A method and system for reminding abnormal vehicle starting

Abstract

The present invention provides a vehicle start abnormality reminder method and system, the method comprising: determining the initial start process cycle of the vehicle; determining the synchronization coefficient under different gears based on the gearbox output shaft speed, standard gearbox speed ratio data and engine speed, and drawing the synchronization coefficient curves of different gears; using the peak recognition principle to identify the synchronization coefficient curve to obtain the vehicle start segment; using a preset recognition algorithm to obtain the vehicle start gear, and calculating the one-axis speed under the vehicle start gear; calculating the one-axis speed and the engine speed under the start gear to determine the sliding friction work at the start time; judging the vehicle start gear and the sliding friction work at the start time based on the start judgment model, and outputting a driving reminder signal when there is a start abnormality. The present invention can identify abnormal vehicle start behavior and remind the driver in real time to avoid clutch failure caused by improper start of the driver.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a method and system for reminding of abnormal vehicle starting. Background Art

[0002] The clutch is installed between the engine and the transmission. It is a component that transmits and cuts off power between the vehicle's transmission system and the engine. During the entire process from starting to normal driving, the driver can operate the clutch as needed to temporarily separate or gradually combine the engine and transmission system to cut off or transmit the power output from the engine to the transmission system.

[0003] One of the functions of the clutch is to allow the engine and transmission to gradually combine, thereby ensuring a smooth start of the car. However, in actual use, many drivers use high gear to start, causing abnormal wear of the clutch friction plate, which leads to an increase in the failure rate of the clutch.

[0004] Therefore, how to identify and regulate the driver's starting behavior to reduce the failure rate of the clutch has become an urgent problem to be solved by the current technical field staff. Summary of the invention

[0005] In view of this, it is necessary to provide a method and system for reminding the driver of abnormal vehicle starting, so as to achieve the purpose of identifying and regulating the driver's starting behavior to reduce the failure rate of the clutch.

[0006] In order to achieve the above object, the present invention provides a method for reminding a vehicle of abnormal starting, comprising:

[0007] Continuously collect vehicle status data, determine whether the vehicle meets the starting conditions based on the vehicle status data, and obtain an initial starting process cycle when the starting conditions are met;

[0008] querying the standard transmission speed ratio data of each gear of the vehicle, calculating the first shaft speed of the vehicle at different gears based on the transmission output shaft speed and the standard transmission speed ratio data of each gear, determining the synchronization coefficient at different gears based on the first shaft speed and the engine speed at different gears, and drawing the synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence;

[0009] The synchronization coefficient curves of different gears are identified using the peak recognition principle to obtain the vehicle starting segment;

[0010] Analyze the synchronization coefficient of the vehicle starting segment by using a preset recognition algorithm to obtain the vehicle starting gear, and calculate the rotation speed of one shaft in the vehicle starting gear;

[0011] The linear interpolation method is used to calculate the speed of one shaft and the engine speed at the vehicle starting gear to determine the sliding friction work at the starting moment;

[0012] The vehicle's starting gear and the slippage work at the starting time are judged based on the starting judgment model, and a driving reminder signal is output when there is an abnormal starting condition.

[0013] In a possible implementation, collecting vehicle status data, determining whether the vehicle meets a starting condition based on the vehicle status data, and when the starting condition is met, obtaining an initial starting process cycle includes:

[0014] Collect vehicle status data, including current vehicle speed data and throttle opening and closing data;

[0015] When it is identified that the current vehicle speed data is continuously 0 within a preset period and the throttle opening and closing data is greater than 0, it is determined that the current vehicle is in a starting state, and the end time node of the preset period is used as the starting time point, and the preset starting period is the vehicle starting process period.

[0016] In a possible implementation, querying the standard transmission ratio data of each gear of the vehicle, calculating the one-shaft speed of the vehicle at different gears based on the transmission output shaft speed and the standard transmission ratio data of each gear, determining the synchronization coefficient at different gears based on the one-shaft speed and the engine speed at different gears, and drawing the synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence includes:

[0017] Query the standard gearbox speed ratio data of each gear of the vehicle on the cloud platform according to the vehicle's chassis number;

[0018] Calculate the vehicle's shaft speed at different gears based on the gearbox output shaft speed and the standard gearbox speed ratio data of each gear;

[0019] Determine the synchronization coefficient under different gears based on the rotation speed of one shaft and the engine speed under different gears;

[0020] Draw the synchronization coefficient curves of different gears according to the time sequence;

[0021] Among them, the calculation formula of the speed of one shaft under different gears is:

[0022] One shaft speed = gearbox output shaft speed x standard gearbox ratio of the current gear.

