Planet row detection method and related device

Abstract

The invention discloses a planet row detection method and a related device, and the method comprises the steps: obtaining a clutch combination black list and a clutch combination white list, detecting the combination state of each clutch and a planet row, and determining the clutch combined with the planet row as a current clutch combination; if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, it is indicated that the current clutch combination enables the output end of the planet row to be blocked and cannot form a gear, the transmission power of the planet row is blocked due to excessive constraint of the planet row, and it is determined that the planet row is in a locked state; if the current clutch combination is different from the clutch combinations included in the clutch combination white list, and the number of the clutches included in the current clutch combination is greater than the maximum number threshold value of the clutches, it is indicated that the current clutch combination is not the condition that gears cannot be formed due to insufficient constraints, and possibly the situation that the planetary line constraints are too many is avoided; and the transmission power of the planet row is blocked, so that the planet row is determined to be in a locked state.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a planetary gear detection method and related devices. Background Art

[0002] For the power drive system, preventing the vehicle from unexpected deceleration is one of the important safety goals. During driving, the automatic transmission should smoothly transmit the engine torque according to the driver's expectations.

[0003] For an automatic transmission (AT) system equipped with a planetary gear, the transmission power of the planetary gear may be blocked, that is, the planetary gear is in a locked state, resulting in the risk of deceleration that is not expected by the driver. Summary of the invention

[0004] In view of the above problems, the present application provides a planetary gear detection method and related devices for detecting whether the planetary gear is in a locked state, so as to avoid the risk of deceleration not desired by the driver due to the blocking of the transmitted power.

[0005] Based on this, the embodiments of the present application disclose the following technical solutions:

[0006] On the one hand, an embodiment of the present application provides a planetary gear detection method, the method comprising:

[0007] Obtaining a clutch combination blacklist and a clutch combination whitelist, wherein the clutch combination blacklist includes clutch combinations that block the output end of the planetary gear train and cannot form a gear, and the clutch combination whitelist includes clutch combinations that block the input end of the planetary gear train and cannot form a gear;

[0008] Detecting the engagement state of each clutch and the planetary gear train to obtain a current clutch combination, wherein the current clutch combination includes a clutch that is engaged with the planetary gear train;

[0009] If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the clutch maximum number threshold, it is determined that the planetary gear is in a locked state, and the clutch maximum number threshold is the maximum number of clutches combined with the planetary gear.

[0010] Optionally, if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than a clutch maximum number threshold, determining that the planetary gear set is in a locked state includes:

[0011] If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state; or,

[0012] If the current clutch combination is different from the clutch combinations included in the clutch combination whitelist, the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state.

[0013] Optionally, the detecting the engagement state of each clutch with the planetary gear to obtain the current clutch combination includes:

[0014] acquiring a pressure value of each of the clutches based on a clutch pressure sensor;

[0015] Determine a clutch whose pressure value is greater than a preset pressure threshold and whose duration is greater than a second time threshold as a clutch engaged with the planetary gear;

[0016] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0017] Optionally, the detecting the engagement state of each clutch with the planetary gear to obtain the current clutch combination includes:

[0018] Acquiring the position of each clutch based on a clutch position sensor;

[0019] Determining the engagement state of each clutch and the planetary gear according to the position of each clutch;

[0020] Determine the clutch that is in the engaged state and lasts longer than a second time threshold as the clutch engaged with the planetary gear;

[0021] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0022] Optionally, the detecting the engagement state of each clutch with the planetary gear to obtain the current clutch combination includes:

[0023] Acquiring the clutch torque corresponding to the current of each of the clutches;

[0024] Determine the clutch whose clutch torque is greater than a preset torque threshold and whose duration is greater than a third time threshold as a clutch combined with the planetary gear;

[0025] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0026] Optionally, the method further includes:

[0027] Acquire oil temperature and vehicle speed signals of the vehicle;

[0028] If the oil temperature is greater than a preset oil temperature threshold, and the vehicle speed signal indicates that the speed of the vehicle is greater than the vehicle speed threshold, a step is performed in which if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, determining that the planetary gear is in a locked state.

