Protection method and device for supercharger

Abstract

According to the protection method and device for the supercharger, the supercharger is connected with an oil storage valve, the oil storage valve is connected with a supercharger oil inlet pipe, and when it is detected that an engine is powered on, the shutdown duration of the engine is obtained; and the oil storage valve opening duration of the oil storage valve is determined according to the shutdown duration of the engine, and the oil storage valve is controlled to be opened according to the oil storage valve opening duration of the oil storage valve, so that engine oil pre-stored in an oil inlet pipe of the supercharger penetrates through the oil storage valve to enter the supercharger, and the supercharger is lubricated.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and more specifically, to a method and device for protecting a supercharger. Background Art

[0002] At present, most diesel engines use turbochargers, which require oil to lubricate the intermediate shaft to ensure reliable operation. However, after the engine is shut down, the oil in the intermediate shaft will flow back to the oil pan. During the next engine start-up, the engine speed needs to increase before the oil pump can drive the oil to press the oil into the main oil channel, and then flow through the lubricating oil channel to the intermediate shaft position of the supercharger to provide lubrication for the supercharger.

[0003] However, the supercharger will rotate as soon as the engine is started. Therefore, the oil lubrication is poor for a period of time when the engine starts. If there is poor flow in the supercharger oil inlet pipe, the poor oil lubrication will be aggravated, which may easily cause damage to the supercharger.

[0004] Therefore, how to provide a supercharger protection method to increase the lubrication effect of the engine oil before the engine is started and avoid damage to the supercharger is a problem that urgently needs to be solved in this application. Summary of the invention

[0005] In view of this, the present application provides a supercharger protection method and device to achieve the purpose of increasing the lubrication effect of the engine oil of the supercharger before the engine is started, thereby avoiding damage to the supercharger.

[0006] In a first aspect, the present application provides a method for protecting a supercharger, wherein the supercharger is connected to an oil storage valve, and the oil storage valve is connected to an oil inlet pipe of the supercharger, and the method comprises:

[0007] When it is detected that the engine is powered on, obtaining the shutdown time of the engine;

[0008] Determining the oil storage valve opening time of the oil storage valve according to the shutdown time of the engine;

[0009] The oil storage valve is controlled to open according to the oil storage valve opening time, so that the oil pre-stored in the supercharger oil inlet pipe passes through the oil storage valve into the supercharger to lubricate the supercharger.

[0010] Optionally, determining the oil storage valve opening time of the oil storage valve according to the shutdown time of the engine includes:

[0011] According to the shutdown duration of the engine, the oil storage valve opening duration of the oil storage valve is queried from the opening durations of the various oil storage valves in a pre-set first duration table; wherein the first duration table includes a plurality of pre-set shutdown durations of the engines and their corresponding oil storage valve opening durations.

[0012] Optionally, the supercharger oil inlet pipe is connected to the oil pump through a main oil channel, and determining the opening time of the oil storage valve according to the shutdown time of the engine includes:

[0013] According to the shutdown time of the engine, the oil pump oil supply time of the oil pump is queried from the respective oil pump oil supply time of the pre-set second time table; wherein the second time table includes the pre-set shutdown time of multiple engines and their corresponding oil pump oil supply time;

[0014] The oil supplying time of the oil pump is determined as the oil storage valve opening time of the oil storage valve.

[0015] Optionally, the method further includes:

[0016] Determining whether the shutdown time of the engine is greater than a preset shutdown time;

[0017] If the shutdown time of the engine is greater than the preset shutdown time, the step of determining the oil storage valve opening time of the oil storage valve according to the shutdown time of the engine is performed.

[0018] Optionally, the method further includes:

[0019] When it is detected that the engine is started, determining whether the oil storage valve is in an open state;

[0020] If the oil storage valve is in an open state, controlling the oil storage valve to maintain the open state, so that the oil pump presses the corresponding oil into the main oil gallery, and enters the supercharger through the main oil gallery, the supercharger oil inlet pipe and the oil storage valve;

[0021] If the oil storage valve is not in an open state, the oil storage valve is opened to allow the oil pump to press the corresponding oil into the main oil gallery and enter the supercharger through the main oil gallery, the supercharger oil inlet pipe and the oil storage valve.

