A method and system for estimating the mass of a vehicle without increasing the calibration amount

Abstract

The invention discloses a method for estimating the mass of a vehicle without increasing the calibration amount. The steps are as follows: 1. Obtain the real-time speed and engine speed information of the vehicle to obtain the numerical value; Step 2. Calculate the vehicle acceleration in real time; Step 3. Calculate and store the vehicle in real time Driving force and vehicle resistance; step 4, calculate and record multiple vehicle resistances according to the aforementioned formula; step 5, calculate vehicle mass during vehicle acceleration or deceleration. The invention also discloses a vehicle that avoids increasing the calibration amount Quality estimation system, including: value acquisition module: obtain the real-time speed and engine speed information of the vehicle, so as to obtain the value; vehicle acceleration module; vehicle driving force and resistance calculation module; vehicle resistance recording module; vehicle mass calculation module: vehicle acceleration or deceleration In the process, the calculation of the mass of the whole vehicle has the characteristics of quickness, convenience and wide applicability, and can be widely used in the field of vehicle control.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a method and system for estimating the mass of a complete vehicle that avoids increasing the calibration amount. Background technique [0002] At present, there are many methods for estimating the vehicle mass, for example: 1. Vehicle mass estimation method, invention patent, application number: 201210422369.X, establishes a vehicle motion balance model among vehicle mass, road surface gradient and vehicle longitudinal acceleration, and calculates The theoretical value of the longitudinal acceleration of the vehicle is obtained, and compared with the real value of the measured longitudinal acceleration of the vehicle, so as to determine the estimated value of the vehicle mass. But this requires the addition of an acceleration sensor, which will increase a lot of cost for mass-produced models; [0003] Another example, 2. A vehicle load acquisition method without additional sens...

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Problems solved by technology

[0003] Another example, 2. A vehicle load acquisition method without additional sensors, invention patent, application number: CN107901916 A, which uses three CAN (Controller Area Network, controller area network) generated in real time to generate engine torque, gearbox speed ratio, and vehicle speed. ) parameters are sent to the central server, combined with the vehicle's own tire radius, rear axle speed ratio and other information, that is, the vehicle's load value can be calculated through the inverse model of the vehicle's driving equation; Estimation work, the estimation work is done by collecting vehicle data and completing the calculation on the server. At the same time, it is necessary to adopt different drag coefficients and vehicle parameters according to different models. The problem brought about is that this calculation method cannot be transplanted to the vehicle controller, and many parameters The choice makes it difficult to implement in OEMs

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