[0029] Optionally, the method further includes:

[0030] If it is determined that the planetary gear is in a locked state, the transmission chain is disengaged to interrupt power transmission.

[0031] On the other hand, the present application provides a detection device for a planetary gear, the device comprising: an acquisition unit, a detection unit and a determination unit;

[0032] The acquisition unit is used to acquire a clutch combination blacklist and a clutch combination whitelist, wherein the clutch combination included in the clutch combination blocks the output end of the planetary gear train and cannot form a gear position, and the clutch combination included in the clutch combination whitelist blocks the input end of the planetary gear train and cannot form a gear position;

[0033] The detection unit is used to detect the combination state of each clutch and the planetary gear, and obtain a current clutch combination, wherein the current clutch combination includes a clutch combined with the planetary gear;

[0034] The determination unit is used to determine that the planetary gear set is in a locked state if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than a clutch maximum number threshold, and the clutch maximum number threshold is the maximum number of clutches combined with the planetary gear set.

[0035] Optionally, the determining unit is specifically configured to:

[0036] If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state; or,

[0037] If the current clutch combination is different from the clutch combinations included in the clutch combination whitelist, the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state.

[0038] Optionally, the detection unit is specifically used to:

[0039] acquiring a pressure value of each of the clutches based on a clutch pressure sensor;

[0040] Determine a clutch whose pressure value is greater than a preset pressure threshold and whose duration is greater than a second time threshold as a clutch engaged with the planetary gear;

[0041] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0042] Optionally, the detection unit is specifically used to:

[0043] Acquiring the position of each clutch based on a clutch position sensor;

[0044] Determining the engagement state of each clutch and the planetary gear according to the position of each clutch;

[0045] Determine the clutch that is in the engaged state and lasts longer than a second time threshold as the clutch engaged with the planetary gear;

[0046] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0047] Optionally, the detection unit is specifically used to:

[0048] Acquiring the clutch torque corresponding to the current of each of the clutches;

[0049] Determine the clutch whose clutch torque is greater than a preset torque threshold and whose duration is greater than a third time threshold as a clutch combined with the planetary gear;

[0050] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0051] Optionally, the acquisition unit is further used to:

[0052] Acquire oil temperature and vehicle speed signals of the vehicle;

[0053] If the oil temperature is greater than a preset oil temperature threshold, and the vehicle speed signal indicates that the speed of the vehicle is greater than a vehicle speed threshold, a determination unit is called.

[0054] Optionally, the device further includes an execution unit, configured to:

[0055] If it is determined that the planetary gear is in a locked state, the transmission chain is disengaged to interrupt power transmission.

[0056] In another aspect, the present application provides a computer device, the device comprising a processor and a memory:

[0057] The memory is used to store program code and transmit the program code to the processor;

[0058] The processor is used to execute the method described in the above aspects according to the instructions in the program code.

[0059] On the other hand, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method described in the above aspects.

[0060] On the other hand, an embodiment of the present application provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method described in the above aspects.

[0061] The advantages of the above technical solution of this application are:

[0062] Obtain a clutch combination blacklist and a clutch combination whitelist, wherein the clutch combination included in the clutch combination blacklist blocks the output end of the planetary gearbox and cannot form a gear, and the clutch combination included in the clutch combination whitelist blocks the input end of the planetary gearbox and cannot form a gear. Detect the combination state of each clutch and the planetary gearbox, and determine the clutch combined with the planetary gearbox as the current clutch combination. If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, it means that the planetary gearbox has too many constraints, which will cause the transmission power of the planetary gearbox to be blocked, that is, the planetary gearbox is in a locked state; if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, that is, the number of clutches included in the current clutch combination is greater than the maximum number of clutches combined with the planetary gearbox, and the current clutch combination is not due to insufficient constraints. The situation that the gear cannot be formed, then it means that the planetary gearbox has too many constraints, which will cause the transmission power of the planetary gearbox to be blocked, that is, the planetary gearbox is in a locked state. Therefore, by detecting the current clutch combination and judging its relationship with the clutch combination blacklist and the clutch combination whitelist, it is possible to quickly detect whether the planetary gear is in a locked state, so as to avoid the risk of non-driver-expected deceleration due to power transmission interruption. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] 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 some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0064] Figure 1 A flow chart of a planetary gear detection method provided in an embodiment of the present application;

[0065] Figure 2 A schematic diagram of a planetary gear detection device provided in an embodiment of the present application;

[0066] Figure 3 A structural diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0067] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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.

