Engine retarding method and apparatus

Details Engine retarding method and apparatus Engine retarding method and apparatus

F - Mech Eng,Light,Heat,Weapons

01

L

123/183

F01L 13/06 (2006.01) F02D 13/04 (2006.01)

Patent

CA 1271675

ENGINE RETARDING METHOD AND APPARATUS ABSTRACT OF THE DISCLOSURE Process and apparatus are provided for the compres- sion release retarding of a multi cylinder four cycle internal combusion engine, the process providing a compres- sion release event and a bleeder event or a second compression release event for each engine cylinder during each complete engine cycle while employing only one intake valve opening per engine cycle. In one embodiment, the normal motion of the exhaust valve is disabled and replaced with an opening of the exhaust valve at about the top dead center position of the engine piston following the compression stroke; maintaining the exhaust valve in the open position during the expansion stroke; partially closing the exhaust valve during the exhaust stroke; and fully closing the exhaust valve during the intake stroke. In another embodiment, the normal intake valve opening is delayed and the normal motion of the exhaust valve is dis- abled and replaced with an opening of the exhaust valve at about the top dead center position of the engine piston following the compression stroke; maintaining the exhaust valve in the open position during the expansion stroke; closing the exhaust valve at the end of the expansion stroke; and opening the exhaust valve briefly at about the next top dead center position of the engine piston. The apparatus includes hydraulic and mechanical means to disable and/or modify the movements of the exhaust and intake valves during the braking mode of the apparatus which includes hydraulic, mechanical and electrical means to manipulate the exhaust and intake valves as required to perform the process and operate the apparatus.

509920

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