Matching method of cooling module of passenger vehicle

Abstract

The invention relates to a matching method of a cooling module of a passenger vehicle. The method comprises: fan feature curves of a reference fan under different voltages are obtained; when a vehicle is driven at a certain speed in a testing cabin, total-impedance curves of the vehicle at different vehicle speeds are obtained by fitting; a rotating speed and a torque value that are needed by an engine of a checking vehicle type on a typical condition for checking are obtained by simulation; corresponding engine cooling demanding quantities of the engine at different rotating speeds under different loads are obtained by bench testing, so that a cooling demand quantity of the checking vehicle on the typical condition for checking is obtained; a fan feature curve of a matched fan under a rated voltage is obtained by processing; and according to the total-impedance curves and the fan feature curve of the matched fan under the rated voltage, a cooling capacity that can be provided by a matched cooling module is calculated, and then the cooling capacity provided by the matched cooling module is compared with the cooling demand quantity of the checking vehicle on the typical condition for checking to determine whether the matched cooling module matches the cooling demand of the checking vehicle type.

Description

technical field [0001] The invention relates to a scheme design of a cooling module of a passenger car, in particular to a matching method of the cooling module of a passenger car. Background technique [0002] With the improvement of people's living standards, cars have already entered tens of millions of households as a means of transportation. With the advancement of technology, the speed of car replacement is getting faster and faster, so the frequency of new models launched by car manufacturers is also accelerating. Moreover, car manufacturers will launch modified cars based on existing platforms every once in a while (for example, one year) to better meet the needs of consumers. When an automobile manufacturer develops a new model or develops a modified car on an existing platform, it needs to modify and optimize the design of the cooling module of the car so that the cooling module can match the cooling requirements of the new model. [0003] At present, the automoti...

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Problems solved by technology

[0003] At present, the automotive industry has the following methods for matching cooling modules: 1. Using empirical data to estimate the main parameters of the cooling module; 2. Referring to similar models to estimate the main parameters of the cooling module; 3. Optimizing the cooling modules of existing models , it is necessary to determine the optimal solution by carrying a large number of samples on the whole vehicle test, and the cycle and cost are high

[0004] It can be seen that the matching design of the cooling module in the existing methods is mainly based on empirical estimation, which is not specific to each vehicle model, and cannot be effectively checked before the intervention of CFD (Computational Fluid Dynamics, computational fluid dynamics) flow field simulation. Cooling module performance at different vehicle speeds

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