[0023] In a possible implementation, the calculation formula of the synchronization coefficient under different gears is:

[0024] Synchronization coefficient = shaft speed / engine speed.

[0025] In a possible implementation, the synchronization coefficient curves of different gears are identified using the peak recognition principle, and the vehicle starting segment includes:

[0026] The first peak time node of the synchronization coefficient curve of different gears is identified, and the starting time point to the first peak time node is the vehicle starting segment.

[0027] In a possible implementation, a preset recognition algorithm is used to analyze the synchronization coefficient of the vehicle starting segment to obtain the vehicle starting gear, including:

[0028] The synchronization coefficients at each moment in the vehicle start segment are screened out to form a synchronization coefficient set, and the marking value of the synchronization coefficient is determined based on the synchronization coefficient marking rule, and the time point corresponding to the synchronization coefficient closest to 1 in the synchronization coefficient set is taken as the target time point, the time point before the target time point is taken as the previous time point, and the time point after the target time point is taken as the next time point. The difference between the synchronization coefficient at the target time point and the previous time point is calculated to obtain a first synchronization coefficient difference, and the difference between the synchronization coefficient at the target time point and 1 is calculated to obtain a second synchronization coefficient difference;

[0029] The gear recognition rule is used to judge the synchronization coefficient of the previous time point, the synchronization coefficient of the target time point, the synchronization coefficient of the next time point, the first synchronization coefficient difference and the second synchronization coefficient difference to obtain the vehicle starting gear.

[0030] In a possible implementation, the synchronization coefficient marking rule determines the marking value of the synchronization coefficient including:

[0031] When the synchronization coefficient is within the synchronization coefficient threshold range, the mark value of the synchronization coefficient is 1, and when the synchronization coefficient is outside the synchronization coefficient threshold, the mark value of the synchronization coefficient is 0;

[0032] The number of gears of a vehicle includes first gear, second gear, third gear, fourth gear and fifth gear, and the gear identification rules include:

[0033] When the mark value of the synchronization coefficient at the target time point is 1, and the mark value of the synchronization coefficient at the previous time point or the mark value at the next time point is 1, the vehicle start mark is 1;

[0034] When the mark value of the synchronization coefficient at the target time point is 1, and the first synchronization coefficient difference and the second synchronization coefficient difference are both the minimum values ​​of the corresponding values ​​in the synchronization coefficient, the vehicle start mark is 2;

[0035] When the mark value of the synchronization coefficient at the target time point is 1, and the first synchronization coefficient difference is the minimum value of the corresponding value in the synchronization coefficient, but the second synchronization coefficient difference is not the minimum value of the corresponding value in the synchronization coefficient, the vehicle starting gear mark is 3;

[0036] When the mark value of the synchronization coefficient at the target time point is 0, the first synchronization coefficient difference and the second synchronization coefficient difference are both the minimum values ​​of the corresponding values ​​in the synchronization coefficient, and the second synchronization coefficient difference is greater than or equal to 0.8, the vehicle starting gear mark is 4;

[0037] The mark value of the synchronization coefficient at the target time point is 0, the first synchronization coefficient difference and the second synchronization coefficient difference are both the minimum values ​​of the corresponding values ​​in the synchronization coefficient, and the second synchronization coefficient difference is less than 0.8, then the vehicle starting gear mark is 5;

[0038] The minimum value of the vehicle gear mark value is determined to be the vehicle starting gear.

[0039] In a possible implementation, a linear interpolation method is used to calculate the shaft speed and the engine speed at the vehicle starting gear, and the sliding friction work at the starting time is determined to include:

[0040] The engine speed, the one-axis speed and the engine torque between every two adjacent moments in the vehicle starting segment are interpolated into a preset number of points according to a linear interpolation method, and the sliding friction work at the starting moment is calculated based on the sliding friction work calculation formula;

[0041] Among them, the calculation formula of sliding friction work at the starting time is:

[0042] Sliding work = |engine speed - shaft speed| x engine torque / preset points.

