Control method, device and module for oil inlet pressure of supercharger and engine

Abstract

The invention discloses a supercharger oil inlet pressure control method, device and module and an engine. The method comprises the steps that the current working condition of the engine is determined according to the rotating speed of the engine; when it is determined that the current working condition of the engine is the post-lubrication working condition, after a first preset time period, an electromagnetic valve is controlled to be opened, and meanwhile the state of the engine is continuously monitored within a second preset time period after the electromagnetic valve is opened; when it is monitored that the rotating speed of the engine is 0, the oil inlet pressure of the supercharger is monitored synchronously and compared with the preset alarm pressure; when the oil inlet pressure of the supercharger is larger than the preset alarm pressure, an alarm prompt is given out; and after the electromagnetic valve is opened for a second preset time period, the electromagnetic valve is controlled to be closed. The oil pressure requirement of the supercharger under different use working conditions can be met, so that the reliability of the supercharger is improved, and the service life of the supercharger is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to a method, device, module and engine for controlling the oil inlet pressure of a supercharger. Background Art

[0002] Pre-lubrication is to supply lubricating oil to the supercharger before the engine starts, to ensure that the mating parts of the rotating parts of the supercharger are filled with lubricating oil. Post-lubrication is to supply lubricating oil to the supercharger after the engine stops, to ensure that the rotating parts are fully lubricated and cooled, to avoid dry friction and overheating, and to protect the supercharger. For different operating conditions, the supercharger has different oil pressure range requirements, and the oil pressure ranges in normal operating conditions and pre-lubrication / post-lubrication conditions vary greatly.

[0003] Existing engines usually use a standby pump for pre-lubrication / post-lubrication, which can save costs. However, due to the excessive flow rate of the standby pump, the oil pressure for pre-lubrication / post-lubrication of the supercharger exceeds the limit, thereby reducing the service life of the supercharger. Summary of the Invention

[0004] The present invention provides a method, device, module and engine for controlling the oil inlet pressure of a supercharger, which can meet the oil pressure requirements of the supercharger under different operating conditions, thereby improving the reliability and service life of the supercharger.

[0005] In a first aspect, an embodiment of the present invention provides a method for controlling the oil inlet pressure of a supercharger, applicable to an engine including a supercharger, a belt-driven pump, a standby pump, an oil sump and a control module for the oil inlet pressure of the supercharger. The belt-driven pump and the standby pump are arranged in parallel between the oil sump and the supercharger; the control module for the oil inlet pressure of the supercharger includes: a pressure relief valve, a solenoid valve, an orifice plate and a switching valve; the pressure relief valve, the orifice plate and the switching valve are sequentially connected in series between the oil sump and the supercharger; a first end of the solenoid valve is connected to the pressure relief valve, and a second end of the solenoid valve is connected to the oil sump;

[0006] The method for controlling the oil inlet pressure of the supercharger includes:

[0007] Determine the current operating condition of the engine according to the engine speed;

[0008] When it is determined that the current operating condition of the engine is a post-lubrication condition, after a first preset time period, control the solenoid valve to open, and at the same time continuously monitor the engine state within a second preset time period after the solenoid valve is opened;

[0009] When the engine speed is monitored to be 0, synchronously monitor the oil inlet pressure of the supercharger and compare it with a preset alarm pressure;

[0010] When the oil inlet pressure of the supercharger is greater than the preset alarm pressure, an alarm prompt is issued;

[0011] After the solenoid valve is opened for a second preset time period, control the solenoid valve to close.

[0012] Optionally, the determining the current working condition of the engine according to the engine speed includes:

[0013] Obtain the current speed of the engine;

[0014] When the obtained current speed of the engine is 0, determine that the engine has stopped, and record the current time as the stop time;

[0015] Read the engine speed data for a third preset time period before the stop time;

[0016] If the engine speed read for the third preset time period before the stop time is not zero, determine that the current working condition of the engine is the post-lubrication working condition;

[0017] If the engine speed read for the third preset time period before the stop time is zero, determine that the current working condition of the engine is the pre-lubrication working condition.

[0018] Optionally, after the step of if the engine speed read for the third preset time period before the stop time is zero, determine that the current working condition of the engine is the pre-lubrication working condition, further includes:

[0019] When it is determined that the current working condition of the engine is the pre-lubrication working condition, control the solenoid valve to open, synchronously monitor the oil inlet pressure of the supercharger, and compare it with the preset alarm pressure;

[0020] When the oil inlet pressure of the supercharger is greater than the preset alarm pressure, an alarm prompt is issued;

[0021] When it is monitored that the engine speed is greater than 0, control the solenoid valve to close.

