초록 ▼

A decompression engine brake device is incorporated with an internal combustion engine. The device comprises an exhaust valve arranged to open and close an exhaust port of a combustion chamber of the engine. A valve stem extends from the exhaust valve. A valve lifter is slidably disposed in a cylind

A decompression engine brake device is incorporated with an internal combustion engine. The device comprises an exhaust valve arranged to open and close an exhaust port of a combustion chamber of the engine. A valve stem extends from the exhaust valve. A valve lifter is slidably disposed in a cylinder head of the engine. The valve lifter has the valve stem contacting thereto. An exhaust cam disposed about an exhaust cam shaft is operatively engageable with the valve lifter to actuate the exhaust valve in accordance with a contour of the exhaust cam. An engine brake cam is defined by the exhaust cam. A hydraulically operating device is employed for inducing an operative engagement between the engine brake cam with the valve lifter thereby to actuate the exhaust valve in accordance with a contour of the engine brake cam.

대표청구항 ▼

[ What is claimed is:] [1.] A decompression engine brake device for use with an internal combustion engine, comprising:an exhaust valve arranged to open and close an exhaust port extending from a combustion chamber of the engine;a valve stem extending from said exhaust valve;a valve lifter slidably

[ What is claimed is:] [1.] A decompression engine brake device for use with an internal combustion engine, comprising:an exhaust valve arranged to open and close an exhaust port extending from a combustion chamber of the engine;a valve stem extending from said exhaust valve;a valve lifter slidably disposed in a cylinder head of the engine, said valve lifter having said valve stem in contact therewith;an exhaust cam shaft;an exhaust cam disposed about said exhaust cam shaft and operatively engageable with said valve lifter to actuate said exhaust valve in accordance with a contour of said exhaust cam;an engine brake cam defined by said exhaust cam;a plunger axially movably held by said valve lifter, said plunger having an upper end that is operatively engageable with said engine brake cam;a slider transversely movably held in said valve lifter, said slider having an inclined surface which a lower end of said plunger slidably contacts; andan actuating device for moving said slider in first and second directions thereby axially moving said plunger.