[0043] In a possible implementation, the vehicle starting gear and the slip work at the starting time are judged based on the starting judgment model, and when there is a starting abnormality, the driving reminder signal is outputted, including:

[0044] When the slip power at the start time is not greater than the preset slip power threshold, no driving reminder signal is output;

[0045] When the sliding friction work at the start time is greater than the preset sliding friction work threshold, and the vehicle starting gear is greater than the preset starting gear threshold, a gear too high driving reminder signal is output;

[0046] When the slippage work at the start time is greater than the preset slippage work threshold, and the vehicle's starting gear is not greater than the preset starting gear threshold, an over-speed driving reminder signal is output.

[0047] In order to achieve the above object, the present invention also provides a vehicle start abnormality reminder system, comprising:

[0048] A starting judgment module is used to continuously collect vehicle status data, judge whether the vehicle meets the starting conditions based on the vehicle status data, and obtain an initial starting process cycle when the starting conditions are met;

[0049] A synchronization curve drawing module is used to query the standard gearbox speed ratio data of each gear of the vehicle, calculate the one-shaft speed of the vehicle at different gears based on the gearbox output shaft speed and the standard gearbox speed ratio data of each gear, determine the synchronization coefficient at different gears based on the one-shaft speed and engine speed at different gears, and draw the synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence;

[0050] The vehicle starting segment recognition module is used to identify the synchronization coefficient curves of different gears by using the peak recognition principle to obtain the vehicle starting segment;

[0051] A vehicle starting gear position recognition module is used to analyze the synchronization coefficient of the vehicle starting segment using a preset recognition algorithm to obtain the vehicle starting gear position and calculate the rotation speed of one shaft under the vehicle starting gear position;

[0052] The sliding friction work calculation module is used to calculate the rotation speed of one shaft and the engine speed of the vehicle at the starting gear by using a linear interpolation method to determine the sliding friction work at the starting time;

[0053] The early warning reminder module is used to judge the vehicle's starting gear and the slip work at the starting time based on the starting judgment model, and output a driving reminder signal when there is an abnormal starting.

[0054] The beneficial effects of adopting the above embodiment are: determining the initial starting process cycle of the vehicle; determining the synchronization coefficient under different gears based on the gearbox output shaft speed, standard gearbox speed ratio data and engine speed, and drawing the synchronization coefficient curves of different gears; using the peak recognition principle to identify the synchronization coefficient curve to obtain the vehicle starting segment; using a preset recognition algorithm to obtain the vehicle starting gear, and calculate the one-axis speed under the vehicle starting gear; calculating the one-axis speed and engine speed under the starting gear to determine the sliding friction work at the starting time; judging the vehicle starting gear and the sliding friction work at the starting time based on the starting judgment model, and outputting a driving reminder signal when there is a starting abnormality. The present invention can identify abnormal vehicle starting behavior and remind the driver in real time to avoid clutch failure caused by improper starting by the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0056] Figure 1 A schematic flow chart of an embodiment of a method for reminding of abnormal vehicle starting provided by the present invention;

[0057] Figure 2 A synchronization coefficient variation curve diagram of an embodiment of a vehicle start abnormality reminder method provided by the present invention;

[0058] Figure 3 A graph showing the variation of synchronization coefficients of each gear position in an embodiment of a method for reminding a vehicle of abnormal starting provided by the present invention;

[0059] Figure 4 A schematic diagram of sliding friction work in a starting segment of an embodiment of a vehicle starting abnormality reminder method provided by the present invention;

[0060] Figure 5 The present invention is a schematic structural diagram of an embodiment of a vehicle abnormal start reminder system provided by the present invention. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0062] Some of the block diagrams shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0063] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0064] In the present invention, in order to ensure the efficient operation of the wind power generation system, the pulse width modulation converter on the stator side must meet the requirements of multiple control objectives at the same time. First, in order to ensure that the system has good input, the condition of DC voltage stability must be met; secondly, the pulse width modulation converter on the stator side must also provide a bidirectional power supply path for the pulse width modulation converter on the rotor end to meet the energy requirements of the rotor side of the deep-sea floating doubly fed wind turbine during supersynchronous and subsynchronous operation; at the same time, the pulse width modulation converter on the stator side must also perform steady-state control on the DC link voltage to ensure its output stable DC voltage. Therefore, the pulse width modulation converter on the stator side needs to meet multiple control objectives at the same time to ensure the stable and efficient operation of the wind power generation system.

[0065] Figure 1 The present invention is a flow chart of an embodiment of a method for reminding of abnormal vehicle starting provided by the present invention.

