A method for evaluating the unlocking control quality of a torque converter

Abstract

The present invention discloses a method for evaluating the unlocking control quality of a torque converter, and relates to the field of vehicle control technology. The specific implementation of the method includes: receiving an unlocking instruction, collecting a turbine speed signal during the unlocking process; determining multiple unlocking evaluation index parameters according to the turbine speed signal; determining the evaluation score and weight value of the unlocking evaluation index parameters according to a standard database; wherein the standard database is obtained according to historical unlocking evaluation index parameters; determining the evaluation score of the unlocking control quality according to the evaluation score and weight value of the unlocking evaluation index parameters. This implementation can clarify the control quality of the unlocking process of the vehicle's torque converter, optimize the vehicle's speed change control process, and further provide a reference for actual vehicle calibration, and provide guidance for improving vehicle driving comfort and improving vehicle performance.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle control technology, and specifically relates to a method for evaluating the unlocking control quality of a torque converter, which can be applied to the design and control quality evaluation of a torque converter unlocking control system of any integrated transmission device, AT transmission or other transmission device equipped with a torque converter. Background Art

[0002] A locking torque converter refers to a torque converter in which the pump wheel and the turbine are locked together through a locking clutch. When locked, the hydraulic transmission of the traditional torque converter can be converted into mechanical transmission, thereby reducing vehicle energy consumption.

[0003] During the unlocking process of the existing torque converter, there is no clear evaluation index to judge the control quality of the torque converter. Therefore, it is impossible to provide a reference for actual vehicle calibration. During the operation of the torque converter, it is necessary to take into account the goals of unlocking torque conversion and locking efficiency, which makes the vehicle's driving acceleration vary greatly and the driving comfort is low. Summary of the invention

[0004] In view of this, the present invention provides an evaluation method for the unlocking control quality of a torque converter, which can clarify the control quality-related indicators of the vehicle's torque converter unlocking process, optimize the vehicle's speed change control process, and further provide a reference for actual vehicle calibration, thereby providing guidance for improving vehicle driving comfort and improving vehicle performance.

[0005] The technical solution for implementing the present invention is as follows:

[0006] Receive unlocking instructions and collect turbine speed signals during the unlocking process;

[0007] Determining a plurality of unlocking evaluation index parameters according to the turbine speed signal;

[0008] Determine the evaluation score and weight value of the unlocking evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical unlocking evaluation index parameter;

[0009] An evaluation score of unlocking control quality is determined according to the evaluation score and the weight value of the unlocking evaluation index parameter.

[0010] Optionally, the unlocking instruction is a locking instruction, including:

[0011] Receive locking instructions and collect turbine speed signals during the locking process;

[0012] Determining a plurality of locking evaluation index parameters according to the turbine speed signal;

[0013] Determine the evaluation score and weight value of the lockout evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical lockout evaluation index parameter;

[0014] An evaluation score of the lockout control quality is determined according to the evaluation score and the weight value of the lockout evaluation index parameter.

[0015] Optionally, a plurality of locking evaluation index parameters are determined according to the turbine speed signal, including:

[0016] Determine the turbine speed change time and the turbine speed change value during the locking process according to the turbine speed signal;

[0017] The locking evaluation index parameter is determined according to the turbine speed change time and the turbine speed change value.

[0018] Optionally, the lockout evaluation index parameter includes: lockout time, turbine speed overshoot and turbine speed fluctuation times; determining the lockout evaluation index parameter according to the turbine speed change time and the turbine speed change value includes:

[0019] Determine the locking time according to the locking instruction receiving time, the turbine speed change time and the turbine speed change value;

[0020] The turbine speed overshoot amount and the turbine speed fluctuation number are determined according to the turbine speed change time and the turbine speed change value.

[0021] Optionally, determining the evaluation score of the lockout control quality according to the evaluation score and the weight value of the lockout evaluation index parameter includes:

[0022] The evaluation score of the lockup control quality is determined according to the first evaluation score and the first weight value of the lockup time, the second evaluation score and the second weight value of the turbine speed overshoot, and the third evaluation score and the third weight value of the turbine speed fluctuation number.

