Device for starting single-cylinder internal combustion engine through hydraulic energy accumulator

Abstract

The invention discloses a device for starting a single-cylinder internal combustion engine by utilizing a hydraulic energy accumulator, which belongs to the field of internal combustion engines and comprises a hydraulic motor, an energy accumulator starting hydraulic motor loop, an energy accumulator pressurizing loop, a manual pump pressure supplementing loop and an external equipment driving loop, and the hydraulic motor is connected with a main shaft of the internal combustion engine. High-pressure oil accumulated in the hydraulic energy accumulator drives the hydraulic motor to rotate, the main shaft of the internal combustion engine is driven to rotate at a high speed, and the purpose of rapidly starting the internal combustion engine is achieved; the hydraulic motor is used as a hydraulic motor to drive the internal combustion engine in the starting stage, and then is used as a hydraulic pump to output hydraulic oil, act externally and supplement pressure to the energy accumulator after the internal combustion engine is started; under the condition that the internal combustion engine can be electrically started, the hydraulic energy accumulator is pressurized firstly, and it is guaranteed that the energy accumulator can be used for starting the internal combustion engine; if the electric starting is not successful and the internal pressure of the energy accumulator is insufficient, the manual pump can be used for supplementing the pressure to the energy accumulator; external equipment can also be driven.

Description

Technical Field

[0001] The invention relates to the field of internal combustion engines, and in particular to a device for starting a single-cylinder internal combustion engine by utilizing a hydraulic accumulator. Background Art

[0002] Under the current social background, single-cylinder internal combustion engines (hereinafter referred to as internal combustion engines) still play a significant role in the development of society.

[0003] There are three common starting methods for internal combustion engines: hand starting, electric starting and spring energy storage starting.

[0004] Manual starting requires first turning on the internal combustion engine's built-in pressure reducing switch (to reduce starting resistance), and then using the internal combustion engine's starting handle to drive the internal combustion engine's main shaft to rotate. After reaching a faster speed, the pressure reducing switch is turned off, and the internal combustion engine's main shaft continues to rotate under the drive of inertia to start the internal combustion engine. This starting method has high requirements on the strength and skills of the starter, because the internal combustion engine's main shaft must reach a certain speed and turn off the pressure reducing switch at the right time to start smoothly. The power of the internal combustion engines used now is getting bigger and bigger. Manual starting can still have a certain applicability for starting smaller power internal combustion engines, but for larger power internal combustion engines, manual starting basically can no longer meet the starting needs of internal combustion engines.

[0005] Electric starting is a method of starting the engine by using the electric energy inside the battery to drive the starter motor to rotate, which in turn drives the main shaft of the internal combustion engine to rotate. This method has been widely popularized and is a very mature method of starting internal combustion engines. However, this method relies too much on the battery. When the battery is dead or insufficient, the internal combustion engine will not be able to start.

[0006] Spring energy storage starting is a starting method that uses the elastic potential energy stored inside the spring to drive the internal combustion engine main shaft to rotate. This method has a certain adaptability to common models of internal combustion engines, but when the spring energy storage starter cannot be adapted and installed, this method cannot meet the starting requirements. Summary of the invention

[0007] The purpose of the present invention is to provide a device for starting a single-cylinder internal combustion engine using a hydraulic accumulator, so as to solve the problem that the existing internal combustion engine starting method described in the background technology has shortcomings and cannot meet the starting requirements.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] The present invention discloses a device for starting a single-cylinder internal combustion engine by using a hydraulic accumulator, comprising a hydraulic motor, wherein the hydraulic motor is connected to the main shaft of the internal combustion engine and comprises an accumulator-starting hydraulic motor circuit, wherein the accumulator-starting hydraulic motor circuit comprises a first pipeline, wherein one end of the first pipeline is connected to an oil storage tank, and the other end of the first pipeline is connected to the hydraulic motor, a fourth pipeline is provided on the first pipeline, and a control valve B is provided on the fourth pipeline, the fourth pipeline is connected to the accumulator through a third pipeline, and a control valve C is provided on the third pipeline, the hydraulic motor is also connected to a sixth pipeline, the sixth pipeline is connected to a ninth pipeline through a tenth pipeline, the ninth pipeline is connected to the oil storage tank, and a control valve E is provided on the ninth pipeline.

[0010] Furthermore, it also includes an internal combustion engine as an accumulator charging circuit, the internal combustion engine as an accumulator charging circuit includes the first pipeline and the sixth pipeline connected to the hydraulic motor, the sixth pipeline is connected to the fifth pipeline, the fifth pipeline is provided with a one-way valve A, and the fifth pipeline is connected to the accumulator through the third pipeline.

