JPH0214448U

JPH0214448U -

Info

Publication number: JPH0214448U
Application number: JP9189988U
Authority: JP
Priority date: 1988-07-13
Filing date: 1988-07-13
Publication date: 1990-01-30

Description

[Brief explanation of drawings]

第１図は本考案の自動始動用補助気化器の実施
例を示す図、第２図は正特性サーミスタへの通電
によつて加熱されるワツクスサーモを使用した自
動始動用補助気化器の従来構成の例を示す図、第
３図はプランジヤがエンジンの吸気負圧によつて
動作し、始動用燃料通路に導入される空気流量が
ワツクスサーモで制御される特開昭５５―３５１
８３号開示の始動用補助気化器の構成を示す図で
ある。符号の説明：１……エンジン、２……主気化器
の主吸気通路、３……絞り弁、４……始動用空気
通路、５……始動用燃料通路、６……浮子室、７
……シリンダ、８……始動用混合気通路、９……
正特性サーミスタ、１０……ワツクスサーモ、１
１……作動桿、１２……コイルスプリング、１３
……プランジヤホルダ、１４……プランジヤ、１
５……始動用燃料計量ジエツト、２０……始動用
副空気通路、２２……空気流量計量ジエツト、２
３……開閉弁、２４……負圧装置、２５……負圧
装置の筐体、２６……ダイアフラム、２７……大
気圧室、２８……負圧室、２９……弁ばね、３０
……逆止弁。 Fig. 1 shows an embodiment of the auxiliary carburetor for automatic starting of the present invention, and Fig. 2 shows the conventional configuration of the auxiliary carburetor for automatic starting using a wax thermostat that is heated by energizing a positive temperature coefficient thermistor. A diagram showing an example, Figure 3, is JP-A-55-351 in which the plunger is operated by the engine's intake negative pressure, and the flow rate of air introduced into the starting fuel passage is controlled by a wax thermometer.
It is a figure which shows the structure of the starting auxiliary carburetor disclosed in No. 83. Explanation of symbols: 1... Engine, 2... Main intake passage of main carburetor, 3... Throttle valve, 4... Starting air passage, 5... Starting fuel passage, 6... Float chamber, 7
...Cylinder, 8...Starting mixture passage, 9...
Positive characteristic thermistor, 10...Wax thermometer, 1
1... Operating rod, 12... Coil spring, 13
... Plunger holder, 14 ... Plunger, 1
5...Fuel metering jet for starting, 20...Sub-air passage for starting, 22...Air flow rate metering jet, 2
3... Opening/closing valve, 24... Negative pressure device, 25... Negative pressure device casing, 26... Diaphragm, 27... Atmospheric pressure chamber, 28... Negative pressure chamber, 29... Valve spring, 30
……non-return valve.

Claims

[Scope of utility model registration request]

This is an auxiliary starting carburetor that increases the amount of fuel when starting the engine 1, and includes a starting fuel passage 5 that leads fuel from the float chamber 6 of the main carburetor that supplies air-fuel mixture to the engine 1, and a starting fuel passage 5 that introduces atmospheric air. A plunger 14 is disposed in a cylinder 7 in which a starting air mixture passage 4 and a starting air mixture passage 8 for guiding the formed starting air mixture to the main intake passage 2 downstream of the throttle valve 3 of the main carburetor are opened. , heat sensitive part 1 of wax thermometer 10
The plunger 14 follows the operating rod 11 of the wax thermostat 10, which is activated by energizing the positive temperature coefficient thermistor 9 disposed in contact with the end face of the engine 1, thereby controlling the supply of the starting air-fuel mixture to the engine 1. In the starting fuel passage 5, an auxiliary starting air passage 20 for introducing atmospheric air into the starting fuel passage 5 is opened;
An air flow metering jet 22 and an on-off valve 23 that conducts and shuts off the starting auxiliary air passage 20 are disposed in the starting auxiliary air passage 20, and the on-off valve 23 is connected to the valve spring 2.
9 in the closing direction, and opens against the bias of the valve spring 29 by the intake negative pressure after the engine 1 has completely exploded.