Internal combustion engine cylinder failure pump gas pressurization method and system, computer equipment and medium

Abstract

The invention relates to an internal combustion engine cylinder failure pump gas pressurization method and system, computer equipment and a medium, belongs to the technical field of engines, and solves the problems of low combustion efficiency of an engine, high fuel consumption of the internal combustion engine and pollutant emission in the compression and expansion process of a cylinder after the internal combustion engine cylinder failure. The method comprises the following steps: after the internal combustion engine enters a cylinder cut-off state, an exhaust valve of an oil cut-off cylinder is closed, and an air inlet valve is opened. The combustion efficiency of the internal combustion engine is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of engines, and in particular relates to a cylinder cut-off technology for an internal combustion engine. Background Art

[0002] High-efficiency internal combustion engines are indispensable power machines in my country's highway logistics, highway transportation, ocean transportation, national defense equipment and other fields. To improve the harmful emissions of internal combustion engines caused by the use of petroleum products, humans first insist on continuously innovating in improving comprehensive thermal efficiency and controlling emission technologies, thereby reducing fuel consumption and reducing harmful substances and carbon dioxide emissions. Another path is to develop new energy internal combustion engine products and expand broader application scenarios by choosing to use low-carbon clean fuels through energy transformation.

[0003] Cylinder cut-off technology, i.e. variable displacement technology, provides a good technical means for fuel saving and emission reduction. Its essence is that when the internal combustion engine is working under low load, a series of means are used, such as cutting off the fuel supply, intake and exhaust of some cylinders, to stop some cylinders from working, increase the load rate of the remaining cylinders, and make the internal combustion engine work under economic fuel consumption conditions, thereby improving fuel efficiency and reducing fuel consumption. However, when the engine is running in the cylinder cut-off state, if the original intake and exhaust valve control is maintained, the fresh air inhaled by the engine is discharged without being used, which not only occupies the intake of several other cylinders that are not cut off, but also consumes the engine power during the compression and expansion process of the cylinder after the cylinder is cut off, thereby reducing the efficiency of the engine. In order to eliminate the consumption of engine power during the compression and expansion process of the cylinder after the cylinder is cut off and improve the utilization rate of air, it is necessary to control the intake and exhaust valves of the cylinder after the cylinder is cut off.

[0004] Patent CN105781757A discloses a CNG (compressed natural gas) engine single cylinder self-inflation method, which uses a cut-off cylinder in the CNG engine as an inflation cylinder, and some or all of the remaining cylinders as power cylinders. Only natural gas is introduced into the inflation cylinder, so that the inflation cylinder acts as a piston compressor cylinder, and the civil natural gas is compressed and filled into a high-pressure CNG storage tank for use as a fuel for the car. The method and device can use civil natural gas to inflate CNG cars, with a small modification range, easy to implement, and does not affect the performance of the CNG engine. The invention uses the cut-off cylinder to store gas in the CNG gas tank, but does not involve a cut-off cylinder pump gas pressurization method for pressurizing the intake pipe.

[0005] Patent CN113931732A discloses an intake boost system and control method suitable for cylinder deactivation technology, the system includes a first boost assembly and a second boost assembly, the first boost assembly includes a supercharger arranged on the engine intake pipe, the supercharger is driven by the exhaust gas discharged from the engine to compress the air entering the engine; the second boost assembly includes an electric supercharger and an air storage tank, the electric supercharger is arranged at the front end of the supercharger to compress the air in front of the supercharger, and the air storage tank is arranged on the intake pipe between the supercharger and the engine to introduce the air stored in itself into the intake pipe. The invention can effectively avoid the occurrence of phenomena such as slow boost response, insufficient intake air volume, and supercharger surge overspeed, and ensure the normal operation of the engine during cylinder deactivation or cylinder boosting. The invention uses an external boost assembly to complete the intake pipe boosting, and does not involve a cylinder pump air boosting method using cylinder deactivation boosting.

[0006] Patent CN114961917A provides a rocker arm valve control mechanism and an engine for dynamic cylinder deactivation. The device can control the intake and exhaust valves of some cylinders to switch to a closed state as needed, realize the cylinder deactivation function, make other cylinders work in the best working state, and achieve the purpose of energy saving and emission reduction. The invention uses a device to control the intake and exhaust valves of the cylinders that are deactivated, but does not involve a deactivated cylinder pumping gas pressurization method.

