A control method for thermal management system of hybrid electric vehicle based on fixed road spectrum

Abstract

The invention discloses a control method of a hybrid vehicle heat management system based on a fixed road spectrum. The method comprises following steps: parameter information of the vehicle running fixed road spectrum is collected, before the vehicle enters in the climbing station, the information is brought into input parameters of the control method of a controller, a neural network is trained, the control strategy of the fan rotating speed is corrected, through the heat management system, the cooling fan rotating speed is improved, the rotating speed time is changed in advance to the output variable, through in-advance changing of the fan rotating speed, a cooler is subject to pre-cooling, and under the condition that the vehicle is in the climbing station, the cooling requirement is met. According to different stations, flexible conversion of the control strategy is carried out, before the climbing station, running of a cooling fan is carried out in advance, through in-advance changing of the rotating speed of the fan, the cooler is subject to pre-cooling, and under the climbing condition, on the basis of meeting the cooling requirement, the power consumption of the fan is reduced.

Description

technical field [0001] The invention relates to a control method of a thermal management system of a hybrid electric vehicle based on a fixed road spectrum. Background technique [0002] As an indispensable member of the transportation system, a hybrid vehicle with a fixed driving route has a relatively fixed driving route and a relatively stable driving cycle. The entire driving route is mainly composed of starting, driving at a constant speed, accelerating and climbing. Slope driving, parking and other working conditions. During the climbing process, factors such as the number of passengers and the slope will cause the vehicle to be in a high-load state, and the heat dissipation of the radiator will be greatly increased. Taking the traditional engine powertrain as an example, the engine is normal. The normal temperature of the cooling water during work should be kept between 90°C and 105°C. At this time, the engine can generate the maximum power, the fuel consumption is th...

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Problems solved by technology

[0004] However, when the speed of the cooling fan increases, the power consumption of the fan will also increase significantly in proportion to the cube of the speed, resulting in greater power consumption; for the phenomenon of increased power consumption of the fan under heavy load conditions such as climbing , how to establish an effective fan speed control strategy to keep the inlet temperature of the water radiator and the outlet temperature of the intercooler within the normal operating range, and reduce the power consumption of the cooling fan as much as possible, for the thermal management system of hybrid vehicles The stable work and the realization of energy saving and emission reduction have great practical significance and application value

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