| 摘要 |
<p>PCT No. PCT/SE96/00346 Sec. 371 Date Nov. 18, 1997 Sec. 102(e) Date Nov. 18, 1997 PCT Filed Mar. 19, 1996 PCT Pub. No. WO96/29508 PCT Pub. Date Sep. 26, 1996Exhaust valve mechanism in an internal combustion engine, comprising a valve play take-up mechanism in the form of a piston (8) disposed in a cylinder chamber (7) at one end of a rocker arm (1) and a hydraulic circuit with valve means (20) for supplying and draining oil to and from the cylinder chamber. Controlled check valve means (22) prevent, at a certain pressure in the hydraulic circuit, drainage of oil from the cylinder chamber. A bypass valve (40) controlled by the rocking movement of the rocker arm opens for draining the cylinder chamber before the exhaust valve reaches the top of its lift curve.</p> |
