| 摘要 |
A fuel injection system, comprising a low pressure fuel delivery pump with constant output in fluid communication with a low pressure fuel line; said fuel line connected to an electronic controlled fuel pressure regulator and fuel pressure sensor;an electronic control module to monitor and adjust fuel pressure in said low pressure fuel line to a desired fuel delivery pressure and supply fuel to an injector at a feed-back controlled pressure; and at least one injector in fluid communication with a cylinder in an internal combustion engine; said injector having an injector body equipped with a fuel metering orifice to supply fuel from the fuel line to a fuel cumulative chamber within the injector, a reciprocating plunger within said injector; said plunger equipped with a plunger; said plunger passage opening at one end to said fuel cumulative chamber, and, upon reciprocation of the plunger within the injector, opening at its other end to said metering orifice; said injector further equipped with an electronically controlled solenoid control valve to operate a fuel needle within said injector to inflict fuel into said engine cylinder; and a camshaft at least one cam lobe to drive said injector plungers; said cam lobe having a base circle section to meter fuel for injection; a rising section for pressurizing fuel in the cumulative chamber; a zero velocity section of sufficient length to accommodate a variety of fuel injection timing sequences, and a falling section; said camshaft interactive with a rocker arm to drive said plunger and inject fuel into said engine cylinder.
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