Gas engine knock control system and method

Abstract

The invention relates to a knock control system for a gas engine. The device comprises a rear exhaust manifold, a water temperature sensor, a control line, a gas inlet throttle valve, a control module, a gas control valve, a gas inlet manifold temperature sensor, a gas inlet manifold pressure sensor, an ignition coil, a gas inlet manifold, a crankshaft rotating speed sensor, a waste gas flow control valve, a Venturi tube, a differential pressure sensor, a first waste gas flowing pipe, a second waste gas flowing pipe and a front exhaust manifold. A front exhaust pressure sensor, a front exhaust temperature sensor, a rear exhaust temperature sensor and a rear exhaust pressure sensor. The invention further relates to a method using the gas engine knock control system. According to the invention, the engine is accurately controlled in real time, and the occurrence of knocking is reduced; and the maintenance cost of the engine is reduced.

Description

Technical Field

[0001] This invention relates to the field of gas engine technology, and more specifically to a gas engine knock control system and method. Background Technology

[0002] Natural gas engines face significant challenges to reliability due to knocking. However, effective knock control methods can reduce knocking, thereby minimizing component failures and protecting the engine.

[0003] The shortcomings of existing technology are: Traditional detonation control uses detonation sensors to control detonation after it occurs, which is a reactive defense and cannot prevent detonation from happening. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a gas engine knock control system and method, aiming to achieve real-time precise control of the engine, reduce the occurrence of knock, and lower engine maintenance costs.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows: A gas engine knock control system includes a rear exhaust manifold, a water temperature sensor, control lines, an intake throttle valve, a control module, a gas control valve, an intake manifold temperature sensor, an intake manifold pressure sensor, an ignition coil, an intake manifold, a crankshaft speed sensor, an exhaust gas flow control valve, a venturi tube, a differential pressure sensor, a first exhaust gas flow pipe, a second exhaust gas flow pipe, a front exhaust manifold, a front exhaust pressure sensor, a front exhaust temperature sensor, a rear exhaust temperature sensor, and a rear exhaust pressure sensor, wherein: The front exhaust manifold and the rear exhaust manifold are respectively installed on the exhaust side of the cylinder head of the gas engine; one end of the venturi tube is connected to the front exhaust manifold through the first exhaust gas flow pipe, and the other end is connected to the intake manifold through the second exhaust gas flow pipe; the differential pressure sensor is installed on the venturi tube; the exhaust gas flow control valve is installed on the second exhaust gas flow pipe, and the exhaust gas flow control valve is electrically coupled to the control module through the control line; the front exhaust pressure sensor and the front exhaust temperature sensor are respectively installed on the front exhaust manifold; the front exhaust pressure sensor and the front exhaust temperature sensor are respectively electrically coupled to the control module through the control line; the rear exhaust temperature sensor and the rear exhaust pressure sensor are respectively installed on the rear exhaust manifold; the rear exhaust temperature sensor and the rear exhaust pressure sensor are respectively electrically coupled to the control module through the control line. The intake manifold is installed at the intake end of the engine; the intake port of the intake manifold is equipped with the intake throttle valve, which is electrically coupled to the control module via the control line; the gas control valve is installed on the intake manifold and electrically coupled to the control module via the control line; the intake manifold pressure sensor is installed on the intake manifold and electrically coupled to the control module via the control line; the intake manifold temperature sensor is installed on the intake manifold and electrically coupled to the control module via the control line; the ignition coil is installed in each cylinder above the engine and electrically coupled to the control module via the control line; the crankshaft speed sensor is installed at the front end of the engine and electrically coupled to the control module via the control line; the coolant temperature sensor is installed at the rear end of the engine and electrically coupled to the control module via the control line.

[0006] Preferably, the ignition coil has 6 coils.

