A control method for pulsation suppression of a range extender

Abstract

The invention is applicable to the technical field of power cars, and provides a range extender ripple rejection control method which comprises the following steps of testing power generation efficiency of a range extender under different working conditions, and acquiring working conditions with high power generation efficiency; testing the duration for the vibration noise of the range extender reaching to the setting noise and the vibration noise frequency when reaching to the setting noise under the various working conditions with high power generation efficiency; selecting power generationpower combination based on the duration for the vibration noise of the range extender reaching to the setting noise under the working conditions with high power generation efficiency, wherein an average power generation power value of the power generation power combination is equal to a required average power generation power value; sequentially and adjacently arraying the working conditions withclose rotate speed and great vibration noise frequency difference in the power generation power combination , controlling an engine to run based on the sequentially arrayed working conditions, adjacently arraying the working conditions with great vibration noise frequency difference, delaying the duration for the range extender reaching to noise resonance for the next time, and shortening the highvibration noise duration of the range extender during the driving process as much as possible.

Description

technical field [0001] The invention belongs to the field of power battery vehicles and provides a range extender pulse suppression control method. Background technique [0002] With the promotion of new energy vehicles, because the energy density of energy storage batteries is still in the bottleneck period, the mileage of pure electric vehicles is limited, while fuel cells cannot be popularized for civilian use due to their high cost and no reliable low-carbon hydrogen source. Plug-in hybrid electric vehicles and range-extended hybrid electric vehicles have become the focus of industry development. The extended-range electric vehicle (Extended-Range Electric Vehicle, EREV) is in line with the priority direction of pure electric vehicles in my country because its driving principle is similar to that of pure electric vehicles, and it also has an extended-range generator, which does not require parking charging, and theoretically has no battery life The limit of mileage has b...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the research and development of the range extender mainly focuses on the system integration and the development of key components, and because the efficient range extender technology often uses a small-displacement single-cylinder, two-cylinder or three-cylinder four-stroke engine, the engine's The fewer the number of cylinders, the more difficult it is to suppress the vibration of the engine. It is difficult to achieve the ideal level only by optimizing the crankshaft and flywheel inertia. The optimization of the noise and vibration of the range extender needs to be improved

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