JPH03104840U - - Google Patents

Description

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

第１図は本考案に係る内燃機関の吸入負圧検出
装置の第１の実施例の概略図、第２図は同上実施
例における小室の構成を示す図で、ａは斜視図、
ｂは平面図、第３図は同上の小室の他の例を示す
正面図、第４図は第２の実施例の概略図、第５図
は第２の実施例の作用を説明する概略図、第６図
は従来の吸入負圧検出装置の一例の概略図である
。 ６……内燃機関、７……吸気管、９……吸気絞
り弁、１０……吸気マニホールド、１１……分岐
部、１２……吸気通路、１３……圧力導入用の管
路、１４……小室、１４ａ……小室本体、１５…
…吸気圧センサ、１６，１８……微量空気導入用
の管路。 FIG. 1 is a schematic diagram of a first embodiment of the suction negative pressure detection device for an internal combustion engine according to the present invention, and FIG. 2 is a diagram showing the configuration of a small chamber in the same embodiment, where a is a perspective view;
b is a plan view, FIG. 3 is a front view showing another example of the same small chamber, FIG. 4 is a schematic diagram of the second embodiment, and FIG. 5 is a schematic diagram explaining the operation of the second embodiment. , FIG. 6 is a schematic diagram of an example of a conventional suction negative pressure detection device. 6... Internal combustion engine, 7... Intake pipe, 9... Intake throttle valve, 10... Intake manifold, 11... Branch, 12... Intake passage, 13... Pipe line for pressure introduction, 14... Small room, 14a... Small room main body, 15...
...Intake pressure sensor, 16, 18...Pipe line for introducing a small amount of air.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 機関の吸気通路の吸気絞り弁位置よりも下流側
の圧力を取り出す管路と該管路と連通する容積室
とを設け、容積室の上方に位置して該室の圧力を
検出する吸気圧センサを設ける一方、少なくとも
吸気絞り弁の小開度時に吸気通路の吸気絞り弁上
流側と前記容積室とを連通する微量空気導入用の
管路を設け、前記容積室本体を略断面円形状に形
成し、微量空気導入用の管路を、微量空気が容積
室本体の略円筒状周壁の接線方向から流入するよ
うに容積室に接続したことを特徴とする内燃機関
の吸入負圧検出装置。 An intake pressure sensor that is provided with a conduit that takes out the pressure downstream of the intake throttle valve position in the intake passage of the engine and a volume chamber that communicates with the conduit, and that is located above the volume chamber and detects the pressure in the chamber. and a conduit for introducing a small amount of air that communicates the upstream side of the intake throttle valve of the intake passage with the volume chamber at least when the intake throttle valve is opened at a small opening, and the volume chamber main body is formed to have a substantially circular cross section. An intake negative pressure detection device for an internal combustion engine, characterized in that a conduit for introducing a small amount of air is connected to the volume chamber so that the small amount of air flows in from a tangential direction of a substantially cylindrical peripheral wall of a main body of the volume chamber.