Promoting Unit: Sanmen County Science and Technology Bureau

Project Overview:

1. Main technical content of the project:

(1) Leveraging ADAMS software, rigorously define all target stiffness values, operational load conditions, and other physical strain parameters; develop a fully parametric geometric model of the mechanical system; apply the Lagrange equations from multibody dynamics theory to formulate the system’s dynamic equations; and use these equations to predict the mechanical system’s performance, range of motion, collision detection, peak loads, and input loads for finite-element analysis. This enables an understanding of the dynamic characteristics of suspension-system components under load, assessment of their fatigue performance, simulation and testing of performance metrics for prototype designs, selection of the optimal design方案 that meets trial-manufacturing objectives, and achievement of structural optimization. (2) Select a rubber material with high strength, excellent heat and aging resistance, long service life, and strong adhesion to metals as the primary rubber spring material; conduct research on rubber formulation and vulcanization processes to address the challenges associated with this material in hydraulic suspensions. (3) Develop adhesive formulations and adopt a “stepwise transition from strong polarity to weak polarity” approach to construct double- or multi-layer adhesive bonds, thereby achieving exceptionally strong adhesion between metal and rubber. (4) Research and develop specialized production molds, rubber-testing equipment, and positioning tooling fixtures.

2. Status of Authorized Intellectual Property Rights:

During the implementation of this project, three invention patents were obtained: a semi-active hydraulic mount, a hydraulic mount, and a material torsion testing machine.

3. Main Technical Performance Indicators of the Product: Fatigue Testing

In the x-direction, with a temperature of 90°C ± 3°C, a preload (Z) of 956 N, a frequency of 5 Hz, and an Fx range of ±2000 N, after 200,000 cycles, the static and dynamic stiffness variations remain within ±30%, and the crack depth in the rubber or bonded joints does not exceed 3 mm.

In the y-direction, the temperature is 90°C ± 3°C, the pre-load (Z) is 956 N, the frequency is 5 Hz, and Fy is ±1500 N. After 100,000 cycles, the static and dynamic stiffness variations remain within ±30%, and the crack depth in the rubber or bonded joints does not exceed 3 mm.

In the z-direction, the temperature is 90°C ± 3°C, the pre-load (Z) is 956 N, the frequency is 5 Hz, and Fz = ±2250. After 400,000 cycles, the static and dynamic stiffness variations remain within ±30%, and the crack depth in the rubber or bonded joints does not exceed 3 mm.

4. Application Promotion and Achieved Economic and Social Benefits

Over the past three years, the project’s products have achieved total sales of 8.656 million units, generating RMB 290 million in sales revenue, RMB 42.93 million in additional profit, and RMB 28.75 million in tax payments, while creating 42 new jobs.

Third-party review:

Main appraisal (review and acceptance) opinions on scientific and technological achievements:

1. The materials submitted for appraisal are substantially complete, standardized, and compliant with the appraisal requirements;

2. The project’s product was specially commissioned by SAIC-GM-Wuling Automobile Co., Ltd. It adopts a third-generation hydraulic mount structure featuring an inertia channel, a decoupling disc, and a throttling disc, with the inertia channel enabling variable damping characteristics to effectively attenuate both low-frequency engine vibrations and high-frequency powertrain vibrations. The mount utilizes the company’s independently developed NR1481 material, which exhibits excellent fatigue resistance as well as superior dynamic and static stiffness. The product boasts outstanding vibration-damping performance and long service life.

3. The product has been inspected by Zhejiang Shitai Industrial Co., Ltd. (the company’s laboratory has obtained the Supplier Testing and Verification Capability Accreditation Certificate from SAIC-GM-Wuling Automobile Co., Ltd.: SGMW-CA-090), meets the product requirements, and has received SAIC-GM-Wuling Automobile Co., Ltd.’s approval for production launch. Field use has yielded positive feedback, demonstrating significant economic and social benefits.

4. The enterprise has obtained ISO/TS 16949:2009 certification for its quality management system, and its production equipment, process tooling, testing methods, and environmental protection measures all meet the requirements of production. The appraisal committee concludes that the product’s R&D has been successful and approves its acceptance.

Novelty Search Report:

Conclusion of the novelty search conducted by the Zhejiang Provincial Academy of Science and Technology Information: Following comparative analysis, the engine-side vibration isolator developed by the commissioning entity for the Baojun 730 adopts a third-generation hydraulic mount—a hydraulic mount featuring an inertial channel–decoupling disc–throttle disc configuration. This design achieves variable damping characteristics through the inertial channel: at low frequencies with large amplitudes, damping is high, effectively attenuating low-frequency engine vibrations; at high frequencies, the damping fluid flows directly through, exhibiting the low-damping characteristics of pure rubber, which helps to mitigate high-frequency vibrations of the powertrain, thereby demonstrating distinctive performance features.

Application and promotion status:

The products are primarily sold in finished form, and no technology transfer has taken place.

Economic and social benefits:

In 2015, this project generated an additional RMB 83.6661 million in sales revenue and RMB 8.2749 million in tax revenue; in 2016, under the new policies, sales revenue reached RMB 99.7735 million, with an additional RMB 11.9194 million in tax revenue; and in 2017, sales revenue increased by RMB 110.8622 million, generating an additional RMB 8.563 million in tax revenue.

This project has created more than 40 jobs, thereby boosting the economic development of the local region. While promoting the growth of the industry, it has also stimulated the development of manufacturers of automotive accessories and raw-material suppliers. The project’s advanced nature not only enhances product quality but also reduces raw-material waste during R&D, lowers energy consumption, and cuts production costs, delivering significant environmental and social benefits.