[0023] Optionally, the unblocking instruction is an unlocking instruction, comprising:

[0024] Receive an unlocking instruction and collect a turbine speed signal during the unlocking process;

[0025] determining a plurality of unlocking evaluation index parameters according to the turbine speed signal;

[0026] Determine the evaluation score and weight value of the unlocking evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical unlocking evaluation index parameter;

[0027] An evaluation score of unlocking control quality is determined according to the evaluation score and the weight value of the unlocking evaluation index parameter.

[0028] Optionally, determining a plurality of unlocking evaluation index parameters according to the turbine speed signal includes:

[0029] Determining the turbine speed change time and the turbine speed change value during the unlocking process according to the turbine speed signal;

[0030] The unlocking evaluation index parameter is determined according to the turbine speed change time and the turbine speed change value.

[0031] Optionally, the unlocking evaluation index parameter includes: unlocking time, turbine speed overshoot and turbine speed fluctuation times; determining the unlocking evaluation index parameter according to the turbine speed change time and the turbine speed change value includes:

[0032] Determining the unlocking time according to the unlocking instruction receiving time, the turbine speed change time and the turbine speed change value;

[0033] The turbine speed overshoot amount and the turbine speed fluctuation number are determined according to the turbine speed change time and the turbine speed change value.

[0034] Optionally, determining the evaluation score of the unlocking control quality according to the evaluation score and the weight value of the unlocking evaluation index parameter includes:

[0035] The evaluation score of the unlocking control quality is determined according to the fourth evaluation score and fourth weight value of the unlocking time, the fifth evaluation score and fifth weight value of the turbine speed overshoot, and the sixth evaluation score and sixth weight value of the turbine speed fluctuation number.

[0036] Beneficial effect: Because the evaluation score and weight value of the unlocking evaluation index parameter in the unlocking control process of the torque converter are determined according to the turbine speed signal in the unlocking control process of the torque converter, and then the evaluation score of the unlocking control quality of the torque converter is determined by the technical means, the technical problem that the existing torque converter cannot provide a reference for the actual vehicle calibration during the unlocking process, resulting in low vehicle driving comfort, etc. is overcome, thereby achieving the goal of clarifying the control quality of the vehicle's torque converter during the unlocking process, optimizing the vehicle's speed change control process, and then providing a reference for the actual vehicle calibration, providing guidance for improving the vehicle's driving comfort and improving vehicle performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the main process of a method for evaluating the unlocking control quality of a torque converter according to an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the main process of a method for evaluating the locking control quality of a torque converter according to an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of a locking curve according to an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the main process of a method for determining locking evaluation index parameters according to an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the main process of a method for evaluating the unlocking control quality of a torque converter according to an embodiment of the present invention;

[0042] Figure 6 is a schematic diagram of an unlocking curve according to an embodiment of the present invention;

[0043] Figure 7 Schematic diagram of the main process of a method for determining unlocking evaluation index parameters according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0045] Figure 1 is a schematic diagram of the main process of the method for evaluating the unlocking control quality of a torque converter according to an embodiment of the present invention, such as Figure 1 As shown, the evaluation method of the torque converter unlocking control quality of the present invention comprises the following steps:

[0046] Step 101, receiving an unlocking instruction and collecting a turbine speed signal during the unlocking process.

[0047] In the embodiment of the present invention, the unlocking instruction includes a locking instruction and an unlocking instruction, and accordingly, the unlocking process includes a locking process and an unlocking process.

[0048] Step 102: determining a plurality of unlocking evaluation index parameters according to the turbine speed signal.

[0049] In the embodiment of the present invention, the unlocking evaluation index parameter includes a locking evaluation index parameter and an unlocking evaluation index parameter.

[0050] Step 103, determining the evaluation score and weight value of the unlocking evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical unlocking evaluation index parameter.

[0051] Step 104: Determine the evaluation score of the locking control quality and the evaluation score of the unlocking control quality according to the evaluation score and the weight value of the unlocking evaluation index parameter.

[0052] In the embodiment of the present invention, the evaluation score of the locking control quality and the evaluation score of the unlocking control quality include the evaluation score of the locking control quality and the evaluation score of the unlocking control quality.

[0053] Figure 2 is a schematic diagram of the main process of the method for evaluating the locking control quality of a torque converter according to an embodiment of the present invention, such as Figure 2 As shown, the method for evaluating the locking control quality of a torque converter of the present invention comprises the following steps:

[0054] Step 201, receiving a locking instruction and collecting a turbine speed signal during the locking process.

