Method and system for estimating vehicle load
A vehicle load and vehicle technology, applied in the field of vehicles, can solve the problem of low accuracy of vehicle load estimation, and achieve the effect of avoiding low estimation accuracy and ensuring accuracy
Active Publication Date: 2017-11-10
WEICHAI POWER CO LTD
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Problems solved by technology
[0008] Based on the defects of the prior art, the present invention provides a method and system for estimating vehicle load, which solves the technical problem of low accuracy of estimating vehicle load in the prior art without increasing vehicle cost and failure rate
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[0050] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0051] figure 1 A schematic flowchart of a vehicle load estimation method provided by an embodiment of the present invention is shown. like figure 1 As shown, the vehicle load estimation method of this embodiment includes steps S11 to S14.
[0052] S11. During the running of the vehicle at a constant speed or acceleration, periodically detect the vehicle traction torque, vehicle speed and vehicle acceleration with a preset time period.
[0053] When the vehicle is running at a constant speed or accelerating, that is, when the opening of the accelerator pedal of the vehicle is >0, the opening of the brake pedal is equal to 0, and the acceleration a≥0 of the vehicle, the ...
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The invention provides a vehicle loading predicting method and system. The predicting method comprises the following steps of when a vehicle travels at an uniform speed or in an acceleration state, periodically detecting the vehicle traction torque, the vehicle speed and the vehicle acceleration; according to the detected parameters, calculating vehicle loading values at all times; arraying the vehicle loading values at all times from small to large, extracting vehicle loading values at different first N times, or extracting a first vehicle loading valve at the first time and other N-1 vehicle loading values which are smaller than the first vehicle loading valve, and constituting a vehicle loading value database, wherein N is equal to or greater than 3; and determining that the first average value of other N-2 vehicle loading values in the vehicle loading value database without including the maxima value and the minimum value is the first vehicle loading estimating valve. According to the vehicle loading predicting method and system disclosed by the invention, accurate estimation of the vehicle loading under the situation of being free from a slope sensor can be realized, the cost and the failure rate of a vehicle are not increased, and the accuracy of the vehicle loading estimating value can also be guaranteed.
Description
technical field [0001] The present invention relates to the technical field of vehicles, in particular to a vehicle load estimation method and system. Background technique [0002] Vehicle load refers to the quality of goods and passengers loaded by the vehicle. Accurately estimating the vehicle load can be used to modify the shift schedule and other control strategies, thereby improving the adaptability of automatic transmission vehicles to different working conditions, and can also detect whether the cargo in the vehicle is lost during driving. [0003] There are two methods for estimating vehicle load in the prior art: [0004] Method 1: Install a slope sensor on the vehicle, use the slope sensor to obtain the slope angle in real time, and use the slope angle to calculate the estimated value of the vehicle load in real time. [0005] Method 2: Alternately fix the vehicle load and slope, and estimate each other. That is to fix the vehicle load, use the fixed vehicle loa...
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IPC IPC(8): B60W40/13
CPCB60W40/13B60W2520/10B60W2520/105
Inventor 刘兴义陈琳董英荣
Owner WEICHAI POWER CO LTD