Range extender working condition control method and device

Abstract

The invention discloses a range extender working condition control method and device. The range extender working condition control method includes the steps that a selected triggering operation aimingat selection options of the working condition of a range extender is monitored, wherein the selection options of the working condition of the range extender includes at least one of an active workingcondition option, an economic working condition option, a power working condition option and an automatic working condition option; a currently selected working condition of the range extender is determined according to the selected triggering operation, and the selected working condition of the range extender is started for use; whether the current vehicle state meets the start condition of therange extender in the working condition of the range extender or not is judged; and if so, the start request of the range extender is sent for the range extender to perform power output based on the start request. According to the technical scheme, by refining the actual driving conditions of a user and combining the working characteristics of the range extender, the control over the working stateof the range extender is realized so that the range extender works in the area with the best energy conversion rate, the energy conversion performance and stability of the range extender are improved, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and device for controlling working conditions of a range extender. Background technique [0002] An extended-range electric vehicle is an electric vehicle equipped with ground charging and on-board power supply functions. Extended-range electric vehicles are more and more popular due to their flexible power supply, simple structure, energy saving and emission reduction. Since the range extender is one of the important components in the range-extended electric vehicle, the control strategy for the range-extender has an important impact on the performance of the range-extender and even the performance of the entire range-extended electric vehicle. [0003] At present, the control methods for the range extender are limited to the fixed operating point control method and the vehicle speed following control method. Among them, the fixed operating point control method is...

AI Technical Summary

Problems solved by technology

[0004] However, in the fixed operating point control method, because the operating point is relatively discrete, it cannot meet most of the power requirements of the vehicle. In addition, the user's degree of freedom is low in this control method, and it is impossible to control the opening and closing of the range extender. The impact and noise of the range extender body are likely to be generated during the switching process of the status point, and the NVH (Noise, Vibration, Harshness, noise, vibration, and harshness) performance is poor, which greatly reduces the user experience; and the speed following control method is due to It needs to work under the full load of the vehicle, so that the range extender cannot maintain an excellent energy conversion rate at each operating point of operation, and the range extender in this control method needs to work frequently, thereby increasing the energy consumption of the vehicle and improving User's car cost

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