[0007] Therefore, there is an urgent need for a method for pumping air to boost pressure in an internal combustion engine when the cylinder is cut off, so as to reduce the consumption of engine power during the compression and expansion process of the cylinder after the cylinder is cut off as much as possible, so as to achieve the purpose of improving the efficiency of the internal combustion engine. Summary of the invention

[0008] The present invention aims to solve the problem that after the internal combustion engine is cut off from the cylinder, the compression and expansion process of the cylinder causes the engine combustion efficiency to decrease, the internal combustion engine fuel consumption to increase, and pollutant emissions. A method, device, computer equipment and medium for pumping air when the internal combustion engine is cut off from the cylinder are proposed.

[0009] The method comprises:

[0010] When the internal combustion engine enters the cylinder cut-off state, the exhaust valve of the cylinder that is cut off from fuel is kept closed and the intake valve is opened;

[0011] Further, a preferred solution is provided: when the internal combustion engine enters the cylinder cut-off state from the full-cylinder state, the method further comprises: when the operating condition of the internal combustion engine satisfies the cylinder cut-off operating state, the internal combustion engine enters the cylinder cut-off state, otherwise exits the cylinder cut-off state;

[0012] Furthermore, a preferred solution is provided: when the number of cylinders of the internal combustion engine that are cut off is a fixed value m, the method further comprises: controlling the m cylinders to stop injecting fuel; when the operating point of the internal combustion engine exceeds the cylinder cut-off operating range, the internal combustion engine exits the cylinder cut-off state;

[0013] Furthermore, a preferred solution is provided: the gear-off operation range is specifically as follows: the internal combustion engine only needs to operate less than all cylinders to meet the power output required by the target operating point.

[0014] Furthermore, a preferred solution is provided: when there are several situations in which the number of cylinders cut off in the internal combustion engine is different, the method further comprises:

[0015] Obtaining an operating condition point of the internal combustion engine, and determining the number n of cylinders that need to be cut off in the internal combustion engine according to the operating condition point;

[0016] Cut off the oil supply to n cylinders and enter the cylinder cut-off state;

[0017] Further, a preferred solution is provided: determining whether the operating point of the internal combustion engine has changed, and when the operating point of the internal combustion engine has changed and is within the cylinder cut-off operation range, updating the operating state; when the operating point of the internal combustion engine has not changed, keeping the operating state of the internal combustion engine unchanged;

[0018] Furthermore, a preferred solution is provided: the updating of the working state is specifically: obtaining a target operating point of the internal combustion engine, and adjusting the number of cylinder cutoffs according to the target operating point.

[0019] The present invention also provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes a method for pumping air into the cylinder of an internal combustion engine according to any combination of the above-mentioned schemes.

[0020] The present invention also provides a computer-readable storage medium, wherein the storage medium is used to store a computer program, wherein the computer program executes a method for pumping air into and boosting cylinders in an internal combustion engine as described in any combination of the above-mentioned schemes.

[0021] The present invention also provides an internal combustion engine cylinder cut-off pump air pressure boosting system, the system comprising:

[0022] Valve control module: used to keep the exhaust valve of the cylinder with fuel cut off closed and the intake valve open after the internal combustion engine enters the cylinder cut-off state.

[0023] The internal combustion engine cylinder cut-off pumping air pressurization method proposed in the present invention enables the internal combustion engine to increase the air pressure in the intake pipe by controlling the opening and closing of the intake and exhaust valves when the cylinder is cut off, thereby improving the combustion efficiency of the engine, reducing the fuel consumption and pollutant emissions of the internal combustion engine, and improving fuel utilization and economic benefits.

[0024] After the internal combustion engine using the method proposed by the present invention enters the cylinder cut-off operation state, for the cylinders that need to be cut off from fuel, the exhaust valve is kept closed and the intake valve is opened. In this way, each cylinder that is cut off from fuel plays the role of an air pump. It sucks in fresh air from the intake pipe and then pumps it into the intake pipe. In this way, the air obtained from the intake pipe is fully utilized, avoiding the waste of intake air.