[0055] In the embodiment of the present invention, after receiving the locking command, during the locking process of the torque converter, the turbine speed signal during the locking process is collected.

[0056] Furthermore, after receiving the locking command, during the locking process of the torque converter, an engine speed signal during the locking process is collected.

[0057] In the embodiment of the present invention, the speed signals of different throttle openings and different gears during the locking process can be collected as needed. The throttle opening range can be 0-100%, and the gear can be 1st gear to 5th gear of an automatic transmission vehicle.

[0058] Step 202: Determine a plurality of locking evaluation index parameters according to the turbine speed signal.

[0059] In the embodiment of the present invention, the turbine speed signal is filtered and converted into a turbine speed in a standard unit (ie, engineering unit) that changes with time.

[0060] Furthermore, the engine speed signal is filtered and converted into an engine speed in a standard unit that changes with time.

[0061] In the embodiment of the present invention, the lockout evaluation index parameters include the lockout time T lock , turbine speed overshoot Δn lock and turbine speed fluctuation number N lock .

[0062] In the embodiment of the present invention, Figure 3 As shown, the locking curve of the present invention when the throttle opening is 50% and the gear is 3rd during the locking process includes the change curves of the engine speed, the turbine speed and the ideal turbine speed, so that the locking evaluation index parameters can be clearly determined based on the change curve.

[0063] In the embodiment of the present invention, Figure 4 As shown, the method for determining the locking evaluation index parameter according to the embodiment of the present invention comprises the following steps:

[0064] Step 401, determining the turbine speed change time and turbine speed change value during the locking process according to the turbine speed signal.

[0065] In the embodiment of the present invention, the turbine speed change time and the turbine speed change value of the turbine speed during the locking process are determined according to the turbine speed signal.

[0066] Further, according to the engine speed signal, an engine speed change time and an engine speed change value of the engine speed during the locking process are determined.

[0067] Step 402, determining a locking evaluation index parameter according to the turbine speed change time and the turbine speed change value.

[0068] Step 4021, determine the lockout time T lock .

[0069] In the embodiment of the present invention, the locking time T is determined according to the locking instruction receiving time, the turbine speed change time and the turbine speed change value. lock .

[0070] For example, the locking time T is determined according to the locking command receiving time and the turbine speed locking deviation point time. lock is the difference between the turbine speed lock deviation point time and the instruction receiving time. The turbine speed lock deviation point indicates the time when the turbine speed determined according to the turbine speed signal begins to deviate from the ideal turbine speed after receiving the lock instruction; wherein the ideal turbine speed can be pre-stored in the standard database.

[0071] Alternatively, the locking time is determined based on the locking command reception time, the turbine speed change time and the turbine speed change value, and the engine speed change time and the engine speed change value.

[0072] For example, according to the blocking instruction receiving time and the KISS point time, determine the blocking time T lock It is the difference between the KISS point time and the time when the locking command is received; wherein the KISS point indicates the time when the engine speed is equal to the turbine speed for the first time determined according to the engine speed signal and the turbine speed signal after the locking command is received.

[0073] Step 4022, determine the turbine speed overshoot Δn lock .

[0074] In the embodiment of the present invention, turbine speed overshoot refers to the deviation of turbine speed from the ideal turbine speed, and turbine speed variation time is the time when turbine speed deviates from the ideal turbine speed (or turbine speed overshoot time).

[0075] In the embodiment of the present invention, the turbine speed peak value n within the turbine speed change time is determined according to the turbine speed change time and the turbine speed change value. p_lock and turbine speed trough value n v_lock According to the peak value of turbine speed n p_lock and turbine speed trough value n v_lock , determine the turbine speed overshoot peak value Δn during the turbine speed change time p_lock and turbine speed overshoot valley Δn v_lock Among them, the turbine speed overshoot peak value Δn p_lock for:

[0076] Δn p_lock =|n p_lock -n ref_lock |

[0077] Turbine speed overshoot valley value Δn v_lock for:

[0078] Δn v_lock =|n v_lock -n ref_lock |

[0079] Where n p_lock It is the peak value of turbine speed wave determined according to the locking curve during the turbine speed change time after the torque converter is locked;

