Air intake control system in engine

In an intake-air amount control system for an engine, a joint surface (28f, 211f) of a control block (28) is coupled to a mounting surface (27f) formed on a throttle body (17) in parallel to an intake passage (17a), and a bypass upstream groove (32i) communicating with an upstream portion of the int...

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Bibliographische Detailangaben
Hauptverfasser:	HAYASHI, AKIRA+, SHIMOKAWA, JUNICHI, AKIYAMA, HIROSHIGE, SUZUKI, OSAMU, UEDA, MINORU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES CYCLE AXLE SUSPENSIONS CYCLE FRAMES CYCLE SIDE-CARS, FORECARS, OR THE LIKE CYCLE STEERING DEVICES CYCLES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 INTERNAL-COMBUSTION PISTON ENGINES LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FORCYCLES SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	In an intake-air amount control system for an engine, a joint surface (28f, 211f) of a control block (28) is coupled to a mounting surface (27f) formed on a throttle body (17) in parallel to an intake passage (17a), and a bypass upstream groove (32i) communicating with an upstream portion of the intake passage (17a) and a bypass downstream groove (32o) communicating with a downstream portion of the intake passage (17a) are defined in at least one of the surfaces (27f, 28f). A valve bore (34) is provided in the control block (28) to permit the communication between the bypass upstream groove (32i) and the bypass downstream groove (32o), and a bypass valve (25) provided in the valve bore (34) and an actuator (28) for the bypass valve (25) are disposed in a device block (11) in parallel to the intake passage (17a). Thus, the workability and the assemblability can be enhanced, while enabling the intake-air amount control system for the engine including the bypass valve and the actuator to be constructed compactly.