An anti-lock braking system (ABS) is an anti-skid braking system commonly used as a safety feature in vehicles. The hydraulic control unit for the ABS of a vehicle includes a plunger pump between the wheel and master cylinder. This paper presents numerical investigations of the effect of valve shapes on the performance improvement provided by a plunger pump, focusing on two different valve shapes, ball-type and hat-type. Transient laminar flow analyses of plunger pumps with ball and hat-type inlet valves are performed under motor speeds from 1000 to 5000 rpm using the fluid-structure interaction (FSI) and user-defined function (UDF) techniques. An experimental verification of the simulation results for the plunger pump with a ball-type valve was conducted using the standard pump test of the Mando Corporation, South Korea. A comparison of the simulation and experimental results suggests that these are in good agreement. The simulation results indicate that the hat-type valve outperforms the ball-type valve due to a shorter delay in the closing time at the end of the suction cycle. These findings suggest that valve shape has a considerable impact on the performance improvement provided by a plunger pump, providing crucial insights into the future design of high-efficiency pumps.

防抱死制动系统（ABS）是通常用作车辆安全功能的防滑制动系统。用于车辆的ABS的液压控制单元包括在车轮和主缸之间的柱塞泵。本文对阀形对柱塞泵性能改善的影响进行了数值研究，重点研究了两种不同的阀形，球形和帽形。使用流体结构相互作用（FSI）和用户定义的功能（UDF）技术，在1000至5000 rpm的电机转速下，对带有球阀和帽式进水阀的柱塞泵进行瞬态层流分析。使用韩国万都公司的标准泵测试对带有球形阀的柱塞泵的模拟结果进行了实验验证。仿真结果和实验结果的比较表明，这些结果吻合良好。仿真结果表明，由于在吸入循环结束时关闭时间的延迟较短，因此帽式阀的性能优于球形阀。这些发现表明，阀的形状对柱塞泵的性能改进有相当大的影响，这为高效泵的未来设计提供了重要的见识。