[0080] Δn p_lock It is the absolute difference between the peak value of the turbine speed wave and the ideal turbine speed during the turbine speed change time after the torque converter is locked;

[0081] n v_lock It is the turbine speed trough value determined according to the locking curve during the turbine speed change time after the torque converter is locked;

[0082] Δn v_lock It is the absolute difference between the turbine speed valley value and the ideal turbine speed during the turbine speed change time after the torque converter is locked;

[0083] n ref_lock is the time period of turbine speed change determined by the locking curve after the torque converter is locked under ideal conditions and n p_lock 、n v_lock The ideal turbine speed corresponding to the time of occurrence; where n ref_lockIt can be determined by querying a standard database, which may include ideal turbine speed curves for locking processes at different throttle openings and different gears.

[0084] In the embodiment of the present invention, the turbine speed overshoot Δn lock The maximum difference between the turbine speed and the ideal turbine speed during the turbine speed change time. lock for:

[0085] Δn lock =max{Δn p_lock1 , Δn p_lock2 , Δn p_lock3 ,…,Δn v_lock1 , Δn v_lock2 , Δn v_lock3 , …}

[0086] In the formula, Δn p_lock1 , Δn p_lock2 , Δn p_lock3 , …are multiple turbine speed overshoot peak values ​​within the turbine speed change time after the torque converter is locked;

[0087] Δn v_lock1 , Δn v_lock2 , Δn v_lock3 , …are multiple turbine speed overshoot valley values ​​within the turbine speed change time after the torque converter is locked.

[0088] Step 4023, determine the number of turbine speed fluctuations N lock .

[0089] In the embodiment of the present invention, the turbine speed fluctuation number N is determined according to the turbine speed change time and the turbine speed change value. lock Turbine speed fluctuation refers to the phenomenon that the turbine speed deviates from the ideal turbine speed and fluctuates during the turbine speed change period.

[0090] In the embodiment of the present invention, during the turbine speed variation time, each time a peak or a trough appears in the turbine speed, it can be identified as a fluctuation of the turbine speed.

[0091] Furthermore, according to the turbine speed peak value n during the turbine speed change time, p_lock and turbine speed trough value n v_lock , determine the number of turbine speed fluctuations N lock . Turbine speed fluctuation number N lock is the peak value of turbine speed wave n during the turbine speed change time p_lock Or the turbine speed trough value n v_lock The turbine speed overshoot ratio R compared to the ideal turbine speedlock The number of times the turbine speed peak overshoot rate R p_lock for:

[0092] R p_lock =Δn p_lock / n ref_lock

[0093] Turbine speed trough overshoot rate R v_lock for:

[0094] R v_lock =Δn v_lock / n ref_lock

[0095] In the formula, R p_lock The peak value n of the turbine speed wave during the turbine speed change time after the torque converter is locked. p_lock Determine the turbine speed peak overshoot rate;

[0096] R v_lock After the torque converter is locked, the turbine speed changes according to the turbine speed trough value n v_lock Determine the turbine speed valley overshoot ratio.

[0097] In the embodiment of the present invention, according to the turbine speed peak overshoot rate R p_lock and turbine speed trough overshoot rate R v_lock Determine the number of turbine speed fluctuations N lock Among them, the number of turbine speed fluctuations N lock is the turbine speed peak overshoot rate R p_lock and turbine speed trough overshoot rate R v_lock More than 15% of the time.

[0098] Step 203, determining the evaluation score and weight value of the locking evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical locking evaluation index parameter.

[0099] In the embodiment of the present invention, the evaluation scores and weight values ​​of the locking evaluation index parameters determined in step 202 are queried according to the standard database, for example, the locking time T lock The evaluation score is V_T lock , turbine speed overshoot Δn lock The evaluation score is V_Δn lock , turbine speed fluctuation times N lock The evaluation score is V_N lock ; Locking time T lock The weight value is w1, the turbine speed overshoot Δn lock The weight value is w2, the number of turbine speed fluctuations N lockThe weight value is w3.

[0100] In the embodiment of the present invention, the standard database includes the value ranges of various locking evaluation index parameters under different throttle openings and different gears, as well as the corresponding evaluation scores and weight values.

[0101] Step 204: Determine the evaluation score of the lockout control quality according to the evaluation score and weight value of the lockout evaluation index parameter.