[0068] In the related art, for a system equipped with a planetary gearbox, the planetary gearbox will be connected to multiple clutches so as to form corresponding gears by combining with different types and numbers of clutches. For example, a system equipped with a planetary gearbox includes 6 clutches, corresponding to No. 1 to No. 6 respectively. After clutch No. 1, clutch No. 2 and clutch No. 3 are combined with the planetary gearbox, they can correspond to the forward gear; after clutch No. 1, clutch No. 2 and clutch No. 4 are combined with the planetary gearbox, they can correspond to the reverse gear.

[0069] After research, it was found that when the clutch combined with the planetary gear is different from the clutch required for its corresponding gear, and it lasts for a period of time, the power transmission of the planetary gear will be blocked, causing the risk of unexpected deceleration for the driver.

[0070] Based on this, an embodiment of the present application provides a planetary gear detection method and related device, which determines whether there is a risk of power transmission blockage in the planetary gear by detecting the clutch combined with the planetary gear, thereby avoiding the risk of unexpected deceleration of the driver.

[0071] Combine the following Figure 1 , a planetary gear detection method provided in an embodiment of the present application is introduced. Figure 1 The method shown, in one implementation, may be executed by, for example, an electronic control unit (ECU) included in a vehicle. Figure 1 , this figure is a flow chart of a planetary gear detection method provided in an embodiment of the present application, and the method may include S101-S103.

[0072] S101: Acquire a clutch combination blacklist and a clutch combination whitelist.

[0073] Among them, the clutch combination blacklist includes clutch combinations that block the output end of the planetary gearbox and cannot form a gear, that is, the clutch combinations in the clutch combination blacklist have too many constraints, which may cause the planetary gearbox to be in a locked state, resulting in unexpected deceleration of the driver due to the blocking of the transmission power of the planetary gearbox.

[0074] The clutch combination whitelist includes clutch combinations that block the input end of the planetary gear set and cannot form a gear, that is, the planetary gear set corresponding to the clutch combination whitelist combination is not sufficiently constrained and cannot form a gear, for example, two clutches are connected to a component of the planetary gear set, such as a ring gear, a planet carrier, a sun gear, etc.

[0075] As a possible implementation method, a method for obtaining a clutch combination blacklist and a clutch combination whitelist is introduced below.

[0076] Obtain the number of clutch combinations corresponding to each gear position of the automatic transmission system equipped with a planetary gear, such as N1, N2, etc. Arrange the number of clutch combinations corresponding to each gear position from large to small to obtain a numerical arrangement, such as N1>N2, etc. Analyze the clutch combinations with the same value together, and start the analysis from the number of clutch combinations with the largest value, so as to reduce the subsequent workload while making the analysis comprehensive. For example, the forward gear position corresponds to clutch No. 1 and clutch No. 2, and the planetary gear combined with clutch No. 3 does not transmit power, so the gear position corresponding to the clutch combination composed of clutch No. 1, clutch No. 2 and clutch No. 3 can also be the forward gear. The clutch combination corresponding to N1 is used as an example for explanation below.

[0077] Analyze all the clutch combinations corresponding to N1 to determine whether they form a gear. They can be divided into three categories: the first category is that the planetary gear output is blocked and cannot form a gear. The planetary gear constraints corresponding to this type of clutch combination are too many, or in other words, this type of clutch combination will be added to the clutch combination blacklist. The second category is that the planetary gear input is blocked and cannot form a gear. The planetary gear constraints corresponding to this type of clutch combination are not enough to form a gear, or in other words, this type of clutch combination will be added to the clutch combination whitelist. Analyze in order according to the numerical arrangement, group all the clutch combinations corresponding to each numerical value, and add them to the corresponding list to obtain the clutch combination blacklist and clutch combination whitelist. The third category is that the planetary gear can output torque to form a gear. The planetary gear constraints corresponding to this type of clutch combination just form a gear. It can be understood that the first and second categories are categories that do not form a gear. The third category is a category that forms a gear.