[0011] Furthermore, it also includes a manual pump pressure compensation circuit, which includes a second pipeline, on which a manual pump and a one-way valve B are provided, one end of the second pipeline is connected to the first pipeline, and the other end of the second pipeline is connected to the accumulator through the third pipeline.

[0012] Furthermore, it also includes a circuit for driving external equipment, and the circuit for driving external equipment includes the first pipeline and the sixth pipeline connected to the hydraulic motor, the sixth pipeline is connected to the seventh pipeline through the tenth pipeline, the seventh pipeline is provided with a control valve A, and the seventh pipeline is connected to the external equipment.

[0013] Furthermore, the accumulator is connected to the oil storage tank through an eighth pipeline, and a control valve D and a relief valve B are provided on the eighth pipeline.

[0014] Furthermore, an overflow valve A is provided on the sixth pipeline.

[0015] Furthermore, a one-way valve C is provided on the first pipeline near the oil storage tank.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are:

[0017] The present invention proposes a novel energy storage starting scheme, which utilizes the high-pressure pressure oil accumulated in the hydraulic accumulator to drive the hydraulic motor to rotate, and then drives the internal combustion engine main shaft to rotate at high speed, so as to achieve the purpose of quickly starting the internal combustion engine; the hydraulic motor acts as a hydraulic motor to drive the internal combustion engine in the starting stage, and then acts as a hydraulic pump after the internal combustion engine is started, outputting hydraulic oil, acting externally and replenishing pressure to the accumulator; the present invention can also charge the hydraulic accumulator in advance when the internal combustion engine can be started electrically, so as to ensure that the accumulator can be used to start the internal combustion engine; if the electric start is unsuccessful and the internal pressure of the accumulator is insufficient, the manual pump provided by the system can be used to replenish the pressure of the accumulator; the present invention can also drive external equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a hydraulic principle diagram of a device for starting a single-cylinder internal combustion engine using a hydraulic accumulator according to the present invention;

[0020] Figure 2 This is the energy storage start hydraulic flow diagram of the present invention;

[0021] Figure 3 It is the hydraulic flow diagram of the internal combustion engine pressurization of the present invention;

[0022] Figure 4 This is the hydraulic flow diagram of the manual pump pressure replenishment of the present invention;

[0023] Figure 5 This is the hydraulic flow diagram for driving external equipment of the present invention.

[0024] Explanation of the accompanying drawings: 1. internal combustion engine; 2. hydraulic motor; 3. control valve A; 4. control valve B; 5. control valve C; 6. control valve D; 7. accumulator; 8. manual pump; 9. one-way valve A; 10. one-way valve B; 11. one-way valve C; 12. overflow valve A; 13. overflow valve B; 14. oil storage tank; 15. first pipeline; 16. second pipeline; 17. third pipeline; 18. fourth pipeline; 19. fifth pipeline; 20. sixth pipeline; 21. seventh pipeline; 22. eighth pipeline; 23. ninth pipeline; 24. control valve E; 25. external equipment; 26. tenth pipeline. DETAILED DESCRIPTION

[0025] like Figure 1-5 As shown, a device for starting a single-cylinder internal combustion engine using a hydraulic accumulator includes a hydraulic motor 2, wherein the hydraulic motor 2 is connected to the main shaft of the internal combustion engine 1, and includes an accumulator-starting hydraulic motor circuit, such as Figure 2As shown, the accumulator starting hydraulic motor circuit includes a first pipeline 15, one end of the first pipeline 15 is connected to the oil storage tank 14, the other end of the first pipeline 15 is connected to the hydraulic motor 2, the first pipeline 15 is connected to the fourth pipeline 18, the fourth pipeline 18 is installed with a control valve B4, the fourth pipeline 18 is connected to the accumulator 7 through the third pipeline 17, the third pipeline 17 is installed with a control valve C5, the control valve C5 is the main switch for the external output of the accumulator 7, the hydraulic motor 2 is also connected to the sixth pipeline 20, the sixth pipeline 20 is connected to the ninth pipeline 23 through the tenth pipeline 26, the ninth pipeline 23 is connected to the oil storage tank 14, and the ninth pipeline 23 is installed with a control valve E24.

[0026] The accumulator 7 is connected to the oil storage tank 14 through the eighth pipeline 22, and the eighth pipeline 22 is installed with a control valve D6 and a relief valve B13; the sixth pipeline 20 is installed with a relief valve A12; and a one-way valve C11 is installed on the first pipeline 15 near the oil storage tank 14.

