Flow control valve opening control method and system, engine, and engineering equipment

Abstract

The present invention provides a flow control valve opening control method and system, an engine, and an engineering equipment, which belong to the field of engines. The method includes: determining whether the flow control valve opening value required is increased or decreased according to the engine working condition; obtaining the actual opening value of the flow control valve; when the flow control valve opening value required is increased, and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the flow control valve opening value required is switched from the first rate to the second rate, and the second rate is less than the first rate; when the flow control valve opening value required is decreased, and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the flow control valve opening value required is switched from the third rate to the fourth rate, and the fourth rate is less than the third rate. The present invention can solve the problem of supercharger surge abnormal sound or flow control valve damage caused by excessively fast change of the flow control valve opening rate under specific working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a flow control valve opening control method and system, an engine, and engineering equipment. Background Art

[0002] Figure 1 It is a schematic diagram of the engine intake system. Figure 1 As shown, in the closed-loop control of the intake system, after the driver steps on the accelerator, the onboard computer (Electronic Control Unit, ECU) will determine the required fuel injection amount of the engine based on the engine speed and throttle opening, and then determine the required intake pressure. After the intake air is pressurized by the supercharger, it is cooled in the intercooler. At this time, the engine's intake pressure is relatively large relative to the required intake pressure, and the throttle valve is required to throttle the intake system to reduce the intake pressure. The intake temperature and pressure sensor combines the measured intake pressure and the required intake pressure for closed-loop control to determine the required opening of the throttle valve. At this time, the opening of the throttle valve will be adjusted according to the required opening.

[0003] In addition, in some specific operating conditions, such as: completely closing the throttle to idle condition, the engine monitoring the supercharger surging, the engine entering the flameout process, the throttle valve self-learning process after flameout, the cylinder brake exiting and entering the reverse drag process, etc., the throttle valve opening will also be adjusted accordingly. However, in the case of the above-mentioned operating conditions, in order to ensure the performance of the intake system, the supercharger will surge and make abnormal noises, or the throttle valve may be damaged. Summary of the invention

[0004] The present invention provides a flow control valve opening control method and system, an engine, and engineering equipment, which are used to solve the problem of supercharger surge noise or flow control valve damage caused by excessively fast flow control valve opening rate changes under specific working conditions.

[0005] In a first aspect, the present invention provides a method for controlling the opening of a flow control valve, comprising:

[0006] Determine a change trend of the required opening value of the flow control valve according to the engine operating condition, wherein the change trend includes increasing and decreasing;

[0007] Get the actual opening value of the flow control valve;

[0008] When the required opening value of the flow control valve increases, and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the required opening value of the flow control valve is switched from the first rate to the second rate, and the second rate is less than the first rate;

[0009] When the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the required opening value of the flow control valve is switched from the third rate to the fourth rate, and the fourth rate is less than the third rate.

[0010] Optionally, it also includes:

[0011] When the required opening value of the flow control valve increases and the actual opening value of the flow control valve is less than the first opening threshold, the change rate of the required opening value of the flow control valve is maintained at the first rate.

[0012] Optionally, it also includes:

[0013] When the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is greater than the second opening threshold, the change rate of the required opening value of the flow control valve is maintained at the third rate.

[0014] Optionally, determining the change trend of the required opening value of the flow control valve according to the engine operating condition specifically includes:

[0015] Get engine speed and throttle opening;

[0016] Determining the required intake pressure of the engine according to the engine speed and the throttle opening;

[0017] Get the actual intake pressure;

[0018] When the intake pressure required by the engine is greater than the actual intake pressure, the change trend of the required opening value of the flow control valve is increasing; when the intake pressure required by the engine is less than the actual intake pressure, the change trend of the required opening value of the flow control valve is decreasing.

[0019] Optionally, the first opening threshold is any value between 60% and 90%; and the second rate is any value between 30% / s and 100% / s.

[0020] Optionally, the second opening threshold is any value between 5% and 20%; and the fourth rate is any value between 30% / s and 100% / s.

