Altitude Estimation Method and Device for Electric Vehicle and Its Environment

Abstract

The invention discloses an electric vehicle, as well as a method and device for estimating the sea level elevation of environment around the electric vehicle. The electric vehicle comprises a braking booster system, wherein the braking booster system comprises a vacuum pump for extracting air in the braking booster system to provide vacuum degree in the braking booster system. The method comprises the following steps of judging whether the vacuum pump is under working state or not, judging whether a braking pedal signal of the electric vehicle is received or not, and judging whether the vacuum pump breaks down or not; and if the vacuum pump is under the working state, the braking pedal signal of the electric vehicle is not received and the vacuum pump does not break down, according to the relationship between the vacuum degree in the braking booster system and time, estimating environmental pressure of the environment in which the electric vehicle is positioned, and according to the environmental pressure, calculating the sea level elevation of the environment in which the electric vehicle is positioned. According to the method disclosed by the invention, the calculation of the sea level elevation is realized when a manometer does not exist or breaks down, and the driving feeling of a driver and the riding feeling of a passenger are guaranteed.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for estimating the altitude of the environment where an electric vehicle is located, a device for estimating the altitude of the environment where the electric vehicle is located, and an electric vehicle with the device. Background technique [0002] In the face of increasingly serious energy and environmental problems, the increasing demand for oil resources and the environmental pollution caused by traditional fuel vehicles have increasingly attracted people's attention. At the same time, energy-saving and new energy vehicles are becoming research hotspots in various countries. As one of my country's strategic emerging industries, energy-saving and new energy vehicles have received great attention from the government and the industry. The development of new energy vehicles, especially electric vehicles with zero pollution and zero emissions, is not only of great imp...

AI Technical Summary

Problems solved by technology

Although electric vehicles have the above advantages, due to the lack of breakthroughs in battery technology at the present stage, their single driving range after full charge is only about 30% of that of traditional fuel vehicles, which affects the acceptance of ordinary people. The convenience of charging cannot be compared with the refueling of fuel vehicles, which also limits the market popularity of electric vehicles

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