[0022] Optionally, the method further includes:

[0023] When it is detected that the engine is stopped, the oil storage valve is controlled to be closed so that the supercharger oil inlet pipe can store the remaining oil.

[0024] Optionally, the supercharger is further connected to an oil return pipe, and a pressure sensor is provided on the oil return pipe. The method further includes:

[0025] monitoring the pressure value of the oil flowing in the oil return pipe by the pressure sensor, and determining whether the pressure value is less than a target pressure value;

[0026] If the pressure value is less than the target pressure value, a corresponding torque limiting operation is performed and corresponding pressure fault information is output.

[0027] A second aspect of the present application provides a supercharger protection device, the device comprising: a supercharger oil inlet pipe, an oil storage valve, a supercharger, an oil return pipe and an ECU;

[0028] One end of the oil storage valve is connected to one end of the supercharger oil inlet pipe, and the other end of the supercharger oil inlet pipe is connected to the oil pump through the main oil channel;

[0029] The other end of the oil storage valve is connected to one end of the supercharger, and the other end of the supercharger is connected to the oil return pipe;

[0030] The oil storage valve is controlled by the ECU, and the ECU is used to execute the supercharger protection method provided in the first aspect of the embodiment of the present application.

[0031] Optionally, the device further comprises a pressure sensor;

[0032] The pressure sensor is arranged on the straight pipe section of the oil return pipe, and the pressure sensor is controlled by the ECU.

[0033] Optionally, the device further comprises: a supercharger oil inlet pipe joint and a supercharger oil return pipe interface;

[0034] The other end of the oil storage valve is connected to one end of the supercharger through the supercharger oil inlet pipe joint;

[0035] The other end of the supercharger is connected to the oil return pipe through the supercharger oil return pipe interface.

[0036] The present application provides a supercharger protection method and device, the supercharger is connected to an oil storage valve, the oil storage valve is connected to a supercharger oil inlet pipe, and oil is pre-stored in the supercharger oil inlet pipe, so that when it is detected that the engine is powered on, the shutdown time of the engine is obtained, and the opening time of the oil storage valve of the oil storage valve is determined according to the shutdown time of the engine, and finally the opening time of the oil storage valve is controlled according to the opening time of the oil storage valve of the oil storage valve. It can be seen that the present application can open the oil storage valve in advance before the engine is powered on but not started, so that the oil pre-stored in the supercharger oil inlet pipe passes through the oil storage valve into the supercharger, and lubricates the supercharger in advance. In this way, when the engine is started, even if the supercharger oil inlet pipe has a poor flow, the supercharger will not malfunction due to lack of lubrication, thereby achieving the purpose of protecting the supercharger. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0038] Figure 1 A schematic structural diagram of a supercharger protection device provided in an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of another supercharger protection device provided in an embodiment of the present application;

[0040] Figure 3 A schematic structural diagram of another supercharger protection device provided in an embodiment of the present application;

[0041] Figure 4 A schematic flow chart of a method for protecting a supercharger provided in an embodiment of the present application;

[0042] Figure 5 A schematic flow chart of another supercharger protection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0045] It should be noted that the concepts such as "first" and "second" mentioned in the present application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0046] It should be noted that the modifications of "one" and "plurality" mentioned in the disclosure of this application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0047] See also Figure 1 , shows a schematic structural diagram of a supercharger protection device provided in an embodiment of the present application, the supercharger protection device includes a supercharger oil inlet pipe 1, an oil storage valve 2, a supercharger 3, an oil return pipe 4 and an electronic control unit (ECU) (not shown in the figure).

[0048] One end of the oil storage valve 2 is connected to one end of the supercharger oil inlet pipe 1, and the other end of the supercharger oil inlet pipe 1 is connected to the oil pump through the main oil channel; the other end of the oil storage valve 2 is connected to one end of the supercharger 3, and the other end of the supercharger 3 is connected to one end of the return oil pipe 4, and the other end of the return oil pipe is connected to the engine.