[0025] At the same time, when other cylinders inhale air from the intake pipe, the cylinder with oil cut-off pumps air back into the intake pipe, increasing the air pressure in the intake pipe and realizing cylinder cut-off air pumping and pressurization. This method utilizes the working cycle of each cylinder and increases the air pressure and density in the intake pipe through precise valve control. Such a control method can effectively eliminate the negative impact of cylinder cut-off on the power of the internal combustion engine, improve combustion efficiency, and enhance the performance of the internal combustion engine. This method is simple to operate, not only saves energy, but also reduces the generation of emissions, which meets the goals of environmental protection and sustainable development.

[0026] The invention is suitable for improving the combustion efficiency of an internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of a method for pumping gas to supercharge an internal combustion engine by cutting off a cylinder according to the second embodiment;

[0028] Figure 2 A flow chart of the internal combustion engine cylinder deactivation pumping gas boosting with only one fixed cylinder deactivation number as described in the third embodiment;

[0029] Figure 3 This is a flow chart of cylinder deactivation pumping gas boosting for an internal combustion engine with multiple cylinder deactivation numbers as described in the fourth embodiment. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. 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.

[0031] Implementation Method 1

[0032] The present embodiment provides a method for pumping air and boosting in a cylinder cut-off state of an internal combustion engine, comprising: when the internal combustion engine enters a cylinder cut-off state, the exhaust valve of the cylinder cut off from fuel is kept closed, and the intake valve is opened.

[0033] Specifically:

[0034] The internal combustion engine using this method requires that the intake valve and the exhaust valve can be independently controlled to open and close. When the internal combustion engine enters the cylinder cut-off operation state, for the cylinder that needs to be cut off from fuel, the exhaust valve is kept closed and the intake valve is opened. In this way, each cylinder with cut-off from fuel plays the role of an air pump. The cylinder inhales fresh air from the intake pipe and then pumps it into the intake pipe. In this way, the air obtained from the intake pipe is fully utilized, avoiding the waste of intake air.

[0035] At the same time, when other cylinders inhale air from the intake pipe, the cylinder with oil cut-off pumps air back into the intake pipe, increasing the air pressure in the intake pipe and realizing cylinder cut-off air pumping and pressurization. This method utilizes the working cycle of each cylinder and increases the air pressure and density in the intake pipe through precise valve control. Such a control method can effectively eliminate the negative impact of cylinder cut-off on the power of the internal combustion engine, improve combustion efficiency, and enhance the performance of the internal combustion engine. This method is not only simple to operate, but also saves energy and reduces the generation of emissions, which meets the goals of environmental protection and sustainable development.

[0036] Implementation Method 2

[0037] Reference Figure 1 This embodiment will be described.

[0038] This embodiment is a further example of the internal combustion engine cylinder deactivation pumping gas boosting method described in the first embodiment.

[0039] When the internal combustion engine enters the cylinder cut-off state from the full-cylinder state, the method further includes: when the operating conditions of the internal combustion engine meet the cylinder cut-off operating state, the internal combustion engine enters the cylinder cut-off state, otherwise the internal combustion engine exits the cylinder cut-off state.

[0040] Specifically:

[0041] like Figure 1 As shown, when the internal combustion engine enters the cylinder cut-off mode from the full-cylinder mode:

[0042] Step 1: When the internal combustion engine monitoring system detects that the internal combustion engine is in a condition that allows cylinder cut-off operation, the internal combustion engine monitoring system enters cylinder cut-off mode. In cylinder cut-off mode, it is normal for the injection system of the cut-off cylinder to not work and for the intake valve to be normally open and the exhaust valve to be normally closed, avoiding false alarms caused by the inoperative injection system of the cut-off cylinder and the opening and closing of the intake and exhaust valves.

[0043] Step 2: The internal combustion engine monitoring system controls the fuel injection system and the valve train to put the internal combustion engine into a cylinder cut-off operation state, thereby achieving cylinder cut-off pumping and air pressurization.

[0044] Step 3: If the operating conditions of the internal combustion engine do not meet the cylinder cut-off operating state, the internal combustion engine monitoring system exits the cylinder cut-off mode, restores the injection system and the valve system, and the internal combustion engine resumes the full-cylinder operating state.

[0045] Implementation Method 3

[0046] Reference Figure 2 This embodiment will be described.