[0007] A method utilizing the aforementioned gas engine knock control system includes the following steps: S100. Real-time acquisition of engine coolant temperature, intake manifold temperature, front exhaust manifold temperature, rear exhaust manifold temperature, front exhaust manifold pressure, rear exhaust manifold pressure, crankshaft speed, and pressure difference, and transmission of the acquired real-time parameters to the control module. S200. Determine whether the intake manifold temperature is higher than a preset intake manifold temperature threshold, and then perform the following operations based on the determination result: If the intake manifold temperature is higher than the intake manifold temperature threshold, the ignition coil is controlled to reduce the ignition angle according to the crankshaft speed based on the preset intake temperature adjustment step size until the intake manifold temperature is reduced to within the intake manifold temperature threshold, and then step S300 is executed. If the intake manifold temperature is not higher than the intake manifold temperature threshold, then proceed to step S300; S300. Determine whether the front exhaust manifold temperature and the rear exhaust manifold temperature are both less than or equal to a preset first exhaust manifold temperature threshold, and whether the front exhaust manifold pressure and the rear exhaust manifold pressure are both less than or equal to a preset exhaust manifold pressure threshold. Then, perform the following operations based on the determination results: If the front exhaust manifold temperature is greater than the first exhaust manifold temperature threshold, or the rear exhaust manifold temperature is greater than the first exhaust manifold temperature threshold, or the front exhaust manifold pressure is greater than the exhaust manifold pressure threshold, or the rear exhaust manifold pressure is greater than the exhaust manifold pressure threshold, then the opening of the exhaust gas flow control valve is adjusted according to the current differential pressure monitored by the differential pressure sensor until the front exhaust manifold temperature and the rear exhaust manifold temperature are reduced to within the first exhaust manifold temperature threshold, and the front exhaust manifold pressure and the rear exhaust manifold pressure are reduced to within the exhaust manifold pressure threshold, and then step S400 is executed; If the front exhaust manifold temperature and the rear exhaust manifold temperature are both less than or equal to the first exhaust manifold temperature threshold, and the front exhaust manifold pressure and the rear exhaust manifold pressure are both less than or equal to the exhaust manifold pressure threshold, then step S400 is executed. S400. Determine whether the temperature of the front exhaust manifold or the temperature of the rear exhaust manifold is lower than a preset second exhaust manifold temperature threshold, and then perform the following operations based on the determination result: If the temperature of the front exhaust manifold or the temperature of the rear exhaust manifold are lower than the second exhaust manifold temperature threshold, the crankshaft speed is controlled to increase the ignition angle of the ignition coil according to the preset exhaust temperature adjustment step size until the temperature of the front exhaust manifold and the temperature of the rear exhaust manifold are not lower than the second exhaust manifold temperature threshold, and then step S500 is executed. If both the front exhaust manifold temperature and the rear exhaust manifold temperature are not lower than the second exhaust manifold temperature threshold, then step S500 is executed. S500. Determine whether the engine coolant temperature is lower than a preset engine coolant temperature threshold, and then perform the following operations based on the determination result: If the engine coolant temperature is not lower than the engine coolant temperature threshold, then for every 1°C increase in coolant temperature, the engine jet volume decreases by 1%. If the engine coolant temperature is lower than the engine coolant temperature threshold, the engine is determined to be operating normally, and then step S600 is executed. S600. Cycle through steps S100 to S500 to control the engine's combustion and knocking to a normal state.

[0008] Preferably, the intake manifold temperature threshold is 55°C.

[0009] Preferably, the intake air temperature adjustment step is such that for every 2°C increase above the intake manifold temperature threshold, the ignition angle of the six ignition coils is reduced by 1°.

[0010] Preferably, the temperature threshold of the first exhaust manifold is 780°C.

[0011] Preferably, the exhaust manifold pressure threshold is 400 kPa.

[0012] Preferably, the temperature threshold of the second exhaust manifold is 55°C.

[0013] Preferably, the exhaust temperature adjustment step is such that for every 2°C below the second exhaust manifold temperature threshold, the ignition angle of the six ignition coils is increased by 1°, and the increase in ignition angle does not exceed 3°.

[0014] Preferably, the engine water temperature threshold is 95°C.

