Free piston internal combustion engine generator capable of automatically switching states

Abstract

The invention provides a free piston internal combustion engine generator capable of automatically switching states, which comprises a free piston engine, a linear generator, a spring return mechanism, a direct current power supply starting system, an electromagnetic load system and an induction signal triggering and receiving system, a valve air inlet mechanism, a valve exhaust mechanism and an ignition system are arranged on a cylinder cover at the end of the air cylinder, and the linear generator comprises a linear motor stator and a linear motor rotor. A signal trigger arranged in a piston triggers an inductive switch to work at different signal receiving points, automatic switching of three states of system cold start, dragging combustion and stable power generation is completed along with increase of the amplitude of reciprocating motion of a linear motor mover, meanwhile, early warning trigger signals are set at the signal receiving points closest to a cylinder cover and farthest from the cylinder cover, and the early warning trigger signals are sent to the linear motor mover. Firing and cylinder collision early warning of the free piston internal combustion engine generator system is achieved, and stable operation of the system is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of energy and power technology, in particular to a free piston internal combustion generator with automatically switchable states. Background Art

[0002] The free piston internal combustion engine and the linear motor are directly coupled to form a free piston linear internal combustion power generation system. The system has a simple and compact structure and is regarded as a new energy conversion system that can replace traditional internal combustion engines in the future. During the operation of the system, the moving parts perform linear reciprocating motion, and the linear motor mover and stator move against each other to generate electrical energy.

[0003] There are three main working states in the working process of the free piston internal combustion power generation system, namely cold start state, drag combustion state, and stable power generation state. The existing prototype mainly realizes state switching by manual means, which is highly random. Therefore, the system often shuts down during state switching, which greatly affects the system's working stability. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a free-piston internal combustion generator with automatically switchable states. By using signal triggering and receiving sensors to control corresponding induction switches, the free-piston internal combustion generator can automatically switch between cold start state, drag combustion state, and stable power generation state without a built-in displacement sensor, and has cylinder collision and misfire warning capabilities, which is of great significance for the promotion and application of free-piston internal combustion power generation systems.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a free piston internal combustion generator with automatically switchable states, characterized in that it includes a free piston engine, a linear generator, a spring return mechanism, a DC power supply starting system, an electromagnetic load system, and an induction signal trigger receiving system. The free piston engine includes 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 includes a linear motor stator and a linear motor mover. The piston is connected to the spring return mechanism through a connecting rod. The linear motor mover is fixed on the connecting rod. The DC power supply starting system and the electromagnetic load system are electrically connected to the linear motor stator. The induction signal trigger receiving system includes a signal trigger, a signal receiver 1, a signal receiver 2, a signal receiver 3, and a signal receiver 4. The signal trigger is arranged in the piston. The signal receivers 1, 2, 3, and 4 are arranged on the cylinder wall and are arranged in sequence along the cylinder head direction.

[0008] Preferably, the DC power supply starting system includes a DC power supply, a starting harness 1, an induction switch 1, and a starting harness 2 which are connected in sequence, and the starting harness 2 is connected to the stator of the linear motor. When the system is in a cold start state, the DC power supply provides electrical energy to the stator of the linear motor, at which time the piston starts to move, and the signal receiver 1 first receives the trigger signal of the signal trigger. In the cold start state, no fire warning is issued.

[0009] Preferably, the ignition system includes a low-voltage DC power supply, an ignition harness 1, an induction switch 3, an ignition harness 2, and a spark plug connected in sequence. The spark plug is arranged on the cylinder head. When the piston continues to move, the signal receiver 2 receives a trigger signal from the signal trigger, and the spark plug is triggered to work through the induction switch 3.

[0010] Preferably, the electromagnetic load system includes an electromagnetic load, a load harness 2, an induction switch 2, and a load harness 1 connected in sequence, wherein the load harness 1 is connected to the stator of the linear motor; when the piston continues to move so that the signal receiver 3 receives a trigger signal from the signal trigger, the induction switch 1 is triggered to cut off the connection between the start harness 1 and the start harness 2; at the same time, the induction switch 2 is triggered to connect the connection between the load harness 1 and the load harness 2, and the system state is switched to a stable power generation state.

[0011] Preferably, when the piston moves excessively due to abnormal fuel or load, the signal receiver 4 receives a trigger signal from the signal trigger and issues a cylinder collision warning.

[0012] Preferably, when the piston moves excessively due to abnormal fuel or load, the signal receiver receives the trigger signal of the signal trigger again and issues a misfire warning.

