F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
171/28
F02B 75/18 (2006.01) F02B 33/04 (2006.01) F02B 33/28 (2006.01) F02M 1/04 (2006.01) F02B 61/04 (2006.01) F02B 75/02 (2006.01)
Patent
CA 1199587
Starting Enrichment Of Alternate Firing Two Cycle Internal Combustion Engine Abstract A two cycle internal combustion engine (10) has at least two cylinders (12, 13) which fire alternately with pressure in one crankcase (17 or 18) at the time there is vacuum in the other. Supplemental fuel flow passages (36, 41) extend from each crankcase and are joined at a common passage (46) connected to the float bowl (30) of the carburetor (20). A normally closed control valve (48) is disposed in the common passage. When the engine is to be started, the control valve is opened so that fuel enters the supplemental and common passage. Initial rotation of the crank- shaft (16) causes pressure in one crankcase to force fuel toward the other crankcase, which has vacuum. Further crankshaft rotation reverses the pressures so that fuel is then forced toward the opposite crankcase. Continued engine operation with the control valve open causes alternate fuel flow reversals together with pressurized alternate fuel injections into the respective crank- cases, which are independent of the throttle setting.
442766
Brunswick Corporation
Meredith & Finlayson
LandOfFree
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