CN-121989611-A - Commercial vehicle EBS system and vehicle integrated with electric control air suspension

CN121989611ACN 121989611 ACN121989611 ACN 121989611ACN-121989611-A

Abstract

The invention discloses a commercial vehicle EBS system integrating an electric control air suspension and a vehicle, wherein the system comprises an air source unit, a brake control unit, an air suspension control unit and an execution unit, the air source unit comprises an inflation pump, a front axle air storage cylinder, a rear axle air storage cylinder, an air suspension air storage cylinder, a first overflow valve and a second overflow valve to form a redundant air supply loop, the brake control unit comprises an EBS integrated control unit, a foot valve and a brake air circuit, an air suspension air inlet electromagnetic valve, an air suspension air outlet electromagnetic valve and a height sensor of the air suspension control unit are directly connected with the EBS integrated control unit through hard wires, the integration level is improved from a hardware architecture, the system cost and the fault risk are reduced, the communication delay of a cross unit is eliminated through hard wire connection, the stability of redundant air supply is guaranteed, the high-efficiency cooperation of the brake and the suspension is realized, and the high-order auxiliary driving requirement is met.

Inventors

Nie xingfu
YAO SHENGLI
ZHANG WEILONG
Chen tuo
JIN YIDONG

Assignees

陕西法士特汽车传动集团有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260104

Claims (10)

