Plateau control method for vacuum system of new energy electric vehicle

Abstract

The invention relates to the field of electric vehicle vacuum system control, in particular to a plateau control method for a vacuum system of a new energy electric vehicle. According to the plateau control method for the vacuum system of the new energy electric vehicle, in the steps S1 and S2, the vacuum system is controlled according to whether the value of the pressure difference P between a vacuum tank and the outside is within the range of B < P < A; and when the altitude is relatively high, S1 and S2 cannot meet the control requirements, the steps S3 and S4 are carried out. The value of P is compared with the values of A and B, whether the vacuum degree of the vacuum system can meet the normal requirement is determined, the vacuum pump is continuously stopped three times according to the setting that the whole vehicle is in the plateau state, and the corresponding steps S3 and S4 are executed, so that the vacuum system can exert the pumping performance of the vacuum pump to the maximum extent in the plateau (the altitude is higher than 1000 m) area, the vacuum degree is improved, and finally the effect of improving the touch feeling of the brake pedal is achieved.

Description

technical field [0001] The invention relates to the field of vacuum system control of an electric vehicle, in particular to a plateau control method for a vacuum system of a new energy electric vehicle. Background technique [0002] With the vigorous development of new energy vehicles, there are certain differences between the braking system and traditional vehicles. The vacuum energy of traditional vehicles mainly comes from the engine. In plateau areas, because of the thin air and low atmospheric pressure, the vacuum system is greatly affected. Traditional Fuel vehicles generally increase the engine speed and control the throttle opening to obtain the required vacuum as much as possible, while the vacuum energy of new energy vehicles mainly comes from the electronic vacuum pump, and the speed of the vacuum pump cannot be adjusted, so the control strategy of the vacuum system is very important. System performance plays a key role. The traditional control strategy cannot re...

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Problems solved by technology

[0003] Based on this, it is necessary to address the existing technical problems and provide a plateau control method for the vacuum system of new energy electric vehicles, which solves the problem of the vacuum degree that the vacuum system in the plateau area cannot meet the demand through the control strategy that changes according to the altitude

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