[0078] Furthermore, in order to improve the accuracy of the clutch combination blacklist and the clutch combination whitelist, the two lists can be further expanded and screened. Assuming that the clutch combination blacklist is represented by C01 and the clutch combination whitelist is represented by C02, a specific description is given below.

[0079] A screening operation is performed for each clutch combination included in the clutch combination blacklist C01: taking a clutch combination included in the clutch combination blacklist C01 as an example, a clutch in the clutch combination is continuously reduced, and then it is determined whether there are still too many constraints and a gear cannot be formed. If so, the clutch combination after the clutch is reduced is taken as a new clutch combination and added to the new clutch combination blacklist C1 until all the clutch combinations included in the old clutch combination blacklist C01 are screened.

[0080] Perform expansion operations on each clutch combination included in the clutch combination whitelist C02: taking a clutch combination included in the clutch combination whitelist C02 as an example, continuously add clutches outside the clutch combination, and then determine whether the constraint is still insufficient to maintain the neutral state. If so, the clutch combination with the added clutch is treated as a new clutch combination and added to the new clutch combination whitelist C2 until all the clutch combinations included in the old clutch combination whitelist C02 are expanded.

[0081] Thus, through continuous expansion and screening, a new clutch combination blacklist C1 and a new clutch combination whitelist C2 can be obtained, and whether the current clutch combination is in a locked state is subsequently determined based on the new clutch combination blacklist C1 and the new clutch combination whitelist C2. It is understandable that the clutch combination included in the new clutch combination blacklist C1 causes the corresponding planetary gear to be too constrained, which may cause the planetary gear to be in a locked state, and the driver may experience unexpected deceleration due to the blocking of the transmission power of the planetary gear. The clutch combination included in the new clutch combination whitelist C2 causes the corresponding planetary gear to be insufficiently constrained and unable to form a gear, but will not cause the transmission power of the planetary gear to be blocked.

[0082] S102: Detect the engagement state of each clutch and the planetary gear, and obtain the current clutch combination.

[0083] The clutch and the planetary gear combination included in the current clutch combination, that is, the clutch combined with the planetary gear is detected to obtain the current clutch combination. The embodiment of the present application does not specifically limit the detection method, for example, various sensors are used to detect whether each clutch and the planetary gear are combined to obtain the combination state of each clutch and the planetary gear. The following is an example of three sensors.

[0084] Method 1: Based on the clutch pressure sensor, the pressure value of each clutch is obtained, and the clutch whose pressure value is greater than the preset pressure threshold and whose duration is greater than the second time threshold is determined as the clutch combined with the planetary gear. According to the clutch combined with the planetary gear, the current clutch combination is obtained.

[0085] Method 2: Based on the clutch position sensor, the position of each clutch is obtained, and the engagement state of each clutch and the planetary gear is determined according to the position of each clutch. The clutch that is in the engagement state and lasts longer than the second time threshold is determined to be the clutch engaged with the planetary gear. Based on the clutch engaged with the planetary gear, the current clutch combination is obtained.

[0086] Method three: Obtain the clutch torque corresponding to the current of each clutch, and determine the clutch whose clutch torque is greater than the preset torque threshold and whose duration is greater than the third time threshold as the clutch combined with the planetary gearbox, and obtain the current clutch combination based on the clutch combined with the planetary gearbox.

[0087] As a possible implementation method, since the preset torque threshold is related to the oil temperature and the engine torque, the preset torque threshold can be dynamically adjusted based on the oil temperature, wherein the lower the oil temperature, the greater the engine torque, and the corresponding preset torque threshold is greater.

