JPS58127168U - Automotive fuel evaporation control device - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来の燃料蒸発制御装置の系統図、第２図は本
考案の燃料蒸発制御装置の系統図、第３図は脱離空気制
御弁の拡大断面図、第４図ａ、　　ｂは気化器の吸気通
路における吸気空気量に対するポート負圧およびベンチ
ュリ負圧特性図と脱離空気量特性図とをそれぞれ示す。 １・・・気化器、２・・・ベンチュリ、３・・・絞り弁
、４・・・吸気管、５・・・機関、１０・・・燃料タン
ク、１１・・・キャニスタ、１２．１２Ａ・・・脱離空
気制御弁、１４・・・脱離用通路、１５・・・負圧通路
。Fig. 1 is a system diagram of a conventional fuel evaporation control device, Fig. 2 is a system diagram of a fuel evaporation control device of the present invention, Fig. 3 is an enlarged sectional view of a desorption air control valve, and Figs. 4a and b are FIG. 4 shows a characteristic diagram of port negative pressure and venturi negative pressure with respect to the amount of intake air in the intake passage of the carburetor, and a characteristic diagram of the amount of desorbed air. DESCRIPTION OF SYMBOLS 1... Carburetor, 2... Venturi, 3... Throttle valve, 4... Intake pipe, 5... Engine, 10... Fuel tank, 11... Canister, 12.12A. ...Desorption air control valve, 14...Desorption passage, 15...Negative pressure passage.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 吸気負正に応じてキャニスタ内の脱離空気を機関の吸気
管に導出する脱離空気制御弁を有する自動車用燃料蒸発
制御装置において、前記脱離空気制御弁に吸気負圧を導
入する通路端を気化器のベンチュリに開口したことを特
徴とする自動車用燃料蒸発制御装置。In a fuel evaporation control device for an automobile having a desorption air control valve that guides desorption air in a canister to an intake pipe of an engine according to the negative or positive of the intake air, a passage end that introduces an intake negative pressure to the desorption air control valve. A fuel evaporation control device for an automobile, characterized in that a venturi of a carburetor is opened.