[0021] In a second aspect, the present invention provides a flow control valve opening control system, comprising:

[0022] A required opening value acquisition module, used to determine a change trend of the required opening value of the flow control valve according to the engine operating conditions, wherein the change trend includes increasing and decreasing;

[0023] An actual opening value acquisition module is used to obtain the actual opening value of the flow control valve;

[0024] A first rate switching module, configured to switch the rate of change of the required opening value of the flow control valve from the first rate to the second rate when the required opening value of the flow control valve increases and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, wherein the second rate is less than the first rate;

[0025] The second rate switching module is used to switch the change rate of the required opening value of the flow control valve from the third rate to the fourth rate when the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, and the fourth rate is less than the third rate.

[0026] Optionally, it also includes:

[0027] A first rate maintaining module, configured to maintain a change rate of the required opening value of the flow control valve at the first rate when the required opening value of the flow control valve increases and the actual opening value of the flow control valve is less than the first opening threshold;

[0028] The second rate maintaining module is used to maintain the change rate of the required opening value of the flow control valve at the third rate when the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is greater than the second opening threshold.

[0029] In a third aspect, the present invention provides an engine, comprising a flow control valve and any one of the flow control valve opening control systems described above.

[0030] In a fourth aspect, the present invention provides an engineering equipment comprising any one of the engines described above.

[0031] The present invention provides a flow control valve opening control method and system, engine, and engineering equipment. The flow control valve required opening value change trend is determined by the engine working condition, and combined with the actual opening value of the flow control valve, when the flow control valve required opening value increases, and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the flow control valve required opening value is switched from the first rate to the second rate, and the second rate is less than the first rate; when the flow control valve required opening value decreases, and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the flow control valve required opening value is switched from the third rate to the fourth rate, and the fourth rate is less than the third rate. That is, the present invention slows down the opening change rate of the flow control valve under specific working conditions, thereby avoiding the problem of supercharger surge abnormal sound or throttle valve damage caused by too fast change in the opening rate of the flow control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced one by one below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the principle of the engine intake system in the prior art;

[0034] Figure 2 It is a flow chart of the flow control valve opening control method provided by the present invention;

[0035] Figure 3 is a schematic diagram of simulation results of an embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of the flow control valve opening control system provided by the present invention;

[0037] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Combine the following Figure 2-Figure 4 The invention describes a flow control valve opening control method and system, an engine, and engineering equipment.

[0040] Figure 2 is a flow chart of the flow control valve opening control method provided by the present invention, such as Figure 2 As shown, a flow control valve opening control method includes:

[0041] Step 201: Determine a change trend of a required opening value of a flow control valve according to an engine operating condition, wherein the change trend includes increasing and decreasing.

[0042] In some embodiments, the flow control valve is referred to as a throttle valve or a throttle valve.

[0043] In some embodiments, the change trend of the required opening value of the flow control valve is determined according to the engine operating condition, specifically by the following method:

[0044] Obtain the engine speed and throttle opening; determine the amount of fuel injection required by the engine based on the engine speed and throttle opening; then determine the intake pressure required by the engine based on the amount of fuel injection required by the engine; obtain the actual intake pressure; when the intake pressure required by the engine is greater than the actual intake pressure, the change trend of the required opening value of the flow control valve is increasing; when the intake pressure required by the engine is less than the actual intake pressure, the change trend of the required opening value of the flow control valve is decreasing.

[0045] Among them, when the change trend of the required opening value of the flow control valve is increasing, the corresponding engine operating conditions include: self-learning process after flameout, cylinder brake exit and entering the reverse drag process, sudden throttle reduction and entering the reverse drag process, and monitoring of engine surging, etc. When the change trend of the required opening value of the flow control valve is decreasing, the corresponding engine operating conditions include: clutching and requiring the throttle to be fully open or shifting and requiring the throttle to be fully open, self-learning process after flameout, sudden throttle pressing or flameout process, etc.

[0046] Step 202: Obtain the actual opening value of the flow control valve.

