I. Industry Background: Rapid Popularization of Air Suspensions Drives Upgraded Testing Requirements

As consumers increasingly pursue better vehicle ride comfort and handling stability, air suspensions have rapidly expanded from luxury vehicles to mainstream passenger cars, while the adoption rate in commercial vehicles continues to rise, fueling sustained market growth. In 2023, China’s automotive air spring market reached RMB 6.83 billion, with a year-on-year growth of 29.7%. From January to October 2025, the standard installation volume of air suspensions for domestic passenger vehicles reached 932,000 sets, and the standard penetration rate increased to 5.0%.

As the core component of air suspension systems, air springs determine vehicle load capacity, driving safety and riding comfort through key indicators including air tightness, static stiffness and telescopic performance. Working under continuous alternating loads and internal air pressure, air springs are prone to sealing failure and stiffness deviation. Undetected defects during R&D verification and factory quality inspection will cause potential safety risks. Therefore, high-precision static performance test systems that can restore real working conditions and deliver reliable data have become essential equipment for air spring manufacturers and automobile OEMs.

II. Product Positioning: Customized for Air Spring Static Performance Verification

Developed by Shenzhen Sansi Testing Technology Co., Ltd., the EUT7205/NY126 automotive air spring static performance testing machine is professional equipment for testing air spring pressure resistance, static load capacity, air tightness and other core performances. Designed in strict accordance with GB/T 13061-2017 (Commercial Vehicle Air Spring Specification) and T/CSAE 312-2023 (Passenger Vehicle Air Spring Specification), the machine is widely applied in R&D parameter calibration and batch production quality inspection, providing accurate and traceable test data for full-life-cycle quality management of automotive air springs.

III. Core Technology: Modular Structure & High-Precision Closed-Loop Control

The equipment adopts an integrated three-module design, including a specimen mounting platform, air pressure control system, and data acquisition and processing system. Equipped with a rigid electric-cylinder-based frame, it delivers stable mechanical performance and humanized operation, greatly improving testing stability and compatibility.

1. Servo Electric Cylinder Drive: High Precision, Stability and Anti-Interference Performance

The machine is equipped with a 200kN high-precision servo electric cylinder, which converts rotational motion into precise linear displacement. Compared with traditional hydraulic systems, the servo electric cylinder features fast response, superior positioning accuracy and zero oil leakage risk. It provides a load range of 0–200kN and a stepless adjustable displacement speed of 0.01–100mm/min, fully covering testing demands for both passenger vehicle and commercial vehicle air springs.

2. Closed-Loop Air Pressure Control: Accurate Restoration of Actual Working Conditions

The air pressure system adopts a combined control solution of an electric proportional valve and pneumatic booster pump. Pressure sensors feed real-time internal pressure data back to the PLC controller to form a high-stability closed-loop pressure regulation system. It achieves a pressure range of 0.2–1.6MPa, with a control accuracy of ±1%FS and a data acquisition accuracy of ±0.5%FS. It supports isothermal constant pressure and isothermal variable pressure tests, accurately simulating real operating states of air springs under different inflation pressures and loads.

3. Synchronous Five-Parameter Acquisition: Complete and Traceable Test Data

The system realizes synchronous real-time collection and coordinated control of five core parameters: load, displacement, speed, air pressure and outer diameter, simplifying testing procedures and improving efficiency. The high-precision laser outer diameter sensor offers a measuring range of 0–600mm with an accuracy of ±0.01mm. The load and air pressure acquisition accuracy reaches ±0.5%FS, and the displacement accuracy is ±0.3%FS. Supported by high-end sensors and high-frequency sampling, the equipment outputs continuous, stable test data, automatically generates smooth curves and standardized reports, and ensures full data traceability.

IV. Functional Coverage: Full-Scenario Static Testing for Diverse Air Spring Types

This all-in-one testing machine completes all core static performance tests for automotive air springs, covering full R&D and quality inspection scenarios:

1. Air Tightness Test: Precisely controls air pressure, measures pressure holding leakage rate under different internal pressures, and identifies sealing weak points;

2. Telescopic Performance Test: Simulates standard telescopic strokes to detect mechanical performance changes throughout the full travel range;

3. Static Load Performance Test: Conducts accurate graded loading to verify vertical static stiffness and load capacity under different air pressure conditions;

4. Custom Working Condition Test: Supports isothermal constant pressure and isothermal variable pressure tests to meet standard and customized testing requirements.

The equipment can accommodate various types of air springs—including diaphragm, bellows, and composite types—according to the fixture’s working conditions. Equipped with a quick‑alignment locking mechanism and plug‑in pneumatic interfaces, it enables convenient clamping and efficient switching between operating conditions, significantly improving testing efficiency.

V. Intelligent Software & Premium After-Sales Service for Efficient R&D and QC

The equipment is matched with a dedicated Windows-based measurement and control software with modular engineering analysis architecture, featuring stable operation and simple operation. It supports full-automatic test operation, real-time data acquisition, long-term data storage and historical record query. Standard test reports can be automatically generated, exported and printed for data analysis and sharing, perfectly adapting to standardized enterprise R&D and quality inspection processes with lifetime free software upgrades.

Sansi Testing provides a comprehensive after-sales service system for all users. We offer a 5-minute rapid response for troubleshooting and on-site technical support within 48 hours if required. Free equipment installation, commissioning and professional operation training are provided, together with lifetime technical support and maintenance services to reduce overall operating costs. The original factory equipment adapts to conventional laboratory power supply and air source conditions for quick and convenient on-site deployment.

With the accelerating localization of automotive core components, independent and high-precision air spring testing equipment has become vital to the high-quality development of the automotive industry. Leveraging years of professional mechanical testing technology, Sansi Testing’s EUT7205/NY126 air spring static performance testing machine integrates high precision, complete functions and high practicability. It helps automobile OEMs and suspension component manufacturers strictly control product quality, accelerate domestic iteration of air spring products, and consolidate quality assurance for automotive chassis component reliability.