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公开(公告)号：US4535742A
公开(公告)日：1985-08-20
申请号：US595189
申请日：1984-03-30
申请人： Helmut Laufer , Helmut Pfeifle , Max Straubel
发明人： Helmut Laufer , Helmut Pfeifle , Max Straubel
CPC分类号： F02M41/123 , F02M41/128 , F02M59/366 , F02B2275/14 , Y02T10/123
摘要： A fuel injection pump for internal combustion engines, in which beyond a predetermined remnant stroke during the supply stroke of the pump piston a relief conduit is opened via a first control edge and the remaining fuel pumped by the pump piston is pumped into a reservoir connected there. During the subsequent intake stroke, the diverted fuel is pumped back into the pump work chamber of the pump piston, until the first control edge again closes the relief conduit. During the subsequent intake stroke of the pump piston, in particular at the bottom dead center position of the pump piston, the relief conduit to the reservoir is once again opened by a second control edge, and then a complete relief of the reservoir is attained. It is during this phase that the metering of the fuel to be injected during the next supply stroke of the pump piston also takes place, via a magnetic valve. With an apparatus of this kind, it is advantageous that the fuel quantity per supply stroke of the pump piston that is actually to be injected can be metered exactly by means of a magnetic valve under pressure conditions that remain constant despite variable opening times.
摘要翻译： 一种用于内燃机的燃料喷射泵，其中在泵活塞的供给冲程期间超过预定的剩余行程，释放管经由第一控制边缘打开，并且由泵活塞泵送的剩余燃料被泵入与其连接的储存器 。 在随后的进气冲程期间，转向的燃料被泵送回泵活塞的泵工作室，直到第一控制边缘再次关闭释放管道。 在泵活塞的随后的进气冲程期间，特别是在泵活塞的下死点位置，通过第二控制边缘再次打开到储油器的排放管，然后获得储存器的完全释放。 正是在这个阶段，在泵活塞的下一次供给冲程期间，通过电磁阀进行喷射的燃料计量。 使用这种装置，有利的是，实际上要注射的泵活塞的每供应冲程的燃料量可以通过电磁阀精确地在压力条件下计量，压力条件尽管可变的打开时间保持恒定。
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公开(公告)号：US4903666A
公开(公告)日：1990-02-27
申请号：US281144
申请日：1988-12-06
CPC分类号： F02M57/02 , F02M55/04 , F02M59/366 , F02M59/462 , F02B2275/14 , Y02T10/123
摘要： A fuel injection device having a pump piston which during the supply stroke pumps fuel from a pump work chamber into an injection line which leads to a fuel injection valve. Directly adjacent to the branching off of the injection line from the pump work chamber, at the diameter of the injection line, a valve seat is provided, at which the injection line then merges with a chamber into which a pressure valve closing member plunges. The valve closing member is tightly guided in a guide bore, loaded by a valve spring, and in the chamber has a pressure shoulder adjoining the sealing surface that cooperates with the valve seat. The rear side of the pressure valve closing member communicates with a continuously open relief line. Because of this construction, the pressure valve closing member operates as an equal-pressure valve and simultaneously as a deflecting piston as well, with the aid of which a pressure rise in the pump work chamber is built up in a retarded manner until such time as the pressure valve closing member comes to rest on a stop. A pressure rise of this type is particularly advantageous in connection with control of the injection phase by means of a magnetic valve subjected to the high pressure.
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3.发明授权Fuel injection apparatus for definite pilot injection and main injection in internal combustion engines 失效燃油喷射装置，用于在内燃机中进行明确的先导喷射和主喷射
公开(公告)号：US4590903A
公开(公告)日：1986-05-27
申请号：US644086
申请日：1984-08-24
CPC分类号： F02M45/04
摘要： A fuel injection apparatus for definite pilot and main injection in internal combustion engines. A hydraulic auxiliary pump is supplied via a pressure line with fuel from a high-pressure injection pump, which fuel reaches a main injection nozzle and simultaneously drives the hydraulic auxiliary pump. The hydraulic auxiliary pump contains a differential piston comprising a reservoir piston and a pilot injection piston with different diameters and with a spring prestressing such that between the end of supply of the pilot injection and the onset of supply of the main injection, an injection-free spacing stroke (DH) which can be predetermined by means of mechanical stops results, during which spacing stroke (DH) the reservoir piston by retracting further, receives the supply quantity which is pumped during the injection interval by the high-pressure injection pump.
