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    • 3. 发明申请
    • DIRECT INJECTION FUEL SYSTEM
    • 直接注射燃料系统
    • WO1978000007A1
    • 1978-12-07
    • PCT/US1978000009
    • 1978-06-01
    • PFEIFFER W M
    • F02D11/06
    • F02M47/027F02B2275/14F02M63/0225Y02T10/123
    • Injection pressure generated by a suitable flow source (16) and a pressure-flow regulator (28) is carried by a common rail or manifold (20) to each injector valve of an engine. The valves (22) are of the closed differential needle, hydraulic-operated type, opening and closing for the injection period by virtue of hydraulic pressure imbalance and balance exerted on the effective piston areas of the valve needle. Balance conditions are controlled by fuel flow through ports and orifices (72, 74, 78, 102) of electric solenoid-operated sliding spool valves (52) by an engine-driven timer device (38, 40) which controls the start and end of the injection period. Controlled by-pass flow from the spool valves (52) may be collected by a low pressure manifold for return to the reservoir along with the overflow from a high pressure manifold (20).
    • 由合适的流动源(16)和压力流量调节器(28)产生的注射压力由共轨或歧管(20)承载到发动机的每个喷射阀上。 阀(22)由于液压不平衡和作用在阀针的有效活塞区域上的平衡而由注射期间的闭合差速针,液压操作型,打开和关闭。 平衡条件由通过电动螺线管操作的滑动滑阀(52)的端口和孔口(72,74,78,102)的燃料流量控制,发动机驱动的定时装置(38,40)控制起动和停止 注射期。 来自滑阀(52)的受控旁通流可以由低压歧管收集,以便与高压歧管(20)的溢流一起返回到储存器。