[0027] When the hydraulic oil pressure stored in the accumulator 7 reaches 10MPa, the internal combustion engine 1 can be started. Specific operation steps: Step 1, open the control valve C5; Step 2, open the pressure reducing switch of the internal combustion engine 1 to reduce the starting resistance; Step 3, open the control valve B4, at this time, the high-pressure oil drives the hydraulic motor 2 to rotate, and the hydraulic motor 2 drives the main shaft of the internal combustion engine 1 to rotate; Step 4, after the main shaft of the internal combustion engine reaches a certain speed, close the pressure reducing switch of the internal combustion engine 1; Step 5, when the internal combustion engine 1 is started, close the control valve B4; Step 6, close the control valve C5. The specific hydraulic flow is as follows: Figure 2 As shown, the hydraulic oil stored in the accumulator 7 flows into the third pipeline 17, the fourth pipeline 18, and the first pipeline 15 in sequence. After the hydraulic motor 2 is started, the hydraulic oil flows into the oil storage tank 14 through the sixth pipeline 20, the tenth pipeline 26, and the ninth pipeline 23. In this process, in the hydraulic system, the control valve C5, the control valve B4, and the control valve E24 are in the open state, and the control valve A3 and the control valve D6 are in the closed state.

[0028] It also includes the internal combustion engine charging circuit for the accumulator, such as Figure 3 As shown, the internal combustion engine is an accumulator charging circuit including the first pipeline 15 and the sixth pipeline 20 connected to the hydraulic motor 2, the sixth pipeline 20 is connected to the fifth pipeline 19, a one-way valve A9 is installed on the fifth pipeline 19, and the fifth pipeline 19 is connected to the accumulator 7 through the third pipeline 17.

[0029] In a conventional hydraulic system, the internal combustion engine 1 acts as a power source to provide power to the hydraulic motor 2, so that the hydraulic motor 2 can absorb oil from one side and output high-pressure oil from the other side. Therefore, when the internal combustion engine 1 can be electrically started, the hydraulic accumulator 7 is first pressurized to ensure that the accumulator 7 can be used to start the internal combustion engine 1. Specific steps: Step 1, open the manual control valve C5; Step 2, start the internal combustion engine 1, increase the speed of the internal combustion engine to more than 1500r / min, and ensure that the internal combustion engine can provide sufficient power; Step 3, after the internal combustion engine 1 has been running normally for 3 minutes, close the control valve A3 and control valve E24; Step 4, after 0.5 minutes, close the control valve C5; Step 5, open the control valve E24; Step 6, shut down the internal combustion engine 1. The specific hydraulic flow direction is as follows: Figure 4 As shown, the hydraulic oil in the oil storage tank 14 enters the hydraulic motor 2 through the first pipeline 15, and the high-pressure oil output by the hydraulic motor 2 enters the accumulator 7 through the sixth pipeline 20, the fifth pipeline 19, and the third pipeline 17 to charge the accumulator 7; in this process, the control valve C5 is in the open state, and the control valve A3, the control valve B4, the control valve D6, and the control valve E24 are in the closed state.

[0030] It also includes a manual pump pressure compensation circuit, such as Figure 4 As shown, the manual pump pressure compensation circuit includes a second pipeline 16, on which a manual pump 8 and a one-way valve B10 are installed. One end of the second pipeline 16 is connected to the first pipeline 15, and the other end of the second pipeline 16 is connected to the accumulator 7 through the third pipeline 17.

[0031] If the electric start fails and the pressure inside the accumulator 7 is insufficient, you can use the manual pump 8 provided by the system to replenish the pressure of the accumulator 7. Specific operation steps: Step 1, open the control valve C5; Step 2, use the manual pump 8 to replenish the pressure, use the manual pump handle to press the manual pump 8, so that high-pressure oil is obtained at the outlet of the manual pump 8; Step 3, when the pressure of the accumulator 7 reaches 10MPa, close the control valve C5. The specific hydraulic flow direction is as follows: Figure 3 As shown, the hydraulic oil in the oil storage tank 14 enters the manual pump 8 through the first pipeline 15 and the second pipeline 16 to be pressurized to obtain high-pressure oil, and the high-pressure oil enters the accumulator 7 through the second pipeline 16 and the third pipeline 17 to supplement the pressure of the accumulator 7. In this process, the control valve C5 is in the open state, and the control valve A3, the control valve B4, the control valve D6, and the control valve E24 are in the closed state.