1. A commercial vehicle EBS system integrated with an electrically controlled air suspension, comprising: the device comprises an air source unit, a brake control unit, an air suspension control unit and an execution unit; The air source unit comprises an inflating pump, a front axle air cylinder, a rear axle air cylinder, an air suspension air cylinder, a first overflow valve and a second overflow valve, wherein an air outlet of the inflating pump is respectively communicated with air inlets of the front axle air cylinder and the rear axle air cylinder in a sealing manner through air paths, and the front axle air cylinder and the rear axle air cylinder are communicated with the air inlets of the air suspension air cylinder in a sealing manner through corresponding overflow valves and a summarizing air path to form a redundant air supply loop; The brake control unit comprises an EBS integrated control unit, a foot valve and a brake air channel, wherein the foot valve is connected with the EBS integrated control unit through a hard wire in an electric signal manner, the EBS integrated control unit is integrated with a rear axle module assembly, and an air inlet end of the EBS integrated control unit is communicated with a rear wheel brake execution end through the brake air channel in a sealing manner; the air suspension control unit comprises an air suspension air inlet electromagnetic valve, an air suspension air outlet electromagnetic valve and a height sensor, the air suspension air storage cylinder is communicated with the air bag through the air circuit and the air suspension air inlet electromagnetic valve in a sealing way, the air outlet of the air bag is communicated with the air inlet of the air suspension air outlet electromagnetic valve in a sealing way, and the air outlet of the air suspension air outlet electromagnetic valve is communicated with the atmosphere; And a signal output pin of the height sensor, control pins of the air inlet electromagnetic valve and the air outlet electromagnetic valve are correspondingly connected with signal input pins and signal output pins of the EBS integrated control unit respectively through the hard wires.
2. The EBS system of a commercial vehicle integrated with an electrically controlled air suspension according to claim 1, wherein in a redundant air supply loop of the air source unit, an air outlet of the front axle air receiver is in sealed communication with an air inlet of the first overflow valve through a first air path, and an air outlet of the first overflow valve is in sealed communication with a first access end of the collecting air path through a second air path; the air outlet of the rear axle air cylinder is communicated with the air inlet of the second overflow valve in a sealing way through a third air passage, and the air outlet of the second overflow valve is communicated with the second access end of the collecting air passage in a sealing way through a fourth air passage; the output end of the gathering gas circuit is communicated with the gas inlet of the air suspension gas cylinder in a sealing way; The first overflow valve and the second overflow valve are respectively and independently controlled to be on-off, and when the air pressure of any one of the front axle air storage cylinder or the rear axle air storage cylinder is abnormal, the other air cylinder can continuously supply air to the air suspension air storage cylinder through the corresponding air circuit, the corresponding overflow valve and the summarizing air circuit.
3. The commercial vehicle EBS system of an integrated electronic control air suspension according to claim 2, wherein the opening and closing of the first overflow valve is controlled by the air pressure of the front axle air reservoir, when the air pressure in the front axle air reservoir reaches a preset opening threshold, the first overflow valve is automatically opened, the front axle air reservoir supplies air to the air suspension air reservoir in a sealing manner sequentially through the first overflow valve and the collecting air channel, and when the air pressure in the front axle air reservoir is lower than a preset closing threshold, the first overflow valve is automatically closed to cut off the air supply link from the front axle air reservoir to the air suspension air reservoir; the opening and closing of the second overflow valve is controlled by the air pressure of the rear axle air cylinder, when the air pressure in the rear axle air cylinder reaches a preset opening threshold value, the second overflow valve is automatically opened, the rear axle air cylinder sequentially passes through the second overflow valve and the collecting air passage to supply air to the air suspension air cylinder in a sealing manner, and when the air pressure in the rear axle air cylinder is lower than a preset closing threshold value, the second overflow valve is automatically closed to cut off an air supply link from the rear axle air cylinder to the air suspension air cylinder.
4. The EBS system of a commercial vehicle integrated with an electrically controlled air suspension according to claim 1, wherein the EBS integrated control unit integrates a rear axle valve body to form a rear axle module assembly, and the EBS integrated control unit is integrally provided with a second right air inlet and a second left air inlet; The second right air inlet is integrally formed with two air outlet interfaces, and is respectively communicated with a brake actuating mechanism of the first right rear wheel and the second right rear wheel in a sealing way through a brake air path; The second left air inlet is integrally formed with two air outlet interfaces, and a brake actuating mechanism of the first left rear wheel and the second left rear wheel is respectively communicated with the second left air inlet in a sealing way through a brake air path.
5. The commercial vehicle EBS system integrated with the electric control air suspension system according to claim 1, wherein the EBS integrated control unit adopts an electromagnetic valve which is electrically connected with a front axle module through a hard wire, can directly output a control signal to drive the electromagnetic valve of the front axle module to act, and further realizes accurate regulation and control of front axle braking air pressure; the front axle module is provided with two independent air inlets, namely a first air inlet and a second air inlet, wherein a first left air outlet is correspondingly arranged on the first air inlet, a first right air outlet is correspondingly arranged on the second air inlet, and each air inlet and the corresponding air outlet form an independent air pressure transmission passage in a one-to-one correspondence manner.
6. The commercial vehicle EBS system integrated with the electric control air suspension according to claim 1, wherein an air outlet of the air suspension air inlet electromagnetic valve is connected with a first right rear wheel, a second right rear wheel, a first left rear wheel and a second left rear wheel through a plurality of branch air paths, and is in one-to-one sealing communication with air bag air inlets matched with the first right rear wheel, the second right rear wheel, the first left rear wheel and the second left rear wheel respectively through the plurality of branch air paths; The exhaust port of each air bag is communicated with the air inlet of the air suspension exhaust electromagnetic valve in a sealing way through an integrated exhaust gas path.
7. The EBS system of a commercial vehicle incorporating an electrically controlled air suspension according to claim 1, wherein the initial states of the air intake solenoid valve and the air exhaust solenoid valve are both de-energized closed; When the air inlet electromagnetic valve is electrified and opened, the air in the air storage cylinder is inflated to the air bag through the air inlet electromagnetic valve; when the air suspension exhaust electromagnetic valve is electrified and opened, the air in the air bag is discharged to the atmosphere through the air suspension exhaust electromagnetic valve.
8. The EBS system for a commercial vehicle integrated with an electrically controlled air suspension according to claim 1, wherein the EBS integrated control unit internally integrates a front axle control module and a foot valve control module; The signal output pin of the front axle control module is electrically connected with the control input end of the front axle brake electromagnetic valve through a hard wire; And a signal input pin of the foot valve control module is electrically connected with a signal output pin of the foot valve of the brake control unit through a hard wire.
9. The commercial vehicle EBS system of an integrated electrically controlled air suspension of claim 1, wherein said height sensor is configured to acquire vehicle suspension height signals in real time; The EBS integrated control unit is used for receiving the height signal and judging the vehicle load according to the height signal, and outputting a control signal through a hard wire based on the vehicle load information and a preset suspension height threshold value so as to regulate and control the on-off states of the air inlet electromagnetic valve and the air outlet electromagnetic valve.
10. The vehicle is characterized by comprising the commercial vehicle EBS system integrated with the electric control air suspension according to any one of claims 1-9, wherein the air source unit, the brake control unit and the suspension control unit are all arranged in a preset mounting area of a vehicle chassis, and the execution unit is assembled with a front axle, a rear axle and wheels of the vehicle in a one-to-one correspondence manner so as to realize cooperative control of vehicle brake and suspension height.

