为解决采用涡轮增压器后带来的收油泄气声品质问题,对问题工况进行测试,并确定收油异响的辐射源。通过对泄压阀工作原理进行研究,确认该异响为泄压阀泄气不及时造成的压气机瞬时喘振,从而形成噪声。最后,采用将泄压阀弹簧刚度调低,减小泄压阀开启压力的方式,使泄压阀及时开启泄压,消除该噪声。 In order to solve the sound quality problem of oil scavenging caused by adopting turbocharger, the problem condition was tested and the source of abnormal sound emission was confirmed. By studying the working principle of the relief valve, it is confirmed that the abnormal noise is instantaneous surge of the compressor caused by the leak of the relief valve in time, thus forming noise. Finally, by reducing the spring stiffness of the relief valve to reduce the pressure on the relief valve, the relief valve opens the relief pressure in time to eliminate the noise.