[0049] In the embodiment of the present application, an oil storage valve 2 can be connected to the downward end of the supercharger oil inlet pipe 1, that is, an oil storage valve 2 is installed at the downward position of the supercharger oil inlet pipe 1, that is, a supercharger oil inlet pipe 1 is connected above the oil storage valve 2, and a supercharger 3 is connected below the oil storage valve 2, so that after the oil storage valve 2 is opened, the engine oil pre-stored in the supercharger oil inlet pipe 1 can pass through the oil storage valve 2 into the supercharger 3 to lubricate the supercharger.

[0050] It should be noted that a supercharger oil inlet pipe 1 is connected above the oil storage valve 2 and a supercharger 3 is connected below the oil storage valve 2, so that after the oil storage valve 2 is opened, the engine oil pre-stored in the supercharger oil inlet pipe 1 can pass through the oil storage valve 2 under the action of gravity and remain on the intermediate shaft of the supercharger 3 to lubricate the intermediate shaft.

[0051] The oil storage valve 2 is controlled by the ECU, and the ECU is used to execute the supercharger protection method of any of the following embodiments. The process and principle of the supercharger protection method can be found in the following embodiments, and the embodiments of this application will not be repeated here.

[0052] It should be noted that the ECU controls the opening timing and opening duration of the oil storage valve 2 by executing the corresponding supercharger protection method, so as to achieve lubrication of the intermediate shaft of the supercharger 3 in advance before the engine starts, thereby avoiding the problem of supercharger damage caused by the speed of the supercharger 3 when the engine starts.

[0053] Further, combined with Figure 1 See also Figure 2 , the supercharger protection device provided in the embodiment of the present application further includes a supercharger oil inlet pipe interface 5 and a supercharger oil return pipe interface 6;

[0054] The other end of the oil storage valve 2 is connected to one end of the supercharger 3 through the supercharger oil inlet pipe joint 5, and the other end of the supercharger 3 is connected to the oil return pipe 4 through the supercharger oil return pipe interface 6.

[0055] It should be noted that the connection between the oil storage valve 2 and the supercharger 3 can be further strengthened through the supercharger oil inlet pipe interface 5, and the connection between the supercharger 3 and the oil return pipe 4 can be further strengthened through the supercharger oil return pipe interface 6.

[0056] Further, combined with Figure 2 See also Figure 3 , the supercharger protection device provided in the embodiment of the present application further includes a pressure sensor 7;

[0057] The pressure sensor 7 is arranged on the straight pipe section of the oil return pipe 4, and the pressure sensor 7 is controlled by the ECU.

[0058] In an embodiment of the present application, a pressure sensor 7 can be set on the straight pipe section of the return oil pipe 4, that is, a pressure sensor 7 is added to the oil return position of the return oil pipe 4, so that the ECU can detect whether the pressure of the oil flowing in the return oil pipe 4 is normal through the pressure sensor 7. When it is detected that the pressure of the oil flowing in the return oil pipe is high, that is, the detected pressure value of the flowing oil is lower than the normal pressure value, the corresponding torque limiting protection operation can be performed and the corresponding pressure fault information can be output to indicate that there is no oil lubrication at present.

[0059] Based on the supercharger protection device provided in the above embodiment of the present application, accordingly, the embodiment of the present application provides a supercharger protection method, such as Figure 4 As shown, the supercharger protection method is applied to the ECU in the supercharger protection device in any embodiment provided in the above-mentioned embodiment of the present application, and the supercharger protection method specifically includes the following steps:

[0060] S401: When it is detected that the engine is powered on, the shutdown time of the engine is obtained.

[0061] In the specific process of executing step S401, the ECU can detect the engine in real time, so that when it detects that the engine is powered on, the engine shutdown time is obtained through the corresponding counter. Specifically, when the ECU detects that the engine is shut down, it starts timing through the corresponding counter, so that when it detects that the engine is powered on again, the engine shutdown time is obtained. The counter is a counter in the ECU.

[0062] In some embodiments, after obtaining the engine shutdown duration, the ECU may clear the counter to zero, so that when the engine shutdown is detected again, the counter is controlled to start timing again.

