초록 ▼

A fuel distributing pump for a multi-cylinders, internal combustion engine having a sinuously profiled cam member providing a plurality of discrete compound cam pumping stations, each comprising primary and auxiliary cams serially arranged and interconnected by an intermediate cam segment which coop

A fuel distributing pump for a multi-cylinders, internal combustion engine having a sinuously profiled cam member providing a plurality of discrete compound cam pumping stations, each comprising primary and auxiliary cams serially arranged and interconnected by an intermediate cam segment which cooperate with pumping plungers of a pump rotor to shape and vary the pulse waves of fuel delivered to the combustion chambers for varying engine operations. For low horsepower requirements, such as idle and light loads, only the primary cam with fast initial pumping rate and following low rate camming ramps or surfaces are utilized to shape the pulse wave with a fast beginning and a graduated end of injection for even and progressive fuel burn for reducing smoke and engine noise. For higher engine loads, the primary cam, the interconnecting cam segment and a large part of the auxiliary cam are employed for a fast beginning and end of injection for shaping and increasing the quantities of fuel in the pulse waves pumped for effective high horsepower operation with cleaner exhaust.

대표청구항 ▼

A fuel injection cam with a dwell and a rate shaping pumping station comprising a compound cam for contacting and displacing a member for the injection of shaped pulses of fuel into a combustion chamber of an internal combustion engine, said compound cam including a primary cam initially rising from

A fuel injection cam with a dwell and a rate shaping pumping station comprising a compound cam for contacting and displacing a member for the injection of shaped pulses of fuel into a combustion chamber of an internal combustion engine, said compound cam including a primary cam initially rising from a point on said dwell to a first point to establish a first pumping section on which a pulse of fuel can be started for establishing an initial fast beginning rate of fuel injection, said primary cam having an intermediate section with a lower pumping rate than said first pumping section and further having an ending section having a pumping rate less than the pumping rate of said intermediate section to provide points for establishing a soft rate end of injection for low load engine operations, said compound cam further including an auxiliary cam operatively connected to the primary cam to extend the injected pulses of fuel into the combustion chamber for high load engine operation.