An integrated anti-rollover system and its control method

Abstract

The invention provides an integrated anti-rollover system and its control method. The hydraulic oil tank is connected to the left and right sides of the hydraulic cylinder through two oil circuits, and the two oil circuits of the main oil circuit 1 are respectively connected to the left front wheel brake and the right vibration damping circuit. The first one-way solenoid valve and the fourth solenoid valve are respectively arranged on the two oil circuits, the left front wheel brake is connected with the hydraulic oil tank through the first electromagnetic valve, and the two oil circuits of the main oil circuit two are connected with the right front wheel respectively. The brake is connected to the left shock absorber, the second one-way solenoid valve and the second solenoid valve are respectively set on the two oil circuits, and the right front wheel brake is connected to the hydraulic oil tank through the third solenoid valve; the ECU opens the channel according to the steering request type The corresponding channel of the solenoid valve, the solenoid valve that can increase the pressure of the brake oil circuit, and the ECU controls the closing time point of the solenoid valve that generates differential yaw moment and anti-rollover moment to generate differential yaw moment and anti-rollover moment. The invention reduces the hysteresis of the hydraulic system, couples the yaw moment and the anti-rollover moment, and has good anti-rollover effect.

Description

technical field [0001] The invention relates to the field of automobile safety, in particular to an integrated anti-rollover system and a control method thereof. Background technique [0002] As the most used means of transportation, automobiles provide great convenience for people's daily travel on the one hand, and on the other hand, they also pose a huge threat of traffic accidents to personal safety. Among them, due to the high center of gravity of commercial vehicles, they are often easily affected by centrifugal force when turning at high and low speeds, which may cause rollover accidents. [0003] In the prior art, many experts and scholars have carried out anti-rollover research of a single control system. Different single-system anti-rollover controls have different advantages and disadvantages, such as active suspension with large anti-rollover and anti-rollover torque, The anti-rollover effect is good, suitable for various vehicles, but additional hardware is req...

AI Technical Summary

Problems solved by technology

Among them, due to the high center of gravity of commercial vehicles, they are often easily affected by centrifugal force when turning at high and low speeds, which may cause rollover accidents

[0003] In the prior art, many experts and scholars have carried out anti-rollover research of a single control system. Different single-system anti-rollover controls have different advantages and disadvantages, such as active suspension with large anti-rollover and anti-rollover torque, The anti-rollover effect is good, suitable for various vehicles, but additional hardware is required, the cost is high, and the time lag of the electro-hydraulic suspension is too long, etc.; differential braking can be based on anti-lock braking system ABS or electro-mechanical braking EMB Wait to design the controller, which is easy to implement and low in cost, but the anti-rollover effect is limited; while the active steering control improves the vehicle’s rollover stability, it reduces the lateral acceleration, but reduces the vehicle’s turning ability, making the car ineffective. circumvent obstacles

The existing technology also integrates the above single controls, but only integrates the control programs, which can only solve the problem of program conflicts, but because the actuators are independent, they cannot be effectively integrated together, and it is impossible to achieve energy-saving and high-efficiency side protection. turn

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