[0088] As a possible implementation method, since the third time threshold is related to the oil temperature, the third time threshold can be dynamically adjusted based on the oil temperature. Among them, the lower the oil temperature, the larger the third time threshold. The third time threshold needs to distinguish between the first pre-filling and non-first pre-filling situations. Since the oil filling time is longer when the clutch is used for the first time, it can continue to be adjusted based on the first oil filling when it is used later. Therefore, the time spent on the first pre-filling will be longer than the time spent on the non-first pre-filling. Therefore, the third time threshold corresponding to the first pre-filling can be larger than the third time threshold of the non-first pre-filling.

[0089] S103: If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the clutch maximum number threshold, it is determined that the planetary gear is in a locked state.

[0090] If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, it means that the current clutch combination has too many constraints, which may cause the transmission power of the planetary gear to be blocked, resulting in an unexpected deceleration of the driver. At this time, in order to ensure safety, it can be determined that the planetary gear is in a locked state.

[0091] If the current clutch combination is different from the clutch combination included in the clutch combination whitelist, it means that the current clutch combination is not a clutch combination that blocks the input end of the planetary gear and cannot form a gear, and the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, where the maximum clutch number threshold is the maximum number of clutches combined with the planetary gear, such as N1 described above. In other words, the current clutch combination includes a large number of clutches, but it is not a situation where insufficient constraints will not cause the transmission power of the planetary gear to be blocked, then it may be a situation where there are too many constraints. At this time, in order to ensure safety, it can be determined that the planetary gear is in a locked state.

[0092] As a possible implementation method, if it is determined that the planetary gear is in a locked state, the transmission chain is controlled to be disengaged to interrupt the power transmission. For example, the transmission control unit should immediately request to disconnect the corresponding solenoid valve high-side drive to control the disengagement of the transmission chain to interrupt the power transmission until the end of this driving cycle. Among them, one driving cycle refers to the start of the driver starting the engine and the end of the engine shutting down.

[0093] As a possible implementation method, the vehicle's oil temperature and speed signals can be obtained first. If the oil temperature is greater than a preset oil temperature threshold, and the speed signal indicates that the vehicle's speed is greater than the speed threshold, it means that the vehicle speed currently exists and is not in a non-stationary or very low speed state. In addition, when the oil temperature signal is invalid, the oil temperature will be defaulted to a larger value, and then S103 will be executed to eliminate some false alarms and improve the accuracy of detection.

[0094] As a possible implementation, if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state; or,

[0095] If the current clutch combination is different from the clutch combination included in the clutch combination whitelist, the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state.

[0096] Therefore, when the number and type of clutches combined with the planetary gear are different from those required by the corresponding gear, and the duration exceeds a period of time (i.e., the first time threshold), it is determined that the planetary gear is in a locked state, which can avoid some false alarms and improve the accuracy of detection.

[0097] It can be known from the above technical solution that a clutch combination blacklist and a clutch combination whitelist for clutch combinations are obtained, wherein the clutch combination included in the clutch combination blacklist blocks the output end of the planetary gearbox and cannot form a gear, and the clutch combination included in the clutch combination whitelist blocks the input end of the planetary gearbox and cannot form a gear. The combination state of each clutch and the planetary gearbox is detected, and the clutch combined with the planetary gearbox is determined as the current clutch combination. If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, it means that the planetary gearbox has too many constraints, which will cause the transmission power of the planetary gearbox to be blocked, that is, the planetary gearbox is in a locked state; if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, that is, the number of clutches included in the current clutch combination is greater than the maximum number of clutches combined with the planetary gearbox, and the current clutch combination is not due to insufficient constraints. The situation that the gear cannot be formed, then it means that the planetary gearbox has too many constraints, which will cause the transmission power of the planetary gearbox to be blocked, that is, the planetary gearbox is in a locked state. Therefore, by detecting the current clutch combination and judging its relationship with the clutch combination blacklist and the clutch combination whitelist, it is possible to quickly detect whether the planetary gear is in a locked state, so as to avoid the risk of non-driver-expected deceleration due to power transmission interruption.

