JPS59121437U - Fuel injection pump advance angle adjustment device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of this invention.
Fig. 1 is a schematic diagram of the overall configuration, Fig. 2 is a plan view showing the phase change mechanism, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 is a schematic configuration diagram showing another embodiment. It is. 1... Phase change mechanism, 2... Actuator, 3...
・Injection pump rotation shaft, 4...Engine side drive shaft, 1
6... Cylinder, 17... Piston, 20... Adjustment spring, 21.22... First and second communication pipe (supply path), 23... Switching valve, 24... Feed Oil pipe (supply path),
33...Controller, 39.40...Switch. Fig. 2 16 ■ -1 1-19-i” “L, ”LL ■ Fig. 4 72 No. 1373 IO”7 Amendment 1985.5゜4 The scope of claims for utility model registration is amended as follows. . O Utility Model Registration Claim Scope A phase change mechanism that changes the phase angle between the rotation shaft of the injection pump and the engine side drive shaft from an injection delay state to a state moved in the advance direction, and a piston in the cylinder that adjusts the advance angle. an actuator for driving the phase change mechanism that is always held in a normal position by an adjustment spring and in this state maintains the phase change mechanism in an optimal starting injection state; and a supply that supplies oil into the cylinder of this actuator. road and
a switching valve that is inserted into the supply path and switches between a communication state and a cutoff state between the inside of the cylinder and the supply path;
A controller that performs switching control of the switching valve and maintains communication between the supply passage and the inside of the cylinder during engine operation, and a switch that temporarily cuts off the control signal output from the controller to the switching valve at the time of startup. An advance angle adjustment device for a fuel injection pump, characterized by comprising:

Claims (1)

[Scope of utility model registration request] A phase change mechanism that changes the phase angle between the rotation axis of the injection pump and the engine drive shaft from an injection return state to a state moved in the advance direction, and a piston in the cylinder that is constantly adjusted by an adjustment spring for adjusting the advance angle. is an actuator for driving the phase change mechanism that is held in a normal position and holds the phase change mechanism in an injection delayed state in this state; a supply path that supplies oil into the cylinder of this actuator; A switching valve is inserted and configured to switch between a communication state and a cutoff state between the inside of the cylinder and the supply path, and switching control of the switching valve is performed to maintain the communication state between the supply path and the inside of the cylinder during engine operation. 1. An advance angle adjustment device for a fuel injection pump, comprising: a controller for controlling the switching valve; and a switch for temporarily cutting off a control signal outputted from the controller to the switching valve at the time of starting.