A free piston internal combustion generator with automatic state switching

Abstract

The application provides a free piston internal combustion generator with automatic state switching, comprising a free piston engine, a linear generator, a spring return mechanism, a direct current power source starting system, an electromagnetic load system, an induction signal trigger receiving system, the free piston engine comprising a cylinder and a piston reciprocating in the cylinder, a cylinder head at the end of the cylinder being provided with a valve air intake mechanism, a valve air exhaust mechanism and an ignition system, the linear generator comprising a linear motor stator and a linear motor rotor. A signal trigger placed in the piston triggers an induction switch to work at different signal receiving points, with the amplitude of reciprocating motion of the linear motor rotor increasing, the automatic switching of three states of system cold start, drag combustion and stable power generation being completed, and at the same time, a pre-warning trigger signal is arranged at the signal receiving point closest to the cylinder head and the signal receiving point farthest from the cylinder head, the pre-warning of misfire and cylinder collision of the free piston internal combustion generator system is realized, and the stable operation of the system is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy power technology, in particular to a free piston internal combustion generator with automatic state switching. BACKGROUND

[0002] The free piston internal combustion engine is directly coupled with the linear motor to form a free piston linear internal combustion power generation system, which is simple in structure and compact in structure and is regarded as a new energy conversion system to replace the traditional internal combustion engine in the future. During the operation of the system, the moving parts move linearly, and the moving part and the stator of the linear motor move relative to each other to generate electric energy.

[0003] There are mainly three working states during the working process of the free piston internal combustion power generation system, which are cold start state, drag combustion state and stable power generation state. The existing prototype mainly realizes state switching through manual mode, which has great randomness, so that the system often stops during state switching, which greatly affects the stability of the system. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the shortcomings of the prior art, the present application provides a free piston internal combustion generator with automatic state switching, which uses signal trigger and receiving sensors to control corresponding inductive switches. Without built-in displacement sensors, the free piston internal combustion generator can realize automatic switching of cold start state, drag combustion state and stable power generation state, and has the functions of cylinder collision and misfire warning. It is of great significance for the popularization and application of the free piston internal combustion power generation system.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the present application is realized by the following technical scheme: a free piston internal combustion generator with automatic state switching, characterized by comprising a free piston engine, a linear generator, a spring return mechanism, a direct current power starting system, an electromagnetic load system and an inductive signal trigger and receiving system. The free piston engine comprises a cylinder and a piston reciprocating in the cylinder. The cylinder head at the end of the cylinder is provided with a valve intake mechanism, a valve exhaust mechanism and an ignition system. The linear generator comprises a linear motor stator and a linear motor mover. The piston is connected to the spring return mechanism through a connecting rod, and the linear motor mover is fixed on the connecting rod. The direct current power starting system, the electromagnetic load system and the linear motor stator are electrically connected. The inductive signal trigger and receiving system comprises a signal trigger, a signal receiver one, a signal receiver two, a signal receiver three and a signal receiver four. The signal trigger is arranged in the piston, and the signal receiver one, the signal receiver two, the signal receiver three and the signal receiver four are arranged on the cylinder wall and arranged in sequence along the direction of the cylinder head.

[0008] Preferably, the direct current power starting system comprises a direct current power source, a starting wire harness one, an induction switch one, a starting wire harness two connected in sequence, the starting wire harness two connects the linear motor stator, when the system is in a cold starting state, the direct current power source provides power for the linear motor stator, at this time, the piston starts to move, the signal receiver one first receives the trigger signal of the signal trigger, in the cold starting state, no misfire warning is given.

[0009] Preferably, the ignition system comprises a low-voltage direct current power source, an ignition wire harness one, an induction switch three, an ignition wire harness two, a spark plug connected in sequence, the spark plug is arranged on the cylinder head, when the piston continues to move and the signal receiver two receives the trigger signal of the signal trigger, the spark plug is triggered to work through the induction switch three.

[0010] Preferably, the electromagnetic load system comprises an electromagnetic load, a load wire harness two, an induction switch two, a load wire harness one connected in sequence, the load wire harness one connects the linear motor stator; when the piston continues to move and the signal receiver three receives the trigger signal of the signal trigger, the induction switch one triggers to cut off the connection between the starting wire harness one and the starting wire harness two; at the same time, the induction switch two triggers to turn on the connection between the load wire harness one and the load wire harness two, the system state is switched to a stable power generation state.

[0011] Preferably, when the piston excessively moves due to fuel abnormality or load abnormality, the signal receiver four receives the trigger signal of the signal trigger, a cylinder collision warning is given.

[0012] Preferably, when the piston excessively moves due to fuel abnormality or load abnormality, the signal receiver one receives the trigger signal of the signal trigger again, a misfire warning is given.

[0013] Preferably, the spring return mechanism comprises a return spring, a return cylinder, a return connecting piece, the return spring is arranged in the return cylinder, and the return spring is fixedly connected with the connecting rod through the return connecting piece.

[0014] (Three) beneficial effects

[0015] The application provides a free piston internal combustion generator with automatic state switching.