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

[0014] (III) Beneficial effects

[0015] The present invention provides a free piston internal combustion generator with automatically switchable states. It has the following beneficial effects:

[0016] 1. The state of the free piston internal combustion generator can be automatically switched. The signal trigger placed in the piston triggers the induction switch to work at different signal receiving points. As the amplitude of the reciprocating motion of the linear motor rotor increases, the system completes the automatic switching of the three states of cold start, drag combustion and stable power generation. At the same time, the signal receiving points closest to the cylinder head and farthest from the cylinder head are set with early warning trigger signals to realize the free piston internal combustion generator system fire and cylinder collision early warning, ensuring the stable operation of the system. The present invention realizes the automatic switching of the three states of cold start, drag combustion and stable power generation of the free piston internal combustion power generation system, which can improve the system's stable operation capability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] In the figure: 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 air ring, 13 second combustion cylinder air 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 DESCRIPTION

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

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

[0021] The free piston engine includes a cylinder 11 and a piston 27 that reciprocates in the cylinder 11. A valve intake mechanism 15, a valve exhaust mechanism 21, and an ignition system are provided on the cylinder head 14 at the end of the cylinder 11. The valve intake mechanism 15 and the valve exhaust mechanism 21 are electromagnetic valves that complete the intake and exhaust processes according to the set valve timing.

[0022] The piston 27 is connected to the spring return mechanism through the connecting rod 10. The spring return mechanism includes a return spring 2, a return cylinder 1, and a return connection 3. The return spring 2 is arranged in the return cylinder 1. The return spring 2 and the connecting rod 10 are fixedly connected through the return connection 3. The motion assembly composed of the piston 27, the connecting rod 10, the linear motor mover 9, the return spring 2 and the return connection 3 is the motion part when the system is running, and performs reciprocating linear motion when the system is running.

[0023] The induction signal trigger receiving system includes a signal trigger 26, a signal receiver 1 25, a signal receiver 2 24, a signal receiver 3 23, and a signal receiver 4 22. The signal trigger 26 is arranged in the piston 27, and the signal receiver 1 25, the signal receiver 2 24, the signal receiver 3 23, and the signal receiver 4 22 are arranged on the wall of the cylinder 11 and are arranged in sequence along the direction of the cylinder cover 14. When the end of the piston 27 contacts the cylinder cover 14, the signal receiver 4 22 receives the trigger signal of the signal trigger 26.

[0024] The linear generator comprises a linear motor stator 8 and a linear motor mover 9. The linear motor mover 9 is fixed on a connecting rod 10, and the linear motor stator 8 is sleeved outside the linear motor mover 9. The DC power supply starting system and the electromagnetic load system are electrically connected to the linear motor stator 8.

[0025] The DC power supply starting system includes a DC power supply 4, a starting harness 1 5, an induction switch 1 6, and a starting harness 2 7 which are connected in sequence. The starting harness 2 7 is connected to the linear motor stator 8. When the system is in a cold start state, the DC power supply 4 provides power to the linear motor stator 8. At this time, the piston 27 starts to move, and the signal receiver 1 25 first receives the trigger signal of the signal trigger 26. In the cold start state, no fire warning is issued.

[0026] The electromagnetic load system includes an electromagnetic load 31 , a load harness 2 30 , an inductive switch 29 , and a load harness 1 28 which are connected in sequence. The load harness 1 28 is connected to the stator 8 of the linear motor.

[0027] The ignition system includes a low-voltage DC power supply 20, an ignition harness 1 19, an induction switch 3 17, an ignition harness 2 18, and a spark plug 16 which are connected in sequence. The spark plug 16 is arranged on the cylinder head 14.

[0028] When the system is in the cold start state, the DC power supply 4 is connected to the linear motor stator 8 through the starting harness 1 5 and the starting harness 1 7 to provide electrical energy for the reciprocating motion of the system's moving components. The amplitude of the reciprocating motion of the moving components gradually increases with the accumulation of energy supply. In the cold start state, the induction switch 1 6 is in the on state, the starting harness 1 5 and the starting harness 2 7 are connected; the induction switch 2 17 is in the off state, the ignition harness 1 19 and the ignition harness 2 18 are in the disconnected state; the induction switch 3 29 is in the off state, and the load harness 1 28 and the load harness 2 30 are in the disconnected state.

[0029] Embodiment 2, the system switches from the cold start state to the drag combustion state. When the amplitude of the reciprocating motion of the motion component gradually increases with the accumulation of energy supply, the signal receiver 2 24 receives the trigger signal of the signal trigger 26, at which time the induction switch 3 between the ignition harness 1 19 and the ignition harness 2 18 starts to work, the spark plug 16 starts to trigger normally, and the system state switches to the drag combustion state; at this time, the induction switch 1 6 is in the open state, the start harness 1 5 and the start harness 2 7 are connected; the induction switch 3 29 is in the closed state, and the load harness 1 28 and the load harness 2 30 are in the disconnected state.