[0098] In addition to the planetary gear detection method provided in the embodiment of the present application, a planetary gear detection device is also provided, such as Figure 2 As shown, it includes: an acquisition unit 201, a detection unit 202 and a determination unit 203;

[0099] The acquisition unit 201 is used to acquire a clutch combination blacklist and a clutch combination whitelist, wherein the clutch combination blacklist includes clutch combinations that block the output end of the planetary gear train and cannot form a gear, and the clutch combination whitelist includes clutch combinations that block the input end of the planetary gear train and cannot form a gear;

[0100] The detection unit 202 is used to detect the combination state of each clutch and the planetary gear, and obtain a current clutch combination, wherein the current clutch combination includes a clutch combined with the planetary gear;

[0101] The determination unit 203 is used to determine that the planetary gear set is in a locked state if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the clutch maximum number threshold, and the clutch maximum number threshold is the maximum number of clutches combined with the planetary gear set.

[0102] It can be known from the above technical solution that a clutch combination blacklist and a clutch combination whitelist are obtained, wherein the clutch combination included in the clutch combination blacklist blocks the output end of the planetary gearbox and cannot form a gear, and the clutch combination included in the clutch combination whitelist blocks the input end of the planetary gearbox and cannot form a gear. The combination state of each clutch and the planetary gearbox is detected, and the clutch combined with the planetary gearbox is determined as the current clutch combination. If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, it means that the planetary gearbox has too many constraints, which will cause the transmission power of the planetary gearbox to be blocked, that is, the planetary gearbox is in a locked state; if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, that is, the number of clutches included in the current clutch combination is greater than the maximum number of clutches combined with the planetary gearbox, and the current clutch combination is not due to insufficient constraints. The situation that the gear cannot be formed, then it means that the planetary gearbox has too many constraints, which will cause the transmission power of the planetary gearbox to be blocked, that is, the planetary gearbox is in a locked state. Therefore, by detecting the current clutch combination and judging its relationship with the clutch combination blacklist and the clutch combination whitelist, it is possible to quickly detect whether the planetary gear is in a locked state, so as to avoid the risk of non-driver-expected deceleration due to power transmission interruption.

[0103] As a possible implementation manner, the determining unit 203 is specifically configured to:

[0104] If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state; or,

[0105] If the current clutch combination is different from the clutch combinations included in the clutch combination whitelist, the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state.

[0106] As a possible implementation manner, the detection unit 202 is specifically configured to:

[0107] acquiring a pressure value of each of the clutches based on a clutch pressure sensor;

[0108] Determine a clutch whose pressure value is greater than a preset pressure threshold and whose duration is greater than a second time threshold as a clutch engaged with the planetary gear;

[0109] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0110] As a possible implementation manner, the detection unit 202 is specifically configured to:

[0111] Acquiring the position of each clutch based on a clutch position sensor;

[0112] Determining the engagement state of each clutch and the planetary gear according to the position of each clutch;

[0113] Determine the clutch that is in the engaged state and lasts longer than a second time threshold as the clutch engaged with the planetary gear;

[0114] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0115] As a possible implementation manner, the detection unit 202 is specifically configured to:

[0116] Acquiring the clutch torque corresponding to the current of each of the clutches;

[0117] Determine the clutch whose clutch torque is greater than a preset torque threshold and whose duration is greater than a third time threshold as a clutch combined with the planetary gear;

[0118] The current clutch combination is obtained according to the clutch combined with the planetary gear.

[0119] As a possible implementation manner, the obtaining unit 201 is further configured to:

[0120] Acquire oil temperature and vehicle speed signals of the vehicle;

[0121] If the oil temperature is greater than a preset oil temperature threshold, and the vehicle speed signal indicates that the speed of the vehicle is greater than a vehicle speed threshold, the determination unit 203 is called.

[0122] As a possible implementation manner, the device further includes an execution unit, configured to:

[0123] If it is determined that the planetary gear is in a locked state, the transmission chain is disengaged to interrupt power transmission.

[0124] The present application also provides a computer device, see Figure 3 , which shows a structural diagram of a computer device provided in an embodiment of the present application, such as Figure 3 As shown, the device includes a memory 310 and a processor 320:

[0125] The memory 310 is used to store program codes and transmit the program codes to the processor;

[0126] The processor 320 is used to execute any planetary gear detection method provided in the above embodiments according to the instructions in the program code.

