An electronic speed regulation structure in a single-cylinder air-cooled diesel generator

Abstract

This invention provides an electronic speed control structure for a single-cylinder air-cooled diesel generator, belonging to the technical field of fuel generators. It solves the technical problem of inaccurate control of engine fuel supply in existing fuel generators. The single-cylinder air-cooled diesel generator includes a magneto and an engine. The engine includes a housing and a fuel supply assembly mounted on the housing. The engine's output shaft is connected to the magneto's rotor. This electronic speed control structure includes a drive motor and a shift fork. The shift fork is connected to the throttle in the fuel supply assembly and can control the throttle's opening and closing angle. The drive motor's output shaft is connected to the shift fork and can drive the shift fork to swing back and forth. This electronic speed control structure also includes a central processing unit and a speed acquisition unit for calculating the magneto's rotational speed. The electronic speed control structure of this invention can accurately and reliably control the fuel supply and rotational speed of the fuel engine.

Description

Technical Field

[0001] The invention belongs to the technical field of generator equipment and relates to an electronic speed regulating structure in a single-cylinder air-cooled diesel generator. Background Art

[0002] A generator is a mechanical device that converts mechanical energy into electrical energy. In the prior art, a fuel generator is a relatively common type of generator. It generates power through a fuel engine, converts chemical energy into kinetic energy, and then enables the generator set to generate electrical energy. Fuels such as gasoline and diesel are widely used in various fuel generators. The disadvantage of the existing fuel generator device is that the rated power output by the engine, regardless of whether the motor is loaded or not, the engine runs at high speed and cannot change according to the change of the motor load power. The generator always maintains high-power fuel consumption, resulting in a waste of resources. Therefore, it is necessary to adjust the power of the fuel engine according to the change of the motor load power. The traditional engine speed regulating mechanism on the market is a mechanical fork speed regulation. The working principle of the traditional single-cylinder air-cooled diesel engine governor is: when the diesel engine is running, when the speed increases, the fly hammer automatically opens due to the centrifugal force of the operation, and drives the speed regulating push plate. The speed regulating push plate generates an axial force, moves outward, and presses the lower end of the speed regulating fork lever. The speed regulating fork rotates, and the opening of the speed regulating fork drives the injection pump to reduce the amount of oil to control the speed. When the speed slows down, on the contrary, the flying hammer is automatically closed due to the centrifugal force of the operation, and the spring on the speed control shaft is restored. According to the above procedure, the oil volume is increased to increase the speed and achieve the purpose of speed regulation. This structural control is not intelligent, accurate and reliable enough, with a high failure rate, and is prone to problems such as flying, wandering, high idle speed, and high speed regulation.

[0003] At present, most diesel engines used for power generation use in-line plunger injection pumps for high-pressure fuel injection. Therefore, there are gradually emerging related structures that use electronic speed governors to drive injection pumps to achieve power control.

[0004] For example, a Chinese patent (Announcement No.: CN203420778U; Announcement Date: 2014-02-05) discloses an energy-saving generator set, including a generator, an engine, a base fuel tank, a fuel oil circuit, and a carburetor. The carburetor is installed on the fuel oil circuit, the engine is connected to the generator through a connector, and a fuel energy-saving device is arranged in the carburetor. The fuel energy-saving device includes an upper end cover and a lower end cover, a pair of magnets are symmetrically arranged between the upper and lower end covers, and a through hole for the fuel circuit to pass through is formed in the middle of the upper and lower end covers; an electromagnetic mutual inductor is installed at the output end of the generator, the first output end of the electromagnetic mutual inductor is connected to the negative pole of the DC power supply, the second output end of the electromagnetic mutual inductor is connected to a throttle driving solenoid valve that controls the engine throttle, and then connected to the positive pole of the DC power supply, the throttle driving solenoid valve controls the opening of the engine throttle through a transmission mechanism, and the transmission mechanism is composed of a speed regulating arm and a throttle pull rod that controls the opening of the engine throttle, the speed regulating arm is close to the magnetic core of the throttle driving solenoid valve, one end of the speed regulating arm is connected to the fuselage of the engine, and the other end of the speed regulating arm is connected to the throttle pull rod.

