Internal-combustion engines – Charge forming device – With fuel pump
Patent
1997-03-18
1998-09-15
Miller, Carl S.
Internal-combustion engines
Charge forming device
With fuel pump
123509, 123 9027, F02M 3704
Patent
active
058064990
ABSTRACT:
The present invention provides an internal combustion engine drive train actuating assembly which includes a dual overhead cam shaft arrangement wherein a pair of cam shafts is supported in the head section of the engine. One cam shaft is positioned to actuate the intake and exhaust valves. The other cam shaft is dedicated to actuating only the unit fuel injectors and is positioned relative to the injector actuating rocker levers to contact only these rocker levers during engine operation. The rocker lever-contacting lobes on the dedicated injector-actuating cam shaft are dimensionally wider than has heretofore been possible, which allows the high fuel injection pressures required to achieve optimum fuel economy and emissions while minimizing hertz stresses on the cam shaft.
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Perr Andrew P.
Stover Thomas R.
Cummins Engine Company, Inc.
Lawrence Joan K.
Leedom Jr. Charles M.
Miller Carl S.
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