[0022] Optionally, after the step of when it is determined that the current working condition of the engine is the post-lubrication working condition, after controlling the solenoid valve to open after a first preset time period and continuously monitoring the engine state within a second preset time period after the solenoid valve is opened, further includes:

[0023] When it is monitored that the engine speed is greater than 0, control the solenoid valve to close.

[0024] In a second aspect, an embodiment of the present invention further provides a control device for the oil inlet pressure of a supercharger, including:

[0025] A current working condition determination module, configured to determine the current working condition of the engine according to the engine speed;

[0026] A solenoid valve control and engine state monitoring module, configured to, when the current working condition determination module determines that the current working condition of the engine is a post-lubrication working condition, control the solenoid valve to open after a first preset time period, and continuously monitor the engine state within a second preset time period after the solenoid valve is opened;

[0027] An inlet oil pressure monitoring and comparison module, configured to, when the solenoid valve control and engine state monitoring module monitors that the engine speed is 0, synchronously monitor the inlet oil pressure of the supercharger and compare it with a preset alarm pressure;

[0028] An alarm prompt module, configured to issue an alarm prompt when the inlet oil pressure monitoring and comparison module determines that the inlet oil pressure of the supercharger is greater than the preset alarm pressure;

[0029] The solenoid valve control and engine state monitoring module is further configured to control the solenoid valve to close within the second preset time period after the solenoid valve is opened.

[0030] Optionally, the current working condition determination module includes:

[0031] An engine speed acquisition unit, configured to acquire the current speed of the engine;

[0032] A shutdown moment recording unit, configured to, when the current speed of the engine acquired by the engine speed acquisition unit is 0, determine that the engine has shut down and record the current time period as the shutdown moment;

[0033] A speed data reading unit, configured to read the engine speed data in a third preset time period before the shutdown moment;

[0034] A working condition determination unit, configured to, if the speed data reading unit reads that there is engine speed data in the third preset time period before the shutdown moment, determine that the current working condition of the engine is a post-lubrication working condition;

[0035] The working condition determination unit is further configured to, if the speed data reading unit reads that there is no engine speed data in the third preset time period before the shutdown moment, determine that the current working condition of the engine is a pre-lubrication working condition.

[0036] In a third aspect, an embodiment of the present invention further provides a control module for the inlet oil pressure of a supercharger, applicable to an engine including a supercharger, a belt-driven pump, a standby pump, and an oil sump, where the belt-driven pump and the standby pump are arranged in parallel between the oil sump and the supercharger; characterized in that the control module for the inlet oil pressure of the supercharger includes: a pressure relief valve, a solenoid valve, an orifice plate, and a switching valve;

[0037] The pressure relief valve, the orifice plate, and the on-off valve are sequentially connected in series between the oil pan and the engine; the first end of the solenoid valve is connected to the pressure relief valve, and the second end of the solenoid valve is connected to the oil pan;

[0038] When the engine speed is greater than 0, the engine-driven pump is turned on and the standby pump is turned off; in the pre-lubrication and post-lubrication conditions, the engine-driven pump is turned off, the standby pump is turned on, and the solenoid valve and the pressure relief valve are turned on; in the extreme condition where the standby pump supplies the engine for operation, the on-off valve is turned off; the orifice plate is used to adjust the overall resistance of the pipeline of the control module for the supercharger inlet oil pressure.

[0039] Optionally, it further includes: a first one-way valve and a second one-way valve;

[0040] The input end of the first one-way valve is connected to the engine-driven pump, and the output end of the first one-way valve is connected to the engine;

[0041] The input end of the second one-way valve is connected to the standby pump, and the output end of the second one-way valve is connected to the output end of the first one-way valve.

[0042] Optionally, it further includes: an oil inlet port assembly, an oil discharge port assembly, a high-pressure part assembly of the control oil circuit, a low-pressure part assembly of the control oil circuit, and mounting bolts;

[0043] The oil inlet port assembly and the oil discharge port assembly are fixed on the pressure relief valve, and the orifice plate is installed between the pressure relief valve and the oil inlet port assembly;

[0044] The solenoid valve, the high-pressure part assembly of the control oil circuit, and the low-pressure part assembly of the control oil circuit form a control oil circuit and are fixed to the engine through the mounting bolts.

[0045] In a fourth aspect, an embodiment of the present invention further provides an engine, including the control module for the supercharger inlet oil pressure, a supercharger, an engine-driven pump, a standby pump, and an oil pan according to any one of the embodiments of the third aspect.

