| 摘要 |
<p>PCT No. PCT/SE94/00370 Sec. 371 Date Oct. 18, 1995 Sec. 102(e) Date Oct. 18, 1995 PCT Filed Apr. 26, 1994 PCT Pub. No. WO94/25740 PCT Pub. Date Nov. 10, 1994Exhaust valve mechanism with a rocker arm (1) having a hydraulic circuit with a hydraulically operated valve play absorbing piston element (7). The hydraulic circuit contains a piston pump (20, 21) housed in the rocker arm and which is driven by an ordinary cam lobe (4) on the engine cam shaft (5). The piston (21) of the piston pump has a cam follower (23) spaced at a predetermined cam angle distance (a) from the ordinary cam follower (3) of the rocker arm. The pump is in communication via a channel (24) and intermediate regulator valve (30) with the cylinder (6) of the valve play absorbing piston element. With the regulator valve, the piston element (7) can be shifted to open the exhaust valve during a latter portion compression stroke to achieve so-called compression braking.</p> |