[0005] The generator set disclosed in the above patent document is mainly driven by a gasoline engine, and the engine power is adjusted by controlling the opening of the engine throttle through an electromagnetic valve and a transmission mechanism; however, its specific installation structure is not disclosed; similar structures generally have disadvantages such as large size, imprecise movement, and unsightly appearance. There is no related structure used in single-cylinder air-cooled small diesel generators in the prior art. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention provides an electronic speed regulation structure in a single-cylinder air-cooled diesel generator. The technical problem to be solved by the present invention is: how to improve the compactness and precision reliability of the electronic speed regulation structure in the single-cylinder air-cooled diesel generator.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] An electronic speed control structure in a single-cylinder air-cooled diesel generator, the single-cylinder air-cooled diesel generator comprising a magnetic motor and an engine, the engine being a single-cylinder air-cooled diesel engine, the engine comprising a housing and an oil supply assembly arranged on the housing; the output shaft of the engine is connected to the rotor of the magnetic motor, and is characterized in that the electronic speed control structure comprises a drive motor and a shift fork, the shift fork is connected to a throttle in the oil supply assembly and can control the opening and closing angle of the throttle; the output shaft of the drive motor is connected to the shift fork and can drive the shift fork to swing back and forth; the electronic speed control structure also comprises a central processing unit and a speed acquisition unit for measuring the speed of the output shaft of the magnetic motor.

[0009] Its working principle is as follows: This electronic speed regulation structure is particularly suitable for single-cylinder air-cooled diesel generators, such as 170, 173, 178, 186, 188, 192 and other single-cylinder air-cooled diesel generators on the current general generator market, and is mainly used to control the engine throttle; the throttle structure targeted in this technical solution is the same or similar to the traditional throttle structure, and the fly hammer and speed control push plate structure are omitted inside the engine. During use, the speed acquisition unit and the central processing unit calculate the speed of the flywheel and the magneto on the engine crankshaft. Specifically, it can be analyzed and calculated based on the frequency of the change of the magnetic signal of the winding in the magneto; the central processing unit judges the user load and working conditions based on this, thereby controlling the corresponding action of the drive motor, the drive motor forward or reverse, the drive motor drives the fork to move, the engine throttle is driven by the drive motor and the fork to open or close a certain angle, and the engine speed is controlled by controlling the oil intake to achieve idling or high-speed operation. This technical solution realizes automatic control of the engine throttle and speed through automatic detection and intelligent control, thereby improving the fuel combustion efficiency in the single-cylinder air-cooled diesel generator; during the entire working process, the electronic control system monitors the engine speed in real time and provides timely feedback, and the entire process is stable and reliable.

[0010] In this technical solution, a drive motor is used to replace the peripheral speed control mechanism, and the internal structure remains basically unchanged. The flyweight and speed control push plate structure are removed. The speed of the fuel engine is controlled according to the user load and working conditions during operation, and the speed change is more precise and intelligent.

[0011] In the electronic speed regulation structure of the above-mentioned single-cylinder air-cooled diesel generator, the driving motor is a stepper motor, a fixing block is fixed on the casing of the engine, the stepper motor is fixed on the fixing block, and the output shaft of the stepper motor faces the shift fork.

[0012] In the electronic speed regulation structure in the above-mentioned single-cylinder air-cooled diesel generator, the upper side of the fixed block is fixed to the outside of the engine casing by bolts, the stepper motor has a cover, the lower side of the fixed block is bent and the cover of the stepper motor is fixed to the lower side of the fixed block by bolts; the shift fork is located in the engine casing; the lower end of the shift fork is connected to the output shaft of the stepper motor, and the upper end of the shift fork is connected to the oil supply assembly.

[0013] In the electronic speed regulation structure in the above-mentioned single-cylinder air-cooled diesel generator, a shift fork shaft is fixedly connected to the output shaft of the stepper motor, a mounting hole is provided at the lower end of the shift fork, one end of the shift fork shaft is inserted into the mounting hole of the shift fork, and a pin for locking the shift fork shaft is threaded on the shift fork.

[0014] In the electronic speed regulation structure of the above-mentioned single-cylinder air-cooled diesel generator, the output shaft of the stepper motor is connected to the other end of the fork shaft through a coupling, and a reset spring is also sleeved on the coupling. The reset spring not only has a reset function, but more importantly, when the output shaft of the stepper motor is plugged into the coupling, the torque of the reset spring can eliminate the gap between the two, overcome the dimensional error caused by processing error and assembly error, and thus make the transmission of the output shaft of the stepper motor and the coupling more accurate and reliable.

[0015] In the electronic speed regulation structure in the above-mentioned single-cylinder air-cooled diesel generator, the central processing unit is a single-chip microcomputer.