[0016] 1. This free-piston internal combustion generator features an automatically switchable state. A signal trigger located within the piston activates an inductive switch at different signal receiving points. As the amplitude of the linear motor's reciprocating motion increases, the system automatically switches between three states: cold start, traction combustion, and stable power generation. Simultaneously, warning trigger signals are set at the signal receiving points closest to and furthest from the cylinder head to provide early warnings of misfires and cylinder knocking in the free-piston internal combustion generator system, ensuring stable system operation. This invention enables automatic switching between the three states of cold start, traction combustion, and stable power generation in a free-piston internal combustion generator system, thereby improving the system's stable operation capability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] In the diagram: 1 Return cylinder, 2 Return spring, 3 Return connector, 4 DC power supply, 5 Starting harness 1, 6 Induction switch 1, 7 Starting harness 2, 8 Linear motor stator, 9 Linear motor mover, 10 Connecting rod, 11 Cylinder, 12 First combustion cylinder ring, 13 Second combustion cylinder ring, 14 Cylinder head, 15 Valve intake mechanism, 16 Spark plug, 17 Induction switch 3, 18 Ignition harness 2, 19 Ignition harness 1, 20 Low-voltage DC power supply, 21 Valve exhaust mechanism, 22 Signal receiver 4, 23 Signal receiver 3, 24 Signal receiver 2, 25 Signal receiver 1, 26 Signal trigger, 27 Piston, 28 Load harness 1, 29 Induction switch 2, 30 Load harness 2, 31 Electromagnetic load. Detailed Implementation

[0019] This invention provides a free piston internal combustion generator with automatically switchable states.

[0020] Example 1, as Figure 1 As shown, it includes a free piston engine, a linear generator, a spring return mechanism, a DC power starting system, an electromagnetic load system, and an induction signal triggering and receiving system.

[0021] The free piston engine includes a cylinder 11 and a piston 27 that reciprocates within the cylinder 11. The cylinder head 14 at the end of the cylinder 11 is equipped with an intake valve mechanism 15, an exhaust valve mechanism 21, and an ignition system. The intake valve mechanism 15 and the exhaust valve mechanism 21 are electromagnetic valves, which complete the intake and exhaust processes according to the preset valve timing.

[0022] Piston 27 is connected with spring return mechanism through connecting rod 10, the spring return mechanism includes return spring 2, return cylinder 1, return connecting piece 3, return spring 2 is arranged in return cylinder 1, and return spring 2 is fixedly connected with connecting rod 10 through return connecting piece 3.The motion assembly formed by piston 27, connecting rod 10, linear motor mover 9, return spring 2 and return connecting piece 3 is the motion part when the system runs, and reciprocating linear motion is done when the system runs.

[0023] Induction signal trigger receiving system includes signal trigger 26, signal receiver one 25, signal receiver two 24, signal receiver three 23, signal receiver four 22, signal trigger 26 is arranged in piston 27, signal receiver one 25, signal receiver two 24, signal receiver three 23, signal receiver four 22 are arranged on the wall of cylinder 11, and are sequentially arranged along the direction of cylinder cover 14.When the end of piston 27 contacts cylinder cover 14, signal receiver four 22 receives the trigger signal of signal trigger 26.

[0024] Linear generator includes linear motor stator 8 and linear motor mover 9, linear motor mover 9 is fixed on connecting rod 10, and linear motor stator 8 is sleeved outside linear motor mover 9.Direct current power starting system and electromagnetic load system are electrically connected with linear motor stator 8.

[0025] Direct current power starting system includes direct current power 4, starting wire harness one 5, induction switch one 6 and starting wire harness two 7 connected in sequence, starting wire harness two 7 is connected with linear motor stator 8, when the system is in cold start state, direct current power 4 provides power for linear motor stator 8, at this time, piston 27 starts to move, and signal receiver one 25 first receives the trigger signal of signal trigger 26, and in the cold start state, no misfire warning is sent.

[0026] Electromagnetic load system includes electromagnetic load 31, load wire harness two 30, induction switch two 29 and load wire harness one 28 connected in sequence, and load wire harness one 28 is connected with linear motor stator 8.

[0027] Ignition system includes low-voltage direct current power 20, ignition wire harness one 19, induction switch three 17, ignition wire harness two 18 and spark plug 16 connected in sequence, and spark plug 16 is arranged on cylinder cover 14.

[0028] When the system is in cold start state, the DC power supply 4 connects the linear motor stator 8 through the starting wire bundle 1 5 and the starting wire bundle 2 7 to provide power for the reciprocating motion of the motion assembly, and the amplitude of the reciprocating motion of the motion assembly gradually increases with the accumulation of power supply. In the cold start state, the induction switch 1 6 is in the open state, and the starting wire bundle 1 5 and the starting wire bundle 2 7 are in communication; the induction switch 2 17 is in the closed state, and the ignition wire bundle 1 19 and the ignition wire bundle 2 18 are in the open state; the induction switch 3 29 is in the closed state, and the load wire bundle 1 28 and the load wire bundle 2 30 are in the open state.