[0066] Reference Figure 1 The present invention provides a method for reminding a vehicle of abnormal starting, comprising:

[0067] S101, continuously collecting vehicle status data, determining whether the vehicle meets a starting condition based on the vehicle status data, and obtaining an initial starting process cycle when the starting condition is met;

[0068] S102, querying standard transmission speed ratio data of each gear of the vehicle, calculating the speed of one shaft of the vehicle at different gears based on the speed of the transmission output shaft and the standard transmission speed ratio data of each gear, determining the synchronization coefficient at different gears based on the speed of the one shaft and the engine speed at different gears, and drawing synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence;

[0069] S103, identifying synchronization coefficient curves of different gears by using the peak recognition principle to obtain a vehicle starting segment;

[0070] S104, analyzing the synchronization coefficient of the vehicle starting segment by using a preset recognition algorithm to obtain the vehicle starting gear, and calculating the rotation speed of one shaft in the vehicle starting gear;

[0071] S105, calculating the rotation speed of one shaft and the engine speed at the starting gear of the vehicle by using a linear interpolation method to determine the sliding friction work at the starting time;

[0072] S106: judging the vehicle starting gear and the slippage work at the starting time based on the starting judgment model, and outputting a driving reminder signal when there is a starting abnormality.

[0073] The beneficial effects of adopting the above embodiment are: determining the initial starting process cycle of the vehicle; determining the synchronization coefficient under different gears based on the gearbox output shaft speed, standard gearbox speed ratio data and engine speed, and drawing the synchronization coefficient curves of different gears; using the peak recognition principle to identify the synchronization coefficient curve to obtain the vehicle starting segment; using a preset recognition algorithm to obtain the vehicle starting gear, and calculate the one-axis speed under the vehicle starting gear; calculating the one-axis speed and engine speed under the starting gear to determine the sliding friction work at the starting time; judging the vehicle starting gear and the sliding friction work at the starting time based on the starting judgment model, and outputting a driving reminder signal when there is a starting abnormality. The present invention can identify abnormal vehicle starting behavior and remind the driver in real time to avoid clutch failure caused by improper starting by the driver.

[0074] In one embodiment, step S101 includes:

[0075] Collect vehicle status data, including current vehicle speed data and throttle opening and closing data;

[0076] When it is identified that the current vehicle speed data is continuously 0 within a preset period and the throttle opening and closing data is greater than 0, it is determined that the current vehicle is in a starting state, and the end time node of the preset period is used as the starting time point, and the preset starting period is the vehicle starting process period.

[0077] The above embodiment determines that the vehicle is in the starting state by identifying that the vehicle speed is continuously 0 but the throttle opening and closing is not 0 within a preset period. The identification process is convenient and efficient, and the starting period is preliminarily screened by identifying the preset starting period, avoiding the problem of large calculation amount caused by too large a period and inaccurate sampling results caused by too small a period.

[0078] In one embodiment, step S102 includes:

[0079] Query the standard gearbox speed ratio data of each gear of the vehicle on the cloud platform according to the vehicle's chassis number;

[0080] Calculate the vehicle's shaft speed at different gears based on the gearbox output shaft speed and the standard gearbox speed ratio data of each gear;

[0081] Determine the synchronization coefficient under different gears based on the rotation speed of one shaft and the engine speed under different gears;

[0082] Draw the synchronization coefficient curves of different gears according to the time sequence;

[0083] Among them, the calculation formula of the speed of one shaft under different gears is:

[0084] One shaft speed = gearbox output shaft speed x standard gearbox ratio of the current gear.

[0085] Specifically, the actual gearbox speed ratio i at each moment x =Engine speed / transmission output shaft speed. By comparing the actual transmission ratio at each moment with the standard transmission ratio data, the current gear of the vehicle can be roughly calculated. However, this method of determining the current gear of the vehicle has errors when the vehicle is in a semi-clutch state. Therefore, a more accurate method of determining the current gear is needed.

[0086] Figure 2 A synchronization coefficient variation curve diagram of an embodiment of a vehicle start abnormality reminder method provided by the present invention.

[0087] Reference Figure 2 , assuming that the current gear position of the vehicle is the first gear, then the shaft speed of the vehicle in the first gear state is the gearbox output shaft speed x the standard gearbox ratio of the first gear, and then determine the synchronization coefficient of the first gear, and draw the synchronization coefficient curve at this time to provide a data basis for the subsequent determination of the gear position of the current vehicle.

[0088] In one embodiment, the calculation formula of the synchronization coefficient under different gears is:

[0089] Synchronization coefficient = shaft speed / engine speed.

