VEHICLE INTAKE PIPING STRUCTURE

• Main Authors: ICHIKAWA TETSUYA, YOSHIMURA HITOSHI, YASUI TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 04.06.2020
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

To allow for suppression of removal of airflow from piping at a position upstream of an air flowmeter.SOLUTION: An air cleaner 100 comprises: a casing 110 that accommodates a filter member 130; and an outlet pipe 120 that is provided in a downstream end of the casing 110, connected to an air inlet hose 200, and is smaller in a flow path cross sectional area than that of the casing 110. An air flowmeter 300 is provided in the outlet pipe 120. A throttle part 122 having a convex-shaped cross section and having a reduced inner diameter is formed from an upstream end 124 connected to the casing 110 to an installation position of the air flowmeter 300 in the outlet pipe 120.SELECTED DRAWING: Figure 2 【課題】エアフローメータの上流における空気流の、配管からの剥離を抑制可能とする。【解決手段】エアクリーナ１００は、フィルタ部材１３０を収容するケーシング１１０と、ケーシング１１０の下流端に設けられるとともにエアインレットホース２００に接続されケーシング１１０よりも流路断面積の小さいアウトレットパイプ１２０とを備える。エアフローメータ３００は、アウトレットパイプ１２０に設けられる。アウトレットパイプ１２０の、ケーシング１１０と接続される上流端１２４からエアフローメータ３００の設置箇所に亘って、断面凸曲面状であり内径が縮小される絞り部１２２が形成される。【選択図】図２