[0046] An embodiment of the present invention provides a method, device, module and engine for controlling the oil inlet pressure of a supercharger. The method includes: determining the current working condition of the engine according to the engine speed; when it is determined that the current working condition of the engine is the post-lubrication working condition, after a first preset time period, controlling the solenoid valve to open, and continuously monitoring the engine state within a second preset time period after the solenoid valve is opened; when the engine speed is monitored to be 0, synchronously monitoring the oil inlet pressure of the supercharger and comparing it with a preset alarm pressure; when the oil inlet pressure of the supercharger is greater than the preset alarm pressure, sending an alarm prompt; after the second preset time period after the solenoid valve is opened, controlling the solenoid valve to close. The method of the present invention relies on the existing configuration of the engine and combines the control module of the oil inlet pressure of the supercharger. Without the need to additionally increase a pre-feed pump, the problem of over-limit oil pressure of the supercharger can be solved, the oil inlet pressure requirement of the supercharger can be met, and the comprehensive cost is lower than the solution equipped with a pre-feed pump, and the cost performance is higher. The solenoid valve is controlled to close through the set logic without human participation, and the automation degree of the engine is higher.

[0047] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 is a schematic structural diagram of an engine in the prior art;

[0050] Figure 2 is a schematic structural diagram of an engine provided by an embodiment of the present invention;

[0051] Figure 3 is a flowchart of a method for controlling the oil inlet pressure of a supercharger provided by an embodiment of the present invention;

[0052] Figure 4 is a flowchart of another method for controlling the oil inlet pressure of a supercharger provided by an embodiment of the present invention;

[0053] Figure 5 is a schematic structural diagram of a device for controlling the oil inlet pressure of a supercharger provided by an embodiment of the present invention;

[0054] Figure 6 is a schematic structural diagram of a current working condition determination module provided by an embodiment of the present invention;

[0055] Figure 7 It is a schematic structural diagram of a control module for the oil inlet pressure of a supercharger provided by an embodiment of the present invention. Specific implementation manners

[0056] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0058] Figure 1 It is a schematic structural diagram of an engine in the prior art. Refer to Figure 1 , the engine in the prior art includes a supercharger 110, a belt-driven pump 120, a standby pump 130, a pre-feed pump 140, and an oil pan 150. This prior art uses three devices, namely the belt-driven pump 120, the standby pump 130, and the pre-feed pump 140, connected in parallel to supply oil to the supercharger 110. For different working conditions, different pumps are selected to supply oil. During pre-lubrication and post-lubrication, the engine uses the separate pre-feed pump 140 to supply oil, which can meet the working requirements of low oil pressure of the supercharger 110 during pre-lubrication / post-lubrication. However, since three oil pumps are equipped, the cost of the engine is high and the cost performance is low.

[0059] In some marine engine applications, a standby pump is used to function as a pre-feed pump. Since the flow rate of the standby pump is much larger than that of the pre-feed pump, during pre-lubrication and post-lubrication conditions, the oil inlet pressure of the turbocharger is higher than the required limit value, which may lead to reliability failures of the turbocharger and shorten its service life. For most turbochargers, a piston ring is usually used to seal between the turbine end rotor and the bearing housing. When the engine is working, on one side of the piston ring at the turbine end is the high-pressure exhaust gas, and on the other side is the internal lubricating oil passage. Under high lubricating oil pressure, the exhaust gas and the lubricating oil can reach a gas-oil pressure balance at the piston ring. During pre-lubrication and post-lubrication, the engine is not working and cannot generate high-pressure exhaust gas. If the lubricating oil pressure is still high at this time, it is easy to break the gas-oil pressure balance, causing the lubricating oil to enter the piston ring at the turbine end. Under the action of high temperature, the lubricating oil will coke and deteriorate. After long-term accumulation, the turbocharger will experience a jamming and non-rotating failure. For most engines, the standby pump is usually driven by a fixed-frequency motor. Using the standby pump during pre-lubrication and post-lubrication conditions will supply a large amount of lubricating oil to the engine, thus forming a relatively high lubricating oil pressure. However, for the turbocharger, a lower lubricating oil pressure is required at this time.