[0102] In the embodiment of the present invention, the evaluation score V of the locking control quality is determined according to the evaluation score and weight value of the locking evaluation index parameter in the locking process of the torque converter determined in step 203. lock Among them, the evaluation score of the locking control quality is V lock for:

[0103]

[0104] According to the technical solution of the embodiment of the present invention, the evaluation score of the locking control quality of the torque converter locking control process can be clarified, the locking control process of the torque converter can be optimized, and then a reference for actual vehicle calibration can be provided, thereby improving vehicle driving comfort, etc., and improving the performance of automatic transmission vehicles.

[0105] Figure 5 Schematic diagram of the main process of evaluating the unlocking control quality of the torque converter according to an embodiment of the present invention, such as Figure 5 As shown, the evaluation method of the torque converter unlocking control quality of the present invention includes the following steps:

[0106] Step 501, receiving an unlocking instruction and collecting a turbine speed signal during the unlocking process.

[0107] In the embodiment of the present invention, after receiving the unlocking instruction, during the unlocking process of the torque converter, the turbine speed signal during the unlocking process is collected.

[0108] In the embodiment of the present invention, the speed signals at different throttle openings and different gears during the unlocking process can be collected as needed.

[0109] Step 502: Determine a plurality of unlocking evaluation index parameters according to the turbine speed signal.

[0110] In the embodiment of the present invention, the turbine speed signal is filtered and converted into a turbine speed in a standard unit (ie, engineering unit) that changes with time.

[0111] In the embodiment of the present invention, the unlocking evaluation index parameter includes the unlocking time T unlock , turbine speed overshoot Δn unlock and turbine speed fluctuation number N unlock .

[0112] In the embodiment of the present invention, Figure 6 As shown, the unlocking curve of the present invention when the throttle opening is 50% and the gear is 3rd gear during the unlocking process includes the change curve of the turbine speed and the ideal turbine speed, so that the unlocking evaluation index parameter can be determined according to the change curve.

[0113] In the embodiment of the present invention, Figure 7 As shown, the method for determining unlocking evaluation index parameters according to an embodiment of the present invention includes the following steps:

[0114] Step 701, determining the turbine speed change time and turbine speed change value during the unlocking process according to the turbine speed signal.

[0115] In the embodiment of the present invention, the turbine speed change time and the turbine speed change value of the turbine speed during the unlocking process are determined according to the turbine speed signal.

[0116] Step 702: Determine unlocking evaluation index parameters according to the turbine speed change time and the turbine speed change value.

[0117] Step 7021, determine the unlocking time T unlock .

[0118] In the embodiment of the present invention, the unlocking time T is determined according to the unlocking instruction receiving time, the turbine speed change time and the turbine speed change value. unlock .

[0119] For example, the unlocking time T is determined according to the unlocking command receiving time and the turbine speed unlocking deviation point time. unlock The difference between the turbine speed unlocking deviation point time and the unlocking command receiving time. The turbine speed unlocking deviation point time indicates the time when the turbine speed determined according to the turbine speed signal begins to deviate from the ideal turbine speed after receiving the unlocking command.

[0120] Step 7022, determine the turbine speed overshoot Δn unlock .

[0121] In the embodiment of the present invention, the turbine speed peak value n within the turbine speed change time is determined according to the turbine speed change time and the turbine speed change value. p_unlock and turbine speed trough value n v_unlock According to the peak value of turbine speed n p_unlock and turbine speed trough value n v_unlock , determine the turbine speed overshoot peak value Δn during the turbine speed change time p_unlock and turbine speed overshoot valley Δn v_unlock Among them, the turbine speed overshoot peak value Δn p_unlock for:

[0122] Δn p_unlock =|n p_unlock -n ref_unlock |

[0123] Turbine speed overshoot valley value Δn v_unlock for:

[0124] Δn v_unlock =|n v_unlock -n ref_unlock |

[0125] Where n p_unlock It is the peak value of turbine speed wave determined according to the unlocking curve during the turbine speed change time after the torque converter is unlocked;

[0126] Δn p_unlock It is the absolute difference between the peak value of the turbine speed wave and the ideal turbine speed during the turbine speed change time after the torque converter is unlocked;

[0127] n v_unlock It is the turbine speed trough value determined according to the unlocking curve during the turbine speed change time after the torque converter is unlocked;

[0128] Δn v_unlock It is the absolute difference between the turbine speed valley value and the ideal turbine speed during the turbine speed change time after the torque converter is unlocked;

[0129] n ref_unlock is the time period of turbine speed change determined by the unlocking curve after the torque converter is unlocked under ideal conditions and n p_unlock 、n v_unlock The ideal turbine speed corresponding to the time of occurrence; where n ref_unlock It can be determined by querying a standard database, which may include ideal turbine speed curves for unlocking processes at different throttle openings and different gears.