[0127] An embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, wherein the computer program is used to execute any one of the planetary gear detection methods provided in the above embodiments.

[0128] The embodiment of the present application also provides a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the planetary gear detection method provided in various optional implementations of the above aspects.

[0129] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0130] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0131] It should also 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.

[0132] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0133] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A planetary gear detection method, characterized in that: The method comprises: Obtaining a clutch combination blacklist and a clutch combination whitelist, wherein the clutch combination blacklist includes clutch combinations that block the output end of the planetary gear train and cannot form a gear, and the clutch combination whitelist includes clutch combinations that block the input end of the planetary gear train and cannot form a gear; Detecting the engagement state of each clutch and the planetary gear train to obtain a current clutch combination, wherein the current clutch combination includes a clutch that is engaged with the planetary gear train; If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the clutch maximum number threshold, it is determined that the planetary gear is in a locked state, and the clutch maximum number threshold is the maximum number of clutches combined with the planetary gear.

2. The method according to claim 1, characterized in that If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the clutch maximum number threshold, then determining that the planetary gear is in a locked state includes: If the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state; or, If the current clutch combination is different from the clutch combinations included in the clutch combination whitelist, the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, and the holding time of the current clutch combination exceeds the first time threshold, it is determined that the planetary gear is in a locked state.

3. The method according to claim 1, characterized in that The detecting the engagement state of each clutch and the planetary gear to obtain the current clutch combination includes: acquiring a pressure value of each of the clutches based on a clutch pressure sensor; Determine a clutch whose pressure value is greater than a preset pressure threshold and whose duration is greater than a second time threshold as a clutch engaged with the planetary gear; The current clutch combination is obtained according to the clutch combined with the planetary gear.

4. The method according to claim 1, characterized in that: The detecting the engagement state of each clutch and the planetary gear to obtain the current clutch combination includes: Acquiring the position of each clutch based on a clutch position sensor; Determining the engagement state of each clutch and the planetary gear according to the position of each clutch; Determine the clutch that is in the engaged state and lasts longer than a second time threshold as the clutch engaged with the planetary gear; The current clutch combination is obtained according to the clutch combined with the planetary gear.

5. The method according to claim 1, characterized in that The detecting the engagement state of each clutch and the planetary gear to obtain the current clutch combination includes: Acquiring the clutch torque corresponding to the current of each of the clutches; Determine the clutch whose clutch torque is greater than a preset torque threshold and whose duration is greater than a third time threshold as a clutch combined with the planetary gear; The current clutch combination is obtained according to the clutch combined with the planetary gear.

6. The method according to claim 1, characterized in that The method further comprises: Acquire oil temperature and vehicle speed signals of the vehicle; If the oil temperature is greater than a preset oil temperature threshold, and the vehicle speed signal indicates that the speed of the vehicle is greater than the vehicle speed threshold, a step is performed in which if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than the maximum clutch number threshold, determining that the planetary gear is in a locked state.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: If it is determined that the planetary gear is in a locked state, the transmission chain is disengaged to interrupt power transmission.

8. A planetary gear detection device, characterized in that: The device comprises: an acquisition unit, a detection unit and a determination unit; The acquisition unit is used to acquire a clutch combination blacklist and a clutch combination whitelist, wherein the clutch combination included in the clutch combination blocks the output end of the planetary gear train and cannot form a gear position, and the clutch combination included in the clutch combination whitelist blocks the input end of the planetary gear train and cannot form a gear position; The detection unit is used to detect the combination state of each clutch and the planetary gear, and obtain a current clutch combination, wherein the current clutch combination includes a clutch combined with the planetary gear; The determination unit is used to determine that the planetary gear set is in a locked state if the current clutch combination is the same as the clutch combination included in the clutch combination blacklist, or if the current clutch combination is different from the clutch combination included in the clutch combination whitelist, and the number of clutches included in the current clutch combination is greater than a clutch maximum number threshold, and the clutch maximum number threshold is the maximum number of clutches combined with the planetary gear set.

9. A computer device, characterized in that: The device comprises a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the method according to any one of claims 1 to 7 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method according to any one of claims 1 to 7.

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