EP-4737142-A1 - AIR SUSPENSION SYSTEM AND VEHICLE

EP4737142A1EP 4737142 A1EP4737142 A1EP 4737142A1EP-4737142-A1

Abstract

This application provides an air suspension system and a vehicle. The air suspension system includes a first air spring, a second air spring, and an air storage component. The air suspension system further includes a first solenoid valve connected to the first air spring, a second solenoid valve connected to the second air spring, a third solenoid valve connected between the first solenoid valve and the air storage component, and a fourth solenoid valve connected between the second solenoid valve and the air storage component. In a case in which the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all powered on and turned on, the first solenoid valve, the third solenoid valve, and the air storage component form a first air path, the second solenoid valve, the fourth solenoid valve, and the air storage component form a second air path, the air storage component inflates the first air spring through the first air path, and the air storage component inflates the second air spring through the second air path, so that a vehicle body height of a front axle and a vehicle body height of a rear axle of the vehicle can be synchronously raised.

Inventors

LIU, Xuhui
HE, Lang
LIU, Donghao

Assignees

Shenzhen Yinwang Intelligent Technologies Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240727

Claims (11)

An air suspension system, applied to a vehicle, wherein the air suspension system comprises a first air spring, a second air spring, and an air storage component, the first air spring is configured to adjust a vehicle body height of a front axle of the vehicle, and the second air spring is configured to adjust a vehicle body height of a rear axle of the vehicle; the air suspension system further comprises: a first solenoid valve, connected to the first air spring; a second solenoid valve, connected to the second air spring; a third solenoid valve, connected between the first solenoid valve and the air storage component; and a fourth solenoid valve, connected between the second solenoid valve and the air storage component; and the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all capable of being turned on when powered on, or capable of being turned off when powered off, in a case in which the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all powered on and turned on, the first solenoid valve, the third solenoid valve, and the air storage component form a first air path, the second solenoid valve, the fourth solenoid valve, and the air storage component form a second air path, the air storage component inflates the first air spring through the first air path, and the air storage component inflates the second air spring through the second air path.
The air suspension system according to claim 1, wherein the air suspension system further comprises a deflation unit and a fifth solenoid valve, the deflation unit is connected to the first solenoid valve, the fifth solenoid valve is connected between the first solenoid valve and the second solenoid valve, and the fifth solenoid valve is turned on when powered on, or turned off when powered off.
The air suspension system according to claim 2, wherein in a case in which the third solenoid valve fails, when the fifth solenoid valve is powered on and turned on, the air storage component, the fourth solenoid valve, the fifth solenoid valve, and the first solenoid valve are capable of forming a path to inflate the first air spring, and the second solenoid switch, the fifth solenoid valve, and the deflation unit are capable of forming a path to deflate the second air spring.
The air suspension system according to claim 2, wherein in a case in which the fourth solenoid valve fails, the fifth solenoid valve is powered on and turned on, the air storage component, the third solenoid valve, the fifth solenoid valve, and the second solenoid switch are capable of forming a path to inflate the second air spring, and the second solenoid switch, the fifth solenoid valve, and the deflation unit are capable of forming a path to deflate the second air spring.
The air suspension system according to any one of claims 2 to 4, wherein the air storage component comprises a first air storage tank and a second air storage tank, the third solenoid valve is connected between the first air storage tank and the first solenoid valve, and the fourth solenoid valve is connected between the second air storage tank and the second solenoid valve.
The air suspension system according to claim 5, wherein in a case in which the first air storage tank fails, when the fifth solenoid valve, the fourth solenoid valve, and the first solenoid valve are all powered on and turned on, and the third solenoid valve is powered off and turned off, the fourth solenoid valve, the fifth solenoid valve, and the first solenoid valve communicate with the second air storage tank, to inflate the first inflation spring.
The air suspension system according to claim 5, wherein in a case in which the second air storage tank fails, the fourth solenoid valve is powered off and turned off, the third solenoid valve and the fifth solenoid valve are powered on and turned on, and the third solenoid valve, the fifth solenoid valve, and the second solenoid valve communicate with the first air storage tank, to inflate the second inflation spring.
The air suspension system according to any one of claims 1 to 4, wherein the air storage component comprises a first output port and a second output port, the first output port is connected to the third solenoid valve, and the second output port is connected to the fourth solenoid valve.
The air suspension system according to any one of claims 1 to 8, wherein there are at least two first air springs, a quantity of first solenoid valves is in a one-to-one correspondence with a quantity of first air springs, there are at least two second air springs, and a quantity of second solenoid valves is in a one-to-one correspondence with a quantity of second air springs.
The air suspension system according to any one of claims 1 to 9, wherein the air suspension system further comprises a first pressure sensor, and the first pressure sensor is connected to the air storage component and configured to detect air pressure in the air storage component.
A vehicle comprising the air suspension system according to any one of claims 1 to 10.

