| 摘要 |
PURPOSE:To control engine speed and obtain the function as supercharge-pressure controller by detecting a prescribed engine state signal and controlling the opening degree of a secondary-side throttle valve, in an internal-combustion engine having a supercharger which is equipped with a carburetor. CONSTITUTION:The first opening part 32 as supercharge-pressure discharge port is formed on the upstream side of a supercharger 6 in an intake passage 4, and the second opening part 34 as supercharge-pressure intake port is formed on the downstream side of a secondary-side throttle valve 20, and a communication passage 36 for allowing the opening part 32 and the opening part 34 to communicate each other is formed. A branched passage 38 is branched midway in the communication passage 36, and the upstream side from the branched passage 38 of the communication passage 36 is formed to the first passage 40, and the downstream side from the branched passage 38 is formed to the second passage 42. An actuator 48 is installed into the branched passage 38, and one edge of a rod 52 whose the other edge is pivotally supported onto a lever 50 is installed onto the diaphragm 44 of the actuator 48. One edge of the laver 50 is fixed onto the secondary-side throttle valve 20. A solenoid valve 60 connected with a car- speed sensor 54, supercharge-pressure switch 56, and a water-temperature sensor 58 is installed into the passage 40. |