摘要翻译： 一种燃油喷射装置，用于内燃机中的先导和主喷射。 液压辅助泵通过压力管路与来自高压喷射泵的燃料供应，该燃料到达主喷射喷嘴并同时驱动液压辅助泵。 液压辅助泵包含差动活塞，其包括具有不同直径并具有弹簧预应力的储液器活塞和引燃喷射活塞，使得在引燃喷射的供给结束与主喷射的供应开始之间， 间歇行程（DH）可以通过机械停止结果预先确定，在此期间，储存器活塞通过进一步收回的间隔冲程（DH）接收高压注射泵在喷射间隔期间泵送的供给量。
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公开(公告)号：US4750462A
公开(公告)日：1988-06-14
申请号：US873002
申请日：1986-06-11
申请人： Walter Egler , Jean Leblanc , Helmut Pfeifle , Jean Pigeroulet , Francois Rossignol , Dietrich Trachte
发明人： Walter Egler , Jean Leblanc , Helmut Pfeifle , Jean Pigeroulet , Francois Rossignol , Dietrich Trachte
CPC分类号： F02M55/04 , F02M57/02 , F02M59/462 , F02B2275/14 , Y02T10/123
摘要： A fuel injection apparatus which the termination of the effective pump supply stroke is effected by exposing a relief conduit with the aid of a valve having for instance a control edge, whereupon a highly pressurized fuel flows out via the relief conduit and is directed into a pressure chamber defined by a rear face of a pressure valve closing member. The pressure valve closing member is located in a connection with a fuel injection line that leads from the pump work chamber to the fuel injection valve and is acted upon by a valve spring to effect closing of this injection line. The impact of fuel that reaches the pressure chamber via the releif conduit reinforces a fast closure of the pressure valve closing member at the end of injection, which leads to an abrupt termination of an injection cycle. In addition, or altenatively, the fuel injection valve closing member can also be acted upon by the impact of fuel diversion.
摘要翻译： 通过借助于具有例如控制边缘的阀暴露释放管道来实现有效泵供给冲程的终止的燃料喷射装置，于是高压燃料经由泄压管流出并被引导到压力 室由压力阀关闭构件的后表面限定。 压力阀关闭构件位于与从泵工作室引导到燃料喷射阀的燃料喷射管的连接处，并且由阀弹簧作用，以实现该注入管线的闭合。 通过相关管道到达压力室的燃料的影响加强了注射结束时压力阀关闭件的快速关闭，这导致喷射循环的突然终止。 此外，或者说，燃油喷射阀关闭部件也可以通过燃料分流的影响而起作用。
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公开(公告)号：US4526149A
公开(公告)日：1985-07-02
申请号：US585042
申请日：1984-03-01
申请人： Walter Hafele , Helmut Pfeifle , Reinhard Schwartz , Max Straubel
发明人： Walter Hafele , Helmut Pfeifle , Reinhard Schwartz , Max Straubel
CPC分类号： F02M59/366 , F02M59/20 , F02M59/26 , F02M59/44
摘要： The fuel injection quantity of a fuel injection apparatus provided with a fuel injection pump is electrically regulated by means of the opening duration of a metering valve. Additionally, a shift in the instant of supply onset controlled in accordance with operating characteristics is attained by means of a change in the return-flow fuel quantity, which is diverted into a refill reservoir and then refilled completely into the pump work chamber by the beginning of the next subsequent injection stroke. Serving as the sole connection between the refill reservoir and a pump work chamber is an overflow conduit, the overflow opening of which, located at the discharge location into the pump work chamber, is opened by two control locations on the pump piston at the end of supply and once again shortly before bottom dead center. The two control locations are embodied by an oblique control edge on the pump piston that determines the end of supply and by a horizontal, end-face control edge, with the horizontal control edge assuring that shortly before bottom dead center any remnant quantity of the return-flow fuel still remaining in the refill reservoir is refilled back into the pump work chamber.