[0029] In example 2, the system is switched from the cold start state to the drag combustion state. When the amplitude of the reciprocating motion of the motion assembly gradually increases with the accumulation of power supply, the signal receiver 2 4 receives the trigger signal of the signal trigger 2 6, at this time the induction switch 3 between the ignition wire bundle 1 19 and the ignition wire bundle 2 18 starts to work, and the spark plug 1 6 starts to normally trigger, and the system state is switched to the drag combustion state; At this time, the induction switch 1 6 is in the open state, and the starting wire bundle 1 5 and the starting wire bundle 2 7 are in communication; the induction switch 3 29 is in the closed state, and the load wire bundle 1 28 and the load wire bundle 2 30 are in the open state.

[0030] In example 3, when the amplitude of the reciprocating motion of the motion assembly gradually increases with the accumulation of power supply, the signal receiver 3 23 receives the trigger signal of the signal trigger 2 6, the induction switch 1 6 between the starting wire bundle 1 5 and the starting wire bundle 2 7 is disconnected, cutting off the connection between the starting wire bundle 1 5 and the starting wire bundle 2 7; At the same time, the induction switch 2 29 between the load wire bundle 1 28 and the load wire bundle 2 30 starts to work, connecting the connection between the load wire bundle 1 28 and the load wire bundle 2 30, and the system state is switched to the stable power generation state; At this time, the induction switch 2 17 is in the open state, and the ignition wire bundle 1 19 and the ignition wire bundle 2 18 are in the open state.

[0031] In example 4, when the piston 2 7 moves excessively due to abnormal fuel or abnormal load, the signal receiver 4 22 receives the trigger signal of the signal trigger 2 6, and sends a pre-warning of piston collision.

[0032] In example 5, when the piston 2 7 moves excessively due to abnormal fuel or abnormal load, the signal receiver 1 25 receives the trigger signal of the signal trigger 2 6 again, and sends a pre-warning of misfire.

[0033] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A free piston internal combustion generator with automatic switchable states, characterized by: The application relates to a free piston engine, a linear generator, a spring return mechanism, a direct current power starting system, an electromagnetic load system, an inductive signal trigger receiving system, the free piston engine comprising a cylinder (11) and a piston (27) reciprocating in the cylinder (11), a cylinder cover (14) arranged at the end of the cylinder (11) is provided with an air inlet valve mechanism (15), an air outlet valve mechanism (21) and an ignition system, the linear generator comprises a linear motor stator (8) and a linear motor rotor (9), the piston (27) is connected with the spring return mechanism through a connecting rod (10), the linear motor rotor (9) is fixed on the connecting rod (10), the direct current power starting system and the electromagnetic load system are electrically connected with the linear motor stator (8), the inductive signal trigger receiving system comprises a signal trigger (26), a signal receiver one (25), a signal receiver two (24), a signal receiver three (23) and a signal receiver four (22), the signal trigger (26) is arranged in the piston (27), the signal receiver one (25), the signal receiver two (24), the signal receiver three (23) and the signal receiver four (22) are arranged on the wall of the cylinder (11) and sequentially arranged along the direction of the cylinder cover (14); the direct current power starting system comprises a direct current power source (4), a starting wire harness one (5), an inductive switch one (6) and a starting wire harness two (7) which are sequentially connected, the starting wire harness two (7) is connected with the linear motor stator (8), when the system is in a cold starting state, the direct current power source (4) provides electric energy for the linear motor stator (8), at this time, the piston (27) starts to move, the signal receiver one (25) firstly receives the trigger signal of the signal trigger (26), and no misfire early warning is given in the cold starting state; the ignition system comprises a low-voltage direct current power source (20), an ignition wire harness one (19), an inductive switch three (17), an ignition wire harness two (18) and a spark plug (16) which are sequentially connected, the spark plug (16) is arranged on the cylinder cover (14), when the piston (27) continuously moves to make the signal receiver two (24) receive the trigger signal of the signal trigger (26), the inductive switch three (17) triggers the spark plug (16) to work; the electromagnetic load system comprises an electromagnetic load (31), a load wire harness two (30), an inductive switch two (29) and a load wire harness one (28) which are sequentially connected, the load wire harness one (28) is connected with the linear motor stator (8); when the piston (27) continuously moves to make the signal receiver three (23) receive the trigger signal of the signal trigger (26), the inductive switch one (6) triggers to cut off the connection between the starting wire harness one (5) and the starting wire harness two (7); meanwhile, the inductive switch two (29) triggers to connect the load wire harness one (28) and the load wire harness two (30), and the system state is switched to a stable power generation state; when the piston (27) excessively moves due to abnormal fuel or abnormal load, the signal receiver four (22) receives the trigger signal of the signal trigger (26), and a cylinder collision early warning is given.When the piston (27) over-movement is caused by fuel abnormality or load abnormality, the signal receiver (25) receives the trigger signal of the signal trigger (26) again, and sends out misfire warning.

2. A free piston internal combustion generator with automatic switchable states according to claim 1, characterized in that: The spring return mechanism comprises a return spring (2), a return cylinder (1), and a return connecting piece (3), the return spring (2) is arranged in the return cylinder (1), and the return spring (2) is fixedly connected with the connecting rod (10) through the return connecting piece (3).

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