[0047] This embodiment is a further example of the internal combustion engine cylinder deactivation pumping gas boosting method described in the first embodiment.

[0048] When the number of cylinders of the internal combustion engine that are cut off is a fixed value m, the method further includes: controlling the m cylinders to stop injecting fuel; when the operating point of the internal combustion engine exceeds the cylinder cut-off operating range, the internal combustion engine exits the cylinder cut-off state.

[0049] The cylinder cut-off operation range is specifically: the internal combustion engine only needs to operate some cylinders to meet the power output required by the target operating point.

[0050] Specifically:

[0051] If the cylinder cut-off operation of the internal combustion engine has only one fixed cylinder number m, when the internal combustion engine enters the cylinder cut-off mode from the full-cylinder mode, and when the internal combustion engine needs to accelerate or decelerate after the cylinder cut-off, that is, when the operating point changes, the use of the cylinder cut-off pumping gas boosting method has the following steps:

[0052] S1: When the internal combustion engine monitoring system detects that the internal combustion engine is in a condition that allows cylinder cut-off operation, the internal combustion engine monitoring system enters cylinder cut-off mode. In cylinder cut-off mode, it is normal for the injection system of the cut-off cylinder to not work and for the intake valve to be normally open and the exhaust valve to be normally closed, which avoids false alarms caused by the inoperative injection system of the cut-off cylinder and the opening and closing of the intake and exhaust valves.

[0053] S2: The internal combustion engine monitoring system controls the fuel injection systems of m cylinders to stop injecting fuel, and the intake valves of the m cylinders remain open and the exhaust valves remain closed, so that the internal combustion engine enters the cylinder cut-off operation state and realizes cylinder cut-off pumping and pressurization.

[0054] S3: The internal combustion engine monitoring system detects whether the operating point of the internal combustion engine exceeds the cylinder cut-off operation range. If so, it enters S4, otherwise it repeats S3.

[0055] S4: The internal combustion engine monitoring system exits the cylinder cut-off mode, restores the fuel injection system and the valve train, and the internal combustion engine resumes full-cylinder operation.

[0056] Implementation Method 4

[0057] Reference Figure 3 Description of this embodiment

[0058] This embodiment is a further example of the internal combustion engine cylinder deactivation pumping gas boosting method described in the first embodiment.

[0059] When there are several situations in which the number of cylinders cut off in the internal combustion engine is different, the method further comprises:

[0060] Obtaining an operating condition point of the internal combustion engine, and determining the number n of cylinders that need to be cut off in the internal combustion engine according to the operating condition point;

[0061] Cut off the oil supply to n cylinders and enter the cylinder cut-off state.

[0062] Determine whether the operating point of the internal combustion engine has changed. When the operating point of the internal combustion engine has changed and is within the cylinder cut-off operation range, update the working state; when the operating point of the internal combustion engine remains unchanged, keep the working state of the internal combustion engine unchanged.

[0063] The updating working state specifically includes: obtaining a target operating point of the internal combustion engine, and adjusting the number of cylinder cutoffs according to the target operating point.

[0064] Specifically:

[0065] If the cylinder cut-off operation of the internal combustion engine has multiple cylinder cut-off numbers, when the internal combustion engine enters the cylinder cut-off mode from the full-cylinder mode, and when the internal combustion engine needs to accelerate or decelerate after the cylinder cut-off, that is, when the operating point changes, the use of the cylinder cut-off pumping gas boosting method has the following steps:

[0066] a. When the internal combustion engine monitoring system detects that the internal combustion engine is in a condition that allows cylinder cut-off operation, the internal combustion engine monitoring system enters cylinder cut-off mode. In cylinder cut-off mode, it is normal for the injection system of the cut-off cylinder to not work and for the intake valve to be normally open and the exhaust valve to be normally closed, which avoids false alarms caused by the inoperative injection system of the cut-off cylinder and the opening and closing of the intake and exhaust valves.

[0067] b. Obtain the operating condition point of the internal combustion engine through the internal combustion engine monitoring system, and determine the number n of cylinders that need to be cut off according to the operating condition point.

[0068] c. The internal combustion engine stops supplying fuel to n cylinders, and the internal combustion engine enters a cylinder cut-off operating state, and the exhaust valves of these n cylinders remain closed and the intake valves remain open, thereby achieving cylinder cut-off pumping and pressurization.