[0015] Compared with the prior art, the present invention has the following advantages: 1. This invention introduces the design of exhaust manifold temperature and pressure, and precisely adjusts the engine's operating parameters by controlling the engine's intake air temperature, coolant temperature, crankshaft angle, exhaust pressure, and exhaust temperature, thereby achieving real-time precise control of the engine and reducing the occurrence of knocking.

[0016] 2. The gas engine knock control system and method of the present invention can be widely used in various types of gas engines, with strong versatility, thereby reducing engine maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the gas engine knock control system structure according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the control flow of the gas engine knock control system according to a specific embodiment of the present invention.

[0018] The components are: 1. Rear exhaust manifold, 2. Water temperature sensor, 3. Control line, 4. Intake throttle valve, 5. Control module, 6. Gas control valve, 7. Intake manifold temperature sensor, 8. Intake manifold pressure sensor, 9. Ignition coil, 10. Intake manifold, 11. Crankshaft speed sensor, 12. Exhaust gas flow control valve, 13. Venturi tube, 14. Differential pressure sensor, 15.1. First exhaust gas flow pipe, 15.2. Second exhaust gas flow pipe, 16. Front exhaust manifold, 17. Front exhaust pressure sensor, 18. Front exhaust temperature sensor, 19. Rear exhaust temperature sensor, 20. Rear exhaust pressure sensor. Detailed Implementation

[0019] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0020] This invention application claims protection for a gas engine knock control system, such as... Figure 1 The diagram shows the following components: rear exhaust manifold 1, water temperature sensor 2, control line 3, intake throttle valve 4, control module 5, gas control valve 6, intake manifold temperature sensor 7, intake manifold pressure sensor 8, ignition coil 9, intake manifold 10, crankshaft speed sensor 11, exhaust gas flow control valve 12, venturi tube 13, differential pressure sensor 14, first exhaust gas flow pipe 15.1, second exhaust gas flow pipe 15.2, front exhaust manifold 16, front exhaust pressure sensor 17, front exhaust temperature sensor 18, rear exhaust temperature sensor 19, and rear exhaust pressure sensor 20. Wherein: The front exhaust manifold 16 and the rear exhaust manifold 1 are respectively installed on the exhaust side of the cylinder head of the gas engine; one end of the venturi tube 13 is connected to the front exhaust manifold 16 through the first exhaust gas flow pipe 15.1, and the other end is connected to the intake manifold 10 through the second exhaust gas flow pipe 15.2; a differential pressure sensor 14 is installed on the venturi tube 13; an exhaust gas flow control valve 12 is installed on the second exhaust gas flow pipe 15.2, and the exhaust gas flow control valve 12 is electrically coupled to the control module 5 through the control line 3; the front exhaust pressure sensor 17 and the front exhaust temperature sensor 18 are respectively installed on the front exhaust manifold 16; the front exhaust pressure sensor 17 and the front exhaust temperature sensor 18 are respectively electrically coupled to the control module 5 through the control line 3; the rear exhaust temperature sensor 19 and the rear exhaust pressure sensor 20 are respectively installed on the rear exhaust manifold 1; the rear exhaust temperature sensor 19 and the rear exhaust pressure sensor 20 are respectively electrically coupled to the control module 5 through the control line 3. 3 is electrically coupled to control module 5; intake manifold 10 is installed at the intake end of the engine; intake throttle valve 4 is installed at the intake port of intake manifold 10, and intake throttle valve 4 is electrically coupled to control module 5 via control line 3; gas control valve 6 is installed on intake manifold 10 and is electrically coupled to control module 5 via control line 3; intake manifold pressure sensor 8 is installed on intake manifold 10 and is electrically coupled to control module 5 via control line 3; intake manifold temperature sensor 7 is installed on intake manifold 10 and is electrically coupled to control module 5 via control line 3; ignition coil 9 is installed in each cylinder above the engine and is electrically coupled to control module 5 via control line 3; crankshaft speed sensor 11 is installed at the front end of the engine and is electrically coupled to control module 5 via control line 3; coolant temperature sensor 2 is installed at the rear end of the engine and is electrically coupled to control module 5 via control line 3.