Description

This application claims priority to Chinese Patent Application No. 202310996395.4, filed with the China National Intellectual Property Administration on August 7, 2023, and entitled "AIR SUSPENSION SYSTEM AND VEHICLE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of suspension technologies, and in particular, to an air suspension system and a vehicle. BACKGROUND As people pursue a better driving experience, they have higher requirements for safety and comfort of transportation means. In recent years, vehicles increasingly use intelligent electronically controlled components such as an electronically controlled air suspension (Electronic Air Suspension) system. The electronically controlled air suspension system can adjust a vehicle body height based on a choice of a driver, to improve ride comfort, handling stability, and the like of the vehicle. However, although the existing electronically controlled air suspension system has a basic height adjustment function, a vehicle body height of a front axle of the vehicle cannot be adjusted synchronously with a vehicle body height of a rear axle of the vehicle. This results in adverse impact on comfort and safety of the vehicle. SUMMARY Embodiments of this application provide an air suspension system and a vehicle, to synchronously raise a vehicle body height of a front axle and a vehicle body height of a rear axle of the vehicle. According to a first aspect, this application provides an air suspension system, applied to a vehicle. The air suspension system includes a first air spring, a second air spring, and an air storage component. The first air spring is configured to adjust a vehicle body height of a front axle of a vehicle. The second air spring is configured to adjust a vehicle body height of a rear axle of the vehicle. The air suspension system further includes a first solenoid valve connected to the first air spring, a second solenoid valve connected to the second air spring, a third solenoid valve connected between the first solenoid valve and the air storage component, and a fourth solenoid valve connected between the second solenoid valve and the air storage component. The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve can all be turned on when powered on, or be turned off when powered off. In a case in which the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all powered on and turned on, the first solenoid valve, the third solenoid valve, and the air storage component form a first air path, and the second solenoid valve, the fourth solenoid valve, and the air storage component form a second air path. The air storage component inflates the first air spring through the first air path, and the air storage component inflates the second air spring through the second air path. The first air spring and the second air spring are separately inflated through different air paths. Inflation of the first air spring by the air storage component and inflation of the second air spring by the air storage component do not affect each other. Even if pressure in the first air spring is different from that in the second air spring, a higher-pressure air spring of the first air spring and the second air spring does not inflate a lower-pressure air spring, thereby synchronously raising the vehicle body height of the front axle and the vehicle body height of the rear axle of the vehicle, and reducing a possibility that a vehicle body is lowered when the front axle and the rear axle of the vehicle are synchronously raised in height. This helps improve comfort and safety of the vehicle. In addition, because the first air spring and the second air spring are separately inflated through different air paths, the first air spring and the second air spring do not need to be alternately inflated, to alternately raise the vehicle body height of the front axle and the vehicle body height of the rear axle of the vehicle. This helps improve inflation efficiency of the air suspension system and efficiency in raising the vehicle body. According to the first aspect, in a possible implementation of this application, the air suspension system further includes a deflation unit and a fifth solenoid valve. The fifth solenoid valve is connected between the first solenoid valve and the second solenoid valve. The fifth solenoid valve is turned on when powered on, or is turned off when powered off. A solenoid control valve is introduced between a first solenoid valve of the front axle and a second valve of the rear axle, so that reliability and availability of the entire air suspension system are achieved. The fifth solenoid valve is powered off and turned off in a process of synchronously raising the vehicle body height of the front axle and the vehicle body height of the rear axle of the vehicle. In this way, t