[0090] Each peak in the synchronization coefficient variation curve represents a gear shift, so by identifying the first peak time node of the synchronization coefficient variation curve, the end time of the vehicle start segment can be obtained.

[0091] Further, step S103 includes:

[0092] The first peak time node of the synchronization coefficient curve of different gears is identified, and the starting time point to the first peak time node is the vehicle starting segment.

[0093] Since the vehicle has already shifted gears at the first peak, the gear change is not within the starting gear sequence, so only the data within the vehicle starting segment needs to be calculated. The starting time point to the first peak time node is the vehicle starting segment, so as to confirm the vehicle's starting gear.

[0094] Figure 3 A graph showing changes in synchronization coefficients of various gears in accordance with an embodiment of a method for reminding of abnormal vehicle starting provided by the present invention.

[0095] Reference Figure 3 When the driver starts the vehicle, that is, the starting force of the driver in the vehicle starting segment is different, the gear position of the vehicle is changing. It is necessary to draw the change curve of the synchronization coefficient of each gear. By analyzing the synchronization coefficient of the vehicle starting segment, the representative gear position can be determined as the vehicle starting gear position.

[0096] In one embodiment, step S104 includes:

[0097] The synchronization coefficients at each moment in the vehicle start segment are screened out to form a synchronization coefficient set, and the marking value of the synchronization coefficient is determined based on the synchronization coefficient marking rule, and the time point corresponding to the synchronization coefficient closest to 1 in the synchronization coefficient set is taken as the target time point, the time point before the target time point is taken as the previous time point, and the time point after the target time point is taken as the next time point. The difference between the synchronization coefficient at the target time point and the previous time point is calculated to obtain a first synchronization coefficient difference, and the difference between the synchronization coefficient at the target time point and 1 is calculated to obtain a second synchronization coefficient difference;

[0098] The gear recognition rule is used to judge the synchronization coefficient of the previous time point, the synchronization coefficient of the target time point, the synchronization coefficient of the next time point, the first synchronization coefficient difference and the second synchronization coefficient difference to obtain the vehicle starting gear.

[0099] Furthermore, the synchronization coefficient marking rule determines the marking value of the synchronization coefficient including:

[0100] When the synchronization coefficient is within the synchronization coefficient threshold range, the mark value of the synchronization coefficient is 1, and when the synchronization coefficient is outside the synchronization coefficient threshold, the mark value of the synchronization coefficient is 0;

[0101] The number of gears of a vehicle includes first gear, second gear, third gear, fourth gear and fifth gear, and the gear identification rules include:

[0102] When the mark value of the synchronization coefficient at the target time point is 1, and the mark value of the synchronization coefficient at the previous time point or the mark value at the next time point is 1, the vehicle start mark is 1;

[0103] When the mark value of the synchronization coefficient at the target time point is 1, and the first synchronization coefficient difference and the second synchronization coefficient difference are both the minimum values ​​of the corresponding values ​​in the synchronization coefficient, the vehicle start mark is 2;

[0104] When the mark value of the synchronization coefficient at the target time point is 1, and the first synchronization coefficient difference is the minimum value of the corresponding value in the synchronization coefficient, but the second synchronization coefficient difference is not the minimum value of the corresponding value in the synchronization coefficient, the vehicle starting gear mark is 3;

[0105] When the mark value of the synchronization coefficient at the target time point is 0, the first synchronization coefficient difference and the second synchronization coefficient difference are both the minimum values ​​of the corresponding values ​​in the synchronization coefficient, and the second synchronization coefficient difference is greater than or equal to 0.8, the vehicle starting gear mark is 4;

[0106] The mark value of the synchronization coefficient at the target time point is 0, the first synchronization coefficient difference and the second synchronization coefficient difference are both the minimum values ​​of the corresponding values ​​in the synchronization coefficient, and the second synchronization coefficient difference is less than 0.8, then the vehicle starting gear mark is 5;

[0107] The minimum value of the vehicle gear mark value is determined to be the vehicle starting gear.

[0108] It can be understood that the synchronization coefficient threshold range can be flexibly set according to the vehicle type, for example: the synchronization coefficient threshold range is: 0.915~1.01.

[0109] The above gear recognition rules can be used to quickly and efficiently identify the vehicle's starting gear, thereby determining whether the vehicle's starting gear is too high, causing damage to the clutch.

[0110] Figure 4 A schematic diagram of sliding friction work in a starting segment of an embodiment of a vehicle starting abnormality reminder method provided by the present invention.