[0030] Embodiment 3, when the amplitude of the reciprocating motion of the moving component gradually increases with the accumulation of energy supply, the signal receiver three 23 receives the trigger signal of the signal trigger 26, and the induction switch one 6 between the starting harness one 5 and the starting harness two 7 is disconnected, cutting off the connection between the starting harness one 5 and the starting harness two 7; at the same time, the induction switch two 29 between the load harness one 28 and the load harness two 30 starts to work, connecting the connection between the load harness one 28 and the load harness two 30, and the system state switches to a stable power generation state; at this time, the induction switch two 17 is in the on state, and the ignition harness one 19 and the ignition harness two 18 are in the connected state.

[0031] Example 4: When the piston 27 moves excessively due to abnormal fuel or load, the signal receiver 22 receives the trigger signal of the signal trigger 26 and issues a cylinder collision warning.

[0032] In Example 5, when the piston 27 moves excessively due to abnormal fuel or load, the signal receiver 1 (25) receives the trigger signal from the signal trigger (26) again and issues a misfire warning.

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

Claims

1. A free piston internal combustion generator with automatically switchable state, characterized in that: The invention comprises a free piston engine, a linear generator, a spring return mechanism, a DC power supply starting system, an electromagnetic load system, and an induction signal trigger receiving system. The free piston engine comprises a cylinder (11) and a piston (27) reciprocating in the cylinder (11). A valve intake mechanism (15), a valve exhaust mechanism (21), and an ignition system are arranged on a cylinder head (14) at the end of the cylinder (11). The linear generator comprises a linear motor stator (8) and a linear motor mover (9). The piston (27) is connected to the spring return mechanism via a connecting rod (10). The linear motor mover (9) is fixed on the cylinder head (14). On the connecting rod (10), the DC power supply starting system, the electromagnetic load system and the linear motor stator (8) are electrically connected, and the induction signal trigger receiving system includes 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), and 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 are arranged in sequence along the direction of the cylinder cover (14).

2. A free piston internal combustion generator with automatically switchable states according to claim 1, characterized in that: The DC power supply starting system comprises a DC power supply (4), a starting harness 1 (5), an induction switch 1 (6), and a starting harness 2 (7) which are connected in sequence. The starting harness 2 (7) is connected to a linear motor stator (8). When the system is in a cold start state, the DC power supply (4) provides electric energy to the linear motor stator (8). At this time, the piston (27) starts to move. The signal receiver 1 (25) first receives a trigger signal from a signal trigger (26). In the cold start state, no fire warning is issued.

3. A free piston internal combustion generator with automatically switchable states according to claim 2, characterized in that: The ignition system comprises a low-voltage direct current power supply (20), an ignition harness 1 (19), a sensor switch 3 (17), an ignition harness 2 (18), and a spark plug (16) which are connected in sequence. The spark plug (16) is arranged on the cylinder head (14). When the piston (27) continues to move, the signal receiver 2 (24) receives a trigger signal from the signal trigger (26), and the spark plug (16) is triggered to work through the sensor switch 3 (17).

4. A free piston internal combustion generator with automatically switchable states according to claim 3, characterized in that: The electromagnetic load system comprises an electromagnetic load (31), a load harness 2 (30), an inductive switch 2 (29), and a load harness 1 (28) which are connected in sequence, wherein the load harness 1 (28) is connected to the stator (8) of the linear motor; when the piston (27) continues to move so that the signal receiver 3 (23) receives a trigger signal from the signal trigger (26), the inductive switch 1 (6) triggers to cut off the connection between the start harness 1 (5) and the start harness 2 (7); at the same time, the inductive switch 2 (29) triggers to connect the connection between the load harness 1 (28) and the load harness 2 (30), and the system state switches to a stable power generation state.

5. A free piston internal combustion generator with automatically switchable states according to claim 4, characterized in that: When the piston (27) moves excessively due to abnormal fuel or load, the signal receiver (22) receives the trigger signal from the signal trigger (26) and issues a cylinder collision warning.

6. A free piston internal combustion generator with automatically switchable states according to claim 5, characterized in that: When the piston (27) moves excessively due to abnormal fuel or load, the signal receiver (25) receives the trigger signal from the signal trigger (26) again and issues a misfire warning.

7. A free piston internal combustion generator with automatically 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) and the connecting rod (10) are fixedly connected via the return connecting piece (3).

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