[0047] In some embodiments, the flow control valve is a throttle valve, and in this case, the actual opening value of the throttle valve is determined by a throttle valve opening sensor.

[0048] It should be pointed out that the types of the above-mentioned sensors and flow control valves are not limited to the types mentioned above. In practical applications, other types of sensors and flow control valves can be set according to specific needs, which are not listed here one by one.

[0049] Step 203: When the required opening value of the flow control valve increases and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the required opening value of the flow control valve is switched from the first rate to the second rate, and the second rate is less than the first rate.

[0050] In some embodiments, the first opening threshold is any value between 60% and 90%; the second rate is any value between 30% / s and 100% / s; the first rate is generally a default rate, and the value range of the first rate is generally above 800% / s.

[0051] The selection of the specific values ​​of the first opening threshold and the second rate is based on whether the engine has abnormal noise.

[0052] For example, if the required opening value of the flow control valve needs to change from 60% opening to 100% opening, the actual opening value is 60% at this time. If the first rate is 800% / s, when the rate is not slowed down, the time required for the flow control valve to open to 100% is: 40% / 800% / s=0.05s; when using the method of the present invention, if the first opening threshold is preset to 60% and the second rate is 30% / s, the time required for the flow control valve to open to 100% is: 40% / 30% / s=1.33s; it can be seen that the present invention slows down the opening change of the flow control valve.

[0053] Step 204: When the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the required opening value of the flow control valve is switched from the third rate to the fourth rate, and the fourth rate is less than the third rate.

[0054] In some embodiments, the second opening threshold is any value between 5% and 20%; the fourth rate is any value between 30% / s and 100% / s; the third rate is generally the default rate, and the value range of the third rate is generally above 800% / s.

[0055] The selection of specific values ​​of the second opening threshold and the fourth rate is based on whether the flow control valve seat can withstand the impact of the change in the opening of the flow control valve.

[0056] For example, if the required opening value of the flow control valve needs to change from 20% opening to 0% opening, the actual opening value is 20% at this time. If the third rate is 800% / s, when the rate is not slowed down, the time required for the flow control valve to close to 0% is: 20% / 800% / s=0.025s; when using the method of the present invention, if the preset second opening threshold is 20%, the second rate is 30% / s, the time required for the flow control valve to close to 0% is: 20% / 30% / s=0.67s; it can be seen that the present invention slows down the opening change of the flow control valve.

[0057] In addition, in some specific embodiments, when the required opening value of the flow control valve increases and the actual opening value of the flow control valve is less than the first opening threshold, the change rate of the required opening value of the flow control valve is maintained at the first rate.

[0058] The first opening threshold is any value between 60% and 90%; the first rate is generally a default rate, and the value range of the first rate is generally above 800% / s.

[0059] Furthermore, the selection of the specific value of the first opening threshold is based on whether the engine has abnormal noise.

[0060] In some specific embodiments, when the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is greater than the second opening threshold, the change rate of the required opening value of the flow control valve is maintained at the third rate.

[0061] The second opening threshold is any value between 5% and 20%; the third rate is generally a default rate, and the value range of the third rate is generally above 800% / s.

[0062] Furthermore, the selection of the specific value of the second opening threshold is based on whether the flow control valve seat can withstand the impact of the change in the opening of the flow control valve.

[0063] The above method of the present invention avoids the problem of supercharger surging abnormal noise or throttle valve damage caused by too fast opening rate change of the flow control valve by slowing down the opening rate change of the flow control valve under specific working conditions.

[0064] It should be noted that the same strategy of the present invention is applied to the control of the exhaust bypass valve and the variable area supercharger control valve, and has the same improvement effect.

[0065] In addition, the present invention also discloses the following technical effects:

[0066] When the actual opening value is less than the first opening threshold or the actual opening value is greater than the second opening threshold, the present invention will maintain the default change rate of the required opening value of the flow control valve without slowing down the rate, thus ensuring the power of the engine.