[0063] S402: Determine the oil storage valve opening time of the oil storage valve according to the engine shutdown time.

[0064] During the specific execution of step S402, after obtaining the engine shutdown duration, the current oil storage valve opening duration of the oil storage valve can be further determined from the pre-set opening durations of each oil storage valve according to the engine shutdown duration, so as to control the opening of the oil storage valve according to the determined oil storage valve opening duration.

[0065] In the embodiments of the present application, the applicant has found through research that if the engine shutdown time is short, it means that there may still be some oil in the intermediate shaft of the supercharger. At this time, the opening time of the oil storage valve can be set to be shorter, so that a small amount of oil in the boost oil inlet pipe can flow into the intermediate shaft of the supercharger to avoid wasting oil resources; if the engine shutdown time is long, it means that there is no oil in the intermediate shaft of the supercharger. The opening time of the oil storage valve can be set to be longer to fully lubricate the intermediate shaft of the supercharger, thereby avoiding the situation where the supercharger rotates when the engine is started and causes damage to the supercharger.

[0066] It can be seen that the shutdown time of multiple engines and their corresponding oil storage valve opening time can be set in advance, and the corresponding first time table can be generated according to the shutdown time of each engine and its oil storage valve opening time, and finally the first time table is filled in the ECU, so that after the ECU obtains the shutdown time of the engine, it can query the oil storage valve opening time corresponding to the shutdown time of the currently acquired engine from the various oil storage valve opening times stored in the first time table; wherein, the first time table is shown in Figure 1.

[0067] Table 1:

[0068] Engine downtime h 1 3 5 10 Oil storage valve opening time 1 3 10 10

[0069] As a preferred method of an embodiment of the present application, the process of determining the oil storage valve opening time of the oil storage valve according to the engine shutdown time can be specifically as follows: after obtaining the engine shutdown time, the ECU obtains a pre-stored first time table, so as to query the oil storage valve opening time of the oil storage valve from the various oil storage valve opening times in the pre-set first time table according to the engine shutdown time; wherein the first time table includes a plurality of pre-set engine shutdown times and their corresponding oil storage valve opening times.

[0070] For example, assuming that the ECU detects that the engine shutdown time obtained when the engine is powered on is 3 hours, then according to the currently obtained engine shutdown time, it can be determined from the first time table that the oil storage valve opening time of the oil storage valve is 3 seconds.

[0071] In summary, by pre-setting the engine shutdown time and its corresponding oil reservoir valve opening time, after determining the current engine shutdown time, the current oil reservoir valve opening time of the oil reservoir valve can be determined from the pre-set oil reservoir valve opening times according to the current engine shutdown time, and then the oil reservoir valve opening time can be controlled accordingly according to the engine shutdown time, which not only can lubricate the intermediate shaft of the supercharger in advance, but also can avoid wasting oil resources.

[0072] In the embodiment of the present application, the applicant has also found through research that if the engine shutdown time is short, it means that there may still be some oil in the intermediate shaft of the supercharger. At this time, the oil supply time of the pre-supply oil pump can be set shorter, that is, the opening time of the oil storage valve can be set shorter, so that a small amount of oil in the supercharged oil inlet pipe can flow into the intermediate shaft of the supercharger to avoid wasting oil resources; if the engine shutdown time is long, it means that there is no oil in the intermediate shaft of the supercharger. The oil supply time of the pre-supply oil pump can be set longer, that is, the opening time of the oil storage valve can be set longer, so as to fully lubricate the intermediate shaft of the supercharger, thereby avoiding the situation that the supercharger rotates when the engine is started and causes damage to the supercharger. Among them, the pre-supply oil pump can be an oil pump driven by a motor, and oil can be supplied before starting the engine.

[0073] It can be seen that the shutdown time of multiple engines and their corresponding oil pump supply time can be pre-set, and the corresponding second time table can be generated according to the shutdown time of each engine and its oil pump supply time. Finally, the pre-set second time table can be filled in the ECU, so that after the ECU obtains the shutdown time of the engine, it can query the oil pump supply time corresponding to the shutdown time of the currently acquired engine from the various oil pump supply times stored in the second time table, and determine the queried oil pump supply time as the oil storage valve opening time of the oil storage valve; wherein, the second time table is shown in Figure 2.