Description

Commercial vehicle EBS system and vehicle integrated with electric control air suspension Technical Field The invention belongs to the technical field of vehicle EBS systems, and particularly relates to a commercial vehicle EBS system integrated with an electric control air suspension and a vehicle. Background The cooperative control of a commercial vehicle brake by wire system (EBS) and an electrically controlled air suspension system (ECAS) is critical to the safety and comfort of a vehicle, the existing integration scheme mostly adopts a distributed architecture, the EBS and the ECAS are respectively provided with an independent Electronic Control Unit (ECU), the communication is realized through a high-speed CAN line, the integration of a functional layer is achieved only through software logic and a communication protocol, and the hardware integration level is extremely low. Even though the chassis domain control platform proposed by the main stream provider integrates the functions of the EBS, the ESC and the like into the same controller, the ECAS is still an independent ECU, and cooperation is realized only through deep coupling. Domestic suppliers are mature in the distributed control technology of physical separation and logic integration, but domain controller level hardware integration still is in a research and development breakthrough stage, the distributed architecture has the problems of high ECU number, complex wiring harness and connectors and the like, so that the cost is high, the weight of the whole vehicle is large, the fault points are increased, and meanwhile, the inter-ECU data interaction delay is high, so that the requirements of high-order auxiliary driving on the rapidity and complexity of cooperative control are difficult to meet. Disclosure of Invention The invention aims to provide a commercial vehicle EBS system integrated with an electric control air suspension and a vehicle, which are used for solving the technical defects of low hardware integration level, complex ECU and wire harness, high cost, multiple fault points and high cross-unit data interaction delay of the existing EBS and ECAS integration scheme in the prior art. The technical scheme adopted by the invention is as follows: In a first aspect of the present application, there is provided a commercial vehicle EBS system incorporating an electrically controlled air suspension, comprising: the device comprises an air source unit, a brake control unit, an air suspension control unit and an execution unit; The air source unit comprises an inflating pump, a front axle air cylinder, a rear axle air cylinder, an air suspension air cylinder, a first overflow valve and a second overflow valve, wherein an air outlet of the inflating pump is respectively communicated with air inlets of the front axle air cylinder and the rear axle air cylinder in a sealing manner through air paths, and the front axle air cylinder and the rear axle air cylinder are communicated with the air inlets of the air suspension air cylinder in a sealing manner through corresponding overflow valves and a summarizing air path to form a redundant air supply loop; The brake control unit comprises an EBS integrated control unit, a foot valve and a brake air channel, wherein the foot valve is connected with the EBS integrated control unit through a hard wire in an electric signal manner, the EBS integrated control unit is integrated with a rear axle module assembly, and an air inlet end of the EBS integrated control unit is communicated with a rear wheel brake execution end through the brake air channel in a sealing manner; the air suspension control unit comprises an air suspension air inlet electromagnetic valve, an air suspension air outlet electromagnetic valve and a height sensor, the air suspension air storage cylinder is communicated with the air bag through the air circuit and the air suspension air inlet electromagnetic valve in a sealing way, the air outlet of the air bag is communicated with the air inlet of the air suspension air outlet electromagnetic valve in a sealing way, and the air outlet of the air suspension air outlet electromagnetic valve is communicated with the atmosphere; And a signal output pin of the height sensor, control pins of the air inlet electromagnetic valve and the air outlet electromagnetic valve are correspondingly connected with signal input pins and signal output pins of the EBS integrated control unit respectively through the hard wires. In an alternative embodiment, in the redundant air supply loop of the air source unit, the air outlet of the front axle air cylinder is communicated with the air inlet of the first overflow valve in a sealing way through a first air path, and the air outlet of the first overflow valve is communicated with the first access end of the collecting air path in a sealing way through a second air path; the air outlet of the rear axle air cylinder is communicated with the air inlet of the s