Suspension system, suspension structure and electric vehicle and damping control method thereof

Abstract

The invention discloses a suspension system of an electric vehicle. The system comprises a suspension structure, an acceleration detection device, a calculation device and a control device; the suspension structure comprises an outer support frame and an inner support frame, an excitation coil and a magnetic movable member; the outer support frame is connected to a body of the electric vehicle; the inner support frame is connected with a power assembly; an elastic member is installed between the outer support frame and the inner support frame; the magnetic movable member is positioned inside the excitation coil and is connected to the inner support frame; the acceleration detection device detects acceleration signals which are vertical to the ground of the power assembly; the calculation device calculates the acceleration amplitude based on the acceleration signals and calculates the difference between the acceleration amplitude and a amplitude threshold; the control device controls the energizing direction and the energizing current of the excitation coil according to the direction of the acceleration signals, the difference between the acceleration amplitude and the amplitude threshold. The electric vehicle suspension system can effectively reduce the vibration on the powertrain caused by the excitation of road surface. The invention also discloses a suspension structure, anelectric vehicle and a vibration damping control method thereof.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and in particular relates to an electric vehicle suspension system, a suspension structure, an electric vehicle including the suspension system and a shock absorption control method thereof. Background technique [0002] The suspension structure can reduce the vibration of the powertrain of the car and improve the comfort of the car. For example, an active suspension and its control method are disclosed in the related art, the method includes: ECU (Electronic Control Unit, electronic control unit) based on the signal output from the TDC sensor and the crank pulse sensor to estimate the first cycle of engine vibration The vibration state of the engine, and calculate the target current value waveform of the cycle length T1. Then, from this target current value waveform, at a constant sampling period, for example, a data set of a target current value with respect to the driving unit of the active ...

AI Technical Summary

Problems solved by technology

This control method can solve the vibration caused by the ignition shock of the engine, but for the first-order vibration of the electric vehicle powertrain due to the excitation of the road surface, the vibration reduction effect is not good

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