公开(公告)号：US3704963A

公开(公告)日：1972-12-05

申请号：US3704963D

申请日：1971-02-03

Applicant: STANADYNE INC

Inventor： BAXTER LEONARD N

IPC: F02M41/14 ,  F02M63/02 ,  F04B49/00 ,  F04B13/02

CPC classification number: F02M41/1427 ,  F02M63/02 ,  F02M2041/145 ,  F02M2041/1472 ,  F02M2041/1477

Abstract: A fuel pump including a charge pump for delivering discrete pulses of high pressure fuel sequentially to the several cylinders of an engine has an automatic system, effective at low loads, to improve combustion efficiency and decrease air pollution. A reciprocable shuttle piston is disposed between the high pressure generating chamber of the charge pump and a second chamber which is selectively connected to a supply conduit past a by-pass restriction provided by the metering valve. The metering valve passes a measured charge of fuel to the pressure chamber prior to each pumping stroke, and at low engine loads, connects the second chamber with the supply conduit during alternate pumping strokes so that the shuttle piston is free to move to increase the volume of the pressure chamber to store the charge of fuel, prevent pressure build-up and delivery of the charge to the engine. Prior to the next pumping stroke, another charge is delivered to the pressure chamber, and continued communication of the second chamber with the supply conduit moves the shuttle piston to reduce the volume of the pressure chamber an amount equal to the stored charge so that a double charge of fuel is pressurized and delivered to the engine. As engine load increases, and the metering valve opens to increase the measured charge to the pressure chamber, the by-pass restriction becomes smaller and the charges of fuel delivered during successive pumping strokes become equal when the by-pass restriction is closed. In a variant, the second chamber for the shuttle is selectively connected to a supply conduit by a passage which by-passes the metering valve so that the pump may be used for an engine having one-half the number of cylinders for which the pump is designed. A valve in the by-pass passage is closed when the pump is used for an engine having the designed number of cylinders and opened when used with an engine having one-half that number.

Abstract translation: 包括用于将高压燃料的离散脉冲顺序地输送到发动机的几个气缸的电荷泵的燃料泵具有在低负载下有效的自动系统，以提高燃烧效率并减少空气污染。 可往复运动的活塞被设置在电荷泵的高压发生室和第二腔室之间，第二腔室通过计量阀提供的旁路限制器选择性地连接到供应导管。 计量阀在每个泵送冲程之前将测量的燃料量传递到压力室，并且在低发动机负荷下，在交替泵送冲程期间将第二腔室与供应管道连接，使得梭式活塞自由移动以增加体积 的压力室以存储燃料的费用，防止压力积聚和将电荷输送到发动机。 在下一个泵送冲程之前，另一个进料被输送到压力室，并且第二腔室与供应管道的持续连通使梭式活塞移动，以使压力室的体积减小等于储存的电荷的量，使得双重 燃料的加注被加压并输送到发动机。 随着发动机负荷增加，并且计量阀打开以将测量的电荷增加到压力室，旁路限制变得更小，并且当旁路限制关闭时，连续泵送冲程期间输送的燃料的电荷变得相等。

公开(公告)号：US3883270A

公开(公告)日：1975-05-13

申请号：US45357274

申请日：1974-03-22

Applicant: STANADYNE INC

Inventor： BAXTER LEONARD N

IPC: F02M41/08 ,  F02M41/14 ,  F04B49/12 ,  F04B49/00 ,  F04B17/02

CPC classification number: F02M41/1411 ,  F04B49/12 ,  Y02P80/158

Abstract: The ends of rollers interposed between a cylindrical cam ring and the radial pump plungers of a rotary distributor pump engage a pair of conical rings which move axially toward each other to adjust the outward movement of the plungers and mechanically regulate the amount of fuel injected per pumping stroke.

Abstract translation: 插入在圆柱形凸轮环和旋转分配器泵的径向泵柱塞之间的辊的端部接合一对锥形环，其相对于彼此轴向移动以调节柱塞的向外运动并机械地调节每次泵送喷射的燃料量 行程。