JPH0158742U

JPH0158742U -

Info

Publication number: JPH0158742U
Application number: JP15498587U
Authority: JP
Priority date: 1987-10-09
Filing date: 1987-10-09
Publication date: 1989-04-12

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示すブロツク図、第
２図は同実施例で用いる始動増量制御回路の構成
例を示す回路図、第３図は第２図の回路の各部の
信号波形図、第４図は本考案の実施例により得ら
れるラツク位置の回転速度に対する制御特性の一
例を示す線図、第５図は従来のガバナ装置におけ
るラツク位置の回転速度に対する制御特性の一例
を示す線図である。１……デイーゼル機関、２……ラツク操作手段
、３……ラツク位置検出装置、４……回転速度検
出器、５……指示速度信号発生器、６……制御回
路、７……駆動回路、８……速度信号変換回路、
９……増量制御終了速度指示回路、１０……増量
用駆動信号発生回路。 Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing an example of the configuration of a starting increase control circuit used in the same embodiment, and Fig. 3 is a signal waveform diagram of each part of the circuit shown in Fig. 2. , FIG. 4 is a line diagram showing an example of the control characteristic for the rotation speed of the rack position obtained by the embodiment of the present invention, and FIG. 5 is a line diagram showing an example of the control characteristic for the rotation speed of the rack position in a conventional governor device. It is a diagram. DESCRIPTION OF SYMBOLS 1... Diesel engine, 2... Rack operation means, 3... Rack position detection device, 4... Rotation speed detector, 5... Indication speed signal generator, 6... Control circuit, 7... Drive circuit, 8...speed signal conversion circuit,
9...Increase control end speed instruction circuit, 10...Increase drive signal generation circuit.

Claims

[Claims for Utility Model Registration] A rack operating means for operating an injection amount adjusting rack of a fuel injection pump of a diesel engine, and a speed detection circuit that outputs a speed detection signal with a frequency proportional to the rotational speed of the diesel engine. the rack operating means is controlled to make the rotational speed match the commanded speed on the condition that the limit position of the rack toward the injection amount increasing side is limited to a set maximum injection amount position during steady state; a constant speed control circuit; and a starting quantity increase control circuit that controls the rack operating means so as to move the rack to a starting quantity increasing position which is further on the quantity increasing side from the steady state maximum injection quantity position when the diesel engine is started. In the electronic governor device for a diesel engine, the start increase control circuit generates the speed detection signal by superimposing an alternating current component that alternates in synchronization with the speed detection signal and a direct current component that changes in proportion to the rotation speed. a speed signal conversion circuit that converts into a speed detection voltage; an increase control end speed instruction circuit that outputs an increase control end speed instruction voltage; and an increase control drive signal that outputs an increase drive signal when the speed detection voltage is less than or equal to the increase control end speed instruction voltage. a drive circuit for generating an increase drive signal; and a drive circuit that drives the rack operating means so as to move the position of the rack to the starting increase position when the increase drive signal is applied, and the engine rotational speed is increased. The increase control end speed command voltage is set so that when the speed detection voltage reaches a rotational speed that ends the start increase control, the period during which the speed detection voltage is equal to or less than the increase control end speed command voltage is set to zero. Features of electronic governor device for diesel engines.