system comprises an input signal sensor, an ignition actuator and an electronic control unit, wherein the input signal sensor comprises a Hall sensor and a linear displacement transducer; the linear displacement transducer is in electrical connection with the Hall sensor and is triggered by the Hall sensor; the Hall sensor is arranged on the moving line of the connecting rod of a free piston type combustion engine. When the connecting rod passes, the Hall sensor triggers the linear displacement transducer to carry out induction of the displacement of the connecting rod; when the displacement reaches to a preset value, the electronic control unit controls the ignition actuator to carry out ignition; moreover, the connecting rod undergoes braking and backward movement by means of thermodynamics principle, and the process is repeated. The free piston type combustion engine ignition system can realize realtime judgment of the position of the connecting rod so as to accurately control ignition time; meanwhile, ignition parameter can be flexibly adjusted according to operating condition so as to ensure that the free piston type combustion engine operates under an optimum condition.

Description

technical field [0001] The invention relates to an ignition protection module, system and method in the technical field of internal combustion engines, in particular to an ignition protection module, system and method for a free-piston internal combustion engine. Background technique [0002] The free-piston internal-combustion engine refers to a special internal-combustion engine in which the engine has canceled the usual crank-connecting rod mechanism and the piston movement is not subject to physical constraints. Its structure generally includes two coaxial cylinders with opposite openings, and two ends of a movable connecting rod are respectively placed in the cylinders, and reciprocate along the axial direction. Because it is not bound by mechanical rods, its power piston is free, that is, the compression ratio is variable. Compared with the traditional crankshaft engine, it omits the crank connecting rod mechanism that converts the reciprocating motion of the piston i...

AI Technical Summary

Problems solved by technology

However, it cannot flexibly adjust the ignition position when the working conditions change. Inappropriate ignition timing under certain working conditions will deteriorate the performance of the engine and deteriorate the economy and power. It is difficult to take advantage of the variable compression ratio of the free-piston internal combustion engine.

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