Range increasing device of electric vehicle and regulating and controlling method thereof

Abstract

The invention discloses a range increasing device of an electric vehicle and a regulating and controlling method thereof. The range increasing device of the electric vehicle comprises an engine and agenerator, and the engine and the generator are connected through an stepless speed changer; an engine controller, a generator controller and a gearbox controller are arranged on the engine, the generator and the stepless speed changer; the engine controller, the generator controller and the gearbox controller are connected with a range extender in a control way; the actual condition of the vehicle is monitored in real time by a range extender controller; the optimal matching speed ratio can be achieved by combining the NVH test data and the system efficiency; the range increasing device has the advantages that the structure is simple, the manufacturing cost is low, and the installation is convenient; the range increasing device is connected with the engine and the generator of the electric vehicle by the stepless speed changer, so that the power transmission can be continuously and reliably carried out, the dynamic property and the stability of the vehicle are improved, the optimal transmission matching of the engine and the generator is achieved, the engine and the generator are maintained at ideal and high-efficiency working points, thereby effectively improving the fuel economyand solving the trouble of NVH.

Description

technical field [0001] The invention relates to a range-extending device and a control method of an electric vehicle, belonging to the technical field of new energy vehicles. Background technique [0002] With the development of society, people's living conditions are gradually improving. Therefore, in recent years, my country's automobile industry has ushered in rapid development. However, while the popularization of automobiles promotes the development of human social economy and modern civilization, it also brings severe energy and environmental problems. Energy saving and environmental protection have become one of the themes of automobile technology development. If so, new energy vehicles (such as pure electric vehicles, hybrid electric vehicles-extended range vehicles and fuel cell vehicles) and their related component technologies have been greatly developed. Among them, the extended-range vehicle has the advantages of both pure electric and hybrid vehicles: pure ele...

AI Technical Summary

Problems solved by technology

Among them, the first method is limited by the influence of NVH and cannot fully apply and utilize the high-speed and high-efficiency zone of the generator; the second method restricts the application of the engine economic zone to a certain extent, and brings difficulties to the selection and matching of the engine. Therefore, both of the above two methods have the economic zone and high-efficiency zone that cannot be fully applied and exerted to the engine and generator, and the fuel economy is not ideal.

Images