[0130] In the embodiment of the present invention, the turbine speed overshoot Δn unlock The maximum difference between the turbine speed and the ideal turbine speed during the turbine speed change time. unlock for:

[0131] Δn unlock =max{Δn p_unlock1 , Δn p_unlock2 , Δn p_unlock3 ,…,Δn v_unlock1 , Δn v_unlock2 ,

[0132] Δn v_unlock3 , …}

[0133] In the formula, Δn p_unlock1 , Δn p_unlock2 , Δn p_unlock3 , …are multiple turbine speed overshoot peak values ​​within the turbine speed change time after the torque converter is unlocked;

[0134] Δn v_unlock1 , Δn v_unlock2 , Δn v_unlock3 , …are multiple turbine speed overshoot valley values ​​within the turbine speed change time after the torque converter is unlocked.

[0135] Step 7023, determine the number of turbine speed fluctuations N unlock .

[0136] In the embodiment of the present invention, the turbine speed fluctuation number N is determined according to the turbine speed change time and the turbine speed change value. unlock .

[0137] Furthermore, according to the turbine speed peak value n during the turbine speed change time, p_unlock and turbine speed trough value n v_unlock , determine the number of turbine speed fluctuations N unlock . Turbine speed fluctuation number N unlock is the peak value of turbine speed wave n during the turbine speed change time p_unlock Or the turbine speed trough value n v_unlock The turbine speed overshoot ratio R compared to the ideal turbine speed unlock The number of times the turbine speed peak overshoot rate R p_unlock for:

[0138] R p_unlock =Δn p_unlock / n ref_unlock

[0139] Turbine speed trough overshoot rate R v_unlock for:

[0140] R v_unlock =Δn v_unlock / n ref_unlock

[0141] In the formula, R p_unlock After the torque converter is unlocked, the turbine speed changes during the turbine speed change period according to the turbine speed peak value n p_unlock Determine the turbine speed peak overshoot rate;

[0142] R v_unlock After the torque converter is unlocked, the turbine speed changes during the turbine speed change period according to the turbine speed trough value n v_unlock Determine the turbine speed valley overshoot ratio.

[0143] In the embodiment of the present invention, according to the turbine speed peak overshoot rate R p_unlock and turbine speed trough overshoot rate R v_unlock Determine the number of turbine speed fluctuations N unlock Among them, the number of turbine speed fluctuations N unlock is the turbine speed peak overshoot rate R p_unlock and turbine speed trough overshoot rate R v_unlock More than 15% of the time.

[0144] Step 703, determining the evaluation score and weight value of the unlocking evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical unlocking evaluation index parameters.

[0145] In the embodiment of the present invention, the evaluation score and weight value of the unlocking evaluation index parameter determined in step 702 are queried according to the standard database, for example, the unlocking time T unlock The evaluation score is V_T unlock , turbine speed overshoot Δn unlock The evaluation score is V_Δn unlock , turbine speed fluctuation times N unlock The evaluation score is V_N unlock ; Unlock time T unlock The weight value is w4, the turbine speed overshoot Δn unlock The weight value is w5, the number of turbine speed fluctuations N unlock The weight value is w6.

[0146] In the embodiment of the present invention, the standard database includes the value ranges of various unlocking evaluation index parameters under different throttle openings and different gears, as well as the corresponding evaluation scores and weight values.

[0147] Step 704: Determine the evaluation score of the unlocking control quality according to the evaluation score and weight value of the unlocking evaluation index parameter.