[0067] In summary, according to the embodiment provided by the present invention, the control process is simulated. Under certain working conditions, the change rate of the throttle valve or the throttle valve demand value is adjusted through the control strategy to obtain the throttle valve opening demand value after rate optimization. The simulation results are as follows: Figure 3 As shown, the horizontal axis is time, A1 is the first opening threshold, A2 is the second opening threshold, and the actual performance of the throttle valve is the actual opening value of the throttle valve. It can be seen that: when the throttle valve or throttle opening demand value increases, the actual opening does not perform rate optimization before it rises to A1 opening; the actual opening starts to slow down after it rises to A1 opening; when the throttle valve or throttle opening demand value decreases, the actual opening does not perform rate optimization before it drops to A2 opening; the actual opening starts to slow down after it drops to A2 opening.

[0068] The flow control valve opening control system provided by the present invention is described below. The flow control valve opening control system described below and the flow control valve opening control method described above can be referred to each other.

[0069] Figure 4Schematic diagram of the flow control valve opening control system provided by the present invention. Figure 4 As shown, a flow control valve opening control system includes:

[0070] The required opening value acquisition module 401 is used to determine the change trend of the required opening value of the flow control valve according to the engine working condition, and the change trend includes increasing and decreasing.

[0071] The actual opening value acquisition module 402 is used to acquire the actual opening value of the flow control valve.

[0072] The first rate switching module 403 is used to switch the rate of change of the required opening value of the flow control valve from the first rate to the second rate when the required opening value of the flow control valve increases and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, and the second rate is smaller than the first rate.

[0073] The second rate switching module 404 is used to switch the rate of change of the required opening value of the flow control valve from the third rate to the fourth rate when the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, and the fourth rate is less than the third rate.

[0074] In some specific embodiments, the flow control valve opening control system of the present invention may further include:

[0075] The first rate maintaining module is used to maintain the change rate of the required opening value of the flow control valve at the first rate when the required opening value of the flow control valve increases and the actual opening value of the flow control valve is less than the first opening threshold.

[0076] In some specific embodiments, the flow control valve opening control system of the present invention may further include:

[0077] The second rate maintaining module is used to maintain the change rate of the required opening value of the flow control valve at a third rate when the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is greater than the second opening threshold.

[0078] Based on the above system, the present invention also provides an engine, including a flow control valve and a flow control valve opening control system.

[0079] Based on the above engine, the present invention also provides an engineering equipment including the engine.

[0080] In some specific embodiments, the engineering equipment may include heavy trucks, trailers, excavators, anchor diggers, bulldozers, road rollers, concrete pump trucks and other working vehicles.

[0081] Figure 5An example of a physical structure diagram of an electronic device is shown in FIG. Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530 and a communication bus 540, wherein the processor 510, the communication interface 520 and the memory 530 communicate with each other through the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute the flow control valve opening control method, which includes:

[0082] The change trend of the required opening value of the flow control valve is determined according to the engine operating condition, and the change trend includes increasing and decreasing.

[0083] Get the actual opening value of the flow control valve.

[0084] When the required opening value of the flow control valve increases and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the required opening value of the flow control valve is switched from the first rate to the second rate, and the second rate is less than the first rate.

[0085] When the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the required opening value of the flow control valve is switched from the third rate to the fourth rate, and the fourth rate is less than the third rate.

[0086] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0087] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program, the computer program can be stored in a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute a flow control valve opening control method, the method comprising:

[0088] The change trend of the required opening value of the flow control valve is determined according to the engine operating condition, and the change trend includes increasing and decreasing.

[0089] Get the actual opening value of the flow control valve.

[0090] When the required opening value of the flow control valve increases and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the required opening value of the flow control valve is switched from the first rate to the second rate, and the second rate is less than the first rate.

[0091] When the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the required opening value of the flow control valve is switched from the third rate to the fourth rate, and the fourth rate is less than the third rate.

[0092] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method for controlling the opening of a flow control valve is implemented, the method comprising:

[0093] The change trend of the required opening value of the flow control valve is determined according to the engine operating condition, and the change trend includes increasing and decreasing.

[0094] Get the actual opening value of the flow control valve.