[0021] In this specific embodiment, there are 6 ignition coils 9.

[0022] A method utilizing a gas engine knock control system, such as Figure 2 As shown, it includes the following steps: S100. Real-time acquisition of engine coolant temperature, intake manifold temperature, front exhaust manifold temperature, rear exhaust manifold temperature, front exhaust manifold pressure, rear exhaust manifold pressure, crankshaft speed, and pressure difference, and transmission of the acquired real-time parameters to control module 5.

[0023] S200. Determine whether the intake manifold temperature is higher than the preset intake manifold temperature threshold, and then perform the following operations based on the determination result: If the intake manifold temperature is higher than the intake manifold temperature threshold, the ignition coil 9 is controlled to reduce the ignition angle according to the crankshaft speed based on the preset intake temperature adjustment step size until the intake manifold temperature is reduced to within the intake manifold temperature threshold, and then step S300 is executed.

[0024] If the intake manifold temperature is not higher than the intake manifold temperature threshold, then proceed to step S300.

[0025] S300. Determine whether the front exhaust manifold temperature and the rear exhaust manifold temperature are both less than or equal to a preset first exhaust manifold temperature threshold, and whether the front exhaust manifold pressure and the rear exhaust manifold pressure are both less than or equal to a preset exhaust manifold pressure threshold. Then, perform the following operations based on the determination results: If the front exhaust manifold temperature is greater than the first exhaust manifold temperature threshold, or the rear exhaust manifold temperature is greater than the first exhaust manifold temperature threshold, or the front exhaust manifold pressure is greater than the exhaust manifold pressure threshold, or the rear exhaust manifold pressure is greater than the exhaust manifold pressure threshold, then the opening of the exhaust gas flow control valve 12 is adjusted according to the current pressure difference monitored by the differential pressure sensor 14 until the front exhaust manifold temperature and the rear exhaust manifold temperature are reduced to within the first exhaust manifold temperature threshold, and the front exhaust manifold pressure and the rear exhaust manifold pressure are reduced to within the exhaust manifold pressure threshold, and then step S400 is executed. If both the front exhaust manifold temperature and the rear exhaust manifold temperature are less than or equal to the first exhaust manifold temperature threshold, and both the front exhaust manifold pressure and the rear exhaust manifold pressure are less than or equal to the exhaust manifold pressure threshold, then proceed to step S400. S400. Determine whether the temperature of the front exhaust manifold or the rear exhaust manifold is lower than the preset second exhaust manifold temperature threshold, and then perform the following operations based on the determination result: If the temperature of the front exhaust manifold or the temperature of the rear exhaust manifold are lower than the second exhaust manifold temperature threshold, the ignition coil 9 is controlled to increase the ignition angle according to the preset exhaust temperature adjustment step crankshaft speed until the temperature of the front exhaust manifold and the temperature of the rear exhaust manifold are not lower than the second exhaust manifold temperature threshold, and then step S500 is executed.

[0026] If the temperatures of both the front and rear exhaust manifolds are not lower than the second exhaust manifold temperature threshold, then proceed to step S500.

[0027] S500. Determine if the engine coolant temperature is lower than the preset engine coolant temperature threshold, and then perform the following operations based on the determination result: If the engine coolant temperature is not lower than the engine coolant temperature threshold, the engine jet volume will decrease by 1% for every 1°C increase in coolant temperature.

[0028] If the engine coolant temperature is lower than the engine coolant temperature threshold, the engine is determined to be operating normally, and then step S600 is executed. S600. Cycle through steps S100 to S500 to control the engine's combustion and knocking to a normal state.

[0029] This logic allows for adjustments to be made to different engine operating conditions, thereby enabling precise control of engine combustion and thus engine knocking.

[0030] In this specific embodiment, the intake manifold temperature threshold is 55°C.

[0031] In this specific embodiment, the intake air temperature adjustment step is 2°C above the intake manifold temperature threshold, in which case the 6 ignition coils 9 are controlled to reduce the ignition angle by 1°.

[0032] In this specific embodiment, the temperature threshold of the first exhaust manifold is 780°C.