[0111] Reference Figure 4 , the linear interpolation method is used to calculate the shaft speed and engine speed of the vehicle at the starting gear, and the sliding friction work at the starting time is determined to include:

[0112] The engine speed, the one-axis speed and the engine torque between every two adjacent moments in the vehicle starting segment are interpolated into a preset number of points according to a linear interpolation method, and the sliding friction work at the starting moment is calculated based on the sliding friction work calculation formula;

[0113] Among them, the calculation formula of sliding friction work at the starting time is:

[0114] Sliding work = |engine speed - shaft speed| x engine torque / preset points.

[0115] by Figure 4 For example, the vehicle starting segment is 8 seconds to 9 seconds. Insert 100 points in the vehicle starting segment, calculate the sliding friction work of each point respectively, sum them up and divide them by 100 to get the sliding friction work at the current moment. The current moment here refers to the starting moment of the vehicle starting segment, which can be the end moment of the vehicle starting segment. It can be flexibly set according to the actual situation.

[0116] In one embodiment, judging the vehicle starting gear and the slip work at the starting time based on the starting judgment model, when there is a starting abnormality, outputting a driving reminder signal includes:

[0117] When the slip power at the start time is not greater than the preset slip power threshold, no driving reminder signal is output;

[0118] When the sliding friction work at the start time is greater than the preset sliding friction work threshold, and the vehicle starting gear is greater than the preset starting gear threshold, a gear too high driving reminder signal is output;

[0119] When the slippage work at the start time is greater than the preset slippage work threshold, and the vehicle's starting gear is not greater than the preset starting gear threshold, an over-speed driving reminder signal is output.

[0120] Figure 5 The present invention is a schematic structural diagram of an embodiment of a vehicle abnormal start reminder system provided by the present invention.

[0121] Reference Figure 5 The present invention also provides a vehicle start abnormality reminder system, comprising:

[0122] A starting judgment module 51 is used to continuously collect vehicle status data, judge whether the vehicle meets the starting conditions based on the vehicle status data, and obtain an initial starting process cycle when the starting conditions are met;

[0123] a synchronization curve drawing module 52, for querying the standard transmission ratio data of each gear of the vehicle, calculating the one-shaft speed of the vehicle at different gears based on the transmission output shaft speed and the standard transmission ratio data of each gear, determining the synchronization coefficient at different gears based on the one-shaft speed and the engine speed at different gears, and drawing the synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence;

[0124] The vehicle starting segment recognition module 53 is used to recognize the synchronization coefficient curves of different gears by using the peak recognition principle to obtain the vehicle starting segment;

[0125] The vehicle starting gear position recognition module 54 is used to analyze the synchronization coefficient of the vehicle starting segment using a preset recognition algorithm to obtain the vehicle starting gear position and calculate the rotation speed of one shaft under the vehicle starting gear position;

[0126] The friction work calculation module 55 is used to calculate the rotation speed of one shaft and the engine speed of the vehicle at the starting gear by using a linear interpolation method to determine the friction work at the starting time;

[0127] The early warning module 56 is used to judge the vehicle starting gear and the slipping work at the starting time based on the starting judgment model, and output a driving reminder signal when there is a starting abnormality.

[0128] The beneficial effects of adopting the above embodiment are as follows: the starting judgment module 51 is used to determine the initial starting process cycle of the vehicle; the synchronization curve drawing module 52 determines the synchronization coefficient under different gears based on the gearbox output shaft speed, the standard gearbox speed ratio data and the engine speed, and draws the synchronization coefficient curves of different gears; the vehicle starting segment identification module 53 uses the peak recognition principle to identify the synchronization coefficient curve to obtain the vehicle starting segment; the vehicle starting gear position identification module 54 uses a preset recognition algorithm to obtain the vehicle starting gear position, and calculates the one-axis speed under the vehicle starting gear position; the sliding friction work calculation module 55 calculates the one-axis speed and the engine speed under the starting gear position to determine the sliding friction work at the starting time; the early warning reminder module 56 judges the vehicle starting gear position and the sliding friction work at the starting time based on the starting judgment model, and outputs a driving reminder signal when there is a starting abnormality. The present invention can identify abnormal vehicle starting behavior and remind the driver in real time to avoid clutch failure caused by improper starting by the driver.

