Compression release engine retarder for multi- cylinder...

Details Compression release engine retarder for multi- cylinder... Compression release engine retarder for multi- cylinder...

F - Mech Eng,Light,Heat,Weapons

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F01L 13/06 (2006.01) F01L 9/02 (2006.01) F02D 13/04 (2006.01) F02B 75/02 (2006.01)

Patent

CA 1247483

COMPRESSION RELEASE ENGINE RETARDER FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINES ABSTRACT OF THE DISCLOSURE A compression release engine retarder for a multi- cylinder four-stroke cycle engine is disclosed. The retarder incorporates an hydraulic pulse generator (85) which in one embodiment comprises a multi-chamber positive displace- ment pump of the piston (146) and cylinder (144) type which is positively driven at engine speed or at half engine speed in synchronism with the engine crankshaft (86). Means (84,96,97) are provided to adjust the timing of the hydraulic pulses so as to control precisely the opening of the engine exhaust valves and to maximize the compression release retarding power developed by the engine. Addition- al means (182,184,186,188,190,192,194) are provided to control the timing of the hydraulic pulses in response to the boost pressure in the engine inlet manifold produced by the engine turbocharger (Fig. 4A).

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