[0060] In order to meet the oil pressure requirements of the turbocharger under different operating conditions and improve the reliability and service life of the turbocharger, the embodiments of the present invention provide a control method, device, module and engine for the oil inlet pressure of the turbocharger. Figure 2 FIG. is a schematic structural diagram of an engine provided by an embodiment of the present invention. Figure 3 FIG. is a flowchart of a control method for the oil inlet pressure of a turbocharger provided by an embodiment of the present invention. This method is applicable to Figure 2 an engine including a turbocharger 110, a belt-driven pump 120, a standby pump 130, an oil sump 150, and a control module 200 for the oil inlet pressure of the turbocharger. The belt-driven pump 120 and the standby pump 130 are arranged in parallel between the oil sump 150 and the turbocharger 110. The control module 200 for the oil inlet pressure of the turbocharger includes: a pressure relief valve 210, a solenoid valve 220, an orifice plate 230, and a switching valve 240. The pressure relief valve 210, the orifice plate 230, and the switching valve 240 are sequentially connected in series between the oil sump 150 and the turbocharger 110. The first end of the solenoid valve 220 is connected to the pressure relief valve 210, and the second end of the solenoid valve 220 is connected to the oil sump 150.

[0061] Refer to Figure 3 , the control method for the oil inlet pressure of the turbocharger includes the following steps:

[0062] S310. Determine the current operating condition of the engine according to the engine speed.

[0063] Specifically, in this embodiment, by reading the engine speed, the current operating condition of the engine can be judged, and separate control logics are set for different operating conditions.

[0064] S320. When it is determined that the current operating condition of the engine is the post-lubrication condition, after a first preset time period, control the solenoid valve to open, and at the same time, continuously monitor the engine state within a second preset time period after the solenoid valve opens.

[0065] It can be understood that in the post-lubrication condition, after the timer delays for the first preset time period, the control device will output an electrical signal to the solenoid valve. At this time, the solenoid valve opens, and at the same time, the timer is started. The engine state will be continuously monitored within the second preset time period.

[0066] It should be noted that in the post-lubrication condition, the first preset time period delayed by the timer and the second preset time period timed by the timer are determined based on bench test data and user usage habits. Delaying the first preset time period by the timer can ensure that when the engine is restarted repeatedly within a short shutdown time, the control method in the post-lubrication condition will not be accidentally triggered, ensuring the safety of the engine during normal startup. The second preset time period timed by the timer can be adjusted to adapt to the requirements of the low oil inlet time of the supercharger during pre-lubrication and post-lubrication of different types of superchargers.

[0067] S330. When it is monitored that the engine speed is 0, synchronously monitor the oil inlet pressure of the supercharger and compare it with the preset alarm pressure.

[0068] It can be understood that if the engine speed remains 0 all the time, it means that the engine is in a shutdown state all the time. Then, the oil inlet pressure of the supercharger will be synchronously monitored and compared with the preset alarm pressure set in advance for judgment.

[0069] S340. When the oil inlet pressure of the supercharger is greater than the preset alarm pressure, issue an alarm prompt.

[0070] Specifically, when the oil inlet pressure of the supercharger is greater than the preset alarm pressure, an alarm will be given on the remote control panel of the engine, and the staff will be prompted to check the state of the solenoid valve.

[0071] S350. After the second preset time period after the solenoid valve opens, control the solenoid valve to close.

[0072] The embodiment of the present invention relies on the existing configuration of the engine and combines the control module of the oil inlet pressure of the supercharger. Without the need to additionally add a pre-feed pump, the problem of over-limit oil pressure of the supercharger can be solved, the oil inlet pressure requirements of the supercharger can be met, and the comprehensive cost is lower than the scheme with a pre-feed pump, and the cost performance is higher. By setting the logic to control the solenoid valve to close, without human participation, the automation degree of the engine is higher.

[0073] Figure 4 is a flowchart of another control method for the oil inlet pressure of the supercharger provided by the embodiment of the present invention. Refer to Figure 4, the method includes:

[0074] S411. Obtain the current speed of the engine.

[0075] S412. When the obtained current speed of the engine is 0, determine that the engine has stopped, and record the current time as the stop time.

[0076] S413. Read the engine speed data in the third preset time period before the stop time.

[0077] Among them, the third time period can be freely set according to specific circumstances, so as to be able to determine the current working condition of the engine. Exemplarily, by reading the engine speed data in the 5 minutes before the stop time, the current working condition of the engine is determined to be the pre-lubrication working condition or the post-lubrication working condition.

[0078] S414. If the engine speed in the third preset time period before the stop time is read as non-zero, determine that the current working condition of the engine is the post-lubrication working condition.

[0079] S415. If the engine speed in the third preset time period before the stop time is read as zero, determine that the current working condition of the engine is the pre-lubrication working condition.

[0080] Optionally, Figure 3 Step S310 in the embodiment can include steps S411 to S415.

