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Automatic transmission shift control method, system, computer equipment and storage medium
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A technology of automatic transmission and control method, which is applied in the direction of mechanical equipment, transmission device control, and components with teeth, etc., can solve problems such as the decrease in the accuracy of slope and mass estimation, and achieve avoidance of cyclic shifting, sufficient time, and high recognition accuracy Effect
Active Publication Date: 2022-05-17
BEIJING INFORMATION SCI & TECH UNIV
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Another slope estimation method is also based on the vehicle dynamics equation to solve the slope, first obtain the vehicle traction force, acceleration and vehicle weight, and then solve the slope, there are the following problems: ignoring the influence of air resistance and ground friction resistance on the vehicle, it will lead to slope and The estimation accuracy of mass is reduced, and this technique is suitable for vehicle objects whose mass is known and constant
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Embodiment 1
[0046] In this embodiment, a shift control method for an automatic transmission is provided, such as figure 1 As shown, it includes the following steps:
[0047] 1) Obtain the vehicle weight G(n) expression containing the generalized slope of the parameter to be sought at the nth sampling;
[0048] Among them, generalized slope=(sinα+f×cosα)≈road slope.
[0049] 2) Delay the sampling time interval, and obtain the expression of the vehicle weight G(n+1) containing the slope of the parameter to be sought at the n+1th sampling;
[0050] 3) Road slope identification: Obtain slope estimation based on vehicle weight expressions at two adjacent moments;
[0051] Assuming that the weight of the vehicle is constant when the vehicle is in the driving state, and the instantaneous slope does not change, the expressions of the vehicle weight at two adjacent moments should be equal, and the slope estimate is obtained according to G(n)=G(n+1).
[0052] Since the weight and slope of the ve...
Embodiment 2
[0081] In this embodiment, an automatic transmission shift control system is provided, which includes a first processing module, a second processing module, a slope estimation module, an accumulation module, a mass solution module, a maximum limit gear determination module and an execution module;
[0082] The first processing module obtains the vehicle weight G(n) expression containing the generalized slope of the parameter to be sought when sampling for the nth time;
[0083] The second processing module obtains the expression of the vehicle weight G(n+1) containing the slope of the parameter to be requested when the n+1th sampling is obtained;
[0084] The slope estimation module obtains slope estimation according to vehicle weight expressions at two adjacent moments;
[0085] The accumulating module accumulates and averages the estimated slope obtained by multiple sampling within a preset time;
[0086] The mass solution module substitutes the estimated slope average valu...
Embodiment 3
[0091] In this embodiment, a computer-readable storage medium for storing one or more programs is provided, and the one or more programs include instructions. When the instructions are executed by a computing device, the computing device executes any one of the control methods in Embodiment 1. method.
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Abstract
The present invention relates to an automatic transmission gear shift control method, system, computer equipment and storage medium, which includes: obtaining the vehicle weight expression containing the generalized slope of the parameter to be obtained when sampling the nth time; The vehicle weight expression containing the slope of the parameter to be obtained; the slope estimate is obtained according to the vehicle weight expression at two adjacent moments; the estimated slope obtained by multiple sampling within the preset time is accumulated and averaged; the estimated slope average value is substituted into The vehicle dynamics equation is used to solve the vehicle mass; the maximum limit gear is determined according to the average value of the estimated slope and the vehicle mass; it is judged whether the current gear is greater than the maximum limit gear, if it is greater, the maximum limit gear is enforced, otherwise, according to The original gear shift strategy shifts gears normally. The present invention obtains a maximum limit gear through the identification of the slope and the vehicle weight, and the vehicle is prohibited from exceeding the recommended maximum gear during a normal upshift, thereby avoiding the occurrence of cyclic gear shifting.
Description
technical field [0001] The invention relates to the field of shift control of an automobile transmission, in particular to a shift control method, system, computer equipment and storage medium of an automatic transmission. Background technique [0002] The car will shift gears cyclically when going uphill. The reason is that the lack of power in high gears causes the vehicle to decelerate and downshift. The shifting cycle affects the driving safety and stability of the vehicle, and aggravates the wear of the mechanical parts of the transmission system. [0003] At present, in the slope dynamic recognition algorithm in AMT, the slope quality estimation method based on the vehicle driving dynamics equation requires complete power interruption and requires accurate acquisition of power interruption time. The shorter the power interruption time, the lower the slope estimation accuracy. Another slope estimation method is also based on the vehicle dynamics equation to solve the s...
Claims
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