[0016] The speed acquisition unit and the central processing unit calculate the output shaft speed of the magneto according to the changing frequency of the winding magnetic signal in the magneto, and then the central processing unit compares it with the preset speed. The central processing unit adjusts the action of the stepper motor through calculus circuits, etc., and uses the output shaft of the stepper motor to accurately adjust the position of the shift fork, thereby controlling the throttle position and fuel injection amount, and finally obtaining the corresponding engine power.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. In this technical solution, under many operating conditions of the diesel engine, the electronic speed control structure can directly control the throttle opening according to the load size of the user's equipment, make precise adjustments, and control the speed within the range required by the user. Long-term high-speed operation will not occur, effectively improving the life of the engine; especially under low load and idling conditions, it effectively saves fuel, reduces noise and reduces the emission of harmful substances.

[0019] 2. This technical solution realizes automatic control of the engine throttle and speed through automatic detection and intelligent control, thereby improving the fuel combustion efficiency in the single-cylinder air-cooled diesel generator; during the entire working process, the electronic control system monitors the engine speed in real time and provides timely feedback, and the entire process is stable and reliable.

[0020] 3. In this technical solution, a stepper motor is used to replace the peripheral speed regulating mechanism, and the internal structure remains unchanged, so that the fuel engine can adjust the speed according to the user load and working conditions during operation, and the speed change is more accurate and intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation structure of the electronic speed regulation structure.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the electronic speed regulation structure.

[0023] Figure 3This is a schematic diagram of the control process structure of the electronic speed regulation structure.

[0024] In the figure, 1, engine; 11, housing; 12, oil supply assembly; 2, drive motor; 21, stepper motor; 21a, cover; 3, shift fork; 31, mounting hole; 32, pin; 4, fixing block; 5, shift fork shaft; 6, coupling; 7, return spring. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] This electronic speed control structure is particularly suitable for single-cylinder air-cooled diesel generators, such as 170, 173, 178, 186, 188, 192 and other single-cylinder air-cooled diesel generators on the general generator market, and is mainly used to control the throttle of the diesel engine; the throttle structure in this embodiment is the same or similar to the throttle structure of a traditional diesel engine, and the flyweight and speed control push plate structure are omitted inside the engine. Figures 1 to 3 As shown, the single-cylinder air-cooled diesel generator in this embodiment includes a magneto and an engine 1, wherein the engine 1 is a single-cylinder air-cooled diesel engine, and the engine 1 includes a housing 11 and an oil supply assembly 12 arranged on the housing 11; the oil supply assembly 12 includes an oil pump, etc., and the output shaft of the engine 1 is connected to the rotor of the magneto, and the rotation of the output shaft of the engine 1 drives the rotor of the magneto to rotate; the electronic speed regulation structure includes a drive motor 2 and a fork 3, and the fork 3 is connected to the throttle in the oil supply assembly 12 and can control the opening and closing angle of the throttle; the output shaft of the drive motor 2 is connected to the fork 3 and can drive the fork 3 to swing back and forth; the electronic speed regulation structure also includes a central processing unit and a speed acquisition unit for measuring the speed of the magneto.

[0027] During use, the central processing unit and the speed acquisition unit use the electromagnetic induction periodic frequency of the magneto winding to calculate the output shaft speed of the magneto. The central processing unit judges the user load and working condition based on this, thereby controlling the corresponding action of the drive motor 2. The drive motor 2 rotates forward or reverses, and the drive motor 2 drives the fork 3 to move. The throttle of the engine 1 is opened or closed at a certain angle driven by the drive motor 2 and the fork 3. The speed of the engine 1 is controlled by controlling the oil intake to achieve idling or high-speed operation. In this embodiment, the throttle and speed of the engine 1 are automatically controlled through automatic detection and intelligent control, which improves the fuel combustion efficiency in the single-cylinder air-cooled diesel generator; during the entire working process, the electronic control system monitors the speed of the engine 1 in real time and provides timely feedback, and the entire process is stable and reliable. In this embodiment, the drive motor 2 is used to replace the peripheral speed regulating mechanism, the internal structure remains basically unchanged, and the traditional fly hammer and speed regulating push plate structure are removed. The fuel engine 1 performs speed regulation according to the user load and working condition during operation, and the speed change is more accurate and intelligent.