[0081] In the embodiment of the present invention, by reading the speed of the engine, it can be judged whether the engine is in the working state or the stopped state at this time. Then, by reading the engine speed data in the third preset time period before the stop time, it is judged whether the engine is in the pre-lubrication working condition or the post-lubrication state, and separate control logics are set for different working conditions.

[0082] S420. When it is determined that the current working condition of the engine is the post-lubrication working condition, after the first preset time period, control the solenoid valve to open, and continuously monitor the engine state within the second preset time period after the solenoid valve is opened.

[0083] S430. When the monitored engine speed is 0, synchronously monitor the oil inlet pressure of the supercharger and compare it with the preset alarm pressure.

[0084] S440. When the oil inlet pressure of the supercharger is greater than the preset alarm pressure, issue an alarm prompt.

[0085] S450. After the second preset time period after the solenoid valve is opened, control the solenoid valve to close.

[0086] In other embodiments, when the oil inlet pressure of the supercharger is less than or equal to the preset alarm pressure, after the second preset time period after the solenoid valve is opened, control the solenoid valve to close.

[0087] Optionally, based on the above embodiments, continue to refer to Figure 4 , after step S415, it further includes:

[0088] S470. When it is determined that the current working condition of the engine is the pre-lubrication working condition, control the solenoid valve to open, synchronously monitor the oil inlet pressure of the supercharger, and compare it with the preset alarm pressure.

[0089] S480. When the oil inlet pressure of the supercharger is greater than the preset alarm pressure, issue an alarm prompt.

[0090] S490. When it is monitored that the engine speed is greater than 0, control the solenoid valve to close.

[0091] In other embodiments, when the oil inlet pressure of the supercharger is less than or equal to the preset alarm pressure and it is monitored that the engine speed is greater than 0, control the solenoid valve to close.

[0092] Optionally, based on the above embodiments, continue to refer to Figure 4 , after step S420, it further includes:

[0093] S431. When it is monitored that the engine speed is greater than 0, control the solenoid valve to close.

[0094] It can be understood that the engine state is continuously monitored within the second preset time period after the solenoid valve is opened. When it is monitored that the engine speed is greater than 0, it indicates that the engine starts. Immediately output a signal to the solenoid valve to control the solenoid valve to close and synchronously close the timer.

[0095] Figure 5 is a schematic structural diagram of a control device for the oil inlet pressure of a supercharger provided by an embodiment of the present invention. Refer to Figure 5 , the device includes: a current working condition determination module 510, a solenoid valve control and engine state monitoring module 520, an oil inlet pressure monitoring and comparison module 530, and an alarm prompt module 540.

[0096] In an embodiment of the present invention, a current operating condition determination module 510 is configured to determine the current operating condition of the engine according to the engine speed; a solenoid valve control and engine status monitoring module 520 is configured to control the solenoid valve to open after a first preset time period when the current operating condition determination module 510 determines that the current operating condition of the engine is a post-lubrication operating condition, and continuously monitor the engine status within a second preset time period after the solenoid valve is opened; an inlet oil pressure monitoring and comparison module 530 is configured to synchronously monitor the inlet oil pressure of the supercharger and compare it with a preset alarm pressure when the solenoid valve control and engine status monitoring module 520 monitors that the engine speed is 0; an alarm prompt module 540 is configured to issue an alarm prompt when the inlet oil pressure monitoring and comparison module 530 determines that the inlet oil pressure of the supercharger is greater than the preset alarm pressure; the solenoid valve control and engine status monitoring module 520 is further configured to control the solenoid valve to close within the second preset time period after the solenoid valve is opened.

[0097] Figure 6 FIG. 4 is a schematic structural diagram of a current operating condition determination module provided by an embodiment of the present invention. Optionally, based on the above embodiment, with reference to Figure 6 , the current operating condition determination module 510 includes: an engine speed acquisition unit 511, a shutdown moment recording unit 512, a speed data reading unit 513, and an operating condition determination unit 514.

[0098] In an embodiment of the present invention, the engine speed acquisition unit 511 is configured to acquire the current speed of the engine; the shutdown moment recording unit 512 is configured to determine that the engine has shut down and record the current time period as the shutdown moment when the current speed of the engine acquired by the engine speed acquisition unit 511 is 0; the speed data reading unit 513 is configured to read the engine speed data of a third preset time period before the shutdown moment; the operating condition determination unit 514 is configured to determine that the current operating condition of the engine is a post-lubrication operating condition if the speed data reading unit 513 reads engine speed data in the third preset time period before the shutdown moment; the operating condition determination unit 514 is further configured to determine that the current operating condition of the engine is a pre-lubrication operating condition if the speed data reading unit 513 does not read engine speed data in the third preset time period before the shutdown moment.

