JPH0342052U

JPH0342052U -

Info

Publication number: JPH0342052U
Application number: JP10184289U
Authority: JP
Priority date: 1989-09-01
Filing date: 1989-09-01
Publication date: 1991-04-22

Description

[Brief explanation of drawings]

第１図はこの考案の実施例を示すスタータ装置
の要部の断面図、第２図は第１図のスタータ装置
の暖機運転時の状態を示す断面図、第３図は第１
図のスタータ装置の暖機運転時のプランジヤ全閉
寸前の状態を示す断面図、第４図はスタータ装置
を備えたキヤブレタの縦断側面図、第５図は第４
図のスタータ装置の縦断正面図、第６図、第７図
、第８図は従来のスタータ装置の要部の断面図で
、第６図は全通路全開、第７図はスタータエア通
路全閉時、第８図は全通路全閉時の状態を示し、
第９図は従来のスタータ装置の暖機運転時のプラ
ンジヤストロークと燃料混合気の濃度との関係を
示す図表である。１……キヤブレタボデイ、２……シリンダ、３
……プランジヤ、４……スタータ通路、５……ス
タータ燃料通路、６……スタータエア通路、７…
…ジエツトニードル、８……細径部、９……フラ
ンジ、１０……段部。 Fig. 1 is a cross-sectional view of the main parts of a starter device showing an embodiment of this invention, Fig. 2 is a cross-sectional view showing the state of the starter device of Fig. 1 during warm-up operation, and Fig. 3 is a cross-sectional view of the starter device of Fig. 1.
Figure 4 is a cross-sectional view showing a state where the plunger is on the verge of being fully closed during warm-up operation of the starter device, Figure 4 is a vertical side view of the carburetor equipped with the starter device, and Figure 5 is the
Figures 6, 7, and 8 are cross-sectional views of the main parts of the conventional starter device, with all passages fully open in Figure 6 and starter air passages fully closed in Figure 7. Figure 8 shows the state when all passages are fully closed.
FIG. 9 is a chart showing the relationship between plunger stroke and fuel mixture concentration during warm-up operation of a conventional starter device. 1... Carburetor body, 2... Cylinder, 3
...Plunger, 4...Starter passage, 5...Starter fuel passage, 6...Starter air passage, 7...
...Jet needle, 8...Small diameter part, 9...Flange, 10...Step part.

Claims

[Scope of utility model registration request]

A cylinder containing a plunger that moves forward and backward by external operation is formed inside the carburetor body, and a starter fuel passage opened in the cylinder head is opened and closed by a valve seat in the plunger head and a jet needle protruding from the cylinder head. In a starter device for a carburetor, in which a starter air passage opened on the side surface of the cylinder and a starter passage connected to the engine intake passage are controlled to open and close by the side surface of a plunger, the starter passage is opened and closed from the valve seat surface of the starter fuel passage. The dimension N to the opening is set larger than the dimension M to the starter air passage opening, and a narrow diameter part is formed in the head of the plunger via a step, and from the step to the valve seat surface of the plunger head. A starter device for a carburetor, characterized in that a dimension of is set to match the dimension M.