[0033] In this specific embodiment, the exhaust manifold pressure threshold is 400 kPa.

[0034] In this specific embodiment, the temperature threshold of the second exhaust manifold is 55°C.

[0035] In this specific embodiment, the exhaust temperature adjustment step is such that for every 2°C below the second exhaust manifold temperature threshold, the ignition angle of the 6 ignition coils 9 is increased by 1°, and the increase in ignition angle does not exceed 3°.

[0036] In this specific embodiment, the engine coolant temperature threshold is 95°C.

[0037] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0038] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0039] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A gas engine knock control system, characterized in that: Includes a rear exhaust manifold (1), a water temperature sensor (2), a control line (3), an intake throttle valve (4), a control module (5), a gas control valve (6), an intake manifold temperature sensor (7), an intake manifold pressure sensor (8), an ignition coil (9), an intake manifold (10), a crankshaft speed sensor (11), an exhaust gas flow control valve (12), a venturi tube (13), a differential pressure sensor (14), a first exhaust gas flow pipe (15.1), a second exhaust gas flow pipe (15.2), a front exhaust manifold (16), a front exhaust pressure sensor (17), a front exhaust temperature sensor (18), a rear exhaust temperature sensor (19), and a rear exhaust pressure sensor (20), wherein: The front exhaust manifold (16) and the rear exhaust manifold (1) are respectively installed on the exhaust side of the gas engine cylinder head; one end of the venturi tube (13) is connected to the front exhaust manifold (16) through the first exhaust gas flow pipe (15.1), and the other end is connected to the intake manifold (10) through the second exhaust gas flow pipe (15.2); the differential pressure sensor (14) is installed on the venturi tube (13); the exhaust gas flow control valve (12) is installed on the second exhaust gas flow pipe (15.2), and the exhaust gas flow control valve (12) is connected to the control line (3) through the control line (3). The control module (5) is electrically coupled; the front exhaust pressure sensor (17) and the front exhaust temperature sensor (18) are respectively installed on the front exhaust manifold (16); the front exhaust pressure sensor (17) and the front exhaust temperature sensor (18) are respectively electrically coupled to the control module (5) through the control line (3); the rear exhaust temperature sensor (19) and the rear exhaust pressure sensor (20) are respectively installed on the rear exhaust manifold (1); the rear exhaust temperature sensor (19) and the rear exhaust pressure sensor (20) are respectively electrically coupled to the control module (5) through the control line (3). The control module (5) is electrically coupled; the intake manifold (10) is installed at the intake end of the engine; the intake throttle valve (4) is installed at the intake port of the intake manifold (10), and the intake throttle valve (4) is electrically coupled to the control module (5) via the control line (3); the gas control valve (6) is installed on the intake manifold (10) and is electrically coupled to the control module (5) via the control line (3); the intake manifold pressure sensor (8) is installed on the intake manifold (10) and is electrically coupled to the control module (5) via the control line (3). The intake manifold temperature sensor (7) is installed on the intake manifold (10) and is electrically coupled to the control module (5) via the control line (3); the ignition coil (9) is installed in each cylinder above the engine and is electrically coupled to the control module (5) via the control line (3); the crankshaft speed sensor (11) is installed at the front end of the engine and is electrically coupled to the control module (5) via the control line (3); the water temperature sensor (2) is installed at the rear end of the engine and is electrically coupled to the control module (5) via the control line (3).

