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US 6,178,946 B2Granted
Compression engine braking system
OwnerJeff A. Matthews, Jerzi Baginskiinventors
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OwnerJeff A. Matthews, Jerzi Baginskiinventors
Estimating the term…
A compression engine braking system for an engine is disclosed having two exhaust valves 26a and 26b per cylinder, a crosshead 28 in contact with both exhaust valves 26a and 26b and a rocker 30 arranged in the drive train between an exhaust cam and the crosshead 28. One end of the rocker 30 acts on a point on the crosshead 28 lying between the exhaust valves 26a and 26b and the other end of the rocker is arranged to follow the surface of the exhaust cam. The braking system comprises a hydraulic primary piston 12 arranged in a hydraulic circuit 16 with a secondary cylinder 14 acting on one of the exhaust valves 26a. The primary cylinder is biased by a spring away from said other end of the rocker 30 when the compression brake is inactive and is biased by the pressure in the hydraulic circuit 16 to move with the other end of the rocker 30 when the compression brake is active. In the invention, a spring biased lash adjuster is arranged between the rocker 30 and the crosshead 28.
A compression relief engine braking system for an engine having two exhaust valves per cylinder, a crosshead in contact with both exhaust valves, a rocker arm arranged in the drive train between an exhaust cam and the crosshead, one end of the rocker arm acting on a point on the crosshead lying between the exhaust valves and the other end of the rocker arm being arranged to follow the surface of the exhaust cam, the braking system comprising a hydraulic primary piston arranged in a hydraulic circuit with a secondary cylinder acting on one of the exhaust valves, the primary cylinder being biased by a spring away from said other end of the rocker arm when the compression brake is inactive and being biased by the pressure in the hydraulic circuit to move with said other end of the rocker when the compression brake is active, characterised in that a spring biased lash adjuster is arranged between said one end of the rocker arm and the crosshead.
Dependencies are inferred from the claim text.