| 摘要 |
Valve mechanism in an internal combustion engine, includes a valve play-take up mechanism in the form of a piston in a cylinder chamber at one end of an exhaust rocker arm, and a hydraulic circuit with valve elements for supplying or draining off pressure fluid to and from the cylinder chamber. A second cylinder chamber with a piston acting in an opposite direction is arranged in the rocker arm and communicates with the first-mentioned cylinder chamber. A brake rocker arm is mounted on the same rocker arm shaft as the exhaust rocker arm and has an outer end, which acts against the piston in the second cylinder chamber. The brake rocker arm has its own cam element with brake cam lobes to one side of the exhaust rocker arm cam element.
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