[0148] In the embodiment of the present invention, the evaluation score V of the unlocking control quality is determined according to the evaluation score and weight value of the unlocking evaluation index parameter in the process of unlocking the torque converter determined in step 703. unlock Among them, the evaluation score of unlocking control quality is V unlock for:

[0149]

[0150] According to the technical solution of the embodiment of the present invention, the evaluation score of the unlocking control quality of the torque converter unlocking control process can be clarified, the torque converter unlocking control process can be optimized, and then a reference for actual vehicle calibration can be provided, thereby improving vehicle driving comfort, etc., and improving the performance of automatic transmission vehicles.

[0151] According to the technical solution of the embodiment of the present invention, it is possible to clarify the control quality related indicators of the vehicle's torque converter unlocking process, optimize the vehicle's speed change control process, and provide a reference for actual vehicle calibration, thereby providing guidance for improving vehicle driving comfort and improving vehicle performance.

[0152] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for evaluating the unlocking control quality of a torque converter, characterized in that: include: Receive unlocking instructions and collect turbine speed signals during the unlocking process; Determining a plurality of unlocking evaluation index parameters according to the turbine speed signal; Determine the evaluation score and weight value of the unlocking evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical unlocking evaluation index parameter; Determining an evaluation score of unlocking control quality according to the evaluation score and the weight value of the unlocking evaluation index parameter; The unlocking instruction is a locking instruction, including: Receive locking instructions and collect turbine speed signals during the locking process; Determining a plurality of locking evaluation index parameters according to the turbine speed signal; Determine the evaluation score and weight value of the lockout evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical lockout evaluation index parameter; Determining an evaluation score of the lockout control quality according to the evaluation score and the weight value of the lockout evaluation index parameter; According to the turbine speed signal, a plurality of locking evaluation index parameters are determined, including: Determine the turbine speed change time and the turbine speed change value during the locking process according to the turbine speed signal; Determine the locking evaluation index parameter according to the turbine speed change time and the turbine speed change value; The locking evaluation index parameters include: locking time, turbine speed overshoot and turbine speed fluctuation times; determining the locking evaluation index parameters according to the turbine speed change time and the turbine speed change value includes: Determine the locking time according to the locking instruction receiving time, the turbine speed change time and the turbine speed change value; Determine the turbine speed overshoot and the turbine speed fluctuation number according to the turbine speed change time and the turbine speed change value; Determining the evaluation score of the lockout control quality according to the evaluation score and the weight value of the lockout evaluation index parameter includes: The evaluation score of the lockup control quality is determined according to the first evaluation score and the first weight value of the lockup time, the second evaluation score and the second weight value of the turbine speed overshoot, and the third evaluation score and the third weight value of the turbine speed fluctuation number.

2. The method according to claim 1, characterized in that The unlocking instruction is an unlocking instruction, including: Receive an unlocking instruction and collect a turbine speed signal during the unlocking process; determining a plurality of unlocking evaluation index parameters according to the turbine speed signal; Determine the evaluation score and weight value of the unlocking evaluation index parameter according to the standard database; wherein the standard database is obtained according to the historical unlocking evaluation index parameter; An evaluation score of unlocking control quality is determined according to the evaluation score and the weight value of the unlocking evaluation index parameter.

3. The method according to claim 2, characterized in that Determining a plurality of unlocking evaluation index parameters according to the turbine speed signal includes: Determining the turbine speed change time and the turbine speed change value during the unlocking process according to the turbine speed signal; The unlocking evaluation index parameter is determined according to the turbine speed change time and the turbine speed change value.

4. The method according to claim 3, characterized in that The unlocking evaluation index parameters include: unlocking time, turbine speed overshoot and turbine speed fluctuation times; determining the unlocking evaluation index parameters according to the turbine speed change time and the turbine speed change value includes: Determining the unlocking time according to the unlocking instruction receiving time, the turbine speed change time and the turbine speed change value; The turbine speed overshoot amount and the turbine speed fluctuation number are determined according to the turbine speed change time and the turbine speed change value.

5. The method according to claim 4, characterized in that The step of determining the evaluation score of the unlocking control quality according to the evaluation score and the weight value of the unlocking evaluation index parameter includes: The evaluation score of the unlocking control quality is determined according to the fourth evaluation score and fourth weight value of the unlocking time, the fifth evaluation score and fifth weight value of the turbine speed overshoot, and the sixth evaluation score and sixth weight value of the turbine speed fluctuation number.

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