公开(公告)号：WO1988005130A1

公开(公告)日：1988-07-14

申请号：PCT/DE1987000569

申请日：1987-12-04

Applicant: ROBERT BOSCH GMBH ,  KONRATH, Karl ,  KRIEGER, Klaus ,  SCHMIDT, Hermann ,  LUTZ, Rolf ,  OBERL, Johann

Inventor： ROBERT BOSCH GMBH

IPC: F02M59/46

CPC classification number: F02M59/462 ,  B23C3/00

Abstract: A process for manufacturing the movable element (117) of a pressure valve for fuel injection pumps by material removal. The movable element has a closing cone (123), a balance piston (128) an several fuel guiding recesses (125) extending in the axial direction of a guiding shaft (118). Several such elements (117) are simultaneously produced from a previously hardened bar, the rotation-symmetric notches (131) and openings being effected in a known manner by turning tools, whereas the recesses (125) are for example produced by rotating tools, in particular grinding tools, transversely moved with respect to the axis of the bar.

公开(公告)号：WO1991007586A1

公开(公告)日：1991-05-30

申请号：PCT/DE1990000802

申请日：1990-10-24

Applicant: ROBERT BOSCH GMBH ,  OBERL, Johann ,  SCHMIDT, Hermann ,  LUTZ, Rolf

Inventor： ROBERT BOSCH GMBH

IPC: F02M59/46

CPC classification number: F02M59/462 ,  F01M1/16 ,  F02M2200/04 ,  Y10T137/7867 ,  Y10T137/7939

Abstract: Proposed is a pressure valve fitted in the feed line (7, 7') leading from a fuel-injection pump to a fuel-injection valve (8). The pressure valve has a closure element (121) which opens in the fuel-feed direction and which has a return-flow shoulder (135). To ensure uniform injection, in particular at a given load over the engine-speed range, the rate of increase of the cross-sectional area of the flow passage defined by the valve closure element (121) is controlled by virtue of the fact that, immediately adjacent to the return-flow shoulder (135), is a control element (131) with three recesses (138) round its perimeter. These recesses are bounded by the through-channel (120) in which the valve-closure element (121) is guided, and have the same, given, opening area, the sum of the opening areas being of the same order of magnitude as the cross-sectional area of the feed line. As the stroke movement progresses, the rim (139) bounding the recesses (138) on the flow-return shoulder (135) and the rim (122) at the outlet of the through-channel (120) together leave in the zone of the recesses (138) a complete passage which is never larger in cross-section area than the cross-sectional area of one recess.

Abstract translation: 提出了安装在从燃料喷射泵引导到燃料喷射阀（8）的供给管线（7,7'）中的压力阀。 压力阀具有在燃料供给方向上开口并具有回流肩部（135）的闭合元件（121）。 为了确保均匀喷射，特别是在发动机速度范围内的给定负载下，由阀闭合元件（121）限定的流动通道的横截面积的增加率由以下事实控制： 紧邻回流台肩（135）的是具有围绕其周边的三个凹部（138）的控制元件（131）。 这些凹部由导阀闭合元件（121）的通道（120）限定，并且具有相同的给定开口面积，开口面积的总和与其相同数量级的总和 进料管线的横截面积。 当行程运动进行时，限定在回流台肩（135）上的凹部（138）和通道（120）的出口处的轮缘（122）的轮缘（139）一起离开 凹槽（138）是一个完整的通道，横截面积不应大于一个凹槽的横截面面积。

公开(公告)号：WO1988005129A1

公开(公告)日：1988-07-14

申请号：PCT/DE1987000568

申请日：1987-12-04

Applicant: ROBERT BOSCH GMBH ,  KONRATH, Karl ,  KRIEGER, Klaus ,  SCHMIDT, Hermann ,  LUTZ, Rolf ,  OBERL, Johann

Inventor： ROBERT BOSCH GMBH

IPC: F02M59/46

CPC classification number: F02M59/462

Abstract: A pressure relief valve (16) for fuel injection pumps has a relief piston (28) that plunges into a guiding bore (19) of a valve support (21) in order to relieve the pressure in the pressure duct. The valve element (17) has recesses (25) upstream or downstream of the relief piston (28), available to the fuel duct when the valve is open and arranged in a shaft (18) that guides the movable valve element (17) in the guiding bore (19). The lands (27) of the shaft (18) that delimit the recesses (25) merge directly into the relief piston (28), so that the front walls of the recesses (25) form at the same time the front wall of the relief piston (28).