Which design is commonly used in high pressure gas pumps for suspension?

The design commonly used in high-pressure gas pumps for suspension is gas-charged cylinders. These cylinders are specifically engineered to utilize pressurized gas, such as nitrogen, to provide support and energy absorption in the suspension system. This method allows for a more efficient and consistent performance under varying loads and conditions.

Gas-charged cylinders can effectively manage the energy generated by impacts and road irregularities, resulting in a smoother ride and better handling characteristics. The pressurized gas helps maintain the necessary compression in the suspension system while minimizing the overall weight, which is crucial for high-performance applications in vehicles like the JLTV.

The other options, while relevant in various applications, do not offer the same level of performance and efficiency as gas-charged cylinders in this specific context. Mechanical springs, for instance, provide support but may not adapt well to rapid changes in load or terrain. Pneumatic cushions focus more on air pressure for support without the adaptability seen in gas-charged systems. Hydraulic cylinders utilize fluid dynamics but may not offer the same simplicity and weight benefits that gas-charged cylinders do, especially under high-pressure conditions.