[0069] d. The internal combustion engine monitoring system detects whether the operating point of the internal combustion engine has changed. If so, the process proceeds to step e, otherwise, step d is repeated.

[0070] e. If the changed internal combustion engine operating point is still within the operating range that can be provided in the cylinder cut-off mode, proceed to step f; otherwise, proceed to step g.

[0071] f. Based on the target operating point, if the power output needs to be increased, the internal combustion engine monitoring system will update the working status of the fuel injection system and the valve system, and reduce the number of cut-off cylinders. If the power output needs to be reduced, the internal combustion engine monitoring system will update the working status of the fuel injection system and the valve system, increase the number of cut-off cylinders, and the internal combustion engine will enter a lower load cylinder cut-off operating state, ultimately matching the target operating point of the internal combustion engine.

[0072] g. The internal combustion engine monitoring system exits the cylinder cut-off mode and sends instructions to the fuel injection system and the valve distribution system to restore the fuel supply and valve distribution to all cylinders and enter the full-cylinder working mode.

[0073] Implementation Method 5

[0074] An internal combustion engine cylinder cut-off pump air boosting system, comprising:

[0075] The valve control module is used to keep the exhaust valve of the cylinder with fuel cut off closed and the intake valve open after the internal combustion engine enters the cylinder cut-off state.

Claims

1. A method for boosting the internal combustion engine by pumping air during cylinder deactivation, characterized in that: The method comprises: when the internal combustion engine enters a cylinder cut-off state, keeping the exhaust valve of the cylinder cut off from fuel closed and the intake valve open.

2. The internal combustion engine cylinder deactivation pumping gas supercharging method according to claim 1, characterized in that: When the internal combustion engine enters the cylinder cut-off state from the full-cylinder state, the method further includes: when the operating conditions of the internal combustion engine meet the cylinder cut-off operating state, the internal combustion engine enters the cylinder cut-off state, otherwise the internal combustion engine exits the cylinder cut-off state.

3. The internal combustion engine cylinder deactivation pumping gas supercharging method according to claim 1, characterized in that: When the number of cylinders of the internal combustion engine that are cut off is a fixed value m, the method further includes: controlling the m cylinders to stop injecting fuel; when the operating point of the internal combustion engine exceeds the cylinder cut-off operating range, the internal combustion engine exits the cylinder cut-off state.

4. The internal combustion engine cylinder deactivation pumping gas supercharging method according to claim 3, characterized in that: The cylinder cut-off operation range is specifically: the internal combustion engine only needs to operate less than all cylinders to meet the power output required by the target operating point.

5. The internal combustion engine cylinder deactivation pumping gas supercharging method according to claim 1, characterized in that: When there are several situations in which the number of cylinders cut off in the internal combustion engine is different, the method further comprises: Obtaining an operating condition point of the internal combustion engine, and determining the number n of cylinders that need to be cut off in the internal combustion engine according to the operating condition point; Cut off the oil supply to n cylinders and enter the cylinder cut-off state.

6. The internal combustion engine cylinder deactivation pumping gas supercharging method according to claim 5, characterized in that: The method further comprises: Determine whether the operating point of the internal combustion engine has changed. When the operating point of the internal combustion engine has changed and is within the cylinder cut-off operation range, update the working state; when the operating point of the internal combustion engine remains unchanged, keep the working state of the internal combustion engine unchanged.

7. The internal combustion engine cylinder deactivation pumping gas supercharging method according to claim 6, characterized in that: The updating working state specifically includes: obtaining a target operating point of the internal combustion engine, and adjusting the number of cylinder cutoffs according to the target operating point.

8. A computer device, characterized in that: The computer device includes a memory and a processor, wherein the memory stores a computer program. When the processor runs the computer program stored in the memory, the processor executes a method for pumping air into the cylinder of an internal combustion engine according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The storage medium is used to store a computer program, and the computer program executes the internal combustion engine cylinder deactivation pumping gas boosting method as described in any one of claims 1-7.

10. An internal combustion engine cylinder deactivation pump air boost system, characterized in that: The system comprises: Valve control module: used to keep the exhaust valve of the cylinder with fuel cut off closed and the intake valve open after the internal combustion engine enters the cylinder cut-off state.

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