[0129] The above embodiment provides a vehicle start abnormality reminder system which can implement the technical solution described in the above vehicle start abnormality reminder method embodiment. The specific implementation principles of the above modules or units can be based on the corresponding contents in the vehicle start abnormality reminder method embodiment, which will not be repeated here.

[0130] The above is a detailed introduction to a vehicle start abnormality reminder method and system provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for reminding a vehicle of abnormal starting, characterized in that: include: Continuously collecting vehicle status data, determining whether the vehicle meets a starting condition based on the vehicle status data, and obtaining an initial starting process cycle when the starting condition is met; querying the standard gearbox speed ratio data of each gear of the vehicle, calculating the first shaft speed of the vehicle at different gears based on the gearbox output shaft speed and the standard gearbox speed ratio data of each gear, determining the synchronization coefficient at different gears based on the first shaft speed and the engine speed at the different gears, and drawing the synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence, wherein the calculation formula of the synchronization coefficient at different gears is: synchronization coefficient=first shaft speed / engine speed; The synchronization coefficient curves of the different gears are identified by using the peak recognition principle to obtain the vehicle starting segment; Analyzing the synchronization coefficient of the vehicle starting segment by using a preset recognition algorithm to obtain the vehicle starting gear, and calculating the rotation speed of an axle at the vehicle starting gear; Calculating the rotation speed of the shaft and the engine speed at the starting gear of the vehicle by linear interpolation to determine the sliding friction work at the starting time; Judging the starting gear position of the vehicle and the slippage work at the starting time based on the starting judgment model, and outputting a driving reminder signal when there is a starting abnormality; The step of analyzing the synchronization coefficient of the vehicle starting segment by using a preset recognition algorithm to obtain the vehicle starting gear position includes: The synchronization coefficients at each moment in the vehicle starting segment are screened out to form a synchronization coefficient set, and the marking value of the synchronization coefficient is determined based on the synchronization coefficient marking rule, and the time point corresponding to the synchronization coefficient closest to 1 in the synchronization coefficient set is taken as the target time point, the time point at the moment before the target time point is taken as the previous time point, and the time point at the moment after the target time point is taken as the next time point, and the difference between the synchronization coefficient at the target time point and the time point at the previous time point is calculated to obtain a first synchronization coefficient difference value, and the difference between the synchronization coefficient at the target time point and 1 is calculated to obtain a second synchronization coefficient difference value; The gear recognition rule is used to determine the synchronization coefficient at the previous time point, the synchronization coefficient at the target time point, the synchronization coefficient at the next time point, the first synchronization coefficient difference, and the second synchronization coefficient difference to obtain a starting gear of the vehicle; The synchronization coefficient marking rules determine the marking value of the synchronization coefficient including: When the synchronization coefficient is within the synchronization coefficient threshold range, the mark value of the synchronization coefficient is 1, and when the synchronization coefficient is outside the synchronization coefficient threshold, the mark value of the synchronization coefficient is 0; The number of gears of the vehicle includes first gear, second gear, third gear, fourth gear and fifth gear, and the gear identification rules include: When the mark value of the synchronization coefficient at the target time point is 1, and the mark value of the synchronization coefficient at the previous time point or the mark value at the next time point is 1, the vehicle start mark is 1; When the mark value of the synchronization coefficient at the target time point is 1, and the first synchronization coefficient difference and the second synchronization coefficient difference are both minimum values ​​of the corresponding values ​​in the synchronization coefficients, the vehicle start mark is 2; When the mark value of the synchronization coefficient at the target time point is 1, and the first synchronization coefficient difference is the minimum value of the corresponding value in the synchronization coefficient, but the second synchronization coefficient difference is not the minimum value of the corresponding value in the synchronization coefficient, the vehicle starting gear mark is 3; When the mark value of the synchronization coefficient at the target time point is 0, the first synchronization coefficient difference and the second synchronization coefficient difference are both minimum values ​​of the corresponding values ​​of the synchronization coefficients, and the second synchronization coefficient difference is greater than or equal to 0.8, the vehicle starting gear mark is 4; The mark value of the synchronization coefficient at the target time point is 0, the first synchronization coefficient difference and the second synchronization coefficient difference are both the minimum values ​​of the corresponding values ​​of the synchronization coefficients, and the second synchronization coefficient difference is less than 0.8, then the vehicle starting gear mark is 5; The minimum value of the vehicle gear mark value is determined to be the vehicle starting gear.