[0074] Table 2:

[0075] Engine downtime h 1 3 5 10 Oil pump oil supply time 1 3 10 10

[0076] As another implementation method of the embodiment of the present application, the supercharger oil inlet pipe is connected to the oil pump through the main oil channel. The process of determining the oil reservoir valve opening time of the oil reservoir valve according to the engine shutdown time can also be: according to the engine shutdown time, query the oil pump oil supply time of the oil pump from each oil pump oil supply time in a pre-set second time table; wherein the second time table includes a plurality of pre-set engine shutdown times and their corresponding oil pump oil supply times; and determine the oil pump oil supply time of the oil pump as the oil reservoir valve opening time of the oil reservoir valve.

[0077] For example, assuming that the ECU detects that the engine shutdown time obtained when the engine is powered on is 3 hours, the corresponding oil pump oil supply time can be queried from the second time table based on the currently obtained engine shutdown time, which is 3 seconds, and then the oil storage valve opening time of the oil storage valve can be determined to be 3 seconds.

[0078] In summary, by pre-setting the engine shutdown duration and its corresponding oil reservoir valve opening duration, after the current engine shutdown duration is determined, the oil pump oil supply duration corresponding to the current engine shutdown duration is determined from the pre-set oil pump oil supply durations according to the current engine shutdown duration, and the determined oil pump oil supply duration is determined as the current oil reservoir valve opening duration of the oil reservoir valve, and then the oil reservoir valve opening duration can be controlled accordingly according to the engine shutdown duration, which not only can lubricate the intermediate shaft of the supercharger in advance, but also can avoid wasting oil resources.

[0079] S403: Controlling the oil storage valve to open according to the oil storage valve opening time of the oil storage valve, so that the oil pre-stored in the supercharger oil inlet pipe passes through the oil storage valve into the supercharger to lubricate the supercharger.

[0080] In the specific process of executing step S403, after determining the opening time of the oil storage valve, the oil storage valve can be controlled to open so that the oil pre-stored in the supercharger oil inlet pipe passes through the oil storage valve into the supercharger to lubricate the supercharger, and the time to open the oil storage valve is controlled according to the determined opening time of the oil storage valve to avoid wasting oil resources due to opening the oil storage valve for too long.

[0081] Further, in the embodiment of the present application, the supercharger provided in the embodiment of the present application is also connected to a return oil pipe, wherein the specific connection method between the supercharger and the return oil pipe can be referred to in Figure 1 The disclosed protection device for the supercharger will not be described in detail here.

[0082] The ECU can also detect the pressure value of the oil flowing in the oil return pipe in real time through the pressure sensor set on the oil return pipe, and determine whether the pressure value is less than the target pressure value; if the pressure value is less than the target pressure value, perform the corresponding torque limiting operation and output the corresponding pressure fault information; if the pressure value is not less than the target pressure value, it can return to the step of detecting the pressure value of the oil flowing in the oil return pipe in real time through the pressure sensor set on the oil return pipe.

[0083] In the embodiment of the present application, a corresponding normal pressure value can be set according to corresponding usage experience, and the set normal pressure value can be set as a target pressure value, so that after detecting the pressure value of the oil flowing in the return oil pipe, it can be determined whether the pressure value is less than the corresponding normal pressure value. If it is less than, it can be considered that the supercharger is currently without oil lubrication and a corresponding torque limiting operation is required to protect the supercharger and avoid damage to the supercharger. At the same time, corresponding pressure fault information can also be output to prompt corresponding technicians to perform corresponding inspections and maintenance in a timely manner.

[0084] It should be noted that if there is no oil flowing in the oil return pipe or the oil flowing is less, then the pressure value of the oil flowing in the oil return pipe is low. At this time, it can be considered that the supercharger is currently without oil lubrication or the oil lubrication effect is poor. In order to avoid damage to the supercharger, the corresponding torque limiting operation can be performed and the corresponding pressure fault information can be output. For example, the normal pressure value can be set to 150KPa. If the pressure value of the oil flowing in the oil return pipe is detected to be 200KPa, it can be considered that the oil flowing in the oil return pipe is normal; if the pressure value of the oil flowing in the oil return pipe is detected to be 100KPa, it can be considered that the oil flowing in the oil return pipe is currently less, that is, the current oil lubrication effect of the supercharger is not increased. In order to avoid damage to the supercharger, the corresponding torque limiting operation can be performed and the corresponding pressure fault information can be output.

