JPS6170540U - - Google Patents

Description

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

第１図は本考案装置の実施例を示す概略図、第
２図は制御のフローチヤート、第３図は第１リリ
ーフ通路が開かれる運転域と第２リリーフ通路が
開かれる運転域とを示す説明図である。 １１…吸気通路、１２…主吸気通路、１３…過
給通路、１４…空気量検出装置、１７…過給機、
３１…第１リリーフ通路、３２…第２リリーフ通
路、３３…制御弁。 Fig. 1 is a schematic diagram showing an embodiment of the device of the present invention, Fig. 2 is a flowchart of control, and Fig. 3 shows an operating range in which the first relief passage is opened and an operating range in which the second relief passage is opened. It is an explanatory diagram. 11...Intake passage, 12...Main intake passage, 13...Supercharging passage, 14...Air amount detection device, 17...Supercharger,
31...first relief passage, 32...second relief passage, 33...control valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 空気量検出装置を設けた吸気通路を上記空気量
検出装置下流で分岐させて、主吸気通路と、容積
型エアポンプからなる過給機を介設した過給通路
とを形成した過給機付エンジンの吸気装置におい
て、上記過給機下流の過給通路を主吸気通路に連
通させる第１リリーフ通路と、上記過給機下流の
過給通路を過給機上流の過給通路に連通させる第
２リリーフ通路とを設けるとともに、吸気量が少
ない運転時には上記第２リリーフ通路を開き、吸
気量が多い運転時には上記第１リリーフ通路を開
く制御弁を設けたことを特徴とする過給機付エン
ジンの吸気装置。 A supercharged engine in which an intake passage provided with an air amount detection device is branched downstream of the air amount detection device to form a main intake passage and a supercharging passage interposed with a supercharger consisting of a positive displacement air pump. In the intake system, a first relief passage communicates a supercharging passage downstream of the supercharger with a main intake passage, and a second relief passage communicates a supercharging passage downstream of the supercharger with a supercharging passage upstream of the supercharger. A supercharged engine characterized in that a control valve is provided which opens the second relief passage during operation with a small intake air amount and opens the first relief passage during operation with a large intake air amount. Intake device.