[0032] It also includes driving external device circuits, such as Figure 5As shown, the circuit for driving the external device includes the first pipeline 15 and the sixth pipeline 20 connected to the hydraulic motor 2. The sixth pipeline 20 is connected to the seventh pipeline 21 through the tenth pipeline 26. The seventh pipeline 21 is installed with a control valve A3. The seventh pipeline 21 is connected to the external device 25.

[0033] When driving an external hydraulic device, the control valve A3 is opened, the hydraulic oil in the oil storage tank 14 enters the hydraulic motor 2 through the first pipeline 15, and the high-pressure oil output by the hydraulic motor 2 enters the external device through the sixth pipeline 20, the tenth pipeline 26, and the seventh pipeline 21. In this process, the control valve A3 is in the open state, and the control valves B4, C5, D6, and E24 are in the closed state.

[0034] Control valve A, control valve B, control valve C, control valve D, and control valve E24 can be manual valves, solenoid valves, reversing valves, etc., and their quantity can be set to one or more according to actual needs.

[0035] The present invention is mainly used for being installed on a relatively high-power internal combustion engine that cannot be adapted to a spring energy storage starter, so as to replace the electric starter to meet the starting requirements of the internal combustion engine.

[0036] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for starting a single-cylinder internal combustion engine using a hydraulic accumulator, comprising a hydraulic motor (2), wherein the hydraulic motor (2) is connected to the main shaft of the internal combustion engine (1), and characterized in that: The invention comprises an accumulator-starting hydraulic motor circuit, wherein the accumulator-starting hydraulic motor circuit comprises a first pipeline (15), one end of the first pipeline (15) is connected to an oil storage tank (14), the other end of the first pipeline (15) is connected to the hydraulic motor (2), a fourth pipeline (18) is arranged on the first pipeline (15), a control valve B (4) is arranged on the fourth pipeline (18), the fourth pipeline (18) is connected to an accumulator (7) through a third pipeline (17), a control valve C (5) is arranged on the third pipeline (17), the hydraulic motor (2) is also connected to a sixth pipeline (20), the sixth pipeline (20) is connected to a ninth pipeline (23) through a tenth pipeline (26), the ninth pipeline (23) is connected to the oil storage tank (14), and a control valve E (24) is arranged on the ninth pipeline (23).

2. The device for starting a single-cylinder internal combustion engine using a hydraulic accumulator according to claim 1, characterized in that: The invention also includes an internal combustion engine as an accumulator charging circuit, wherein the internal combustion engine as an accumulator charging circuit includes the first pipeline (15) and the sixth pipeline (20) connected to the hydraulic motor (2), the sixth pipeline (20) is connected to the fifth pipeline (19), a one-way valve A (9) is provided on the fifth pipeline (19), and the fifth pipeline (19) is connected to the accumulator (7) through the third pipeline (17).

3. The device for starting a single-cylinder internal combustion engine using a hydraulic accumulator according to claim 1, characterized in that: The invention also comprises a manual pump pressure compensation circuit, wherein the manual pump pressure compensation circuit comprises a second pipeline (16), a manual pump (8) and a one-way valve B (10) are arranged on the second pipeline (16), one end of the second pipeline (16) is connected to the first pipeline (15), and the other end of the second pipeline (16) is connected to the accumulator (7) through the third pipeline (17).

4. The device for starting a single-cylinder internal combustion engine using a hydraulic accumulator according to claim 1, characterized in that: The invention also includes a circuit for driving an external device, wherein the circuit for driving an external device includes the first pipeline (15) and the sixth pipeline (20) which are connected to the hydraulic motor (2); the sixth pipeline (20) is connected to the seventh pipeline (21) through the tenth pipeline (26); the seventh pipeline (21) is provided with a control valve A (3); and the seventh pipeline (21) is connected to an external device (25).

5. The device for starting a single-cylinder internal combustion engine using a hydraulic accumulator according to claim 1, characterized in that: The accumulator (7) is connected to the oil storage tank (14) via an eighth pipeline (22), and a control valve D (6) and a relief valve B (13) are provided on the eighth pipeline (22).

6. The device for starting a single-cylinder internal combustion engine using a hydraulic accumulator according to claim 1, characterized in that: The sixth pipeline (20) is provided with an overflow valve A (12).

7. The device for starting a single-cylinder internal combustion engine using a hydraulic accumulator according to claim 1, characterized in that: A one-way valve C (11) is provided on the first pipeline (15) at a position close to the oil storage tank (14).

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