[0085] The present application provides a method for protecting a supercharger, wherein the supercharger is connected to an oil storage valve, the oil storage valve is connected to an oil inlet pipe of the supercharger, and oil is pre-stored in the oil inlet pipe of the supercharger, so that when the engine is detected to be powered on, the shutdown time of the engine is obtained, and the opening time of the oil storage valve is determined according to the shutdown time of the engine, and finally the opening time of the oil storage valve is controlled according to the opening time of the oil storage valve. It can be seen that the technical solution provided by the embodiment of the present application can determine the actual opening of the oil storage valve by real-time detection of whether the engine is powered on, and can also control the opening time of the oil storage valve according to the opening time of the oil storage valve determined by the shutdown time of the engine, so as to realize that before the engine is powered on but not started, the oil storage valve is opened to allow the oil pre-stored in the oil inlet pipe of the supercharger to pass through the oil storage valve into the supercharger, and lubricate the supercharger in advance, so that when the engine is started, even if the oil inlet pipe of the supercharger is not flowing smoothly, the supercharger will not fail due to lack of lubrication, thereby achieving the purpose of protecting the supercharger.

[0086] Based on the supercharger protection device provided in the above embodiment of the present application, correspondingly, the embodiment of the present application can also provide another supercharger protection method, such as Figure 5 As shown, the supercharger protection method is applied to the ECU in the supercharger protection device in any embodiment provided in the above-mentioned embodiment of the present application, and the supercharger protection method specifically includes the following steps:

[0087] S501: When it is detected that the engine is powered on, the shutdown time of the engine is obtained.

[0088] In the specific execution process of step S501, the specific execution process and implementation principle of step S501 are the same as those disclosed in the above-mentioned embodiment of the present application. Figure 4 The execution process and implementation principle of step S401 in are the same as those in Figure 4 The corresponding contents in the present application will not be repeated here.

[0089] S502: Determine whether the engine shutdown time is greater than the preset shutdown time; if the engine shutdown time is greater than the preset shutdown time, execute step S503; if the engine shutdown time is not greater than the preset shutdown time, return to execute step S501.

[0090] In the embodiment of the present application, the applicant has found through research that if the engine shutdown time is very short, it means that there is still oil on the intermediate shaft of the supercharger, and the oil on the intermediate shaft of the supercharger can still meet the rotation of the intermediate shaft, that is, even if no more oil is added to the supercharger, it will not cause wear of the supercharger. Therefore, a corresponding preset shutdown time can be further set, and the oil storage valve opening time corresponding to the preset shutdown time is 0s, that is, if the engine shutdown time is not greater than the preset shutdown time, then it can be determined that the oil storage valve opening time of the oil storage valve is 0s, that is, it can be considered that if the engine shutdown time is not greater than the preset shutdown time, the oil storage valve does not need to be opened, and the oil storage valve can be opened after the engine start is detected, so that the oil pump can smoothly pass the oil through the main oil channel, the supercharger oil inlet pipe and the oil storage valve into the supercharger.

[0091] In the specific process of executing step S502, after obtaining the engine shutdown time, before opening the oil storage valve, it can be determined whether the engine shutdown time is greater than the preset shutdown time; if the engine shutdown time is not greater than the preset shutdown time, return to execute step S501; if the engine shutdown time is greater than the preset shutdown time, it means that there is no oil on the intermediate shaft of the supercharger, or the oil on the intermediate shaft of the supercharger can no longer meet the rotation of the intermediate shaft, and it is necessary to further inject oil into the supercharger to meet the rotation of the intermediate shaft, and then step S503 can be executed.

[0092] S503: Determine the oil storage valve opening time of the oil storage valve according to the engine shutdown time.