[0099] The supercharger inlet oil pressure control device provided by the embodiment of the present invention can execute the supercharger inlet oil pressure control method provided by any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method. For the content not described in detail in the embodiment of the present invention, reference can be made to the supercharger inlet oil pressure control method provided by the above embodiment.

[0100] The embodiment of the present invention further provides a supercharger inlet oil pressure control module. Continuing to refer to Figure 2, the control module 200 for the inlet oil pressure of the supercharger is applicable to an engine including a supercharger 110, a belt-driven pump 120, a standby pump 130, and an oil pan 150. The belt-driven pump 120 and the standby pump 130 are arranged in parallel between the oil pan 150 and the supercharger 110; the control module 200 for the inlet oil pressure of the supercharger includes: a pressure relief valve 210, a solenoid valve 220, an orifice plate 230, and a switching valve 240. The pressure relief valve 210, the orifice plate 230, and the switching valve 240 are sequentially connected in series between the oil pan 150 and the engine; the first end of the solenoid valve 220 is connected to the pressure relief valve 210, and the second end of the solenoid valve 220 is connected to the oil pan 150. Wherein, when the engine speed is greater than 0, the belt-driven pump 120 is turned on and the standby pump 130 is turned off; in the pre-lubrication condition and the post-lubrication condition, the belt-driven pump 120 is turned off, the standby pump 130 is turned on, and the solenoid valve 220 and the pressure relief valve 210 are turned on; in the extreme condition where the standby pump 130 supplies the engine to run, the switching valve 240 is turned off; the orifice plate 230 is used to adjust the overall resistance of the pipeline of the control module for the inlet oil pressure of the supercharger.

[0101] It should be noted that when the engine speed is greater than 0, it means that the engine is working normally. At this time, the belt-driven pump 120 is turned on and the standby pump 130 is turned off. In the pre-lubrication condition and the post-lubrication condition, the belt-driven pump 120 is turned off, the standby pump 130 is turned on, and the solenoid valve 220 and the pressure relief valve 210 are turned on, so as to be able to reduce the inlet oil pressure of the supercharger 110. In the extreme condition where the standby pump 130 supplies the engine to run, the switching valve 240 is turned off. At this time, the parts of the control module 200 for the inlet oil pressure of the supercharger provided by the embodiment of the present invention are in a closed state.

[0102] Among them, the pressure relief valve 210 can be a mechanical lubricating oil pressure relief valve with a large flow diameter, and the solenoid valve 220 can be a solenoid valve with a small diameter. It can be understood that when the lubricating oil pressure relief valve is opened, the inlet oil pressure of the supercharger is reduced. The lubricating oil pressure relief valve adopts a pilot-operated design structure. The pilot-operated type is an actuator structure that uses a small-flow passage to control the opening and closing of a large-flow passage. The control of the small-flow passage can be controlled by a small solenoid valve, which is more reliable and flexible. In this embodiment, the opening / closing of the oil circuit of the lubricating oil pressure relief valve is controlled by a small-diameter solenoid valve, and the cost will be very low. Moreover, the small-diameter solenoid valve has the advantages of low power consumption, less heat generation, and the coil is not easily burned out, so that the reliability of the solenoid valve can be greatly guaranteed. By designing the orifice plate 230, the overall resistance of the pipeline of the control module 200 for the inlet oil pressure of the supercharger provided by the embodiment of the present invention can be flexibly adjusted, improving the environmental adaptability of the entire solution and the ability to adapt to different types of superchargers.

[0103] In the embodiment of the present invention, parts such as the pressure relief valve 210, the solenoid valve 220, and the orifice plate 230 are designed into the control module 200 for the inlet oil pressure of the supercharger. Adopting a modular design, it can be adapted to different models, greatly improving the versatility.

[0104] Optionally, based on the above embodiments, continue to refer to Figure 2 , the control module 200 for the supercharger inlet oil pressure further includes: a first one-way valve 250 and a second one-way valve 260; the input end of the first one-way valve 250 is connected to the engine-driven pump 120, and the output end of the first one-way valve 250 is connected to the engine; the input end of the second one-way valve 260 is connected to the standby pump 130, and the output end of the second one-way valve 260 is connected to the output end of the first one-way valve 250.

[0105] In the embodiment of the present invention, a first one-way valve 250 is provided in the inlet pipeline of the engine-driven pump 120, and a second one-way valve 260 is designed in the inlet pipeline of the standby pump 130, which can ensure that the operation of any one pump does not affect the other pump.