2. The vehicle start abnormality reminder method according to claim 1, characterized in that: The collecting of vehicle status data, determining whether the vehicle meets the starting condition based on the vehicle status data, and obtaining the initial starting process cycle when the starting condition is met includes: Collecting vehicle status data, the vehicle status data including current vehicle speed data and throttle opening and closing data; When it is identified that the current vehicle speed data is continuously 0 within a preset period and the throttle opening and closing data is greater than 0, it is determined that the current vehicle is in a starting state, and the end time node of the preset period is used as the starting time point, and the preset starting period is the vehicle starting process period.

3. The vehicle start abnormality reminder method according to claim 2, characterized in that: The querying of the standard transmission ratio data of each gear of the vehicle, calculating the rotation speed of a shaft of the vehicle at different gears based on the transmission output shaft rotation speed and the standard transmission ratio data of each gear, determining the synchronization coefficient at different gears based on the rotation speed of the shaft at different gears and the engine speed, and drawing the synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence includes: Querying the standard gearbox speed ratio data of each gear of the vehicle on the cloud platform according to the chassis number of the vehicle; Calculate the vehicle's shaft speed at different gears based on the gearbox output shaft speed and the standard gearbox speed ratio data of each gear; Determining synchronization coefficients at different gears based on the shaft speed and the engine speed at the different gears; Draw the synchronization coefficient curves of different gears according to the time sequence; The calculation formula of the rotation speed of one shaft under different gears is: One shaft speed = gearbox output shaft speed x standard gearbox ratio of the current gear.

4. The vehicle start abnormality reminder method according to claim 1, characterized in that: The synchronization coefficient curves of different gears are identified by using the peak recognition principle to obtain the vehicle starting segment, which includes: The first peak time node of the synchronization coefficient curve of the different gears is identified, and the starting time point to the first peak time node is defined as the vehicle starting segment.

5. The vehicle start abnormality reminder method according to claim 1, characterized in that: The method of calculating the rotation speed of an axle and the engine speed at the starting gear of the vehicle by using a linear interpolation method to determine the sliding friction work at the starting time includes: The engine speed, the shaft speed and the engine torque between every two adjacent moments in the vehicle starting segment are interpolated into a preset number of points according to a linear interpolation method, and the sliding friction work at the starting moment is calculated based on the sliding friction work calculation formula; The calculation formula of the sliding friction work at the start time is: Sliding work = |engine speed - shaft speed| x engine torque / preset points.

6. The vehicle start abnormality reminder method according to claim 1, characterized in that: The judging of the vehicle starting gear and the slip work at the starting time based on the starting judgment model, and outputting a driving reminder signal when there is a starting abnormality, comprises: When the sliding friction work at the start time is not greater than the preset sliding friction work threshold, no driving reminder signal is output; When the sliding friction work at the start time is greater than the preset sliding friction work threshold, and the vehicle starting gear is greater than the preset starting gear threshold, outputting a gear too high driving reminder signal; When the slipping power at the start time is greater than the preset slipping power threshold, and the vehicle starting gear is not greater than the preset starting gear threshold, an over-speed driving reminder signal is output.

7. A vehicle start abnormality reminder system, used to execute the vehicle start abnormality reminder method according to any one of claims 1 to 6, characterized in that: include: A starting judgment module, used for continuously collecting vehicle status data, judging whether the vehicle meets the starting conditions based on the vehicle status data, and obtaining an initial starting process cycle when the starting conditions are met; a synchronization curve drawing module, used for querying the standard transmission ratio data of each gear of the vehicle, calculating the one-shaft speed of the vehicle at different gears based on the transmission output shaft speed and the standard transmission ratio data of each gear, determining the synchronization coefficient at different gears based on the one-shaft speed and the engine speed at the different gears, and drawing the synchronization coefficient curves of different gears in the initial starting process cycle according to the time sequence; A vehicle starting segment recognition module is used to recognize the synchronization coefficient curves of the different gears by using the peak recognition principle to obtain the vehicle starting segment; A vehicle starting gear position recognition module is used to analyze the synchronization coefficient of the vehicle starting segment using a preset recognition algorithm to obtain the vehicle starting gear position and calculate the rotation speed of an axle under the vehicle starting gear position; A friction work calculation module, used to calculate the rotation speed of a shaft and the engine speed of the vehicle at the starting gear by using a linear interpolation method to determine the friction work at the starting moment; The early warning and reminder module is used to judge the starting gear of the vehicle and the slip work at the starting time based on the starting judgment model, and output a driving reminder signal when there is a starting abnormality.

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