[0095] When the required opening value of the flow control valve increases and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the required opening value of the flow control valve is switched from the first rate to the second rate, and the second rate is less than the first rate.

[0096] When the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the required opening value of the flow control valve is switched from the third rate to the fourth rate, and the fourth rate is less than the third rate.

[0097] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0098] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flow control valve opening control method, It is characterized in that include: Determine a change trend of the required opening value of the flow control valve according to the engine operating condition, wherein the change trend includes increasing and decreasing; Get the actual opening value of the flow control valve; When the required opening value of the flow control valve increases, and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, the change rate of the required opening value of the flow control valve is switched from the first rate to the second rate, and the second rate is less than the first rate; When the required opening value of the flow control valve becomes smaller, and the actual opening value of the flow control valve is less than or equal to the second opening threshold, the change rate of the required opening value of the flow control valve is switched from the third rate to a fourth rate, and the fourth rate is less than the third rate; Determining the change trend of the required opening value of the flow control valve according to the engine operating condition specifically includes: Get engine speed and throttle opening; Determining the required intake pressure of the engine according to the engine speed and the throttle opening; Get the actual intake pressure; When the intake pressure required by the engine is greater than the actual intake pressure, the change trend of the required opening value of the flow control valve is increasing; when the intake pressure required by the engine is less than the actual intake pressure, the change trend of the required opening value of the flow control valve is decreasing.

2. The flow control valve opening control method according to claim 1, It is characterized in that Also includes: When the required opening value of the flow control valve increases and the actual opening value of the flow control valve is less than the first opening threshold, the change rate of the required opening value of the flow control valve is maintained at the first rate.

3. The flow control valve opening control method according to claim 1, It is characterized in that Also includes: When the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is greater than the second opening threshold, the change rate of the required opening value of the flow control valve is maintained at the third rate.

4. The flow control valve opening control method according to any one of claims 1 to 3, It is characterized in that The first opening threshold is any value between 60% and 90%; the second rate is any value between 30% / s and 100% / s.

5. The flow control valve opening control method according to any one of claims 1 to 3, It is characterized in that The second opening threshold is any value between 5% and 20%; the fourth rate is any value between 30% / s and 100% / s.

6. A flow control valve opening control system, It is characterized in that include: A required opening value acquisition module, used to determine a change trend of the required opening value of the flow control valve according to the engine operating conditions, wherein the change trend includes increasing and decreasing; An actual opening value acquisition module is used to obtain the actual opening value of the flow control valve; A first rate switching module, configured to switch the rate of change of the required opening value of the flow control valve from the first rate to the second rate when the required opening value of the flow control valve increases and the actual opening value of the flow control valve is greater than or equal to the first opening threshold, wherein the second rate is less than the first rate; A second rate switching module, configured to switch the rate of change of the required opening value of the flow control valve from the third rate to a fourth rate when the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is less than or equal to the second opening threshold, wherein the fourth rate is less than the third rate; The required opening value acquisition module is specifically used for: Get engine speed and throttle opening; Determining the required intake pressure of the engine according to the engine speed and the throttle opening; Get the actual intake pressure; When the intake pressure required by the engine is greater than the actual intake pressure, the change trend of the required opening value of the flow control valve is increasing; when the intake pressure required by the engine is less than the actual intake pressure, the change trend of the required opening value of the flow control valve is decreasing.

7. The flow control valve opening control system according to claim 6, It is characterized in that Also includes: A first rate maintaining module, configured to maintain a change rate of the required opening value of the flow control valve at the first rate when the required opening value of the flow control valve increases and the actual opening value of the flow control valve is less than the first opening threshold; The second rate maintaining module is used to maintain the change rate of the required opening value of the flow control valve at the third rate when the required opening value of the flow control valve becomes smaller and the actual opening value of the flow control valve is greater than the second opening threshold.

8. An engine, It is characterized in that It comprises a flow control valve and a flow control valve opening control system as claimed in claim 6 or 7.

9. An engineering equipment, It is characterized in that Comprising an engine as claimed in claim 8.

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