An air suspension lateral interconnection control system and method

Abstract

The invention discloses a horizontally interconnected control system and method for an air suspension mounted on a vehicle. The control system consists of a temperature acquisition module, an air pressure acquisition module, a vehicle height acquisition module, and sequentially connected controllers, PWM drive modules, and interconnected solenoid valves. Composition, the controller includes the air spring effective area and volume calculation module, the required roll force calculation module, the damper and the stabilizer bar force calculation module, the gas mass flow rate required to be exchanged and the optimal interconnection pipeline inner diameter calculation module These five modules, by reading the height of each suspension of the vehicle, the air pressure and temperature of each air spring, and according to the relationship between the physical quantities, inversely deduce that in the current vehicle state, if the side of the sprung mass of the vehicle relative to the unsprung mass is to be When the inclination angle returns to zero, the mass flow rate of gas exchanged by interconnected pipelines is required, and the solenoid valve is driven by PWM to operate. The information required by the system can be directly obtained, the calculation results are reliable, and the control is precise.

Description

technical field [0001] The invention relates to an air suspension installed on a vehicle, in particular to a model-based laterally interconnected air suspension control system for ensuring stable body attitude. Background technique [0002] The horizontally interconnected air suspension can change the roll angle stiffness of the suspension without affecting the vertical characteristics of the suspension, and through reasonable control, the ride comfort of the vehicle can be improved. [0003] The Chinese invention patent application number is 201611118739.8, and the name is "a horizontally interconnected air suspension imitation ceiling interconnection state control system and control method. A solenoid valve is installed on the connecting pipeline of the horizontally interconnected air spring. The opening and closing of the solenoid valve is controlled by the control system. It is determined and driven by the drive circuit, judged by obtaining the roll angle of the sprung m...

AI Technical Summary

Problems solved by technology

However, the problem with this control system is that the required roll angle of the unsprung mass cannot be directly obtained through the sensor because there is no suitable sensor installation position in the suspension.

The existing problems are: the range of working conditions is wide, the opening and closing of the interconnection is rough, and it cannot be dynamically adjusted according to the instantaneous state of the vehicle, and the effect is poor.

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