It is difficult to realize dynamic measuring for valve mechanism with a direct action type hydraulic lash adjuster (HLA) due to its compact structure and shorter driving chain of valve mechanism.
直动式气门机构液压间隙调节器(HLA)，由于结构紧凑、气门机构传动链短，难以实现动态测量。
2
The valve mechanism with hydraulic lash adjuster(HLA)has generally used in the modern automotive engine, especially in the car engine.
现代汽车发动机，尤其是轿车发动机，已普遍采用有液力间隙调节器（HLA）的气门机构。
3
Pretty flow pressure characteristics are being realized in the variable displacement pump with valveadjuster. But more violent flow pulse was proved by experiment at the range of higher pressure.