Method and system for estimating vehicle weight
A vehicle weight and vehicle technology, applied in the field of vehicles, can solve the problems of unguaranteed accuracy, large limitations and high cost, and achieve the effects of low cost of function realization, few restrictions, and stable vehicle weight measurement.
Active Publication Date: 2021-04-23
ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD +3
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Problems solved by technology
[0003] In the existing mass estimation schemes, the vehicle speed is used to estimate the acceleration and then the weight is estimated, and the accuracy cannot be guaranteed; some use a special weighing system for weighing, and the weight is calculated according to the suspension stiffness through the deformation of the vehicle suspension system, which is costly. Big limitations
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Embodiment Construction
[0041] figure 1 is a flowchart of a vehicle weight estimation method according to an embodiment of the present invention. Such as figure 1 As shown, in one embodiment of the present invention, the vehicle weight estimation method includes the following steps:
[0042] Step S10: collect the longitudinal acceleration, lateral acceleration and vertical acceleration of the vehicle through the six-axis sensor 10;
[0043] Step S20: Collecting the driving torque and vehicle speed when the vehicle is in a constant speed state and accelerated state respectively;
[0044] Step S30: Calculate the first driving force according to the driving torque and vehicle speed when the vehicle is in a state of constant speed;
[0045] Step S40: Calculating the second driving force according to the driving torque and vehicle speed when the vehicle is running on a road with a constant slope and in an accelerating state, and meanwhile calculating the wind resistance increment according to the vehic...
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The invention provides a vehicle weight estimation method and system, belonging to the field of vehicles. The method includes: collecting the longitudinal acceleration, lateral acceleration and vertical acceleration of the vehicle through a six-axis sensor; collecting the driving torque and vehicle speed when the vehicle is in a constant speed state and acceleration state respectively; The first driving force; calculate the second driving force according to the driving torque and vehicle speed when the vehicle is driving on a road with a fixed slope and in the acceleration state, and calculate the wind resistance increment at the same time; calculate according to the first driving force, the second driving force and the wind resistance increment The resultant force of external force when the vehicle is accelerating; calculate the longitudinal component force of the vehicle according to the resultant force of longitudinal acceleration, lateral acceleration, vertical acceleration and external force when the vehicle is accelerating; estimate the mass of the vehicle according to the longitudinal component force and longitudinal acceleration. The method for estimating the vehicle weight of the present invention has few restricted conditions and can ensure the accuracy of the estimated vehicle weight.
Description
technical field [0001] The invention relates to the field of vehicles, in particular to a vehicle weight estimation method and system. Background technique [0002] Cargo-carrying vehicles have a wide range of weight changes depending on the quality of the cargo. The weight is a key parameter affecting vehicle performance and affects vehicle acceleration, braking, and energy management. If the real-time vehicle weight is accurately estimated, The estimated quality can then be used to improve vehicle performance. [0003] In the existing mass estimation schemes, the vehicle speed is used to estimate the acceleration and then the weight is estimated, and the accuracy cannot be guaranteed; some use a special weighing system for weighing, and the weight is calculated according to the suspension stiffness through the deformation of the vehicle suspension system, which is costly. The limitations are large. Contents of the invention [0004] An object of the first aspect of the...
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IPC IPC(8): B60W40/13
CPCB60W40/13B60W2520/00B60W2520/105B60W2520/125
Inventor 刘庆勃孙昊刘德春林元则韦健林
Owner ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD