JPH0322179U

JPH0322179U -

Info

Publication number: JPH0322179U
Application number: JP8161489U
Authority: JP
Priority date: 1989-07-13
Filing date: 1989-07-13
Publication date: 1991-03-06

Description

[Brief explanation of drawings]

第１図はこの考案の電磁弁の断面図。第２図は
この考案の電磁弁の周波数に対する音圧特性図。
第３図は別の実施例の電磁弁の断面図。第４図は
別の実施例の可動鉄心、固定鉄心、弁座の配置を
示す。第５図はこの考案の電磁弁をアイドルスピ
ード制御弁として応用した電子制御内燃機関に概
略図。第６図は第５図におけるアイドルスピード
制御弁の制御ルーチンを示すフローチヤート。第
７図は第５図の制御回路によるデユーテイ比制御
作動を説明するタイミング図。第８図はこの考案
の実施例としてのアイドルスピード制御弁におけ
る流量の時間変化特性を模式的に説明する図。１０……電磁弁、１４……ソレノイド、１８…
…固定鉄心、２６……弁座、３０……可動鉄心、
３２……ダイヤフラム、１８−１，３０−１，２
６−１，３０−２……当たり面の組、３４……リ
ターンスプリング、５０……エアクリーナ、５２
……スロツトル弁、５４……サージタンク、５６
……燃料インジエクタ、７０……制御回路、７２
……カウンタ、７４……フリツプフロツプ回路、
７６……アイドルスイツチ、７７……水温センサ
、７８……回転数センサ。 FIG. 1 is a sectional view of the solenoid valve of this invention. Figure 2 is a diagram of sound pressure characteristics versus frequency of the solenoid valve of this invention.
FIG. 3 is a sectional view of a solenoid valve according to another embodiment. FIG. 4 shows the arrangement of a movable core, a fixed core, and a valve seat in another embodiment. Figure 5 is a schematic diagram of an electronically controlled internal combustion engine in which the solenoid valve of this invention is applied as an idle speed control valve. FIG. 6 is a flowchart showing a control routine for the idle speed control valve in FIG. FIG. 7 is a timing diagram illustrating the duty ratio control operation by the control circuit of FIG. 5. FIG. 8 is a diagram schematically explaining the temporal change characteristics of the flow rate in the idle speed control valve as an embodiment of the invention. 10... Solenoid valve, 14... Solenoid, 18...
... Fixed iron core, 26 ... Valve seat, 30 ... Movable iron core,
32...Diaphragm, 18-1, 30-1, 2
6-1, 30-2... Set of contact surfaces, 34... Return spring, 50... Air cleaner, 52
... Throttle valve, 54 ... Surge tank, 56
... Fuel injector, 70 ... Control circuit, 72
... Counter, 74 ... Flip-flop circuit,
76... Idle switch, 77... Water temperature sensor, 78... Rotation speed sensor.

Claims

[Scope of utility model registration request]

The movable body is provided with an electromagnetic drive mechanism, a movable body disposed between a stopper member and a valve seat installed opposite to each other, and a return spring that urges the movable body to a normal position. The body and the valve seat each have a pair of opposing first and second surfaces, and are biased by a spring so that the opposing surfaces of one of the first and second pairs are in contact in a normal state. In a solenoid valve in which the movable body is driven against a return spring so that opposing surfaces of the other of the first and second sets come into contact with each other in a direction away from the normal position by energizing the electromagnetic mechanism. , a solenoid valve characterized in that opposing surfaces in at least one of the first and second sets are arranged so as to be inclined relative to each other.