| 摘要 |
PURPOSE:To compensate variation of idle openings of throttle valves by connecting a plurality of distribution passages each leading to an intake passage on a downstream side of the throttle valves to an air cleaner through a common passage, and providing an air amount control means to the common passage. CONSTITUTION:Three throttle valves 21 are commonly fixed to a valve shaft 20, and opened/closed synchronously to rotational operation of the valve shaft 20. Distribution passages 26 leading to intake passages 151 to 153 on a downstream side in an intake direction 16 compared to the throttle valves 21 are connected to an air cleaner through a first common passage 29 provided with a first air amount control means 30. Air is introduced from the air cleaner 13 through the common passage 29 and the distribution passage 26 according to a negative pressure on the downstream side of the throttle valves 21. Variation of idle openings of the throttle valves 21 is compensated, and thereby idle intake amounts of cylinders 1 is eliminated. |
