FIELD: mechanical engineering; valve timing mechanisms. SUBSTANCE: hydraulic cylinder, spacer spring, plunger with check valve and shell tightly mated with inner surface of housing. Open ring groove is made in shell at side of diaphragm opposite to oil feed hole. Output edge of groove is located lower than hole which forms hydraulic lock and precludes penetration of air. EFFECT: improved serviceability of hydraulic adjuster. 1 dwg
