JPH0484734U

JPH0484734U -

Info

Publication number: JPH0484734U
Application number: JP12797790U
Authority: JP
Priority date: 1990-11-30
Filing date: 1990-11-30
Publication date: 1992-07-23
Anticipated expiration: 2005-11-30
Also published as: JPH088256Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の側断面概要図、第
２図は従来例を示す側断面概要図である。１はコントロールラツク、２はアクチユエータ
、４は主機操縦レバー、５は主軸、８はフライウ
エイト、９はロツド、１１はコントロールバルブ
スプール、１２は圧力源、１３は第一室、１４は
供給流路、１５は絞り装置、１７は作動流体室、
１８は流路、１９はパイロツトバルブスプール、
２０は第二室、２１，２２はバイパス流路、２８
は開閉弁、２９は駆動信号、３０は制御装置を示
す。 FIG. 1 is a schematic side sectional view of an embodiment of the present invention, and FIG. 2 is a schematic side sectional view showing a conventional example. 1 is a control rack, 2 is an actuator, 4 is a main engine control lever, 5 is a main shaft, 8 is a fly weight, 9 is a rod, 11 is a control valve spool, 12 is a pressure source, 13 is a first chamber, 14 is a supply channel , 15 is a throttle device, 17 is a working fluid chamber,
18 is a flow path, 19 is a pilot valve spool,
20 is a second chamber, 21 and 22 are bypass channels, 28
29 is an on-off valve, 29 is a drive signal, and 30 is a control device.

Claims

[Claims for Utility Model Registration] An actuator that drives a control rack for controlling the fuel injection amount of an injection pump of a diesel engine; a main shaft in which a chamber is formed; a pressure source connected to a first chamber of the main shaft via a supply flow path; a flow path communicating between the working fluid chamber of the actuator and the first chamber; a bypass flow path that branches from the main shaft side of the flow path from the throttle device and is connected to the second chamber; and a bypass flow path that branches from the actuator side of the flow path from the throttle device and connects to the second chamber. A control valve spool that is slidably inserted into the main shaft in the axial direction and is located in the first chamber and a pilot valve spool that is located in the second chamber are integrally formed. and a rod, which is arranged to be rotatable integrally with the main shaft and to be openable and closable by centrifugal force during rotation, and when a small rotation decreases, the supply flow path and the flow path are communicated with each other by the control valve spool in proportion to the amount of rotation decrease. The rod is moved so that both bypass passages are kept blocked by the pilot valve spool, and when the rotation increases by a small amount, the working fluid in the passage is discharged by the control valve spool in proportion to the amount of increase in rotation. The rod is moved so that the supply flow path and the flow path are communicated by the control valve spool and both the bypass flow paths are kept blocked by the pilot valve spool. The rod is moved so that the bypass passage is communicated with the pilot valve spool, and when the rotation rapidly increases, the working fluid in the passage is discharged by the control valve spool, and both bypass passages are communicated with the pilot valve spool. A mechanical governor for a diesel engine including a flyweight capable of moving the rod so as to communicate with the rod, the mechanical governor comprising: an on-off valve provided in either one of the bypass passages, and a rotation control of the diesel engine. determining whether the main engine control lever is being operated, and closing the on-off valve when the main engine control lever is not being operated;
A mechanical governor for a diesel engine, further comprising a control device that outputs a drive signal to the on-off valve to open the on-off valve when a main engine control lever is operated.