JPS6290966U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の燃料の大気放出抑制装置の一
実施例を示す系統図、第２図は従来の燃料供給装
置を示す斜視図、第３図は第２図のエバポ配管側
を示す系統図である。 １７……タンク側エバポ配管、１９……吸気側
エバポ配管、２１……三方弁、２３……キヤニス
ター配管、２５……圧力センサー、２７……制御
装置。 Figure 1 is a system diagram showing one embodiment of the fuel emission control device of the present invention, Figure 2 is a perspective view of a conventional fuel supply system, and Figure 3 is a system diagram showing the evaporative piping side of Figure 2. It is a diagram. 17... Tank side evaporative piping, 19... Intake side evaporative piping, 21... Three-way valve, 23... Canister piping, 25... Pressure sensor, 27... Control device.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] タンク側エバポ配管、吸気側エバポ配管および
キヤニスター配管にそれぞれ接続される三方弁と
、前記吸気側エバポ配管内の圧力を測定する圧力
センサーと、前記圧力センサーからの圧力信号を
入力し、この圧力信号の値が予め定められた値よ
り小さい時に、前記三方弁を作動し、前記タンク
側エバポ配管と吸気側エバポ配管とを連通し、前
記値より大きい時に、前記タンク側エバポ配管と
キヤニスター配管とを連通し、さらにエンジンの
停止時に、タンク側エバポ配管およびキヤニスタ
ー配管の吸気側エバポ配管への連通を阻止する制
御手段とを有することを特徴とする燃料の大気放
出抑制装置。 A three-way valve connected to the tank-side evaporative piping, intake-side evaporative piping, and canister piping, a pressure sensor that measures the pressure in the intake-side evaporative piping, and a pressure signal from the pressure sensor are input, and this pressure signal is input. When the value of is smaller than a predetermined value, the three-way valve is operated to connect the tank side evaporative piping and the intake side evaporative piping, and when it is larger than the value, the tank side evaporative piping and the canister piping are connected. What is claimed is: 1. A device for suppressing fuel discharge into the atmosphere, comprising a control means for communicating with the intake side evaporative piping, and further for preventing communication of the tank side evaporative piping and the canister piping with the intake side evaporative piping when the engine is stopped.