[0106] Figure 7 is a schematic structural diagram of another control module for the supercharger inlet oil pressure provided by the embodiment of the present invention. Optionally, based on the above embodiments, refer to Figure 7 , the control module 200 for the supercharger inlet oil pressure further includes: an oil inlet assembly 270, an oil drain assembly 280, a high-pressure part assembly 290 of the control oil circuit, a low-pressure part assembly 2100 of the control oil circuit, and mounting bolts 2110; the oil inlet assembly 270 and the oil drain assembly 280 are fixed on the pressure relief valve 210, and the orifice plate 230 is installed between the pressure relief valve 210 and the oil inlet assembly 270; the solenoid valve 220, the high-pressure part assembly 290 of the control oil circuit, and the low-pressure part assembly 2100 of the control oil circuit form a control oil circuit and are fixed to the engine through the mounting bolts 2110.

[0107] Among them, the control module 200 for the supercharger inlet oil pressure can reserve a mating flange and an installation position for the orifice plate, so as to improve the convenience of installation and debugging. The oil inlet assembly 270 and the oil drain assembly 280 can adopt standard specification pipes, which are convenient for in-ship installation. In addition, the pressure relief valve 210 can also be replaced with a pilot-operated lubricating oil automatic pressure regulating valve. Only some parts of the pilot-operated lubricating oil automatic pressure regulating valve need to be modified, and the high-pressure part assembly 290 of the control oil circuit is connected to the main spring cavity of the pilot-operated lubricating oil automatic pressure regulating valve, and the solenoid valve 220 is used to override control the pilot valve structure, and the functions of the present invention can also be realized. In addition, a series of orifice plates 230 with different inner hole sizes can be designed, which can be flexibly replaced and debugged during the engine debugging stage. The embodiment of the present invention uses a pilot-operated structure of the lubricating oil pressure relief valve, which can ensure strong lubricating oil sealing ability, and the pure mechanical structure design can ensure the reliability of the components. And the lubricating oil circuit should be unobstructed rather than blocked, which improves the reliability of the method. The integrated modular design idea of key components improves the versatility and adaptability, and the cost is more advantageous.

[0108] An embodiment of the present invention further provides an engine, including the control module for the supercharger oil inlet pressure, the supercharger, the engine-driven pump, the standby pump, and the oil pan in any of the above embodiments.

[0109] It should be understood that various forms of the processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0110] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for controlling the oil inlet pressure of a supercharger, characterized in that: The invention is applicable to an engine including a supercharger, a belt pump, a backup pump, an oil pan and a control module for the oil inlet pressure of the supercharger, wherein the belt pump and the backup pump are arranged in parallel between the oil pan and the supercharger; the control module for the oil inlet pressure of the supercharger comprises: a pressure relief valve, a solenoid valve, a throttle orifice plate and a switch valve; the pressure relief valve, the throttle orifice plate and the switch valve are arranged in series in sequence between the oil pan and the supercharger; the first end of the solenoid valve is connected to the pressure relief valve, and the second end of the solenoid valve is connected to the oil pan; The method for controlling the oil inlet pressure of the supercharger comprises: determining a current operating condition of the engine according to a rotation speed of the engine; When it is determined that the current operating condition of the engine is a post-lubrication operating condition, after a first preset time period, the solenoid valve is controlled to open, and the engine state is continuously monitored within a second preset time period after the solenoid valve is opened; When the engine speed is detected to be 0, the oil inlet pressure of the supercharger is monitored synchronously and compared with a preset alarm pressure; When the oil inlet pressure of the supercharger is greater than the preset alarm pressure, an alarm prompt is issued; After the solenoid valve is opened for a second preset period of time, the solenoid valve is controlled to be closed.

2. The method according to claim 1, characterized in that Determining the current operating condition of the engine according to the rotation speed of the engine includes: Obtaining the current speed of the engine; When the current speed of the engine is 0, the engine is determined to be stopped, and the current time is recorded as the stopping time; Reading the engine speed data of a third preset time period before the shutdown moment; If it is read that the engine speed in the third preset time period before the shutdown moment is not zero, determining that the current operating condition of the engine is a post-lubrication operating condition; If it is read that the engine speed in the third preset time period before the shutdown moment is zero, it is determined that the current operating condition of the engine is a pre-lubrication condition.

