The electronic stability control (ESC) system is a computerized technology that improves vehicle stability by detecting and reducing the loss of traction. The hydraulic control unit for an anti-lock braking system (ABS) or an ESC system in a car includes a hydraulic pump located between the wheel and master cylinder. The function of the hydraulic pump is to allow the brake fluid to return from the wheel to the master cylinder when the ABS or ESC is actuating. This study performs numerical investigations with the aim of predicting the performance of the hydraulic pump by better understanding the dynamic behavior characteristics of the inlet ball under instantaneous fluid forces during the suction cycle and the corresponding flow characteristics under various motor speeds. A fluid-structure interaction (FSI) simulation of the hydraulic pump is conducted under various motor speeds with an unsteady three-dimensional approach considering laminar flow and the user-defined function (UDF). Experimental verification of the simulation results at the standard pump pumping test system of the Mando Corporation in Korea indicates considerable reliability. The findings of this research can provide valuable insights into designing high-efficiency pumps.

电子稳定控制（ESC）系统是一种计算机技术，可通过检测和减少牵引力损失来提高车辆稳定性。用于汽车中的防抱死制动系统（ABS）或ESC系统的液压控制单元包括位于车轮和主缸之间的液压泵。液压泵的功能是在ABS或ESC致动时允许制动液从车轮返回到主缸。这项研究进行了数值研究，目的是通过更好地了解吸入球在吸入周期内的瞬时流体力下的动态特性以及在各种电动机转速下的相应流量特性，从而预测液压泵的性能。考虑到层流和用户定义函数（UDF），在不稳定的三维方法下，在各种电机转速下进行了液压泵的流固耦合（FSI）模拟。在韩国万都公司（Mando Corporation）的标准泵抽水测试系统上对模拟结果进行的实验验证表明，该产品具有很高的可靠性。这项研究的发现可以为设计高效泵提供有价值的见解。