[0028] Furthermore, the driving motor 2 in this embodiment is a stepper motor 21, a fixing block 4 is fixedly provided on the housing 11 of the engine 1, the stepper motor 21 is fixedly provided on the fixing block 4, and the output shaft of the stepper motor 21 faces the shift fork 3; the upper side of the fixing block 4 is fixedly provided on the outer side of the housing 11 of the engine 1 by bolts, the stepper motor 21 has a cover 21a, the lower side of the fixing block 4 is bent and the cover 21a of the stepper motor 21 is fixedly provided on the lower side of the fixing block 4 by bolts; the shift fork 3 is located in the housing 11 of the engine 1; the lower end of the shift fork 3 is connected to the stepper motor 21 by bolts. The output shaft of the stepper motor 21 is connected, and the upper end of the shift fork 3 is connected to the oil supply assembly 12; further, a shift fork shaft 5 is fixedly connected to the output shaft of the stepper motor 21, and a mounting hole 31 is opened at the lower end of the shift fork 3, one end of the shift fork shaft 5 is inserted into the mounting hole 31 of the shift fork 3, and a pin 32 for locking the shift fork shaft 5 is screwed on the shift fork 3, and the shift fork 3 and the shift fork shaft 5 form a shift fork lever assembly as a whole; the output shaft of the stepper motor 21 is connected to the other end of the shift fork shaft 5 through a coupling 6, and a return spring 7 is also sleeved on the coupling 6.

[0029] In this embodiment, the central processing unit is a single chip microcomputer; the speed acquisition unit and the central processing unit analyze and calculate the output shaft speed of the magnetic motor according to the changing frequency of the winding magnetic signal in the magnetic motor, and then the central processing unit compares it with the preset speed. The central processing unit adjusts the action of the stepper motor 21 through a calculus circuit, etc., and uses the output shaft of the stepper motor 21 to accurately adjust the position of the fork 3, thereby controlling the throttle position and the amount of fuel injection, and finally obtaining the corresponding power of the engine 1.

[0030] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An electronic speed control structure in a single-cylinder air-cooled diesel generator, the single-cylinder air-cooled diesel generator comprising a magnetic motor and an engine (1), the engine (1) being a single-cylinder air-cooled diesel engine, the engine (1) comprising a housing (11) and an oil supply assembly (12) arranged on the housing (11); the output shaft of the engine (1) is connected to the rotor of the magnetic motor, characterized in that: The electronic speed regulation structure comprises a drive motor (2) and a shift fork (3); the shift fork (3) is connected to a throttle in the oil supply assembly (12) and is capable of controlling the opening and closing angle of the throttle; the output shaft of the drive motor (2) is connected to the shift fork (3) and is capable of driving the shift fork (3) to swing back and forth; the electronic speed regulation structure also comprises a central processing unit and a speed acquisition unit for measuring the speed of the magnetic motor; The driving motor (2) is a stepping motor (21), and the central processing unit is a single chip microcomputer; the speed acquisition unit and the central processing unit calculate the output shaft speed of the magnetic motor according to the frequency change of the winding magnetic signal in the magnetic motor, and then the central processing unit compares it with the preset speed. The central processing unit adjusts the action of the stepping motor (21) through a calculus circuit, and uses the output shaft of the stepping motor (21) to accurately adjust the position of the shift fork (3), thereby controlling the throttle position and the fuel injection amount, and finally obtaining the corresponding power of the engine.

2. The electronic speed regulation structure in the single-cylinder air-cooled diesel generator according to claim 1 is characterized in that: A fixing block (4) is fixedly arranged on the casing (11) of the engine (1), the stepping motor (21) is fixedly arranged on the fixing block (4), and the output shaft of the stepping motor (21) faces the shift fork (3).

3. The electronic speed regulation structure in the single-cylinder air-cooled diesel generator according to claim 2 is characterized in that: The upper side of the fixing block (4) is fixedly mounted on the outer side of the casing (11) of the engine (1) by means of bolts; the stepping motor (21) has a cover (21a); ​​the lower side of the fixing block (4) is bent and the cover (21a) of the stepping motor (21) is fixedly mounted on the lower side of the fixing block (4) by means of bolts; the shift fork (3) is located in the casing (11) of the engine (1); the lower end of the shift fork (3) is connected to the output shaft of the stepping motor (21), and the upper end of the shift fork (3) is connected to the oil supply assembly (12).

4. The electronic speed regulation structure in the single-cylinder air-cooled diesel generator according to claim 3 is characterized in that: A shift fork shaft (5) is fixedly connected to the output shaft of the stepper motor (21); a mounting hole (31) is provided at the lower end of the shift fork (3); one end of the shift fork shaft (5) is inserted into the mounting hole (31) of the shift fork (3); and a pin (32) for locking the shift fork shaft (5) is screwed onto the shift fork (3).

5. The electronic speed regulation structure in the single-cylinder air-cooled diesel generator according to claim 4 is characterized in that: The output shaft of the stepping motor (21) is connected to the other end of the shift fork shaft (5) via a coupling (6), and a return spring (7) is sleeved on the coupling (6).

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