3. The method according to claim 2, characterized in that After determining that the current operating condition of the engine is the pre-lubrication operating condition if the engine speed in the third preset time period before the shutdown moment is zero, the method further includes: When it is determined that the current operating condition of the engine is the pre-lubrication condition, the solenoid valve is controlled to open, the oil inlet pressure of the supercharger is synchronously monitored, and compared with the preset alarm pressure; When the oil inlet pressure of the supercharger is greater than the preset alarm pressure, an alarm prompt is issued; When it is monitored that the engine speed is greater than 0, the solenoid valve is controlled to close.

4. The method according to claim 1, characterized in that After the solenoid valve is controlled to open after a first preset time period when the current operating condition of the engine is determined to be a post-lubrication operating condition, and the engine state is continuously monitored within a second preset time period after the solenoid valve is opened, the method further includes: When it is monitored that the rotation speed of the engine is greater than 0, the solenoid valve is controlled to close.

5. A control device for supercharger oil inlet pressure, characterized in that: include: A current operating condition determination module, used to determine the current operating condition of the engine according to the rotation speed of the engine; a solenoid valve control and engine state monitoring module, configured to control the solenoid valve to open after a first preset time period when the current working condition determination module determines that the current working condition of the engine is a post-lubrication working condition, and to continuously monitor the engine state within a second preset time period after the solenoid valve is opened; An oil inlet pressure monitoring and comparison module, used to synchronously monitor the oil inlet pressure of the supercharger and compare it with a preset alarm pressure when the solenoid valve control and engine status monitoring module detects that the engine speed is 0; An alarm prompt module, configured to issue an alarm prompt when the oil inlet pressure monitoring and comparison module determines that the oil inlet pressure of the supercharger is greater than the preset alarm pressure; The solenoid valve control and engine status monitoring module is further configured to control the solenoid valve to close within a second preset time period after the solenoid valve is opened.

6. The control device for supercharger oil inlet pressure according to claim 5, characterized in that: The current operating condition determination module comprises: An engine speed acquisition unit, used to acquire the current speed of the engine; A stop time recording unit, used for determining that the engine is stopped when the current speed of the engine acquired by the engine speed acquisition unit is 0, and recording the current time period as the stop time; A speed data reading unit, used to read the engine speed data of a third preset time period before the shutdown moment; a working condition determination unit, configured to determine that the current working condition of the engine is a post-lubrication working condition if the speed data reading unit reads that there is engine speed data in a third preset time period before the shutdown moment; The operating condition determination unit is further configured to determine that the current operating condition of the engine is a pre-lubrication operating condition if the speed data reading unit reads that there is no engine speed data in a third preset time period before the shutdown moment.

7. A control module for supercharger oil inlet pressure, applicable to an engine comprising a supercharger, a belt pump, a backup pump and an oil pan, wherein the belt pump and the backup pump are arranged in parallel between the oil pan and the supercharger; characterized in that: The control module of the supercharger oil inlet pressure includes: a pressure relief valve, a solenoid valve, a throttle orifice plate and a switch valve; The pressure relief valve, the throttle orifice plate and the switch valve are sequentially arranged in series between the oil pan and the engine; the first end of the solenoid valve is connected to the pressure relief valve, and the second end of the solenoid valve is connected to the oil pan; When the engine speed is greater than 0, the belt pump is turned on and the standby pump is turned off; under pre-lubrication conditions and post-lubrication conditions, the belt pump is turned off, the standby pump is turned on, and the solenoid valve and the pressure relief valve are turned on; under the extreme condition where the standby pump supplies the engine, the switch valve is closed; the throttle orifice is used to adjust the overall resistance of the control module pipeline of the supercharger oil inlet pressure.

8. The control module for supercharger oil inlet pressure according to claim 7, characterized in that: Also includes: a first one-way valve and a second one-way valve; The input end of the first one-way valve is connected to the engine-driven pump, and the output end of the first one-way valve is connected to the engine; An input end of the second one-way valve is connected to the standby pump, and an output end of the second one-way valve is connected to an output end of the first one-way valve.

9. The control module for supercharger oil inlet pressure according to claim 7, characterized in that: Also includes: Oil inlet assembly, oil discharge port assembly, control oil circuit high pressure part assembly, control oil circuit low pressure part assembly and mounting bolts; The oil inlet assembly and the oil discharge port assembly are fixed on the pressure relief valve, and the throttle orifice plate is installed between the pressure relief valve and the oil inlet assembly; The solenoid valve, the control oil circuit high pressure part assembly and the control oil circuit low pressure part assembly constitute the control oil circuit, and are fixed on the engine by the mounting bolts.

10. An engine, characterized in that: The invention comprises a control module for the supercharger oil inlet pressure as claimed in any one of claims 7 to 9, a supercharger, a belt pump, a backup pump and an oil pan.

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