Method for calculating gross vehicle weight and fuel-saving control method

Abstract

The invention provides a method for calculating gross vehicle weight. The method includes the steps that a gravity acceleration sensor, a controller and a vehicle original engine ECU which are installed on the vehicle are utilized, the controller figures out the current gross vehicle weight based on a vehicle driving kinetic equation by obtaining engine information, vehicle information and dip angle information and acceleration information and then outputs the current gross vehicle weight information outwards, wherein the dip angle information and the acceleration information are output by the gravity acceleration sensor. The vehicle information comprises the current gearbox gear speed ratio information, the final ratio information, the tier rolling radius information, the rolling damping coefficient information, the drag coefficient information, the conversion coefficient information of automobile rotary weight, transmission system mechanical efficiency information, clutch switching state information and the like. The invention further provides a fuel-saving control method. The method includes the steps that the current gross vehicle weight is obtained through calculation, the ratio of the current gross vehicle weight to vehicle full-load gross weight is converted into a loading state, and the ECU selects corresponding engine power output gears according to the received loading state information. The method for calculating the gross vehicle weight and the fuel-saving control method have the advantages that the number of used sensors is small, and calculation results are accurate.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for calculating the total mass of a load-carrying vehicle. Background technique [0002] The total mass of the vehicle is an indispensable and important input parameter in terms of fuel economy and safety control. Accurately obtaining the total mass of the vehicle is conducive to the better application of related control systems, and it is also conducive to the driver's control of his driving behavior and driving process. risk in. It should be noted that the total mass of the vehicle is equal to the sum of the unladen mass of the vehicle and the loaded mass of the vehicle, and the unladen mass of the vehicle is a known fixed value, so the total mass of the vehicle and the loaded mass of the vehicle can be converted into each other, that is, the total mass of the vehicle and The technique for vehicle load mass is in effect the same. [0003] The ratio of the current...

AI Technical Summary

Problems solved by technology

[0005] The method of using the compression between the frame and the axle to calculate the load quality needs to arrange two displacement detection devices on the front and rear axles respectively. The cost of the device is high and the installation is more complicated. When the ground is on the ground, there will be a component of gravity in the direction of the slope or in the lateral direction, resulting in a large error in the measurement results; in addition, the leaf spring will be deformed after the vehicle is used for a long time, which will also lead to an increase in the error of the vehicle

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