[0093] S504: Controlling the oil storage valve to open according to the oil storage valve opening time of the oil storage valve, so that the engine oil pre-stored in the supercharger oil inlet pipe passes through the oil storage valve into the supercharger to lubricate the supercharger.

[0094] In the specific execution process of steps S503-504, the specific execution process and implementation principle of steps S503-504 are the same as those disclosed in the above-mentioned embodiment of the present application. Figure 4 The execution process and implementation principle of steps S402-S403 in are the same, see Figure 4 The corresponding contents in the present application will not be repeated here.

[0095] S505: When the engine start is detected, determine whether the oil storage valve is in an open state; if the oil storage valve is in an open state, execute step S506; if the oil storage valve is not in an open state, execute step 507.

[0096] During the specific execution of step S505, after the ECU controls the opening of the oil reservoir valve according to the opening duration of the oil reservoir valve, it can continue to detect whether the engine is started; when it is detected that the engine is started, in order to ensure that the oil pump can smoothly transport the oil to the supercharger, it can be further determined whether the oil reservoir valve is in an open state; if the oil reservoir valve is in an open state, step S506 can be executed to control the oil reservoir valve to maintain an open state, so that the oil pump presses the corresponding oil into the main oil channel, and enters the supercharger through the main oil channel, the supercharger oil inlet pipe and the oil reservoir valve; if the oil reservoir valve is not in an open state, step S507 can be executed to open the oil reservoir valve, so that the oil pump presses the corresponding oil into the main oil channel, and enters the supercharger through the main oil channel, the supercharger oil inlet pipe and the oil reservoir valve.

[0097] S506: Control the oil storage valve to maintain an open state.

[0098] During the specific execution of step S506, after detecting that the engine is started, if the ECU determines that the oil storage valve is in an open state, it can control the oil storage valve to maintain the open state, so that the oil pump presses the corresponding oil into the main oil channel and enters the supercharger through the main oil channel, the supercharger oil inlet pipe and the oil storage valve.

[0099] S507: Open the oil storage valve.

[0100] During the specific execution of step S507, after detecting that the engine is started, if the ECU determines that the oil storage valve is not in the open state, that is, the oil storage valve is currently closed and loaded, the oil storage valve can be controlled to open, so that the oil pump presses the corresponding oil into the main oil channel and enters the supercharger through the main oil channel, the supercharger oil inlet pipe and the oil storage valve.

[0101] Furthermore, in the embodiment of the present application, during the process of controlling the opening of the oil storage valve, the ECU can also detect in real time whether there is an engine shutdown request. When the engine shutdown request is detected, that is, when the engine shutdown is detected, the oil storage valve can be controlled to close. At this time, there is still flowing oil in the supercharger. After closing the oil storage valve, the oil above the oil storage valve can be stored in the supercharger oil inlet pipe, even if the supercharger oil inlet pipe stores the remaining oil, so that when the engine is powered on next time, the oil stored in the supercharger oil inlet pipe can be used to lubricate the supercharger in advance, thereby further achieving the purpose of protecting the supercharger.

[0102] For the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0103] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0104] The steps in the methods of the embodiments of the present invention may be adjusted in order, combined, or deleted according to actual needs.

[0105] The modules and sub-modules in the apparatus and terminal in each embodiment of the present invention may be combined, divided or deleted according to actual needs.

[0106] In the several embodiments provided by the present invention, it should be understood that the disclosed terminals, devices and methods can be implemented in other ways. For example, the terminal embodiments described above are only schematic, for example, the division of modules or submodules is only a logical function division, and there may be other division methods in actual implementation, such as multiple submodules or modules can be combined or integrated into another module, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0107] The modules or submodules described as separate components may or may not be physically separated, and the components of the modules or submodules may or may not be physical modules or submodules, that is, they may be located in one place, or they may be distributed on multiple network modules or submodules. Some or all of the modules or submodules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional module or submodule in each embodiment of the present invention may be integrated into one processing module, or each module or submodule may exist physically separately, or two or more modules or submodules may be integrated into one module. The above-mentioned integrated modules or submodules may be implemented in the form of hardware or in the form of software functional modules or submodules.