摘要翻译： 具有燃料喷射泵的燃料喷射装置的燃料喷射量通过计量阀的打开持续时间进行电气调节。 此外，通过回流量燃料量的变化，可以实现根据操作特性控制的供应起始瞬间的变化，该返回流量燃料量被转移到再填充容器中，然后由开始完全重新填充到泵工作室中 的下一个后续注射冲程。 作为补充储存器和泵工作室之间的唯一连接的是溢流管道，其溢流开口位于泵工作室的排放位置处，由泵活塞末端的两个控制位置打开 在下死点之前再次供应。 两个控制位置通过泵活塞上的倾斜控制边缘来实现，该倾斜控制边缘确定供应的末端和水平的端面控制边缘，水平控制边缘确保在下止点之前不久的任何残余量的返回 仍然保留在补充储存器中的流动燃料被重新填充到泵工作室中。
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公开(公告)号：US4805580A
公开(公告)日：1989-02-21
申请号：US870468
申请日：1986-06-04
CPC分类号： F02M57/02 , F02M55/04 , F02M59/366 , F02M59/462 , F02B2275/14 , Y02T10/123
摘要： A fuel injection device having a pump piston which during the supply stroke pumps fuel from a pump work chamber into an injection line which leads to a fuel injection valve. Directly adjacent to the branching off of the injection line from the pump work chamber, at the diameter of the injection line, a valve seat is provided, at which the injection line then merges with a chamber into which a pressure valve closing member plunges. The valve closing member is tightly guided in a guide bore, loaded by a valve spring, and in the chamber has a pressure shoulder adjoining the sealing surface that cooperates with the valve seat. The rear side of the pressure valve closing member communicates with a continuously open relief line. Because of this construction, the pressure valve closing member operates as an equal-pressure valve and simultaneously as a deflecting piston as well, with the aid of which a pressure rise in the pump work chamber is built up in a retarded manner until such time as the pressure valve closing member comes to rest on a stop. A pressure rise of this type is particularly advantageous in connection with control of the injection phase by means of a magnetic valve subjected to the high pressure.
摘要翻译： 具有泵活塞的燃料喷射装置，其在供给冲程期间将来自泵工作室的燃料泵送到通向燃料喷射阀的喷射管线。 在喷射管直径处，直接与喷射管路分离出的离开泵入口管线的直径相同，设置有一个阀座，在该阀座处，注射管线与压力阀关闭件所在的腔室合并。 阀关闭构件被紧密地引导在由阀弹簧加载的引导孔中，并且在腔室中具有邻接与阀座配合的密封表面的压力肩部。 压力阀关闭构件的后侧与连续打开的浮雕线连通。 由于这种结构，压力阀关闭部件作为等压阀工作，同时作为偏转活塞，借助于此，泵工作室中的压力上升以延迟的方式被建立，直到 压力阀关闭件在停止时停止。 这种类型的压力上升与通过经受高压的电磁阀控制喷射相相关是特别有利的。
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公开(公告)号：US4526150A
公开(公告)日：1985-07-02
申请号：US585057
申请日：1984-03-01
CPC分类号： F02M59/26 , F02M59/366 , F02M2200/04
摘要： The fuel injection quantity of a fuel injection apparatus provided with a fuel injection pump is electrically regulated by means of the opening duration of a metering valve. Additionally, a shift in the instant of supply onset controlled in accordance with operating characteristics is attained by means of a change in the return-flow fuel quantity, which is diverted into a refill reservoir and then refilled completely into the pump work chamber by the beginning of the next subsequent injection stroke. Serving as the sole connection between the refill reservoir and a pump work chamber is an overflow conduit, which is opened by two control locations on the pump piston at the end of a supply and shortly prior to the bottom dead center. Both the pump cylinder with the pressure valve and the refill reservoir and the metering valve are inserted in a leak-fuel-proof manner in a cylinder head of the pump housing, which is embodied in two parts. The decreased idle volume, the reduction of possible leakage points, and the complete refilling of the return-flow fuel quantity assure that the fuel injection quantity is determined unequivocally by the opening duration of the metering valves.
摘要翻译： 具有燃料喷射泵的燃料喷射装置的燃料喷射量通过计量阀的打开持续时间进行电气调节。 此外，通过回流量燃料量的变化，可以实现根据操作特性控制的供应起始瞬间的变化，该返回流量燃料量被转移到再填充容器中，然后由开始完全重新填充到泵工作室中 的下一个后续注射冲程。 作为补充储存器和泵工作室之间的唯一连接件，是溢流管道，其在供给末端和下死点之前不久在泵活塞上的两个控制位置打开。 具有压力阀的泵缸和补充储存器和计量阀都以防泄漏的方式插入泵壳体的气缸盖中，其体现在两部分中。 减少的空闲体积，可能的泄漏点的减少以及回流燃料量的完全重新填充确保燃料喷射量由计量阀的打开持续时间明确地确定。
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