Two-stage vibration reduction active suspension without function loss after failure and working method of two-stage vibration reduction active suspension

Abstract

The invention discloses a two-stage vibration reduction active suspension without function loss after a fault and a working method. The two-stage vibration reduction active suspension comprises a traditional vibration reduction structure composed of a first oil cylinder, a first piston rod, a first adjustable throttling valve, a second energy accumulator, a first electromagnetic valve and a first energy accumulator. The two-stage vibration reduction active suspension further comprises an active or anti-resonance vibration reduction structure which is composed of a second oil cylinder, a second piston rod, a permanent magnet synchronous motor, a pump or a motor, a second adjustable throttling valve, an inerter spiral pipe, a second electromagnetic valve and a third energy accumulator. When the active or anti-resonance vibration reduction structure breaks down, the first electromagnetic valve is normally opened, the first adjustable throttling valve is in a medium circulation state, the second electromagnetic valve is normally closed, and the second adjustable throttling valve is in a minimum circulation state. the third mass of the suspension, the unsprung mass and the sprung mass form a three-mass vibration structure, the comprehensive performance of the active and passive working states of the suspension is improved, and after the active or anti-resonance vibration reduction structure breaks down, the active vibration reduction function is converted into the anti-resonance vibration reduction function with large inerter and large damping.

Description

technical field [0001] The invention belongs to the field of automobile suspension, and in particular relates to a two-stage vibration-damping active suspension structure and a working method thereof, which can effectively and actively damp the automobile when there is no failure, and ensure that the suspension vibration-damping function is not lost when a failure occurs. Background technique [0002] Suspension is an important structural component of a car, which has an important impact on the ride comfort and handling stability of the car. Active suspensions use active force actuators to achieve much better suspension performance than conventional one-stage passive suspensions. In order to overcome the shortcomings of the small output force of the linear motor actuator, the rotary motor actuator can output a large control force, but the actuator has a large equivalent inertial mass, which leads to the use of the traditional primary vibration damping structure. The expecte...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the overall performance of the existing two-stage damping active suspension is not significantly improved and the suspension damping function is almost lost after a failure, and proposes a two-stage damping active suspension that does not lose its function after a failure. Suspension, while giving the working method of the suspension

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