[0109] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0110] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0111] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for protecting a supercharger, characterized in that: The supercharger is connected to an oil storage valve, and the oil storage valve is connected to an oil inlet pipe of the supercharger. The method comprises: When it is detected that the engine is powered on, obtaining the shutdown time of the engine; Determining the oil storage valve opening time of the oil storage valve according to the shutdown time of the engine; The oil storage valve is controlled to open according to the oil storage valve opening time, so that the oil pre-stored in the supercharger oil inlet pipe passes through the oil storage valve into the supercharger to lubricate the supercharger.

2. The method according to claim 1, characterized in that The step of determining the opening time of the oil storage valve according to the shutdown time of the engine comprises: According to the shutdown duration of the engine, the oil storage valve opening duration of the oil storage valve is queried from the opening durations of the various oil storage valves in a pre-set first duration table; wherein the first duration table includes a plurality of pre-set shutdown durations of the engines and their corresponding oil storage valve opening durations.

3. The method according to claim 1, characterized in that The supercharger oil inlet pipe is connected to the oil pump through the main oil channel, and the oil storage valve opening time of the oil storage valve is determined according to the shutdown time of the engine, including: According to the shutdown time of the engine, the oil pump oil supply time of the oil pump is queried from the respective oil pump oil supply time of the pre-set second time table; wherein the second time table includes the pre-set shutdown time of multiple engines and their corresponding oil pump oil supply time; The oil supplying time of the oil pump is determined as the oil storage valve opening time of the oil storage valve.

4. The method according to claim 1, characterized in that: The method further comprises: Determining whether the shutdown time of the engine is greater than a preset shutdown time; If the shutdown time of the engine is greater than the preset shutdown time, the step of determining the oil storage valve opening time of the oil storage valve according to the shutdown time of the engine is performed.

5. The method according to claim 3, characterized in that: The method further comprises: When it is detected that the engine is started, determining whether the oil storage valve is in an open state; If the oil storage valve is in an open state, controlling the oil storage valve to maintain the open state, so that the oil pump presses the corresponding oil into the main oil gallery, and enters the supercharger through the main oil gallery, the supercharger oil inlet pipe and the oil storage valve; If the oil storage valve is not in an open state, the oil storage valve is opened to allow the oil pump to press the corresponding oil into the main oil gallery and enter the supercharger through the main oil gallery, the supercharger oil inlet pipe and the oil storage valve.

6. The method according to claim 1 or 5, characterized in that: The method further comprises: When it is detected that the engine is stopped, the oil storage valve is controlled to be closed so that the supercharger oil inlet pipe can store the remaining oil.

7. The method according to claim 1, characterized in that The supercharger is also connected to an oil return pipe, and a pressure sensor is provided on the oil return pipe. The method further includes: monitoring the pressure value of the oil flowing in the oil return pipe by the pressure sensor, and determining whether the pressure value is less than a target pressure value; If the pressure value is less than the target pressure value, a corresponding torque limiting operation is performed and corresponding pressure fault information is output.

8. A supercharger protection device, characterized in that: The device comprises: a supercharger oil inlet pipe, an oil storage valve, a supercharger, an oil return pipe and an ECU; One end of the oil storage valve is connected to one end of the supercharger oil inlet pipe, and the other end of the supercharger oil inlet pipe is connected to the oil pump through the main oil channel; The other end of the oil storage valve is connected to one end of the supercharger, and the other end of the supercharger is connected to the oil return pipe; The oil storage valve is controlled by the ECU, and the ECU is used to execute the supercharger protection method according to any one of claims 1 to 7.

9. The device according to claim 8, characterized in that The device also includes a pressure sensor; The pressure sensor is arranged on the straight pipe section of the oil return pipe, and the pressure sensor is controlled by the ECU.

10. The device according to claim 9, characterized in that The device also includes: a supercharger oil inlet pipe joint and a supercharger oil return pipe interface; The other end of the oil storage valve is connected to one end of the supercharger through the supercharger oil inlet pipe joint; The other end of the supercharger is connected to the oil return pipe through the supercharger oil return pipe interface.

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