2. The gas engine knock control system according to claim 1, characterized in that: The ignition coil (9) has 6 coils.

3. A method utilizing the gas engine knock control system according to any one of claims 1 to 2, characterized in that: Includes the following steps: S100. Real-time acquisition of engine coolant temperature, intake manifold temperature, front exhaust manifold temperature, rear exhaust manifold temperature, front exhaust manifold pressure, rear exhaust manifold pressure, crankshaft speed, and pressure difference, and transmission of the acquired real-time parameters to the control module (5). S200. Determine whether the intake manifold temperature is higher than a preset intake manifold temperature threshold, and then perform the following operations based on the determination result: If the intake manifold temperature is higher than the intake manifold temperature threshold, the ignition coil (9) is controlled to reduce the ignition angle according to the crankshaft speed based on the preset intake temperature adjustment step size until the intake manifold temperature is reduced to within the intake manifold temperature threshold, and then step S300 is executed. If the intake manifold temperature is not higher than the intake manifold temperature threshold, then proceed to step S300; S300. Determine whether the front exhaust manifold temperature and the rear exhaust manifold temperature are both less than or equal to a preset first exhaust manifold temperature threshold, and whether the front exhaust manifold pressure and the rear exhaust manifold pressure are both less than or equal to a preset exhaust manifold pressure threshold. Then, perform the following operations based on the determination results: If the front exhaust manifold temperature is greater than the first exhaust manifold temperature threshold, or the rear exhaust manifold temperature is greater than the first exhaust manifold temperature threshold, or the front exhaust manifold pressure is greater than the exhaust manifold pressure threshold, or the rear exhaust manifold pressure is greater than the exhaust manifold pressure threshold, then the opening of the exhaust gas flow control valve (12) is adjusted according to the current differential pressure monitored by the differential pressure sensor (14) until the front exhaust manifold temperature and the rear exhaust manifold temperature are reduced to within the first exhaust manifold temperature threshold, and the front exhaust manifold pressure and the rear exhaust manifold pressure are reduced to within the exhaust manifold pressure threshold, and then step S400 is executed; If the front exhaust manifold temperature and the rear exhaust manifold temperature are both less than or equal to the first exhaust manifold temperature threshold, and the front exhaust manifold pressure and the rear exhaust manifold pressure are both less than or equal to the exhaust manifold pressure threshold, then step S400 is executed. S400. Determine whether the temperature of the front exhaust manifold or the temperature of the rear exhaust manifold is lower than a preset second exhaust manifold temperature threshold, and then perform the following operations based on the determination result: If the temperature of the front exhaust manifold or the temperature of the rear exhaust manifold are lower than the second exhaust manifold temperature threshold, the crankshaft speed is controlled according to the preset exhaust temperature adjustment step to increase the ignition coil (9) by increasing the ignition angle accordingly, until the temperature of the front exhaust manifold and the temperature of the rear exhaust manifold are not lower than the second exhaust manifold temperature threshold, and then step S500 is executed. If both the front exhaust manifold temperature and the rear exhaust manifold temperature are not lower than the second exhaust manifold temperature threshold, then step S500 is executed. S500. Determine whether the engine coolant temperature is lower than a preset engine coolant temperature threshold, and then perform the following operations based on the determination result: If the engine coolant temperature is not lower than the engine coolant temperature threshold, then for every 1°C increase in coolant temperature, the engine jet volume decreases by 1%. If the engine coolant temperature is lower than the engine coolant temperature threshold, the engine is determined to be operating normally, and then step S600 is executed. S600. Cycle through steps S100 to S500 to control the engine's combustion and knocking to a normal state.

4. The gas engine knock control system according to claim 3, characterized in that: The intake manifold temperature threshold is 55°C.

5. The gas engine knock control system according to claim 4, characterized in that: The intake temperature adjustment step is such that for every 2°C above the intake manifold temperature threshold, the 6 ignition coils (9) are controlled to reduce the ignition angle by 1°.

6. The gas engine knock control system according to claim 5, characterized in that: The temperature threshold of the first exhaust manifold is 780°C.

7. The gas engine knock control system according to claim 6, characterized in that: The exhaust manifold pressure threshold is 400 kPa.

8. The gas engine knock control system according to claim 7, characterized in that: The second exhaust manifold temperature threshold is 55°C.

9. The gas engine knock control system according to claim 8, characterized in that: The exhaust temperature adjustment step is such that if the exhaust temperature is 2° lower than the second exhaust manifold temperature threshold, the ignition angle of the 6 ignition coils (9) is increased by 1°, and the increase in ignition angle does not exceed 3°.

10. The gas engine knock control system according to claim 9, characterized in that: The engine coolant temperature threshold is 95°C.

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