JPH0349342U

JPH0349342U -

Info

Publication number: JPH0349342U
Application number: JP10997989U
Authority: JP
Priority date: 1989-09-20
Filing date: 1989-09-20
Publication date: 1991-05-14

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係るスロツトル調
整装置のモータの正逆転回路、第２図はモータに
よるスロツトル調整の構造を示す要部平面図、第
３図はエンジンの回転数に対するモータの制御の
関係を示すグラフ、第４図は変形例のスロツトル
調整装置の平面図、第５図は別の変形例のスロツ
トル調整装置の平面図、第６図は同要部斜視図、
第７図は従来の草刈り機用ガソリンエンジンの要
部斜視図である。また図面中の主要な部分の名称はつぎの通りで
ある。１５……エンジン、１６……キヤブレタ、
１８……スロツトル軸、２１……モータ、２５…
…バツテリ、２６〜２９……トランジスタ、４１
……コンパレータ（高速側）、４２……コンパレ
ータ（低速側）、４８……ピツクアツプコイル、
４９……コンデンサ、５０……抵抗、５１……ダ
イオード、５２……コンデンサ、５６……スロツ
トルレバー。 Fig. 1 is a forward/reverse circuit of a motor in a throttle adjustment device according to an embodiment of the present invention, Fig. 2 is a plan view of main parts showing the structure of throttle adjustment using a motor, and Fig. 3 is a diagram showing the relationship between the motor and the engine speed. Graph showing control relationships, FIG. 4 is a plan view of a modified throttle adjusting device, FIG. 5 is a plan view of another modified throttle adjusting device, and FIG. 6 is a perspective view of the same essential parts.
FIG. 7 is a perspective view of a main part of a conventional gasoline engine for a lawn mower. The names of the main parts in the drawings are as follows. 15...Engine, 16...Carburetor,
18... Throttle axis, 21... Motor, 25...
...Battery, 26-29...Transistor, 41
... Comparator (high speed side), 42 ... Comparator (low speed side), 48 ... Pick up coil,
49... Capacitor, 50... Resistor, 51... Diode, 52... Capacitor, 56... Throttle lever.

Claims

[Scope of utility model registration request]

In a device that controls the engine speed by adjusting the opening degree of a throttle valve of a carburetor, the throttle shaft for opening and closing the throttle valve is interlocked with a motor, and the motor is connected to a forward/reverse rotation circuit. When the engine speed becomes lower than the low-speed reference speed, the motor is rotated forward to increase the opening of the throttle valve, and when the engine speed becomes higher than the high-speed reference speed, A throttle adjustment device for a gasoline engine, characterized in that the opening degree of a throttle valve is reduced by rotating a motor in reverse.